/*
* 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.api.java.operators.translation;
import org.apache.flink.annotation.Internal;
import org.apache.flink.api.common.functions.FilterFunction;
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.common.operators.UnaryOperatorInformation;
import org.apache.flink.api.common.operators.base.FilterOperatorBase;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.java.functions.FunctionAnnotation.ForwardedFields;
import org.apache.flink.util.Collector;
@Internal
@ForwardedFields("*")
public class PlanFilterOperator<T> extends FilterOperatorBase<T, FlatMapFunction<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 FlatMapFunction<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);
}
}
}
}