001/*
002 * Copyright 2023 the original author or authors.
003 * <p>
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 * <p>
008 * https://www.apache.org/licenses/LICENSE-2.0
009 * <p>
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.impl;
017
018import static de.cuioss.test.generator.Generators.nonEmptyStrings;
019
020import de.cuioss.test.generator.TypedGenerator;
021
022/**
023 * Provide any {@link String} which is not empty and not blank.
024 */
025public class NonBlankStringGenerator implements TypedGenerator<String> {
026
027    private static final TypedGenerator<String> SOME_NONEMPTY_STRING = nonEmptyStrings();
028
029    @Override
030    public Class<String> getType() {
031        return String.class;
032    }
033
034    @Override
035    public String next() {
036        var tries = 0;
037        while (tries < 100) {
038            tries++;
039            var candidate = SOME_NONEMPTY_STRING.next();
040            if (!candidate.trim().isEmpty()) {
041                return candidate;
042            }
043        }
044        throw new IllegalStateException("Could not generate non blank string after %d tries".formatted(tries));
045    }
046
047}