| /* |
| * 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.flink.formats.json; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.common.serialization.SerializationSchema; |
| import org.apache.flink.formats.common.TimestampFormat; |
| import org.apache.flink.table.data.RowData; |
| import org.apache.flink.table.types.logical.RowType; |
| import org.apache.flink.util.jackson.JacksonMapperFactory; |
| |
| import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonGenerator; |
| import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper; |
| import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.ObjectNode; |
| |
| import java.util.Objects; |
| |
| /** |
| * Serialization schema that serializes an object of Flink internal data structure into a JSON |
| * bytes. |
| * |
| * <p>Serializes the input Flink object into a JSON string and converts it into <code>byte[]</code>. |
| * |
| * <p>Result <code>byte[]</code> messages can be deserialized using {@link |
| * JsonRowDataDeserializationSchema}. |
| */ |
| @Internal |
| public class JsonRowDataSerializationSchema implements SerializationSchema<RowData> { |
| private static final long serialVersionUID = 1L; |
| |
| /** RowType to generate the runtime converter. */ |
| private final RowType rowType; |
| |
| /** The converter that converts internal data formats to JsonNode. */ |
| private final RowDataToJsonConverters.RowDataToJsonConverter runtimeConverter; |
| |
| /** Object mapper that is used to create output JSON objects. */ |
| private transient ObjectMapper mapper; |
| |
| /** Reusable object node. */ |
| private transient ObjectNode node; |
| |
| /** Timestamp format specification which is used to parse timestamp. */ |
| private final TimestampFormat timestampFormat; |
| |
| /** The handling mode when serializing null keys for map data. */ |
| private final JsonFormatOptions.MapNullKeyMode mapNullKeyMode; |
| |
| /** The string literal when handling mode for map null key LITERAL. */ |
| private final String mapNullKeyLiteral; |
| |
| /** Flag indicating whether to serialize all decimals as plain numbers. */ |
| private final boolean encodeDecimalAsPlainNumber; |
| |
| public JsonRowDataSerializationSchema( |
| RowType rowType, |
| TimestampFormat timestampFormat, |
| JsonFormatOptions.MapNullKeyMode mapNullKeyMode, |
| String mapNullKeyLiteral, |
| boolean encodeDecimalAsPlainNumber) { |
| this.rowType = rowType; |
| this.timestampFormat = timestampFormat; |
| this.mapNullKeyMode = mapNullKeyMode; |
| this.mapNullKeyLiteral = mapNullKeyLiteral; |
| this.encodeDecimalAsPlainNumber = encodeDecimalAsPlainNumber; |
| this.runtimeConverter = |
| new RowDataToJsonConverters(timestampFormat, mapNullKeyMode, mapNullKeyLiteral) |
| .createConverter(rowType); |
| } |
| |
| @Override |
| public void open(InitializationContext context) throws Exception { |
| mapper = |
| JacksonMapperFactory.createObjectMapper() |
| .configure( |
| JsonGenerator.Feature.WRITE_BIGDECIMAL_AS_PLAIN, |
| encodeDecimalAsPlainNumber); |
| } |
| |
| @Override |
| public byte[] serialize(RowData row) { |
| if (node == null) { |
| node = mapper.createObjectNode(); |
| } |
| |
| try { |
| runtimeConverter.convert(mapper, node, row); |
| return mapper.writeValueAsBytes(node); |
| } catch (Throwable t) { |
| throw new RuntimeException(String.format("Could not serialize row '%s'.", row), t); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| JsonRowDataSerializationSchema that = (JsonRowDataSerializationSchema) o; |
| return rowType.equals(that.rowType) |
| && timestampFormat.equals(that.timestampFormat) |
| && mapNullKeyMode.equals(that.mapNullKeyMode) |
| && mapNullKeyLiteral.equals(that.mapNullKeyLiteral) |
| && encodeDecimalAsPlainNumber == that.encodeDecimalAsPlainNumber; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash( |
| rowType, |
| timestampFormat, |
| mapNullKeyMode, |
| mapNullKeyLiteral, |
| encodeDecimalAsPlainNumber); |
| } |
| } |