org.basepom.mojo.dvc.QualifiedNameMatcher Maven / Gradle / Ivy

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The dependency-versions-check plugin verifies that all resolved versions of artifacts are at least the versions specified by the project dependencies. The Maven dependency resolution process will substitute versions for the different artifacts in a dependency tree and sometimes chooses incompatible versions which leads to difficult to detect problems. This plugin resolves all dependencies and collects any requested version. It evaluates whether the resolved versions are compatible to the requested versions and reports possible conflicts.

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/*
 * 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.
 */

package org.basepom.mojo.dvc;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;

import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Splitter;

/**
 * Matches the group-id/artifact-id pair of a qualified name. May contain wildcards (*) in either group-id and artifact-id.
 */
public final class QualifiedNameMatcher {

    private static final Pattern WILDCARD_REGEXP = Pattern.compile("[^*]+|(\\*)");
    private static final Pattern WILDCARD_MATCH = Pattern.compile(".*");

    private final Pattern groupPattern;
    private final Pattern artifactPattern;

    public static QualifiedNameMatcher fromQualifiedName(final QualifiedName name) {
        checkNotNull(name, "name is null");

        return new QualifiedNameMatcher(name.getMinimalName());
    }

    public QualifiedNameMatcher(final String pattern) {
        checkNotNull(pattern, "pattern is null");
        final List elements = Splitter.on(':').trimResults().splitToList(pattern);
        checkState(!elements.isEmpty() && elements.size() < 3, "Pattern %s is not a valid inclusion pattern!", pattern);

        this.groupPattern = compileWildcard(elements.get(0).trim());
        this.artifactPattern = compileWildcard(elements.size() > 1 ? elements.get(1).trim() : ""); // use wildcard match if no artifact present
    }

    public boolean matches(QualifiedName artifactName) {
        checkNotNull(artifactName, "artifactName is null");

        return groupPattern.matcher(artifactName.getGroupId()).matches()
                && artifactPattern.matcher(artifactName.getArtifactId()).matches();
    }

    @VisibleForTesting
    static Pattern compileWildcard(final String wildcard) {
        if (wildcard.isEmpty()) {
            return WILDCARD_MATCH;
        }

        final Matcher m = WILDCARD_REGEXP.matcher(wildcard);
        final StringBuffer b = new StringBuffer();
        while (m.find()) {
            if (m.group(1) != null) {
                m.appendReplacement(b, ".*");
            } else {
                m.appendReplacement(b, "\\\\Q" + m.group(0) + "\\\\E");
            }
        }
        m.appendTail(b);
        return Pattern.compile(b.toString());
    }
}