| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.avro; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.avro.Schema.Field; |
| import org.apache.avro.generic.GenericData; |
| import org.apache.avro.generic.GenericRecord; |
| import org.codehaus.jackson.JsonNode; |
| import org.codehaus.jackson.io.JsonStringEncoder; |
| import org.codehaus.jackson.map.ObjectMapper; |
| import org.codehaus.jackson.node.TextNode; |
| |
| /** |
| * <p> |
| * A fluent interface for building {@link Schema} instances. The flow of the API |
| * is designed to mimic the <a |
| * href="http://avro.apache.org/docs/current/spec.html#schemas">Avro Schema |
| * Specification</a> |
| * </p> |
| * For example, the below JSON schema and the fluent builder code to create it |
| * are very similar: |
| * |
| * <pre> |
| * { |
| * "type": "record", |
| * "name": "HandshakeRequest", "namespace":"org.apache.avro.ipc", |
| * "fields": [ |
| * {"name": "clientHash", |
| * "type": {"type": "fixed", "name": "MD5", "size": 16}}, |
| * {"name": "clientProtocol", "type": ["null", "string"]}, |
| * {"name": "serverHash", "type": "MD5"}, |
| * {"name": "meta", "type": ["null", {"type": "map", "values": "bytes"}]} |
| * ] |
| * } |
| * </pre> |
| * |
| * <pre> |
| * Schema schema = SchemaBuilder |
| * .record("HandshakeRequest").namespace("org.apache.avro.ipc) |
| * .fields() |
| * .name("clientHash").type().fixed("MD5").size(16).noDefault() |
| * .name("clientProtocol").type().nullable().stringType().noDefault() |
| * .name("serverHash").type("MD5") |
| * .name("meta").type().nullable().map().values().bytesType().noDefault() |
| * .endRecord(); |
| * </pre> |
| * <p/> |
| * |
| * <h5>Usage Guide</h5> |
| * SchemaBuilder chains together many smaller builders and maintains nested |
| * context in order to mimic the Avro Schema specification. Every Avro type in |
| * JSON has required and optional JSON properties, as well as user-defined |
| * properties. |
| * <p/> |
| * <h6>Selecting and Building an Avro Type</h6> |
| * The API analogy for the right hand side of the Avro Schema JSON |
| * <pre> |
| * "type": |
| * </pre> |
| * is a {@link TypeBuilder}, {@link FieldTypeBuilder}, or |
| * {@link UnionFieldTypeBuilder}, depending on the context. These types all |
| * share a similar API for selecting and building types. |
| * <p/> |
| * <h5>Primitive Types</h5> |
| * All Avro primitive types are trivial to configure. A primitive type in |
| * Avro JSON can be declared two ways, one that supports custom properties |
| * and one that does not: |
| * <pre> |
| * {"type":"int"} |
| * {"type":{"name":"int"}} |
| * {"type":{"name":"int", "customProp":"val"}} |
| * </pre> |
| * The analogous code form for the above three JSON lines are the below |
| * three lines: |
| * <pre> |
| * .intType() |
| * .intBuilder().endInt() |
| * .intBuilder().prop("customProp", "val").endInt() |
| * </pre> |
| * Every primitive type has a shortcut to create the trivial type, and |
| * a builder when custom properties are required. The first line above is |
| * a shortcut for the second, analogous to the JSON case. |
| * <h6>Named Types</h6> |
| * Avro named types have names, namespace, aliases, and doc. In this API |
| * these share a common parent, {@link NamespacedBuilder}. |
| * The builders for named types require a name to be constructed, and optional |
| * configuration via: |
| * <li>{@link NamespacedBuilder#doc()}</li> |
| * <li>{@link NamespacedBuilder#namespace(String)}</li> |
| * <li>{@link NamespacedBuilder#aliases(String...)}</li> |
| * <li>{@link PropBuilder#prop(String, String)}</li> |
| * <p/> |
| * Each named type completes configuration of the optional properties |
| * with its own method: |
| * <li>{@link FixedBuilder#size(int)}</li> |
| * <li>{@link EnumBuilder#symbols(String...)}</li> |
| * <li>{@link RecordBuilder#fields()}</li> |
| * Example use of a named type with all optional parameters: |
| * <pre> |
| * .enumeration("Suit").namespace("org.apache.test") |
| * .aliases("org.apache.test.OldSuit") |
| * .doc("CardSuits") |
| * .prop("customProp", "val") |
| * .symbols("SPADES", "HEARTS", "DIAMONDS", "CLUBS") |
| * </pre> |
| * Which is equivalent to the JSON: |
| * <pre> |
| * { "type":"enum", |
| * "name":"Suit", "namespace":"org.apache.test", |
| * "aliases":["org.apache.test.OldSuit"], |
| * "doc":"Card Suits", |
| * "customProp":"val", |
| * "symbols":["SPADES", "HEARTS", "DIAMONDS", "CLUBS"] |
| * } |
| * </pre> |
| * <h6>Nested Types</h6> |
| * The Avro nested types, map and array, can have custom properties like |
| * all avro types, are not named, and must specify a nested type. |
| * After configuration of optional properties, an array or map |
| * builds or selects its nested type with {@link ArrayBuilder#items()} |
| * and {@link MapBuilder#values()}, respectively. |
| * |
| * <h6>Fields</h6> |
| * {@link RecordBuilder#fields()} returns a {@link FieldAssembler} for |
| * defining the fields of the record and completing it. |
| * Each field must have a name, specified via {@link FieldAssembler#name(String)}, |
| * which returns a {@link FieldBuilder} for defining aliases, custom properties, |
| * and documentation of the field. After configuring these optional values for |
| * a field, the type is selected or built with {@link FieldBuilder#type()}. |
| * <p/> |
| * Fields have default values that must be specified to complete the field. |
| * {@link FieldDefault#noDefault()} is available for all field types, and |
| * a specific method is available for each type to use a default, for example |
| * {@link IntDefault#intDefault(int)} |
| * <p/> |
| * There are field shortcut methods on {@link FieldAssembler} for primitive types. |
| * These shortcuts create required, optional, and nullable fields, but do not |
| * support field aliases, doc, or custom properties. |
| * |
| * <h6>Unions</h6> |
| * Union types are built via {@link TypeBuilder#unionOf()} or |
| * {@link FieldTypeBuilder#unionOf()} in the context of type selection. |
| * This chains together multiple types, in union order. For example: |
| * <pre> |
| * .unionOf() |
| * .fixed("IPv4").size(4).and() |
| * .fixed("IPv6").size(16).and() |
| * .nullType().endUnion() |
| * </pre> |
| * is equivalent to the Avro schema JSON: |
| * <pre> |
| * [ |
| * {"type":"fixed", "name":"IPv4", "size":4}, |
| * {"type":"fixed", "name":"IPv6", "size":16}, |
| * "null" |
| * ] |
| * </pre> |
| * In a field context, the first type of a union defines what default type |
| * is allowed. |
| * </p> |
| * Unions have two shortcuts for common cases. nullable() |
| * creates a union of a type and null. In a field type context, optional() |
| * is available and creates a union of null and a type, with a null default. |
| * The below two are equivalent: |
| * <pre> |
| * .unionOf().intType().and().nullType().endUnion() |
| * .nullable().intType() |
| * </pre> |
| * The below two field declarations are equivalent: |
| * <pre> |
| * .name("f").type().unionOf().nullType().and().longType().endUnion().nullDefault() |
| * .name("f").type().optional().longType() |
| * </pre> |
| * |
| * <h6>Explicit Types and Types by Name</h6> |
| * Types can also be specified explicitly by passing in a Schema, or by name: |
| * <pre> |
| * .type(Schema.create(Schema.Type.INT)) // explicitly specified |
| * .type("MD5") // reference by full name or short name |
| * .type("MD5", "org.apache.avro.test") // reference by name and namespace |
| * </pre> |
| * When a type is specified by name, and the namespace is absent or null, the |
| * namespace is inherited from the enclosing context. A namespace will |
| * propagate as a default to child fields, nested types, or later defined types |
| * in a union. To specify a name that has no namespace and ignore the inherited |
| * namespace, set the namespace to "". |
| * <p/> |
| * {@link SchemaBuilder#builder(String)} returns a type builder with a default |
| * namespace. {@link SchemaBuilder#builder()} returns a type builder with no |
| * default namespace. |
| */ |
| public class SchemaBuilder { |
| |
| private SchemaBuilder() { |
| } |
| |
| /** |
| * Create a builder for Avro schemas. |
| */ |
| public static TypeBuilder<Schema> builder() { |
| return new TypeBuilder<Schema>(new SchemaCompletion(), new NameContext()); |
| } |
| |
| /** |
| * Create a builder for Avro schemas with a default namespace. Types created |
| * without namespaces will inherit the namespace provided. |
| */ |
| public static TypeBuilder<Schema> builder(String namespace) { |
| return new TypeBuilder<Schema>(new SchemaCompletion(), |
| new NameContext().namespace(namespace)); |
| } |
| |
| /** |
| * Create a builder for an Avro record with the specified name. |
| * This is equivalent to: |
| * <pre> |
| * builder().record(name); |
| * </pre> |
| * @param name the record name |
| */ |
| public static RecordBuilder<Schema> record(String name) { |
| return builder().record(name); |
| } |
| |
| /** |
| * Create a builder for an Avro enum with the specified name and symbols (values). |
| * This is equivalent to: |
| * <pre> |
| * builder().enumeration(name); |
| * </pre> |
| * @param name the enum name |
| */ |
| public static EnumBuilder<Schema> enumeration(String name) { |
| return builder().enumeration(name); |
| } |
| |
| /** |
| * Create a builder for an Avro fixed type with the specified name and size. |
| * This is equivalent to: |
| * <pre> |
| * builder().fixed(name); |
| * </pre> |
| * @param name the fixed name |
| */ |
