001/*
002 * Copyright © 2025 CUI-OpenSource-Software (info@cuioss.de)
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package de.cuioss.test.generator.internal.net.java.quickcheck.generator.support;
017
018import de.cuioss.test.generator.internal.net.java.quickcheck.Generator;
019
020import java.lang.reflect.Array;
021import java.util.List;
022import java.util.Objects;
023
024public class ArrayGenerator<T> extends AbstractTransformerGenerator<List<T>, T[]> {
025
026    public static final int MAX_SIZE = ListGenerator.MAX_SIZE;
027    public static final int MIN_SIZE = ListGenerator.MIN_SIZE;
028
029    private T[] emptyArrayOfT;
030
031    public ArrayGenerator(Generator<? extends T> content, Class<T> type) {
032        super(new ListGenerator<>(content));
033        setEmptyArrayOfT(type);
034    }
035
036    public ArrayGenerator(Generator<? extends T> content, Generator<Integer> size, Class<T> type) {
037        super(new ListGenerator<>(content, size));
038        setEmptyArrayOfT(type);
039    }
040
041    private void setEmptyArrayOfT(Class<T> type) {
042        Objects.requireNonNull(type, "content type");
043        this.emptyArrayOfT = emptyArrayOfT(type);
044    }
045
046    @Override
047    protected T[] transform(Generator<List<T>> inputGenerator) {
048        return inputGenerator.next().toArray(emptyArrayOfT);
049    }
050
051    @SuppressWarnings("unchecked")
052    private T[] emptyArrayOfT(Class<T> type) {
053        return (T[]) Array.newInstance(type, 0);
054    }
055}