| /* |
| * 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.kafka.message; |
| |
| import java.util.Optional; |
| |
| public interface FieldType { |
| String ARRAY_PREFIX = "[]"; |
| |
| final class BoolFieldType implements FieldType { |
| static final BoolFieldType INSTANCE = new BoolFieldType(); |
| private static final String NAME = "bool"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Boolean"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(1); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class Int8FieldType implements FieldType { |
| static final Int8FieldType INSTANCE = new Int8FieldType(); |
| private static final String NAME = "int8"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Byte"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(1); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class Int16FieldType implements FieldType { |
| static final Int16FieldType INSTANCE = new Int16FieldType(); |
| private static final String NAME = "int16"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Short"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(2); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class Uint16FieldType implements FieldType { |
| static final Uint16FieldType INSTANCE = new Uint16FieldType(); |
| private static final String NAME = "uint16"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Integer"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(2); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class Int32FieldType implements FieldType { |
| static final Int32FieldType INSTANCE = new Int32FieldType(); |
| private static final String NAME = "int32"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Integer"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(4); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class Uint32FieldType implements FieldType { |
| static final Uint32FieldType INSTANCE = new Uint32FieldType(); |
| private static final String NAME = "uint32"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Long"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(4); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class Int64FieldType implements FieldType { |
| static final Int64FieldType INSTANCE = new Int64FieldType(); |
| private static final String NAME = "int64"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Long"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(8); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class UUIDFieldType implements FieldType { |
| static final UUIDFieldType INSTANCE = new UUIDFieldType(); |
| private static final String NAME = "uuid"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| headerGenerator.addImport(MessageGenerator.UUID_CLASS); |
| return "Uuid"; |
| } |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(16); |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class Float64FieldType implements FieldType { |
| static final Float64FieldType INSTANCE = new Float64FieldType(); |
| private static final String NAME = "float64"; |
| |
| @Override |
| public Optional<Integer> fixedLength() { |
| return Optional.of(8); |
| } |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "Double"; |
| } |
| |
| @Override |
| public boolean isFloat() { |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class StringFieldType implements FieldType { |
| static final StringFieldType INSTANCE = new StringFieldType(); |
| private static final String NAME = "string"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return "String"; |
| } |
| |
| @Override |
| public boolean serializationIsDifferentInFlexibleVersions() { |
| return true; |
| } |
| |
| @Override |
| public boolean isString() { |
| return true; |
| } |
| |
| @Override |
| public boolean canBeNullable() { |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class BytesFieldType implements FieldType { |
| static final BytesFieldType INSTANCE = new BytesFieldType(); |
| private static final String NAME = "bytes"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| headerGenerator.addImport(MessageGenerator.BYTE_BUFFER_CLASS); |
| return "ByteBuffer"; |
| } |
| |
| @Override |
| public boolean serializationIsDifferentInFlexibleVersions() { |
| return true; |
| } |
| |
| @Override |
| public boolean isBytes() { |
| return true; |
| } |
| |
| @Override |
| public boolean canBeNullable() { |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class RecordsFieldType implements FieldType { |
| static final RecordsFieldType INSTANCE = new RecordsFieldType(); |
| private static final String NAME = "records"; |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| headerGenerator.addImport(MessageGenerator.BASE_RECORDS_CLASS); |
| return "BaseRecords"; |
| } |
| |
| @Override |
| public boolean serializationIsDifferentInFlexibleVersions() { |
| return true; |
| } |
| |
| @Override |