| public static FixedBuilder<Schema> fixed(String name) { |
| return builder().fixed(name); |
| } |
| |
| /** |
| * Create a builder for an Avro array |
| * This is equivalent to: |
| * <pre> |
| * builder().array(); |
| * </pre> |
| */ |
| public static ArrayBuilder<Schema> array() { |
| return builder().array(); |
| } |
| |
| /** |
| * Create a builder for an Avro map |
| * This is equivalent to: |
| * <pre> |
| * builder().map(); |
| * </pre> |
| */ |
| public static MapBuilder<Schema> map() { |
| return builder().map(); |
| } |
| |
| /** |
| * Create a builder for an Avro union |
| * This is equivalent to: |
| * <pre> |
| * builder().unionOf(); |
| * </pre> |
| */ |
| public static BaseTypeBuilder<UnionAccumulator<Schema>> unionOf() { |
| return builder().unionOf(); |
| } |
| |
| /** |
| * Create a builder for a union of a type and null. |
| * This is a shortcut for: |
| * <pre> |
| * builder().nullable(); |
| * </pre> |
| * and the following two lines are equivalent: |
| * <pre> |
| * nullable().intType(); |
| * </pre> |
| * <pre> |
| * unionOf().intType().and().nullType().endUnion(); |
| * </pre> |
| */ |
| public static BaseTypeBuilder<Schema> nullable() { |
| return builder().nullable(); |
| } |
| |
| |
| /** |
| * An abstract builder for all Avro types. All Avro types |
| * can have arbitrary string key-value properties. |
| */ |
| public static abstract class PropBuilder<S extends PropBuilder<S>> { |
| private Map<String, JsonNode> props = null; |
| protected PropBuilder() { |
| } |
| |
| /** |
| * Set name-value pair properties for this type or field. |
| */ |
| public final S prop(String name, String val) { |
| return prop(name, TextNode.valueOf(val)); |
| } |
| |
| // for internal use by the Parser |
| final S prop(String name, JsonNode val) { |
| if(!hasProps()) { |
| props = new HashMap<String, JsonNode>(); |
| } |
| props.put(name, val); |
| return self(); |
| } |
| |
| private boolean hasProps() { |
| return (props != null); |
| } |
| |
| final <T extends JsonProperties> T addPropsTo(T jsonable) { |
| if (hasProps()) { |
| for(Map.Entry<String, JsonNode> prop : props.entrySet()) { |
| jsonable.addProp(prop.getKey(), prop.getValue()); |
| } |
| } |
| return jsonable; |
| } |
| /** a self-type for chaining builder subclasses. Concrete subclasses |
| * must return 'this' **/ |
| protected abstract S self(); |
| } |
| |
| /** |
| * An abstract type that provides builder methods for configuring the name, |
| * doc, and aliases of all Avro types that have names (fields, Fixed, Record, |
| * and Enum). |
| * <p/> |
| * All Avro named types and fields have 'doc', 'aliases', and 'name' |
| * components. 'name' is required, and provided to this builder. 'doc' and |
| * 'alises' are optional. |
| */ |
| public static abstract class NamedBuilder<S extends NamedBuilder<S>> extends |
| PropBuilder<S> { |
| private final String name; |
| private final NameContext names; |
| private String doc; |
| private String[] aliases; |
| |
| protected NamedBuilder(NameContext names, String name) { |
| checkRequired(name, "Type must have a name"); |
| this.names = names; |
| this.name = name; |
| } |
| |
| /** configure this type's optional documentation string **/ |
| public final S doc(String doc) { |
| this.doc = doc; |
| return self(); |
| } |
| |
| /** configure this type's optional name aliases **/ |
| public final S aliases(String... aliases) { |
| this.aliases = aliases; |
| return self(); |
| } |
| |
| final String doc() { |
| return doc; |
| } |
| |
| final String name() { |
| return name; |
| } |
| |
| final NameContext names() { |
| return names; |
| } |
| |
| final Schema addAliasesTo(Schema schema) { |
| if (null != aliases) { |
| for (String alias : aliases) { |
| schema.addAlias(alias); |
| } |
| } |
| return schema; |
| } |
| |
| final Field addAliasesTo(Field field) { |
| if (null != aliases) { |
| for (String alias : aliases) { |
| field.addAlias(alias); |
| } |
| } |
| return field; |
| } |
| } |
| |
| /** |
| * An abstract type that provides builder methods for configuring the |
| * namespace for all Avro types that have namespaces (Fixed, Record, and |
| * Enum). |
| */ |
| public static abstract class NamespacedBuilder<R, S extends NamespacedBuilder<R, S>> |
| extends NamedBuilder<S> { |
| private final Completion<R> context; |
| private String namespace; |
| |
| protected NamespacedBuilder(Completion<R> context, NameContext names, |
| String name) { |
| super(names, name); |
| this.context = context; |
| } |
| |
| /** |
| * Set the namespace of this type. To clear the namespace, set empty string. |
| * <p/> |
| * When the namespace is null or unset, the namespace of the type defaults |
| * to the namespace of the enclosing context. |
| **/ |
| public final S namespace(String namespace) { |
| this.namespace = namespace; |
| return self(); |
| } |
| |
| final String space() { |
| if (null == namespace) { |
| return names().namespace; |
| } |
| return namespace; |
| } |
| |
| final Schema completeSchema(Schema schema) { |
| addPropsTo(schema); |
| addAliasesTo(schema); |
| names().put(schema); |
| return schema; |
| } |
| |
| final Completion<R> context() { |
| return context; |
| } |
| } |
| |
| /** |
| * An abstraction for sharing code amongst all primitive type builders. |
| */ |
| private static abstract class PrimitiveBuilder<R, P extends PrimitiveBuilder<R, P>> |
| extends PropBuilder<P> { |
| private final Completion<R> context; |
| private final Schema immutable; |
| |
| protected PrimitiveBuilder(Completion<R> context, NameContext names, |
| Schema.Type type) { |
| this.context = context; |
| this.immutable = names.getFullname(type.getName()); |
| } |
| |
| private R end() { |
| Schema schema = immutable; |
| if (super.hasProps()) { |
| schema = Schema.create(immutable.getType()); |
| addPropsTo(schema); |
| } |
| return context.complete(schema); |
| } |
| } |
| |
| /** |
| * Builds an Avro boolean type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endBoolean()} |
| **/ |
| public static final class BooleanBuilder<R> extends |
| PrimitiveBuilder<R, BooleanBuilder<R>> { |
| private BooleanBuilder(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.BOOLEAN); |
| } |
| |
| private static <R> BooleanBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new BooleanBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected BooleanBuilder<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endBoolean() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro int type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endInt()} |
| **/ |
| public static final class IntBuilder<R> extends |
| PrimitiveBuilder<R, IntBuilder<R>> { |
| private IntBuilder(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.INT); |
| } |
| |
| private static <R> IntBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new IntBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected IntBuilder<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endInt() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro long type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endLong()} |
| **/ |
| public static final class LongBuilder<R> extends |
| PrimitiveBuilder<R, LongBuilder<R>> { |
| private LongBuilder(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.LONG); |
| } |
| |
| private static <R> LongBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new LongBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected LongBuilder<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endLong() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro float type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endFloat()} |
| **/ |
| public static final class FloatBuilder<R> extends |
| PrimitiveBuilder<R, FloatBuilder<R>> { |
| private FloatBuilder(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.FLOAT); |
| } |
| |
| private static <R> FloatBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new FloatBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected FloatBuilder<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endFloat() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro double type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endDouble()} |
| **/ |
| public static final class DoubleBuilder<R> extends |
| PrimitiveBuilder<R, DoubleBuilder<R>> { |
| private DoubleBuilder(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.DOUBLE); |
| } |
| |
| private static <R> DoubleBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new DoubleBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected DoubleBuilder<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endDouble() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro string type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endString()} |
| **/ |
| public static final class StringBldr<R> extends |
| PrimitiveBuilder<R, StringBldr<R>> { |
| private StringBldr(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.STRING); |
| } |
| |
| private static <R> StringBldr<R> create(Completion<R> context, |
| NameContext names) { |
| return new StringBldr<R>(context, names); |
| } |
| |
| @Override |
| protected StringBldr<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endString() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro bytes type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endBytes()} |
| **/ |
| public static final class BytesBuilder<R> extends |
| PrimitiveBuilder<R, BytesBuilder<R>> { |
| private BytesBuilder(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.BYTES); |
