/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.storm.serialization;
import org.elasticsearch.hadoop.serialization.Generator;
import org.elasticsearch.hadoop.serialization.builder.JdkValueWriter;
import org.elasticsearch.hadoop.serialization.builder.ValueWriter;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
public class StormValueWriter implements ValueWriter<Tuple> {
private final ValueWriter<Object> jdkWriter;
public StormValueWriter() {
this(false);
}
public StormValueWriter(boolean writeUnknownTypes) {
jdkWriter = new JdkValueWriter(writeUnknownTypes);
}
@Override
public boolean write(Tuple tuple, Generator generator) {
Fields fields = tuple.getFields();
generator.writeBeginObject();
for (String field : fields) {
generator.writeFieldName(field);
Object value = tuple.getValueByField(field);
if (value instanceof Tuple) {
if (!write((Tuple) value, generator)) {
return false;
}
}
else if (!jdkWriter.write(value, generator)) {
return false;
}
}
generator.writeEndObject();
return true;
}
}