/*
* 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.storm.util;
import org.apache.storm.tuple.Tuple;
public class SimpleOutputFormatter implements OutputFormatter {
private static final long serialVersionUID = 6349573860144270338L;
/**
* Converts a Storm {@link Tuple} with 1 field to a string by retrieving the value of that field. This method is
* used for formatting raw outputs wrapped in tuples, before writing them out to a file or to the console.
*
* @param input
* The tuple to be formatted
* @return The string result of the formatting
*/
@Override
public String format(final Tuple input) {
if (input.getValues().size() != 1) {
throw new RuntimeException("The output is not raw");
}
return input.getValue(0).toString();
}
}