| } |
| |
| private static <R> BytesBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new BytesBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected BytesBuilder<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endBytes() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro null type with optional properties. Set properties with |
| * {@link #prop(String, String)}, and finalize with {@link #endNull()} |
| **/ |
| public static final class NullBuilder<R> extends |
| PrimitiveBuilder<R, NullBuilder<R>> { |
| private NullBuilder(Completion<R> context, NameContext names) { |
| super(context, names, Schema.Type.NULL); |
| } |
| |
| private static <R> NullBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new NullBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected NullBuilder<R> self() { |
| return this; |
| } |
| |
| /** complete building this type, return control to context **/ |
| public R endNull() { |
| return super.end(); |
| } |
| } |
| |
| /** |
| * Builds an Avro Fixed type with optional properties, namespace, doc, and |
| * aliases. |
| * <p/> |
| * Set properties with {@link #prop(String, String)}, namespace with |
| * {@link #namespace(String)}, doc with {@link #doc(String)}, and aliases with |
| * {@link #aliases(String[])}. |
| * <p/> |
| * The Fixed schema is finalized when its required size is set via |
| * {@link #size(int)}. |
| **/ |
| public static final class FixedBuilder<R> extends |
| NamespacedBuilder<R, FixedBuilder<R>> { |
| private FixedBuilder(Completion<R> context, NameContext names, String name) { |
| super(context, names, name); |
| } |
| |
| private static <R> FixedBuilder<R> create(Completion<R> context, |
| NameContext names, String name) { |
| return new FixedBuilder<R>(context, names, name); |
| } |
| |
| @Override |
| protected FixedBuilder<R> self() { |
| return this; |
| } |
| |
| /** Configure this fixed type's size, and end its configuration. **/ |
| public R size(int size) { |
| Schema schema = Schema.createFixed(name(), super.doc(), space(), size); |
| completeSchema(schema); |
| return context().complete(schema); |
| } |
| } |
| |
| /** |
| * Builds an Avro Enum type with optional properties, namespace, doc, and |
| * aliases. |
| * <p/> |
| * Set properties with {@link #prop(String, String)}, namespace with |
| * {@link #namespace(String)}, doc with {@link #doc(String)}, and aliases with |
| * {@link #aliases(String[])}. |
| * <p/> |
| * The Enum schema is finalized when its required symbols are set via |
| * {@link #symbols(String[])}. |
| **/ |
| public static final class EnumBuilder<R> extends |
| NamespacedBuilder<R, EnumBuilder<R>> { |
| private EnumBuilder(Completion<R> context, NameContext names, String name) { |
| super(context, names, name); |
| } |
| |
| private static <R> EnumBuilder<R> create(Completion<R> context, |
| NameContext names, String name) { |
| return new EnumBuilder<R>(context, names, name); |
| } |
| |
| @Override |
| protected EnumBuilder<R> self() { |
| return this; |
| } |
| |
| /** Configure this enum type's symbols, and end its configuration. **/ |
| public R symbols(String... symbols) { |
| Schema schema = Schema.createEnum(name(), doc(), space(), |
| Arrays.asList(symbols)); |
| completeSchema(schema); |
| return context().complete(schema); |
| } |
| |
| } |
| |
| /** |
| * Builds an Avro Map type with optional properties. |
| * <p/> |
| * Set properties with {@link #prop(String, String)}. |
| * <p/> |
| * The Map schema's properties are finalized when {@link #values()} or |
| * {@link #values(Schema)} is called. |
| **/ |
| public static final class MapBuilder<R> extends PropBuilder<MapBuilder<R>> { |
| private final Completion<R> context; |
| private final NameContext names; |
| |
| private MapBuilder(Completion<R> context, NameContext names) { |
| this.context = context; |
| this.names = names; |
| } |
| |
| private static <R> MapBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new MapBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected MapBuilder<R> self() { |
| return this; |
| } |
| |
| /** |
| * Return a type builder for configuring the map's nested values schema. |
| * This builder will return control to the map's enclosing context when |
| * complete. |
| **/ |
| public TypeBuilder<R> values() { |
| return new TypeBuilder<R>(new MapCompletion<R>(this, context), names); |
| } |
| |
| /** |
| * Complete configuration of this map, setting the schema of the map values |
| * to the schema provided. Returns control to the enclosing context. |
| **/ |
| public R values(Schema valueSchema) { |
| return new MapCompletion<R>(this, context).complete(valueSchema); |
| } |
| } |
| |
| /** |
| * Builds an Avro Array type with optional properties. |
| * <p/> |
| * Set properties with {@link #prop(String, String)}. |
| * <p/> |
| * The Array schema's properties are finalized when {@link #items()} or |
| * {@link #items(Schema)} is called. |
| **/ |
| public static final class ArrayBuilder<R> extends |
| PropBuilder<ArrayBuilder<R>> { |
| private final Completion<R> context; |
| private final NameContext names; |
| |
| public ArrayBuilder(Completion<R> context, NameContext names) { |
| this.context = context; |
| this.names = names; |
| } |
| |
| private static <R> ArrayBuilder<R> create(Completion<R> context, |
| NameContext names) { |
| return new ArrayBuilder<R>(context, names); |
| } |
| |
| @Override |
| protected ArrayBuilder<R> self() { |
| return this; |
| } |
| |
| /** |
| * Return a type builder for configuring the array's nested items schema. |
| * This builder will return control to the array's enclosing context when |
| * complete. |
| **/ |
| public TypeBuilder<R> items() { |
| return new TypeBuilder<R>(new ArrayCompletion<R>(this, context), names); |
| } |
| |
| /** |
| * Complete configuration of this array, setting the schema of the array |
| * items to the schema provided. Returns control to the enclosing context. |
| **/ |
| public R items(Schema itemsSchema) { |
| return new ArrayCompletion<R>(this, context).complete(itemsSchema); |
| } |
| } |
| |
| /** |
| * internal class for passing the naming context around. This allows for the |
| * following: |
| * <li>Cache and re-use primitive schemas when they do not set |
| * properties.</li> |
| * <li>Provide a default namespace for nested contexts (as |
| * the JSON Schema spec does).</li> |
| * <li>Allow previously defined named types or primitive types |
| * to be referenced by name.</li> |
| **/ |
| private static class NameContext { |
| private static final Set<String> PRIMITIVES = new HashSet<String>(); |
| { |
| PRIMITIVES.add("null"); |
| PRIMITIVES.add("boolean"); |
| PRIMITIVES.add("int"); |
| PRIMITIVES.add("long"); |
| PRIMITIVES.add("float"); |
| PRIMITIVES.add("double"); |
| PRIMITIVES.add("bytes"); |
| PRIMITIVES.add("string"); |
| } |
| private final HashMap<String, Schema> schemas; |
| private final String namespace; |
| |
| private NameContext() { |
| this.schemas = new HashMap<String, Schema>(); |
| this.namespace = null; |
| schemas.put("null", Schema.create(Schema.Type.NULL)); |
| schemas.put("boolean", Schema.create(Schema.Type.BOOLEAN)); |
| schemas.put("int", Schema.create(Schema.Type.INT)); |
| schemas.put("long", Schema.create(Schema.Type.LONG)); |
| schemas.put("float", Schema.create(Schema.Type.FLOAT)); |
| schemas.put("double", Schema.create(Schema.Type.DOUBLE)); |
| schemas.put("bytes", Schema.create(Schema.Type.BYTES)); |
| schemas.put("string", Schema.create(Schema.Type.STRING)); |
| } |
| |
| private NameContext(HashMap<String, Schema> schemas, String namespace) { |
| this.schemas = schemas; |
| this.namespace = "".equals(namespace) ? null : namespace; |
| } |
| |
| private NameContext namespace(String namespace) { |
| return new NameContext(schemas, namespace); |
| } |
| |
| private Schema get(String name, String namespace) { |
| return getFullname(resolveName(name, namespace)); |
| } |
| |
| private Schema getFullname(String fullName) { |
| Schema schema = schemas.get(fullName); |
| if(schema == null) { |
| throw new SchemaParseException("Undefined name: " + fullName); |
| } |
| return schema; |
| } |
| |
| private void put(Schema schema) { |
| String fullName = schema.getFullName(); |
| if(schemas.containsKey(fullName)){ |
| throw new SchemaParseException("Can't redefine: " + fullName); |
| } |
| schemas.put(fullName, schema); |
| } |
| |
| private String resolveName(String name, String space) { |
| if (PRIMITIVES.contains(name) && space == null) { |
| return name; |
| } |
| int lastDot = name.lastIndexOf('.'); |
| if (lastDot < 0) { // short name |
| if (space == null) { |
| space = namespace; |
| } |
| if (space != null && !"".equals(space)) { |
| return space + "." + name; |
| } |
| } |
| return name; |
| } |
| } |
| |
| /** |
| * A common API for building types within a context. BaseTypeBuilder can build |
| * all types other than Unions. {@link TypeBuilder} can additionally build |
| * Unions. |
| * <p/> |
| * The builder has two contexts: |
| * <li>A naming context provides a default namespace and allows for previously |
| * defined named types to be referenced from {@link #type(String)}</li> |
| * <li>A completion context representing the scope that the builder was |
| * created in. A builder created in a nested context (for example, |
| * {@link MapBuilder#values()} will have a completion context assigned by the |
| * {@link MapBuilder}</li> |
| **/ |
| public static class BaseTypeBuilder<R> { |
