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.ExtendibleGenerator;
019import de.cuioss.test.generator.internal.net.java.quickcheck.FrequencyGenerator;
020import de.cuioss.test.generator.internal.net.java.quickcheck.Generator;
021
022import java.util.Objects;
023
024public class StringGenerator implements ExtendibleGenerator<Character, String> {
025
026    public static final int MIN_LENGTH = 0;
027
028    public static final int MAX_LENGTH = 30;
029
030    private final FrequencyGenerator<Character> characters;
031    private final Generator<Integer> length;
032
033    public StringGenerator() {
034        this(new CharacterGenerator());
035    }
036
037    public StringGenerator(char first, char last) {
038        this(new CharacterGenerator(first, last));
039    }
040
041    public StringGenerator(Generator<Character> characters) {
042        this(new IntegerGenerator(MIN_LENGTH, MAX_LENGTH), characters);
043    }
044
045    public StringGenerator(Generator<Integer> length, Generator<Character> characters) {
046        Objects.requireNonNull(length, "length");
047
048        this.length = length;
049        this.characters = new DefaultFrequencyGenerator<>(characters);
050    }
051
052    @Override
053    public String next() {
054        int size = length.next();
055        StringBuilder builder = new StringBuilder();
056        for (int count = 0; count < size; count++) {
057            builder.append(characters.next());
058        }
059        return builder.toString();
060    }
061
062    @Override
063    public ExtendibleGenerator<Character, String> add(Generator<Character> characterGenerator) {
064        characters.add(characterGenerator);
065        return this;
066    }
067}