IdentityMap.java example

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/***********************************************************************************************************************
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * Licensed 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 eu.stratosphere.pact.compiler.util;

import java.io.Serializable;

import eu.stratosphere.api.java.record.functions.FunctionAnnotation.ConstantFieldsExcept;
import eu.stratosphere.api.java.record.functions.MapFunction;
import eu.stratosphere.types.Record;
import eu.stratosphere.util.Collector;

@ConstantFieldsExcept({})
public final class IdentityMap extends MapFunction implements Serializable {
	private static final long serialVersionUID = 1L;
	
	@Override
	public void map(Record record, Collector<Record> out) throws Exception {
		out.collect(record);
	}
}