| public boolean isRecords() { |
| return true; |
| } |
| |
| @Override |
| public boolean canBeNullable() { |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return NAME; |
| } |
| } |
| |
| final class StructType implements FieldType { |
| private final String type; |
| |
| StructType(String type) { |
| this.type = type; |
| } |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| return type; |
| } |
| |
| @Override |
| public boolean serializationIsDifferentInFlexibleVersions() { |
| return true; |
| } |
| |
| @Override |
| public boolean isStruct() { |
| return true; |
| } |
| |
| public String typeName() { |
| return type; |
| } |
| |
| @Override |
| public String toString() { |
| return type; |
| } |
| } |
| |
| final class ArrayType implements FieldType { |
| private final FieldType elementType; |
| |
| ArrayType(FieldType elementType) { |
| this.elementType = elementType; |
| } |
| |
| @Override |
| public boolean serializationIsDifferentInFlexibleVersions() { |
| return true; |
| } |
| |
| @Override |
| public String getBoxedJavaType(HeaderGenerator headerGenerator) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean isArray() { |
| return true; |
| } |
| |
| @Override |
| public boolean isStructArray() { |
| return elementType.isStruct(); |
| } |
| |
| @Override |
| public boolean canBeNullable() { |
| return true; |
| } |
| |
| public FieldType elementType() { |
| return elementType; |
| } |
| |
| public String elementName() { |
| return elementType.toString(); |
| } |
| |
| @Override |
| public String toString() { |
| return "[]" + elementType.toString(); |
| } |
| } |
| |
| static FieldType parse(String string) { |
| string = string.trim(); |
| switch (string) { |
| case BoolFieldType.NAME: |
| return BoolFieldType.INSTANCE; |
| case Int8FieldType.NAME: |
| return Int8FieldType.INSTANCE; |
| case Int16FieldType.NAME: |
| return Int16FieldType.INSTANCE; |
| case Uint16FieldType.NAME: |
| return Uint16FieldType.INSTANCE; |
| case Uint32FieldType.NAME: |
| return Uint32FieldType.INSTANCE; |
| case Int32FieldType.NAME: |
| return Int32FieldType.INSTANCE; |
| case Int64FieldType.NAME: |
| return Int64FieldType.INSTANCE; |
| case UUIDFieldType.NAME: |
| return UUIDFieldType.INSTANCE; |
| case Float64FieldType.NAME: |
| return Float64FieldType.INSTANCE; |
| case StringFieldType.NAME: |
| return StringFieldType.INSTANCE; |
| case BytesFieldType.NAME: |
| return BytesFieldType.INSTANCE; |
| case RecordsFieldType.NAME: |
| return RecordsFieldType.INSTANCE; |
| default: |
| if (string.startsWith(ARRAY_PREFIX)) { |
| String elementTypeString = string.substring(ARRAY_PREFIX.length()); |
| if (elementTypeString.length() == 0) { |
| throw new RuntimeException("Can't parse array type " + string + |
| ". No element type found."); |
| } |
| FieldType elementType = parse(elementTypeString); |
| if (elementType.isArray()) { |
| throw new RuntimeException("Can't have an array of arrays. " + |
| "Use an array of structs containing an array instead."); |
| } |
| return new ArrayType(elementType); |
| } else if (MessageGenerator.firstIsCapitalized(string)) { |
| return new StructType(string); |
| } else { |
| throw new RuntimeException("Can't parse type " + string); |
| } |
| } |
| } |
| |
| String getBoxedJavaType(HeaderGenerator headerGenerator); |
| |
| /** |
| * Returns true if this is an array type. |
| */ |
| default boolean isArray() { |
| return false; |
| } |
| |
| /** |
| * Returns true if this is an array of structures. |
| */ |
| default boolean isStructArray() { |
| return false; |
| } |
| |
| /** |
| * Returns true if the serialization of this type is different in flexible versions. |
| */ |
| default boolean serializationIsDifferentInFlexibleVersions() { |
| return false; |
| } |
| |
| /** |
| * Returns true if this is a string type. |
| */ |
| default boolean isString() { |
| return false; |
| } |
| |
| /** |
| * Returns true if this is a bytes type. |
| */ |
| default boolean isBytes() { |
| return false; |
| } |
| |
| /** |
| * Returns true if this is a records type |
| */ |
| default boolean isRecords() { |
| return false; |
| } |
| |
| /** |
| * Returns true if this is a floating point type. |
| */ |
| default boolean isFloat() { |
| return false; |
| } |
| |
| /** |
| * Returns true if this is a struct type. |
| */ |
| default boolean isStruct() { |
| return false; |
| } |
| |
| /** |
| * Returns true if this field type is compatible with nullability. |
| */ |
| default boolean canBeNullable() { |
| return false; |
| } |
| |
| /** |
| * Gets the fixed length of the field, or None if the field is variable-length. |
| */ |
| default Optional<Integer> fixedLength() { |
| return Optional.empty(); |
| } |
| |
| default boolean isVariableLength() { |
| return !fixedLength().isPresent(); |
| } |
| |
| /** |
| * Convert the field type to a JSON string. |
| */ |
| String toString(); |
| } |