001/*
002 * Licensed to the author under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package de.cuioss.test.generator.internal.net.java.quickcheck.generator.support;
018
019import java.util.Objects;
020
021import de.cuioss.test.generator.internal.net.java.quickcheck.Generator;
022
023/**
024 * {@link Generator} implementation that transforms input generator test cases
025 * of type I to output test cases of type T.
026 *
027 * @param <I> input generator test case type
028 * @param <T> output generator test case type
029 *
030 */
031public abstract class AbstractTransformerGenerator<I, T> implements Generator<T> {
032
033    private Generator<I> inputGenerator;
034
035    protected AbstractTransformerGenerator(Generator<I> inputGenerator) {
036        setInputGenerator(inputGenerator);
037    }
038
039    protected abstract T transform(Generator<I> inputGenerator);
040
041    @Override
042    public T next() {
043        return transform(inputGenerator);
044    }
045
046    Generator<I> getInputGenerator() {
047        return inputGenerator;
048    }
049
050    void setInputGenerator(Generator<I> inputGenerator) {
051        Objects.requireNonNull(inputGenerator, "inputGenerator");
052        this.inputGenerator = inputGenerator;
053    }
054}