| private final Completion<R> context; |
| private final NameContext names; |
| |
| private BaseTypeBuilder(Completion<R> context, NameContext names) { |
| this.context = context; |
| this.names = names; |
| } |
| |
| /** Use the schema provided as the type. **/ |
| public final R type(Schema schema) { |
| return context.complete(schema); |
| } |
| |
| /** |
| * Look up the type by name. This type must be previously defined in the |
| * context of this builder. |
| * <p/> |
| * The name may be fully qualified or a short name. If it is a short name, |
| * the default namespace of the current context will additionally be |
| * searched. |
| **/ |
| public final R type(String name) { |
| return type(name, null); |
| } |
| |
| /** |
| * Look up the type by name and namespace. This type must be previously |
| * defined in the context of this builder. |
| * <p/> |
| * The name may be fully qualified or a short name. If it is a fully |
| * qualified name, the namespace provided is ignored. If it is a short name, |
| * the namespace provided is used if not null, else the default namespace of |
| * the current context will be used. |
| **/ |
| public final R type(String name, String namespace) { |
| return type(names.get(name, namespace)); |
| } |
| |
| /** |
| * A plain boolean type without custom properties. This is equivalent to: |
| * <pre> |
| * booleanBuilder().endBoolean(); |
| * </pre> |
| */ |
| public final R booleanType() { |
| return booleanBuilder().endBoolean(); |
| } |
| |
| /** |
| * Build a boolean type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #booleanType()}. |
| */ |
| public final BooleanBuilder<R> booleanBuilder() { |
| return BooleanBuilder.create(context, names); |
| } |
| |
| /** |
| * A plain int type without custom properties. This is equivalent to: |
| * <pre> |
| * intBuilder().endInt(); |
| * </pre> |
| */ |
| public final R intType() { |
| return intBuilder().endInt(); |
| } |
| |
| /** |
| * Build an int type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #intType()}. |
| */ |
| public final IntBuilder<R> intBuilder() { |
| return IntBuilder.create(context, names); |
| } |
| |
| /** |
| * A plain long type without custom properties. This is equivalent to: |
| * <pre> |
| * longBuilder().endLong(); |
| * </pre> |
| */ |
| public final R longType() { |
| return longBuilder().endLong(); |
| } |
| |
| /** |
| * Build a long type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #longType()}. |
| */ |
| public final LongBuilder<R> longBuilder() { |
| return LongBuilder.create(context, names); |
| } |
| |
| /** |
| * A plain float type without custom properties. This is equivalent to: |
| * <pre> |
| * floatBuilder().endFloat(); |
| * </pre> |
| */ |
| public final R floatType() { |
| return floatBuilder().endFloat(); |
| } |
| |
| /** |
| * Build a float type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #floatType()}. |
| */ |
| public final FloatBuilder<R> floatBuilder() { |
| return FloatBuilder.create(context, names); |
| } |
| |
| /** |
| * A plain double type without custom properties. This is equivalent to: |
| * <pre> |
| * doubleBuilder().endDouble(); |
| * </pre> |
| */ |
| public final R doubleType() { |
| return doubleBuilder().endDouble(); |
| } |
| |
| /** |
| * Build a double type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #doubleType()}. |
| */ |
| public final DoubleBuilder<R> doubleBuilder() { |
| return DoubleBuilder.create(context, names); |
| } |
| |
| /** |
| * A plain string type without custom properties. This is equivalent to: |
| * <pre> |
| * stringBuilder().endString(); |
| * </pre> |
| */ |
| public final R stringType() { |
| return stringBuilder().endString(); |
| } |
| |
| /** |
| * Build a string type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #stringType()}. |
| */ |
| public final StringBldr<R> stringBuilder() { |
| return StringBldr.create(context, names); |
| } |
| |
| /** |
| * A plain bytes type without custom properties. This is equivalent to: |
| * <pre> |
| * bytesBuilder().endBytes(); |
| * </pre> |
| */ |
| public final R bytesType() { |
| return bytesBuilder().endBytes(); |
| } |
| |
| /** |
| * Build a bytes type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #bytesType()}. |
| */ |
| public final BytesBuilder<R> bytesBuilder() { |
| return BytesBuilder.create(context, names); |
| } |
| |
| /** |
| * A plain null type without custom properties. This is equivalent to: |
| * <pre> |
| * nullBuilder().endNull(); |
| * </pre> |
| */ |
| public final R nullType() { |
| return nullBuilder().endNull(); |
| } |
| |
| /** |
| * Build a null type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #nullType()}. |
| */ |
| public final NullBuilder<R> nullBuilder() { |
| return NullBuilder.create(context, names); |
| } |
| |
| /** Build an Avro map type Example usage: |
| * <pre> |
| * map().values().intType() |
| * </pre> |
| * Equivalent to Avro JSON Schema: |
| * <pre> |
| * {"type":"map", "values":"int"} |
| * </pre> |
| **/ |
| public final MapBuilder<R> map() { |
| return MapBuilder.create(context, names); |
| } |
| |
| /** Build an Avro array type Example usage: |
| * <pre> |
| * array().items().longType() |
| * </pre> |
| * Equivalent to Avro JSON Schema: |
| * <pre> |
| * {"type":"array", "values":"long"} |
| * </pre> |
| **/ |
| public final ArrayBuilder<R> array() { |
| return ArrayBuilder.create(context, names); |
| } |
| |
| /** Build an Avro fixed type. Example usage: |
| * <pre> |
| * fixed("com.foo.IPv4").size(4) |
| * </pre> |
| * Equivalent to Avro JSON Schema: |
| * <pre> |
| * {"type":"fixed", "name":"com.foo.IPv4", "size":4} |
| * </pre> |
| **/ |
| public final FixedBuilder<R> fixed(String name) { |
| return FixedBuilder.create(context, names, name); |
| } |
| |
| /** Build an Avro enum type. Example usage: |
| * <pre> |
| * enumeration("Suits").namespace("org.cards").doc("card suit names") |
| * .symbols("HEART", "SPADE", "DIAMOND", "CLUB") |
| * </pre> |
| * Equivalent to Avro JSON Schema: |
| * <pre> |
| * {"type":"enum", "name":"Suits", "namespace":"org.cards", |
| * "doc":"card suit names", "symbols":[ |
| * "HEART", "SPADE", "DIAMOND", "CLUB"]} |
| * </pre> |
| **/ |
| public final EnumBuilder<R> enumeration(String name) { |
| return EnumBuilder.create(context, names, name); |
| } |
| |
| /** Build an Avro record type. Example usage: |
| * <pre> |
| * record("com.foo.Foo").fields() |
| * .name("field1").typeInt().intDefault(1) |
| * .name("field2").typeString().noDefault() |
| * .name("field3").optional().typeFixed("FooFixed").size(4) |
| * .endRecord() |
| * </pre> |
| * Equivalent to Avro JSON Schema: |
| * <pre> |
| * {"type":"record", "name":"com.foo.Foo", "fields": [ |
| * {"name":"field1", "type":"int", "default":1}, |
| * {"name":"field2", "type":"string"}, |
| * {"name":"field3", "type":[ |
| * null, {"type":"fixed", "name":"FooFixed", "size":4} |
| * ]} |
| * ]} |
| * </pre> |
| **/ |
| public final RecordBuilder<R> record(String name) { |
| return RecordBuilder.create(context, names, name); |
| } |
| |
| /** Build an Avro union schema type. Example usage: |
| * <pre>unionOf().stringType().and().bytesType().endUnion()</pre> |
| **/ |
| protected BaseTypeBuilder<UnionAccumulator<R>> unionOf() { |
| return UnionBuilder.create(context, names); |
| } |
| |
| /** A shortcut for building a union of a type and null. |
| * <p/> |
| * For example, the code snippets below are equivalent: |
| * <pre>nullable().booleanType()</pre> |
| * <pre>unionOf().booleanType().and().nullType().endUnion()</pre> |
| **/ |
| protected BaseTypeBuilder<R> nullable() { |
| return new BaseTypeBuilder<R>(new NullableCompletion<R>(context), names); |
| } |
| |
| } |
| |
| /** A Builder for creating any Avro schema type. |
| **/ |
| public static final class TypeBuilder<R> extends BaseTypeBuilder<R> { |
| private TypeBuilder(Completion<R> context, NameContext names) { |
| super(context, names); |
| } |
| |
| @Override |
| public BaseTypeBuilder<UnionAccumulator<R>> unionOf() { |
| return super.unionOf(); |
| } |
| |
| @Override |
| public BaseTypeBuilder<R> nullable() { |
| return super.nullable(); |
| } |
| } |
| |
| /** A special builder for unions. Unions cannot nest unions directly **/ |
| private static final class UnionBuilder<R> extends |
| BaseTypeBuilder<UnionAccumulator<R>> { |
| private UnionBuilder(Completion<R> context, NameContext names) { |
| this(context, names, new ArrayList<Schema>()); |
| } |
| |
| private static <R> UnionBuilder<R> create(Completion<R> context, NameContext names) { |
| return new UnionBuilder<R>(context, names); |
| } |
| |
| private UnionBuilder(Completion<R> context, NameContext names, List<Schema> schemas) { |
| super(new UnionCompletion<R>(context, names, schemas), names); |
| } |
| } |
| |
| /** |
| * A special Builder for Record fields. The API is very similar to |
| * {@link BaseTypeBuilder}. However, fields have their own names, properties, |
| * and default values. |
| * <p/> |
| * The methods on this class create builder instances that return their |
| * control to the {@link FieldAssembler} of the enclosing record context after |
| * configuring a default for the field. |
| * <p/> |
| * For example, an int field with default value 1: |
| * <pre> |
| * intSimple().withDefault(1); |
| * </pre> |
| * or an array with items that are optional int types: |
| * <pre> |
| * array().items().optional().intType(); |
| * </pre> |
| */ |
| public static class BaseFieldTypeBuilder<R> { |
| protected final FieldBuilder<R> bldr; |
