/*
* 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
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*/
package org.elasticsearch.storm.serialization;
import org.elasticsearch.hadoop.serialization.JdkBytesConverter;
import org.elasticsearch.hadoop.util.Assert;
import org.elasticsearch.hadoop.util.BytesArray;
import backtype.storm.tuple.Tuple;
public class StormTupleBytesConverter extends JdkBytesConverter {
@Override
public void convert(Object from, BytesArray to) {
Assert.isTrue(from == null || from instanceof Tuple,
String.format("Unexpected object type, expecting [%s], given [%s]", Tuple.class, from.getClass()));
// handle common cases
Tuple tuple = (Tuple) from;
if (tuple == null || tuple.size() == 0) {
to.bytes("{}");
return;
}
Assert.isTrue(tuple.size() == 1, "When using JSON input, only one field is expected");
super.convert(tuple.getValue(0), to);
}
}