| /** |
| * 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.pulsar.client.impl.schema; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.google.gson.GsonBuilder; |
| import com.google.gson.JsonDeserializationContext; |
| import com.google.gson.JsonDeserializer; |
| import com.google.gson.JsonElement; |
| import com.google.gson.JsonObject; |
| import com.google.gson.JsonParseException; |
| import com.google.gson.JsonParser; |
| import com.google.gson.JsonPrimitive; |
| import com.google.gson.JsonSerializationContext; |
| import com.google.gson.JsonSerializer; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.ByteBufAllocator; |
| import io.netty.buffer.ByteBufUtil; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Type; |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| import java.util.Base64; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.SortedMap; |
| import java.util.TreeMap; |
| |
| import org.apache.pulsar.client.internal.DefaultImplementation; |
| import org.apache.pulsar.common.schema.KeyValue; |
| import org.apache.pulsar.common.schema.SchemaInfo; |
| import org.apache.pulsar.common.schema.SchemaInfoWithVersion; |
| import org.apache.pulsar.common.schema.SchemaType; |
| import org.apache.pulsar.common.util.ObjectMapperFactory; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| |
| /** |
| * Utils for schemas. |
| */ |
| public final class SchemaUtils { |
| |
| private static final byte[] KEY_VALUE_SCHEMA_IS_PRIMITIVE = new byte[0]; |
| |
| private static final String KEY_VALUE_SCHEMA_NULL_STRING = "\"\""; |
| |
| private SchemaUtils() {} |
| |
| /** |
| * Keeps a map between {@link SchemaType} to a list of java classes that can be used to represent them. |
| */ |
| private static final Map<SchemaType, List<Class>> SCHEMA_TYPE_CLASSES = new HashMap<>(); |
| |
| /** |
| * Maps the java classes to the corresponding {@link SchemaType}. |
| */ |
| private static final Map<Class<?>, SchemaType> JAVA_CLASS_SCHEMA_TYPES = new HashMap<>(); |
| |
| static { |
| // int8 |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.INT8, |
| Arrays.asList(Byte.class)); |
| // int16 |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.INT16, |
| Arrays.asList(Short.class)); |
| // int32 |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.INT32, |
| Arrays.asList(Integer.class)); |
| // int64 |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.INT64, |
| Arrays.asList(Long.class)); |
| // float |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.FLOAT, |
| Arrays.asList(Float.class)); |
| // double |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.DOUBLE, |
| Arrays.asList(Double.class)); |
| // boolean |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.BOOLEAN, |
| Arrays.asList(Boolean.class)); |
| // string |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.STRING, |
| Arrays.asList(String.class)); |
| // bytes |
| SCHEMA_TYPE_CLASSES.put( |
| SchemaType.BYTES, |
| Arrays.asList(byte[].class, ByteBuffer.class, ByteBuf.class)); |
| // build the reverse mapping |
| SCHEMA_TYPE_CLASSES.forEach( |
| (type, classes) -> classes.forEach(clz -> JAVA_CLASS_SCHEMA_TYPES.put(clz, type))); |
| } |
| |
| public static void validateFieldSchema(String name, |
| SchemaType type, |
| Object val) { |
| if (null == val) { |
| return; |
| } |
| |
| List<Class> expectedClasses = SCHEMA_TYPE_CLASSES.get(type); |
| |
| if (null == expectedClasses) { |
| throw new RuntimeException("Invalid Java object for schema type " + type |
| + " : " + val.getClass() |
| + " for field : \"" + name + "\""); |
| } |
| |
| boolean foundMatch = false; |
| for (Class<?> expectedCls : expectedClasses) { |
| if (expectedCls.isInstance(val)) { |
| foundMatch = true; |
| break; |
| } |
| } |
| |
| if (!foundMatch) { |
| throw new RuntimeException("Invalid Java object for schema type " + type |
| + " : " + val.getClass() |
| + " for field : \"" + name + "\""); |
| } |
| |
| switch (type) { |
| case INT8: |
| case INT16: |
| case PROTOBUF: |
| case AVRO: |
| case AUTO_CONSUME: |
| case AUTO_PUBLISH: |
| case AUTO: |
| case KEY_VALUE: |
| case JSON: |
| case NONE: |
| throw new RuntimeException("Currently " + type.name() + " is not supported"); |
| default: |
| break; |
| } |
| } |
| |
| public static Object toAvroObject(Object value) { |