| protected final NameContext names; |
| private final CompletionWrapper wrapper; |
| |
| protected BaseFieldTypeBuilder(FieldBuilder<R> bldr, CompletionWrapper wrapper) { |
| this.bldr = bldr; |
| this.names = bldr.names(); |
| this.wrapper = wrapper; |
| } |
| |
| /** |
| * A plain boolean type without custom properties. This is equivalent to: |
| * <pre> |
| * booleanBuilder().endBoolean(); |
| * </pre> |
| */ |
| public final BooleanDefault<R> booleanType() { |
| return booleanBuilder().endBoolean(); |
| } |
| |
| /** |
| * Build a boolean type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #booleanType()}. |
| */ |
| public final BooleanBuilder<BooleanDefault<R>> booleanBuilder() { |
| return BooleanBuilder.create(wrap(new BooleanDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain int type without custom properties. This is equivalent to: |
| * <pre> |
| * intBuilder().endInt(); |
| * </pre> |
| */ |
| public final IntDefault<R> intType() { |
| return intBuilder().endInt(); |
| } |
| |
| /** |
| * Build an int type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #intType()}. |
| */ |
| public final IntBuilder<IntDefault<R>> intBuilder() { |
| return IntBuilder.create(wrap(new IntDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain long type without custom properties. This is equivalent to: |
| * <pre> |
| * longBuilder().endLong(); |
| * </pre> |
| */ |
| public final LongDefault<R> longType() { |
| return longBuilder().endLong(); |
| } |
| |
| /** |
| * Build a long type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #longType()}. |
| */ |
| public final LongBuilder<LongDefault<R>> longBuilder() { |
| return LongBuilder.create(wrap(new LongDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain float type without custom properties. This is equivalent to: |
| * <pre> |
| * floatBuilder().endFloat(); |
| * </pre> |
| */ |
| public final FloatDefault<R> floatType() { |
| return floatBuilder().endFloat(); |
| } |
| |
| /** |
| * Build a float type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #floatType()}. |
| */ |
| public final FloatBuilder<FloatDefault<R>> floatBuilder() { |
| return FloatBuilder.create(wrap(new FloatDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain double type without custom properties. This is equivalent to: |
| * <pre> |
| * doubleBuilder().endDouble(); |
| * </pre> |
| */ |
| public final DoubleDefault<R> doubleType() { |
| return doubleBuilder().endDouble(); |
| } |
| |
| /** |
| * Build a double type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #doubleType()}. |
| */ |
| public final DoubleBuilder<DoubleDefault<R>> doubleBuilder() { |
| return DoubleBuilder.create(wrap(new DoubleDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain string type without custom properties. This is equivalent to: |
| * <pre> |
| * stringBuilder().endString(); |
| * </pre> |
| */ |
| public final StringDefault<R> stringType() { |
| return stringBuilder().endString(); |
| } |
| |
| /** |
| * Build a string type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #stringType()}. |
| */ |
| public final StringBldr<StringDefault<R>> stringBuilder() { |
| return StringBldr.create(wrap(new StringDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain bytes type without custom properties. This is equivalent to: |
| * <pre> |
| * bytesBuilder().endBytes(); |
| * </pre> |
| */ |
| public final BytesDefault<R> bytesType() { |
| return bytesBuilder().endBytes(); |
| } |
| |
| /** |
| * Build a bytes type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #bytesType()}. |
| */ |
| public final BytesBuilder<BytesDefault<R>> bytesBuilder() { |
| return BytesBuilder.create(wrap(new BytesDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain null type without custom properties. This is equivalent to: |
| * <pre> |
| * nullBuilder().endNull(); |
| * </pre> |
| */ |
| public final NullDefault<R> nullType() { |
| return nullBuilder().endNull(); |
| } |
| |
| /** |
| * Build a null type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #nullType()}. |
| */ |
| public final NullBuilder<NullDefault<R>> nullBuilder() { |
| return NullBuilder.create(wrap(new NullDefault<R>(bldr)), names); |
| } |
| |
| /** Build an Avro map type **/ |
| public final MapBuilder<MapDefault<R>> map() { |
| return MapBuilder.create(wrap(new MapDefault<R>(bldr)), names); |
| } |
| |
| /** Build an Avro array type **/ |
| public final ArrayBuilder<ArrayDefault<R>> array() { |
| return ArrayBuilder.create(wrap(new ArrayDefault<R>(bldr)), names); |
| } |
| |
| /** Build an Avro fixed type. **/ |
| public final FixedBuilder<FixedDefault<R>> fixed(String name) { |
| return FixedBuilder.create(wrap(new FixedDefault<R>(bldr)), names, name); |
| } |
| |
| /** Build an Avro enum type. **/ |
| public final EnumBuilder<EnumDefault<R>> enumeration(String name) { |
| return EnumBuilder.create(wrap(new EnumDefault<R>(bldr)), names, name); |
| } |
| |
| /** Build an Avro record type. **/ |
| public final RecordBuilder<RecordDefault<R>> record(String name) { |
| return RecordBuilder.create(wrap(new RecordDefault<R>(bldr)), names, name); |
| } |
| |
| private <C> Completion<C> wrap( |
| Completion<C> completion) { |
| if (wrapper != null) { |
| return wrapper.wrap(completion); |
| } |
| return completion; |
| } |
| } |
| |
| /** FieldTypeBuilder adds {@link #unionOf()}, {@link #nullable()}, and {@link #optional()} |
| * to BaseFieldTypeBuilder. **/ |
| public static final class FieldTypeBuilder<R> extends BaseFieldTypeBuilder<R> { |
| private FieldTypeBuilder(FieldBuilder<R> bldr) { |
| super(bldr, null); |
| } |
| |
| /** Build an Avro union schema type. **/ |
| public UnionFieldTypeBuilder<R> unionOf() { |
| return new UnionFieldTypeBuilder<R>(bldr); |
| } |
| |
| /** |
| * A shortcut for building a union of a type and null, with an optional default |
| * value of the non-null type. |
| * <p/> |
| * For example, the two code snippets below are equivalent: |
| * <pre>nullable().booleanType().booleanDefault(true)</pre> |
| * <pre>unionOf().booleanType().and().nullType().endUnion().booleanDefault(true)</pre> |
| **/ |
| public BaseFieldTypeBuilder<R> nullable() { |
| return new BaseFieldTypeBuilder<R>(bldr, new NullableCompletionWrapper()); |
| } |
| |
| /** |
| * A shortcut for building a union of null and a type, with a null default. |
| * <p/> |
| * For example, the two code snippets below are equivalent: |
| * <pre>optional().booleanType()</pre> |
| * <pre>unionOf().nullType().and().booleanType().endUnion().nullDefault()</pre> |
| */ |
| public BaseTypeBuilder<FieldAssembler<R>> optional() { |
| return new BaseTypeBuilder<FieldAssembler<R>>( |
| new OptionalCompletion<R>(bldr), names); |
| } |
| } |
| |
| /** Builder for a union field. The first type in the union corresponds |
| * to the possible default value type. |
| */ |
| public static final class UnionFieldTypeBuilder<R> { |
| private final FieldBuilder<R> bldr; |
| private final NameContext names; |
| |
| private UnionFieldTypeBuilder(FieldBuilder<R> bldr) { |
| this.bldr = bldr; |
| this.names = bldr.names(); |
| } |
| |
| /** |
| * A plain boolean type without custom properties. This is equivalent to: |
| * <pre> |
| * booleanBuilder().endBoolean(); |
| * </pre> |
| */ |
| public UnionAccumulator<BooleanDefault<R>> booleanType() { |
| return booleanBuilder().endBoolean(); |
| } |
| |
| /** |
| * Build a boolean type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #booleanType()}. |
| */ |
| public BooleanBuilder<UnionAccumulator<BooleanDefault<R>>> booleanBuilder() { |
| return BooleanBuilder.create(completion(new BooleanDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain int type without custom properties. This is equivalent to: |
| * <pre> |
| * intBuilder().endInt(); |
| * </pre> |
| */ |
| public UnionAccumulator<IntDefault<R>> intType() { |
| return intBuilder().endInt(); |
| } |
| |
| /** |
| * Build an int type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #intType()}. |
| */ |
| public IntBuilder<UnionAccumulator<IntDefault<R>>> intBuilder() { |
| return IntBuilder.create(completion(new IntDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain long type without custom properties. This is equivalent to: |
| * <pre> |
| * longBuilder().endLong(); |
| * </pre> |
| */ |
| public UnionAccumulator<LongDefault<R>> longType() { |
| return longBuilder().endLong(); |
| } |
| |
| /** |
| * Build a long type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #longType()}. |
| */ |
| public LongBuilder<UnionAccumulator<LongDefault<R>>> longBuilder() { |
| return LongBuilder.create(completion(new LongDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain float type without custom properties. This is equivalent to: |
| * <pre> |
| * floatBuilder().endFloat(); |
| * </pre> |
| */ |
| public UnionAccumulator<FloatDefault<R>> floatType() { |
| return floatBuilder().endFloat(); |
| } |
| |
| /** |
| * Build a float type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #floatType()}. |
| */ |
| public FloatBuilder<UnionAccumulator<FloatDefault<R>>> floatBuilder() { |
| return FloatBuilder.create(completion(new FloatDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain double type without custom properties. This is equivalent to: |
| * <pre> |
| * doubleBuilder().endDouble(); |
| * </pre> |
| */ |
| public UnionAccumulator<DoubleDefault<R>> doubleType() { |
| return doubleBuilder().endDouble(); |
| } |
| |
| /** |
