io.sarl.m2e.M2EUtilities.java Source code

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Here is the source code for io.sarl.m2e.M2EUtilities.java

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/*
 * $Id$
 *
 * SARL is an general-purpose agent programming language.
 * More details on http://www.sarl.io
 *
 * Copyright (C) 2014-2016 the original authors or authors.
 *
 * 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 io.sarl.m2e;

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

import com.google.common.base.Strings;
import org.apache.maven.artifact.Artifact;
import org.osgi.framework.Version;

/**
 * M2E utilities.
 *
 * @author $Author: sgalland$
 * @version $FullVersion$
 * @mavengroupid $GroupId$
 * @mavenartifactid $ArtifactId$
 */
public final class M2EUtilities {

    /** The qualifier string that is representing a snapshot version
     * in the OGSi framework.
     */
    public static final String SNAPSHOT_QUALIFIER = "qualifier"; //$NON-NLS-1$

    /** The pattern that is matching a SNAPSHOT version.
     */
    public static final Pattern SNAPSHOT_VERSION_PATTERN = Pattern.compile("^(.*)" //$NON-NLS-1$
            + Pattern.quote("-" + Artifact.SNAPSHOT_VERSION) //$NON-NLS-1$
            + "$"); //$NON-NLS-1$

    private M2EUtilities() {
        //
    }

    /** Maven version parser.
     *
     * @param version - the version string.
     * @return the version.
     */
    public static Version parseMavenVersion(String version) {
        if (Strings.isNullOrEmpty(version)) {
            return new Version(0, 0, 0);
        }

        // Detect the snapshot
        boolean isSnapshot;
        String coreVersion;
        Matcher matcher = Artifact.VERSION_FILE_PATTERN.matcher(version);
        if (matcher.matches()) {
            coreVersion = matcher.group(1);
            isSnapshot = true;
        } else {
            matcher = SNAPSHOT_VERSION_PATTERN.matcher(version);
            if (matcher.matches()) {
                coreVersion = matcher.group(1);
                isSnapshot = true;
            } else {
                coreVersion = version;
                isSnapshot = false;
            }
        }

        // Parse the numbers
        String[] parts = coreVersion.split("[.]"); //$NON-NLS-1$
        int[] numbers = new int[] { 0, 0, 0 };
        for (int i = 0; i < numbers.length && i < parts.length; ++i) {
            try {
                int value = Integer.parseInt(parts[i]);
                numbers[i] = value;
            } catch (Exception exception) {
                // Force the exit of the loop since a number cannot be find.
                i = numbers.length;
            }
        }
        // Reply
        if (isSnapshot) {
            return new Version(numbers[0], numbers[1], numbers[2], SNAPSHOT_QUALIFIER);
        }
        return new Version(numbers[0], numbers[1], numbers[2]);
    }

}