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A library for unit-tests to check the dependencies between classes.
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package de.spricom.dessert.slicing;

/*-
 * #%L
 * Dessert Dependency Assertion Library for Java
 * %%
 * Copyright (C) 2017 - 2023 Hans Jörg Heßmann
 * %%
 * Licensed 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.
 * #L%
 */

import de.spricom.dessert.matching.NamePattern;
import de.spricom.dessert.resolve.ClassEntry;
import de.spricom.dessert.resolve.ClassVisitor;
import de.spricom.dessert.resolve.ResolveException;
import de.spricom.dessert.resolve.TraversalRoot;

import java.util.Collections;
import java.util.Set;
import java.util.TreeSet;

final class NamePatternClazzResolver extends AbstractClazzResolver implements ClassVisitor {
    private final NamePattern pattern;
    private final TraversalRoot root;
    private final Set additionalPatterns;

    NamePatternClazzResolver(Classpath cp, NamePattern pattern, TraversalRoot root) {
        this(cp, pattern, root, Collections.emptySet());
    }

    private NamePatternClazzResolver(Classpath cp, NamePattern pattern, TraversalRoot root,
                                     Set additionalPatterns) {
        super(cp);
        this.pattern = pattern;
        this.root = root;
        this.additionalPatterns = additionalPatterns;
    }

    @Override
    protected void resolve() {
        root.traverse(pattern, this);
    }

    @Override
    public void visit(ClassEntry ce) {
        for (NamePattern additionalPattern : additionalPatterns) {
            if (!additionalPattern.matches(ce.getClassname())) {
                return;
            }
        }
        add(ce);
    }

    @Override
    public Set getClazzes() {
        Set clazzes = super.getClazzes();
        if (clazzes.isEmpty() && pattern.isAny()) {
            throw new ResolveException("No classes found in " + root);
        }
        return clazzes;
    }

    public NamePatternClazzResolver filtered(NamePattern additionalPattern) {
        TreeSet patterns = new TreeSet(additionalPatterns);
        if (additionalPattern.isMoreConcreteThan(pattern)) {
            patterns.add(pattern);
            return new NamePatternClazzResolver(getClasspath(), additionalPattern, root, patterns);
        } else {
            patterns.add(additionalPattern);
            return new NamePatternClazzResolver(getClasspath(), pattern, root, patterns);
        }
    }

    public NamePatternClazzResolver replace(NamePattern replacementPattern) {
        return new NamePatternClazzResolver(getClasspath(), replacementPattern, root);
    }
}