| * Build a double type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #doubleType()}. |
| */ |
| public DoubleBuilder<UnionAccumulator<DoubleDefault<R>>> doubleBuilder() { |
| return DoubleBuilder.create(completion(new DoubleDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain string type without custom properties. This is equivalent to: |
| * <pre> |
| * stringBuilder().endString(); |
| * </pre> |
| */ |
| public UnionAccumulator<StringDefault<R>> stringType() { |
| return stringBuilder().endString(); |
| } |
| |
| /** |
| * Build a string type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #stringType()}. |
| */ |
| public StringBldr<UnionAccumulator<StringDefault<R>>> stringBuilder() { |
| return StringBldr.create(completion(new StringDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain bytes type without custom properties. This is equivalent to: |
| * <pre> |
| * bytesBuilder().endBytes(); |
| * </pre> |
| */ |
| public UnionAccumulator<BytesDefault<R>> bytesType() { |
| return bytesBuilder().endBytes(); |
| } |
| |
| /** |
| * Build a bytes type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #bytesType()}. |
| */ |
| public BytesBuilder<UnionAccumulator<BytesDefault<R>>> bytesBuilder() { |
| return BytesBuilder.create(completion(new BytesDefault<R>(bldr)), names); |
| } |
| |
| /** |
| * A plain null type without custom properties. This is equivalent to: |
| * <pre> |
| * nullBuilder().endNull(); |
| * </pre> |
| */ |
| public UnionAccumulator<NullDefault<R>> nullType() { |
| return nullBuilder().endNull(); |
| } |
| |
| /** |
| * Build a null type that can set custom properties. If custom properties |
| * are not needed it is simpler to use {@link #nullType()}. |
| */ |
| public NullBuilder<UnionAccumulator<NullDefault<R>>> nullBuilder() { |
| return NullBuilder.create(completion(new NullDefault<R>(bldr)), names); |
| } |
| |
| /** Build an Avro map type **/ |
| public MapBuilder<UnionAccumulator<MapDefault<R>>> map() { |
| return MapBuilder.create(completion(new MapDefault<R>(bldr)), names); |
| } |
| |
| /** Build an Avro array type **/ |
| public ArrayBuilder<UnionAccumulator<ArrayDefault<R>>> array() { |
| return ArrayBuilder.create(completion(new ArrayDefault<R>(bldr)), names); |
| } |
| |
| /** Build an Avro fixed type. **/ |
| public FixedBuilder<UnionAccumulator<FixedDefault<R>>> fixed(String name) { |
| return FixedBuilder.create(completion(new FixedDefault<R>(bldr)), names, name); |
| } |
| |
| /** Build an Avro enum type. **/ |
| public EnumBuilder<UnionAccumulator<EnumDefault<R>>> enumeration(String name) { |
| return EnumBuilder.create(completion(new EnumDefault<R>(bldr)), names, name); |
| } |
| |
| /** Build an Avro record type. **/ |
| public RecordBuilder<UnionAccumulator<RecordDefault<R>>> record(String name) { |
| return RecordBuilder.create(completion(new RecordDefault<R>(bldr)), names, name); |
| } |
| |
| private <C> UnionCompletion<C> completion(Completion<C> context) { |
| return new UnionCompletion<C>(context, names, new ArrayList<Schema>()); |
| } |
| } |
| |
| public final static class RecordBuilder<R> extends |
| NamespacedBuilder<R, RecordBuilder<R>> { |
| private RecordBuilder(Completion<R> context, NameContext names, String name) { |
| super(context, names, name); |
| } |
| |
| private static <R> RecordBuilder<R> create(Completion<R> context, |
| NameContext names, String name) { |
| return new RecordBuilder<R>(context, names, name); |
| } |
| |
| @Override |
| protected RecordBuilder<R> self() { |
| return this; |
| } |
| |
| public FieldAssembler<R> fields() { |
| Schema record = Schema.createRecord(name(), doc(), space(), false); |
| // place the record in the name context, fields yet to be set. |
| completeSchema(record); |
| return new FieldAssembler<R>( |
| context(), names().namespace(record.getNamespace()), record); |
| } |
| } |
| |
| public final static class FieldAssembler<R> { |
| private final List<Field> fields = new ArrayList<Field>(); |
| private final Completion<R> context; |
| private final NameContext names; |
| private final Schema record; |
| |
| private FieldAssembler(Completion<R> context, NameContext names, Schema record) { |
| this.context = context; |
| this.names = names; |
| this.record = record; |
| } |
| |
| /** |
| * Add a field with the given name. |
| * @return A {@link FieldBuilder} for the given name. |
| */ |
| public FieldBuilder<R> name(String fieldName) { |
| return new FieldBuilder<R>(this, names, fieldName); |
| } |
| |
| /** |
| * Shortcut for creating a boolean field with the given name and no default. |
| * <p/>This is equivalent to: |
| * <pre> |
| * name(fieldName).type().booleanType().noDefault() |
| * </pre> |
| */ |
| public FieldAssembler<R> requiredBoolean(String fieldName) { |
| return name(fieldName).type().booleanType().noDefault(); |
| } |
| |
| /** |
| * Shortcut for creating an optional boolean field: a union of null and |
| * boolean with null default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().optional().booleanType() |
| * </pre> |
| */ |
| public FieldAssembler<R> optionalBoolean(String fieldName) { |
| return name(fieldName).type().optional().booleanType(); |
| } |
| |
| /** |
| * Shortcut for creating a nullable boolean field: a union of boolean and |
| * null with an boolean default. |
| * <p/> |
| * This is equivalent to: |
| * |
| * <pre> |
| * name(fieldName).type().nullable().booleanType().booleanDefault(defaultVal) |
| * </pre> |
| */ |
| public FieldAssembler<R> nullableBoolean(String fieldName, boolean defaultVal) { |
| return name(fieldName) |
| .type().nullable().booleanType().booleanDefault(defaultVal); |
| } |
| |
| /** |
| * Shortcut for creating an int field with the given name and no default. |
| * <p/>This is equivalent to: |
| * <pre> |
| * name(fieldName).type().intType().noDefault() |
| * </pre> |
| */ |
| public FieldAssembler<R> requiredInt(String fieldName) { |
| return name(fieldName).type().intType().noDefault(); |
| } |
| |
| /** |
| * Shortcut for creating an optional int field: a union of null and int |
| * with null default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().optional().intType() |
| * </pre> |
| */ |
| public FieldAssembler<R> optionalInt(String fieldName) { |
| return name(fieldName).type().optional().intType(); |
| } |
| |
| /** |
| * Shortcut for creating a nullable int field: a union of int and null |
| * with an int default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().nullable().intType().intDefault(defaultVal) |
| * </pre> |
| */ |
| public FieldAssembler<R> nullableInt(String fieldName, int defaultVal) { |
| return name(fieldName).type().nullable().intType().intDefault(defaultVal); |
| } |
| |
| /** |
| * Shortcut for creating a long field with the given name and no default. |
| * <p/>This is equivalent to: |
| * <pre> |
| * name(fieldName).type().longType().noDefault() |
| * </pre> |
| */ |
| public FieldAssembler<R> requiredLong(String fieldName) { |
| return name(fieldName).type().longType().noDefault(); |
| } |
| |
| /** |
| * Shortcut for creating an optional long field: a union of null and long |
| * with null default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().optional().longType() |
| * </pre> |
| */ |
| public FieldAssembler<R> optionalLong(String fieldName) { |
| return name(fieldName).type().optional().longType(); |
| } |
| |
| /** |
| * Shortcut for creating a nullable long field: a union of long and null |
| * with a long default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().nullable().longType().longDefault(defaultVal) |
| * </pre> |
| */ |
| public FieldAssembler<R> nullableLong(String fieldName, long defaultVal) { |
| return name(fieldName).type().nullable().longType().longDefault(defaultVal); |
| } |
| |
| /** |
| * Shortcut for creating a float field with the given name and no default. |
| * <p/>This is equivalent to: |
| * <pre> |
| * name(fieldName).type().floatType().noDefault() |
| * </pre> |
| */ |
| public FieldAssembler<R> requiredFloat(String fieldName) { |
| return name(fieldName).type().floatType().noDefault(); |
| } |
| |
| /** |
| * Shortcut for creating an optional float field: a union of null and float |
| * with null default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().optional().floatType() |
| * </pre> |
| */ |
| public FieldAssembler<R> optionalFloat(String fieldName) { |
| return name(fieldName).type().optional().floatType(); |
| } |
| |
| /** |
| * Shortcut for creating a nullable float field: a union of float and null |
| * with a float default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().nullable().floatType().floatDefault(defaultVal) |
| * </pre> |
| */ |
| public FieldAssembler<R> nullableFloat(String fieldName, float defaultVal) { |
| return name(fieldName).type().nullable().floatType().floatDefault(defaultVal); |
| } |
| |
| /** |
| * Shortcut for creating a double field with the given name and no default. |
| * <p/>This is equivalent to: |
| * <pre> |
| * name(fieldName).type().doubleType().noDefault() |
| * </pre> |
| */ |
| public FieldAssembler<R> requiredDouble(String fieldName) { |
| return name(fieldName).type().doubleType().noDefault(); |
| } |
| |
| /** |
| * Shortcut for creating an optional double field: a union of null and double |
| * with null default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().optional().doubleType() |
| * </pre> |
| */ |
| public FieldAssembler<R> optionalDouble(String fieldName) { |
| return name(fieldName).type().optional().doubleType(); |
| } |
| |