| if (value != null) { |
| if (value instanceof ByteBuffer) { |
| ByteBuffer bb = (ByteBuffer) value; |
| byte[] bytes = new byte[bb.remaining()]; |
| bb.duplicate().get(bytes); |
| return bytes; |
| } else if (value instanceof ByteBuf) { |
| return ByteBufUtil.getBytes((ByteBuf) value); |
| } else { |
| return value; |
| } |
| } else { |
| return null; |
| } |
| } |
| |
| public static String getStringSchemaVersion(byte[] schemaVersionBytes) { |
| if (null == schemaVersionBytes) { |
| return "NULL"; |
| } else if ( |
| // the length of schema version is 8 bytes post 2.4.0 |
| schemaVersionBytes.length == Long.BYTES |
| // the length of schema version is 64 bytes before 2.4.0 |
| || schemaVersionBytes.length == Long.SIZE) { |
| ByteBuffer bb = ByteBuffer.wrap(schemaVersionBytes); |
| return String.valueOf(bb.getLong()); |
| } else if (schemaVersionBytes.length == 0) { |
| return "EMPTY"; |
| } else { |
| return Base64.getEncoder().encodeToString(schemaVersionBytes); |
| } |
| |
| } |
| |
| /** |
| * Jsonify the schema info. |
| * |
| * @param schemaInfo the schema info |
| * @return the jsonified schema info |
| */ |
| public static String jsonifySchemaInfo(SchemaInfo schemaInfo) { |
| GsonBuilder gsonBuilder = new GsonBuilder() |
| .setPrettyPrinting() |
| .registerTypeHierarchyAdapter(byte[].class, new ByteArrayToStringAdapter(schemaInfo)) |
| .registerTypeHierarchyAdapter(Map.class, SCHEMA_PROPERTIES_SERIALIZER); |
| |
| return gsonBuilder.create().toJson(schemaInfo); |
| } |
| |
| /** |
| * Jsonify the schema info with verison. |
| * |
| * @param schemaInfoWithVersion the schema info |
| * @return the jsonified schema info with version |
| */ |
| public static String jsonifySchemaInfoWithVersion(SchemaInfoWithVersion schemaInfoWithVersion) { |
| GsonBuilder gsonBuilder = new GsonBuilder() |
| .setPrettyPrinting() |
| .registerTypeHierarchyAdapter(SchemaInfo.class, SCHEMAINFO_ADAPTER) |
| .registerTypeHierarchyAdapter(Map.class, SCHEMA_PROPERTIES_SERIALIZER); |
| |
| return gsonBuilder.create().toJson(schemaInfoWithVersion); |
| } |
| |
| private static class SchemaPropertiesSerializer implements JsonSerializer<Map<String, String>> { |
| |
| @Override |
| public JsonElement serialize(Map<String, String> properties, |
| Type type, |
| JsonSerializationContext jsonSerializationContext) { |
| SortedMap<String, String> sortedProperties = new TreeMap<>(); |
| sortedProperties.putAll(properties); |
| JsonObject object = new JsonObject(); |
| sortedProperties.forEach((key, value) -> { |
| object.add(key, (value != null) ? new JsonPrimitive(value) : null); |
| }); |
| return object; |
| } |
| |
| } |
| |
| private static class SchemaPropertiesDeserializer implements JsonDeserializer<Map<String, String>> { |
| |
| @Override |
| public Map<String, String> deserialize(JsonElement jsonElement, |
| Type type, |
| JsonDeserializationContext jsonDeserializationContext) |
| throws JsonParseException { |
| |
| SortedMap<String, String> sortedProperties = new TreeMap<>(); |
| jsonElement.getAsJsonObject().entrySet().forEach(entry -> sortedProperties.put( |
| entry.getKey(), |
| entry.getValue().getAsString() |
| )); |
| return sortedProperties; |
| } |
| |
| } |
| |
| private static final SchemaPropertiesSerializer SCHEMA_PROPERTIES_SERIALIZER = |
| new SchemaPropertiesSerializer(); |
| |
| private static final SchemaPropertiesDeserializer SCHEMA_PROPERTIES_DESERIALIZER = |
| new SchemaPropertiesDeserializer(); |
| |
| private static class ByteArrayToStringAdapter implements JsonSerializer<byte[]> { |
| |
| private final SchemaInfo schemaInfo; |
| |
| public ByteArrayToStringAdapter(SchemaInfo schemaInfo) { |
| this.schemaInfo = schemaInfo; |
| } |
| |
| public JsonElement serialize(byte[] src, Type typeOfSrc, JsonSerializationContext context) { |
| String schemaDef = schemaInfo.getSchemaDefinition(); |
| SchemaType type = schemaInfo.getType(); |
| switch (type) { |
| case AVRO: |
| case JSON: |
| case PROTOBUF: |
| return toJsonObject(schemaInfo.getSchemaDefinition()); |
| case KEY_VALUE: |
| KeyValue<SchemaInfo, SchemaInfo> schemaInfoKeyValue = |
| DefaultImplementation.decodeKeyValueSchemaInfo(schemaInfo); |
| JsonObject obj = new JsonObject(); |
| String keyJson = jsonifySchemaInfo(schemaInfoKeyValue.getKey()); |
