wayang-platforms/wayang-spark/src/main/java/org/apache/wayang/spark/compiler/PredicateAdapter.java

/*
 * 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.wayang.spark.compiler;

import java.util.function.Predicate;
import org.apache.spark.api.java.function.Function;

/**
 * Wraps a {@link Predicate} as a {@link Function}.
 */
public class PredicateAdapter<InputType> implements Function<InputType, Boolean> {

    private Predicate<InputType> predicate;

    public PredicateAdapter(Predicate<InputType> predicate) {
        this.predicate = predicate;
    }

    @Override
    public Boolean call(InputType dataQuantum) throws Exception {
        return this.predicate.test(dataQuantum);
    }
}