| /** |
| * Shortcut for creating a nullable double field: a union of double and null |
| * with a double default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().nullable().doubleType().doubleDefault(defaultVal) |
| * </pre> |
| */ |
| public FieldAssembler<R> nullableDouble(String fieldName, double defaultVal) { |
| return name(fieldName).type().nullable().doubleType().doubleDefault(defaultVal); |
| } |
| |
| /** |
| * Shortcut for creating a string field with the given name and no default. |
| * <p/>This is equivalent to: |
| * <pre> |
| * name(fieldName).type().stringType().noDefault() |
| * </pre> |
| */ |
| public FieldAssembler<R> requiredString(String fieldName) { |
| return name(fieldName).type().stringType().noDefault(); |
| } |
| |
| /** |
| * Shortcut for creating an optional string field: a union of null and string |
| * with null default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().optional().stringType() |
| * </pre> |
| */ |
| public FieldAssembler<R> optionalString(String fieldName) { |
| return name(fieldName).type().optional().stringType(); |
| } |
| |
| /** |
| * Shortcut for creating a nullable string field: a union of string and null |
| * with a string default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().nullable().stringType().stringDefault(defaultVal) |
| * </pre> |
| */ |
| public FieldAssembler<R> nullableString(String fieldName, String defaultVal) { |
| return name(fieldName).type().nullable().stringType().stringDefault(defaultVal); |
| } |
| |
| /** |
| * Shortcut for creating a bytes field with the given name and no default. |
| * <p/>This is equivalent to: |
| * <pre> |
| * name(fieldName).type().bytesType().noDefault() |
| * </pre> |
| */ |
| public FieldAssembler<R> requiredBytes(String fieldName) { |
| return name(fieldName).type().bytesType().noDefault(); |
| } |
| |
| /** |
| * Shortcut for creating an optional bytes field: a union of null and bytes |
| * with null default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().optional().bytesType() |
| * </pre> |
| */ |
| public FieldAssembler<R> optionalBytes(String fieldName) { |
| return name(fieldName).type().optional().bytesType(); |
| } |
| |
| /** |
| * Shortcut for creating a nullable bytes field: a union of bytes and null |
| * with a bytes default.<p/> |
| * This is equivalent to: |
| * <pre> |
| * name(fieldName).type().nullable().bytesType().bytesDefault(defaultVal) |
| * </pre> |
| */ |
| public FieldAssembler<R> nullableBytes(String fieldName, byte[] defaultVal) { |
| return name(fieldName).type().nullable().bytesType().bytesDefault(defaultVal); |
| } |
| |
| /** |
| * End adding fields to this record, returning control |
| * to the context that this record builder was created in. |
| */ |
| public R endRecord() { |
| record.setFields(fields); |
| return context.complete(record); |
| } |
| |
| private FieldAssembler<R> addField(Field field) { |
| fields.add(field); |
| return this; |
| } |
| |
| } |
| |
| /** |
| * Builds a Field in the context of a {@link FieldAssembler}. |
| * |
| * Usage is to first configure any of the optional parameters and then to call one |
| * of the type methods to complete the field. For example |
| * <pre> |
| * .namespace("org.apache.example").orderDecending().type() |
| * </pre> |
| * Optional parameters for a field are namespace, doc, order, and aliases. |
| */ |
| public final static class FieldBuilder<R> extends |
| NamedBuilder<FieldBuilder<R>> { |
| private final FieldAssembler<R> fields; |
| private Schema.Field.Order order = Schema.Field.Order.ASCENDING; |
| |
| private FieldBuilder(FieldAssembler<R> fields, NameContext names, String name) { |
| super(names, name); |
| this.fields = fields; |
| } |
| |
| /** Set this field to have ascending order. Ascending is the default **/ |
| public FieldBuilder<R> orderAscending() { |
| order = Schema.Field.Order.ASCENDING; |
| return self(); |
| } |
| |
| /** Set this field to have decending order. Decending is the default **/ |
| public FieldBuilder<R> orderDescending() { |
| order = Schema.Field.Order.DESCENDING; |
| return self(); |
| } |
| |
| /** Set this field to ignore order. **/ |
| public FieldBuilder<R> orderIgnore() { |
| order = Schema.Field.Order.IGNORE; |
| return self(); |
| } |
| |
| /** |
| * Final step in configuring this field, finalizing name, namespace, alias, |
| * and order. |
| * @return A builder for the field's type and default value. |
| */ |
| public FieldTypeBuilder<R> type() { |
| return new FieldTypeBuilder<R>(this); |
| } |
| |
| /** |
| * Final step in configuring this field, finalizing name, namespace, alias, |
| * and order. Sets the field's type to the provided schema, returns a |
| * {@link GenericDefault}. |
| */ |
| public GenericDefault<R> type(Schema type) { |
| return new GenericDefault<R>(this, type); |
| } |
| |
| /** |
| * Final step in configuring this field, finalizing name, namespace, alias, |
| * and order. Sets the field's type to the schema by name reference. |
| * <p/> |
| * The name must correspond with a named schema that has already been |
| * created in the context of this builder. The name may be a fully qualified |
| * name, or a short name. If it is a short name, the namespace context of |
| * this builder will be used. |
| * <p/> |
| * The name and namespace context rules are the same as the Avro schema JSON |
| * specification. |
| */ |
| public GenericDefault<R> type(String name) { |
| return type(name, null); |
| } |
| |
| /** |
| * Final step in configuring this field, finalizing name, namespace, alias, |
| * and order. Sets the field's type to the schema by name reference. |
| * <p/> |
| * The name must correspond with a named schema that has already been |
| * created in the context of this builder. The name may be a fully qualified |
| * name, or a short name. If it is a full name, the namespace is ignored. If |
| * it is a short name, the namespace provided is used. If the namespace |
| * provided is null, the namespace context of this builder will be used. |
| * <p/> |
| * The name and namespace context rules are the same as the Avro schema JSON |
| * specification. |
| */ |
| public GenericDefault<R> type(String name, String namespace) { |
| Schema schema = names().get(name, namespace); |
| return type(schema); |
| } |
| |
| private FieldAssembler<R> completeField(Schema schema, Object defaultVal) { |
| JsonNode defaultNode = toJsonNode(defaultVal); |
| return completeField(schema, defaultNode); |
| } |
| |
| private FieldAssembler<R> completeField(Schema schema) { |
| return completeField(schema, null); |
| } |
| |
| private FieldAssembler<R> completeField(Schema schema, JsonNode defaultVal) { |
| Field field = new Field(name(), schema, doc(), defaultVal, order); |
| addPropsTo(field); |
| addAliasesTo(field); |
| return fields.addField(field); |
| } |
| |
| @Override |
| protected FieldBuilder<R> self() { |
| return this; |
| } |
| } |
| |
| /** Abstract base class for field defaults. **/ |
| public static abstract class FieldDefault<R, S extends FieldDefault<R, S>> extends Completion<S> { |
| private final FieldBuilder<R> field; |
| private Schema schema; |
| FieldDefault(FieldBuilder<R> field) { |
| this.field = field; |
| } |
| |
| /** Completes this field with no default value **/ |
| public final FieldAssembler<R> noDefault() { |
| return field.completeField(schema); |
| } |
| |
| private FieldAssembler<R> usingDefault(Object defaultVal) { |
| return field.completeField(schema, defaultVal); |
| } |
| |
| @Override |
| final S complete(Schema schema) { |
| this.schema = schema; |
| return self(); |
| } |
| |
| abstract S self(); |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class BooleanDefault<R> extends FieldDefault<R, BooleanDefault<R>> { |
| private BooleanDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided **/ |
| public final FieldAssembler<R> booleanDefault(boolean defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final BooleanDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class IntDefault<R> extends FieldDefault<R, IntDefault<R>> { |
| private IntDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided **/ |
| public final FieldAssembler<R> intDefault(int defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final IntDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class LongDefault<R> extends FieldDefault<R, LongDefault<R>> { |
| private LongDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided **/ |
| public final FieldAssembler<R> longDefault(long defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final LongDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class FloatDefault<R> extends FieldDefault<R, FloatDefault<R>> { |
| private FloatDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided **/ |
| public final FieldAssembler<R> floatDefault(float defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final FloatDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class DoubleDefault<R> extends FieldDefault<R, DoubleDefault<R>> { |
| private DoubleDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided **/ |
| public final FieldAssembler<R> doubleDefault(double defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final DoubleDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class StringDefault<R> extends FieldDefault<R, StringDefault<R>> { |
| private StringDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided. Cannot be null. **/ |