| String valueJson = jsonifySchemaInfo(schemaInfoKeyValue.getValue()); |
| obj.add("key", toJsonObject(keyJson)); |
| obj.add("value", toJsonObject(valueJson)); |
| return obj; |
| default: |
| return new JsonPrimitive(schemaDef); |
| } |
| } |
| } |
| |
| public static JsonObject toJsonObject(String json) { |
| JsonParser parser = new JsonParser(); |
| return parser.parse(json).getAsJsonObject(); |
| } |
| |
| private static class SchemaInfoToStringAdapter implements JsonSerializer<SchemaInfo> { |
| |
| @Override |
| public JsonElement serialize(SchemaInfo schemaInfo, |
| Type type, |
| JsonSerializationContext jsonSerializationContext) { |
| return toJsonObject(jsonifySchemaInfo(schemaInfo)); |
| } |
| } |
| |
| private static final SchemaInfoToStringAdapter SCHEMAINFO_ADAPTER = new SchemaInfoToStringAdapter(); |
| |
| /** |
| * Jsonify the key/value schema info. |
| * |
| * @param kvSchemaInfo the key/value schema info |
| * @return the jsonified schema info |
| */ |
| public static String jsonifyKeyValueSchemaInfo(KeyValue<SchemaInfo, SchemaInfo> kvSchemaInfo) { |
| GsonBuilder gsonBuilder = new GsonBuilder() |
| .registerTypeHierarchyAdapter(SchemaInfo.class, SCHEMAINFO_ADAPTER) |
| .registerTypeHierarchyAdapter(Map.class, SCHEMA_PROPERTIES_SERIALIZER); |
| return gsonBuilder.create().toJson(kvSchemaInfo); |
| } |
| |
| /** |
| * convert the key/value schema info data to string |
| * |
| * @param kvSchemaInfo the key/value schema info |
| * @return the convert schema info data string |
| */ |
| public static String convertKeyValueSchemaInfoDataToString(KeyValue<SchemaInfo, SchemaInfo> kvSchemaInfo) throws IOException { |
| ObjectMapper objectMapper = ObjectMapperFactory.create(); |
| KeyValue<Object, Object> keyValue = new KeyValue<>(SchemaType.isPrimitiveType(kvSchemaInfo.getKey().getType()) ? "" |
| : objectMapper.readTree(kvSchemaInfo.getKey().getSchema()), SchemaType.isPrimitiveType(kvSchemaInfo.getValue().getType()) ? |
| "" : objectMapper.readTree(kvSchemaInfo.getValue().getSchema())); |
| return objectMapper.writeValueAsString(keyValue); |
| } |
| |
| private static byte[] getKeyOrValueSchemaBytes(JsonElement jsonElement) { |
| return KEY_VALUE_SCHEMA_NULL_STRING.equals(jsonElement.toString()) ? |
| KEY_VALUE_SCHEMA_IS_PRIMITIVE : jsonElement.toString().getBytes(UTF_8); |
| } |
| |
| /** |
| * convert the key/value schema info data json bytes to key/value schema info data bytes |
| * |
| * @param keyValueSchemaInfoDataJsonBytes the key/value schema info data json bytes |
| * @return the key/value schema info data bytes |
| */ |
| public static byte[] convertKeyValueDataStringToSchemaInfoSchema(byte[] keyValueSchemaInfoDataJsonBytes) throws IOException { |
| JsonObject jsonObject = toJsonObject(new String(keyValueSchemaInfoDataJsonBytes, UTF_8)); |
| byte[] keyBytes = getKeyOrValueSchemaBytes(jsonObject.get("key")); |
| byte[] valueBytes = getKeyOrValueSchemaBytes(jsonObject.get("value")); |
| int dataLength = 4 + keyBytes.length + 4 + valueBytes.length; |
| byte[] schema = new byte[dataLength]; |
| //record the key value schema respective length |
| ByteBuf byteBuf = ByteBufAllocator.DEFAULT.heapBuffer(dataLength); |
| byteBuf.writeInt(keyBytes.length).writeBytes(keyBytes).writeInt(valueBytes.length).writeBytes(valueBytes); |
| byteBuf.readBytes(schema); |
| return schema; |
| } |
| |
| /** |
| * Serialize schema properties |
| * |
| * @param properties schema properties |
| * @return the serialized schema properties |
| */ |
| public static String serializeSchemaProperties(Map<String, String> properties) { |
| GsonBuilder gsonBuilder = new GsonBuilder() |
| .registerTypeHierarchyAdapter(Map.class, SCHEMA_PROPERTIES_SERIALIZER); |
| return gsonBuilder.create().toJson(properties); |
| } |
| |
| /** |
| * Deserialize schema properties from a serialized schema properties. |
| * |
| * @param serializedProperties serialized properties |
| * @return the deserialized properties |
| */ |
| public static Map<String, String> deserializeSchemaProperties(String serializedProperties) { |
| GsonBuilder gsonBuilder = new GsonBuilder() |
| .registerTypeHierarchyAdapter(Map.class, SCHEMA_PROPERTIES_DESERIALIZER); |
| return gsonBuilder.create().fromJson(serializedProperties, Map.class); |
| } |
| |
| } |