org.apache.flink.formats.protobuf.serialize.PbCodegenMapSerializer Maven / Gradle / Ivy
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* 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.protobuf.serialize;
import org.apache.flink.formats.protobuf.PbCodegenAppender;
import org.apache.flink.formats.protobuf.PbCodegenException;
import org.apache.flink.formats.protobuf.PbCodegenUtils;
import org.apache.flink.formats.protobuf.PbCodegenVarId;
import org.apache.flink.formats.protobuf.PbConstant;
import org.apache.flink.table.types.logical.LogicalType;
import org.apache.flink.table.types.logical.MapType;
import com.google.protobuf.Descriptors;
public class PbCodegenMapSerializer implements PbCodegenSerializer {
private Descriptors.FieldDescriptor fd;
private MapType mapType;
public PbCodegenMapSerializer(Descriptors.FieldDescriptor fd, MapType mapType) {
this.fd = fd;
this.mapType = mapType;
}
@Override
public String codegen(String returnVarName, String rowFieldGetStr) throws PbCodegenException {
PbCodegenVarId varUid = PbCodegenVarId.getInstance();
int uid = varUid.getAndIncrement();
LogicalType keyType = mapType.getKeyType();
LogicalType valueType = mapType.getValueType();
Descriptors.FieldDescriptor keyFd =
fd.getMessageType().findFieldByName(PbConstant.PB_MAP_KEY_NAME);
Descriptors.FieldDescriptor valueFd =
fd.getMessageType().findFieldByName(PbConstant.PB_MAP_VALUE_NAME);
PbCodegenAppender appender = new PbCodegenAppender();
String keyProtoTypeStr = PbCodegenUtils.getTypeStrFromProto(keyFd, false);
String valueProtoTypeStr = PbCodegenUtils.getTypeStrFromProto(valueFd, false);
String keyArrDataVar = "keyArrData" + uid;
String valueArrDataVar = "valueArrData" + uid;
String iVar = "i" + uid;
String pbMapVar = "resultPbMap" + uid;
String keyPbVar = "keyPbVar" + uid;
String valuePbVar = "valuePbVar" + uid;
String keyDataVar = "keyDataVar" + uid;
String valueDataVar = "valueDataVar" + uid;
appender.appendLine("ArrayData " + keyArrDataVar + " = " + rowFieldGetStr + ".keyArray()");
appender.appendLine(
"ArrayData " + valueArrDataVar + " = " + rowFieldGetStr + ".valueArray()");
appender.appendLine(
"Map<"
+ keyProtoTypeStr
+ ", "
+ valueProtoTypeStr
+ "> "
+ pbMapVar
+ " = new HashMap()");
appender.appendSegment(
"for(int "
+ iVar
+ " = 0; "
+ iVar
+ " < "
+ keyArrDataVar
+ ".size(); "
+ iVar
+ "++){");
// process key
String keyGenCode =
PbCodegenUtils.generateArrElementCodeWithDefaultValue(
keyArrDataVar, iVar, keyPbVar, keyDataVar, keyFd, keyType);
appender.appendSegment(keyGenCode);
// process value
String valueGenCode =
PbCodegenUtils.generateArrElementCodeWithDefaultValue(
valueArrDataVar, iVar, valuePbVar, valueDataVar, valueFd, valueType);
appender.appendSegment(valueGenCode);
appender.appendLine(pbMapVar + ".put(" + keyPbVar + ", " + valuePbVar + ")");
appender.appendSegment("}");
appender.appendLine(returnVarName + " = " + pbMapVar);
return appender.code();
}
}