/***********************************************************************************************************************
*
* 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.api.java.operators.translation;
import eu.stratosphere.api.common.functions.GenericFlatMap;
import eu.stratosphere.api.common.operators.UnaryOperatorInformation;
import eu.stratosphere.api.common.operators.base.FilterOperatorBase;
import eu.stratosphere.api.java.functions.FilterFunction;
import eu.stratosphere.types.TypeInformation;
import eu.stratosphere.util.Collector;
public class PlanFilterOperator<T> extends FilterOperatorBase<T, GenericFlatMap<T, T>> {
public PlanFilterOperator(FilterFunction<T> udf, String name, TypeInformation<T> type) {
super(new FlatMapFilter<T>(udf), new UnaryOperatorInformation<T, T>(type, type), name);
}
public static final class FlatMapFilter<T> extends WrappingFunction<FilterFunction<T>>
implements GenericFlatMap<T, T>
{
private static final long serialVersionUID = 1L;
private FlatMapFilter(FilterFunction<T> wrapped) {
super(wrapped);
}
@Override
public final void flatMap(T value, Collector<T> out) throws Exception {
if (this.wrappedFunction.filter(value)) {
out.collect(value);
}
}
}
}