org.apache.flink.formats.protobuf.deserialize.PbCodegenSimpleDeserializer Maven / Gradle / Ivy
/*
* 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.deserialize;
import com.google.protobuf.Descriptors;
public class PbCodegenSimpleDeserializer implements PbCodegenDeserializer {
private Descriptors.FieldDescriptor fd;
public PbCodegenSimpleDeserializer(Descriptors.FieldDescriptor fd) {
this.fd = fd;
}
@Override
public String codegen(String returnVarName, String messageGetStr) {
// the type of messageGetStr must not be primitive type,
// it should convert to internal flink row type like StringData.
StringBuilder sb = new StringBuilder();
switch (fd.getJavaType()) {
case INT:
case LONG:
case FLOAT:
case DOUBLE:
case BOOLEAN:
sb.append(returnVarName + " = " + messageGetStr + ";");
break;
case BYTE_STRING:
sb.append(returnVarName + " = " + messageGetStr + ".toByteArray();");
break;
case STRING:
case ENUM:
sb.append(
returnVarName
+ " = BinaryStringData.fromString("
+ messageGetStr
+ ".toString());");
break;
}
return sb.toString();
}
}