| public final FieldAssembler<R> stringDefault(String defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final StringDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class BytesDefault<R> extends FieldDefault<R, BytesDefault<R>> { |
| private BytesDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final FieldAssembler<R> bytesDefault(byte[] defaultVal) { |
| return super.usingDefault(ByteBuffer.wrap(defaultVal)); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final FieldAssembler<R> bytesDefault(ByteBuffer defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null. |
| * The string is interpreted as a byte[], with each character code point |
| * value equalling the byte value, as in the Avro spec JSON default. **/ |
| public final FieldAssembler<R> bytesDefault(String defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final BytesDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class NullDefault<R> extends FieldDefault<R, NullDefault<R>> { |
| private NullDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with a default value of null **/ |
| public final FieldAssembler<R> nullDefault() { |
| return super.usingDefault(null); |
| } |
| |
| @Override |
| final NullDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class MapDefault<R> extends FieldDefault<R, MapDefault<R>> { |
| private MapDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final <K, V> FieldAssembler<R> mapDefault(Map<K, V> defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final MapDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class ArrayDefault<R> extends FieldDefault<R, ArrayDefault<R>> { |
| private ArrayDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final <V> FieldAssembler<R> arrayDefault(List<V> defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final ArrayDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class FixedDefault<R> extends FieldDefault<R, FixedDefault<R>> { |
| private FixedDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final FieldAssembler<R> fixedDefault(byte[] defaultVal) { |
| return super.usingDefault(ByteBuffer.wrap(defaultVal)); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final FieldAssembler<R> fixedDefault(ByteBuffer defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null. |
| * The string is interpreted as a byte[], with each character code point |
| * value equalling the byte value, as in the Avro spec JSON default. **/ |
| public final FieldAssembler<R> fixedDefault(String defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final FixedDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class EnumDefault<R> extends FieldDefault<R, EnumDefault<R>> { |
| private EnumDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final FieldAssembler<R> enumDefault(String defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final EnumDefault<R> self() { |
| return this; |
| } |
| } |
| |
| /** Choose whether to use a default value for the field or not. **/ |
| public static class RecordDefault<R> extends FieldDefault<R, RecordDefault<R>> { |
| private RecordDefault(FieldBuilder<R> field) { |
| super(field); |
| } |
| |
| /** Completes this field with the default value provided, cannot be null **/ |
| public final FieldAssembler<R> recordDefault(GenericRecord defaultVal) { |
| return super.usingDefault(defaultVal); |
| } |
| |
| @Override |
| final RecordDefault<R> self() { |
| return this; |
| } |
| } |
| |
| public final static class GenericDefault<R> { |
| private final FieldBuilder<R> field; |
| private final Schema schema; |
| private GenericDefault(FieldBuilder<R> field, Schema schema) { |
| this.field = field; |
| this.schema = schema; |
| } |
| |
| /** Do not use a default value for this field. **/ |
| public FieldAssembler<R> noDefault() { |
| return field.completeField(schema); |
| } |
| |
| /** Completes this field with the default value provided. |
| * The value must conform to the schema of the field. **/ |
| public FieldAssembler<R> withDefault(Object defaultVal) { |
| return field.completeField(schema, defaultVal); |
| } |
| } |
| |
| /** |
| * Completion<R> is for internal builder use, all subclasses are private. |
| * |
| * Completion is an object that takes a Schema and returns some result. |
| */ |
| private abstract static class Completion<R> { |
| abstract R complete(Schema schema); |
| } |
| |
| private static class SchemaCompletion extends Completion<Schema> { |
| @Override |
| protected Schema complete(Schema schema) { |
| return schema; |
| } |
| } |
| |
| private static final Schema NULL_SCHEMA = Schema.create(Schema.Type.NULL); |
| |
| private static class NullableCompletion<R> extends Completion<R> { |
| private final Completion<R> context; |
| private NullableCompletion(Completion<R> context) { |
| this.context = context; |
| } |
| @Override |
| protected R complete(Schema schema) { |
| // wrap the schema as a union of the schema and null |
| Schema nullable = Schema.createUnion(Arrays.asList(schema, NULL_SCHEMA)); |
| return context.complete(nullable); |
| } |
| } |
| |
| private static class OptionalCompletion<R> extends Completion<FieldAssembler<R>> { |
| private final FieldBuilder<R> bldr; |
| public OptionalCompletion(FieldBuilder<R> bldr) { |
| this.bldr = bldr; |
| } |
| @Override |
| protected FieldAssembler<R> complete(Schema schema) { |
| // wrap the schema as a union of null and the schema |
| Schema optional = Schema.createUnion(Arrays.asList(NULL_SCHEMA, schema)); |
| return bldr.completeField(optional, (Object)null); |
| } |
| } |
| |
| private abstract static class CompletionWrapper { |
| abstract <R> Completion<R> wrap(Completion<R> completion); |
| } |
| |
| private static final class NullableCompletionWrapper extends CompletionWrapper { |
| @Override |
| <R> Completion<R> wrap(Completion<R> completion) { |
| return new NullableCompletion<R>(completion); |
| } |
| } |
| |
| private static abstract class NestedCompletion<R> extends Completion<R> { |
| private final Completion<R> context; |
| private final PropBuilder<?> assembler; |
| |
| private NestedCompletion(PropBuilder<?> assembler, Completion<R> context) { |
| this.context = context; |
| this.assembler = assembler; |
| } |
| |
| @Override |
| protected final R complete(Schema schema) { |
| Schema outer = outerSchema(schema); |
| assembler.addPropsTo(outer); |
| return context.complete(outer); |
| } |
| |
| protected abstract Schema outerSchema(Schema inner); |
| } |
| |
| private static class MapCompletion<R> extends NestedCompletion<R> { |
| private MapCompletion(MapBuilder<R> assembler, Completion<R> context) { |
| super(assembler, context); |
| } |
| |
| @Override |
| protected Schema outerSchema(Schema inner) { |
| return Schema.createMap(inner); |
| } |
| } |
| |
| private static class ArrayCompletion<R> extends NestedCompletion<R> { |
| private ArrayCompletion(ArrayBuilder<R> assembler, Completion<R> context) { |
| super(assembler, context); |
| } |
| |
| @Override |
| protected Schema outerSchema(Schema inner) { |
| return Schema.createArray(inner); |
| } |
| } |
| |
| private static class UnionCompletion<R> extends |
| Completion<UnionAccumulator<R>> { |
| private final Completion<R> context; |
| private final NameContext names; |
| private final List<Schema> schemas; |
| |
| private UnionCompletion(Completion<R> context, NameContext names, List<Schema> schemas) { |
| this.context = context; |
| this.names = names; |
| this.schemas = schemas; |
| } |
| |
| @Override |
| protected UnionAccumulator<R> complete(Schema schema) { |
| List<Schema> updated = new ArrayList<Schema>(this.schemas); |
| updated.add(schema); |
| return new UnionAccumulator<R>(context, names, updated); |
| } |
| } |
| |
| /** Accumulates all of the types in a union. Add an additional type with |
| * {@link #and()}. Complete the union with {@link #endUnion()} |
| */ |
| public static final class UnionAccumulator<R> { |
| private final Completion<R> context; |
| private final NameContext names; |
| private final List<Schema> schemas; |
| |
| private UnionAccumulator(Completion<R> context, NameContext names, List<Schema> schemas) { |
| this.context = context; |
| this.names = names; |
| this.schemas = schemas; |
| } |
| |
| /** Add an additional type to this union **/ |
| public BaseTypeBuilder<UnionAccumulator<R>> and() { |
| return new UnionBuilder<R>(context, names, schemas); |
| } |
| |
| /** Complete this union **/ |
| public R endUnion() { |
| Schema schema = Schema.createUnion(schemas); |
| return context.complete(schema); |
| } |
| } |
| |
| private static void checkRequired(Object reference, String errorMessage) { |
| if (reference == null) { |
| throw new NullPointerException(errorMessage); |
| } |
| } |
| |
| // create default value JsonNodes from objects |
| private static JsonNode toJsonNode(Object o) { |
| try { |
| String s; |
| if (o instanceof ByteBuffer) { |
| // special case since GenericData.toString() is incorrect for bytes |
| // note that this does not handle the case of a default value with nested bytes |
| ByteBuffer bytes = ((ByteBuffer) o); |
| bytes.mark(); |
| byte[] data = new byte[bytes.remaining()]; |
| bytes.get(data); |
| bytes.reset(); // put the buffer back the way we got it |
| s = new String(data, "ISO-8859-1"); |
| char[] quoted = JsonStringEncoder.getInstance().quoteAsString(s); |
| s = "\"" + new String(quoted) + "\""; |
| } else { |
| s = GenericData.get().toString(o); |
| } |
| return new ObjectMapper().readTree(s); |
| } catch (IOException e) { |
| throw new SchemaBuilderException(e); |
| } |
| } |
| } |