org.mobicents.maven.plugin.utils.ProjectUtils.java Source code

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Here is the source code for org.mobicents.maven.plugin.utils.ProjectUtils.java

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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.maven.plugin.utils;

import java.io.File;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.logging.Log;
import org.apache.maven.profiles.DefaultProfileManager;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.MavenProjectBuilder;
import org.apache.maven.project.ProjectBuildingException;

/**
 * Contains ulitities for dealing with Maven projects.
 *
 * @author Chad Brandon
 */
public class ProjectUtils {
    /**
     * Stores previously discovered projects.
     */
    private static final Map projectCache = new HashMap();

    /**
     * Gets a project for the given <code>pom</code>.
     *
     * @param pom the pom from which to build the project.
     * @return the built project.
     * @throws ProjectBuildingException
     */
    public static synchronized MavenProject getProject(final MavenProjectBuilder projectBuilder,
            final MavenSession session, final File pom, final Log logger) throws ProjectBuildingException {
        // - first attempt to get a project from the cache
        MavenProject project = (MavenProject) projectCache.get(pom);
        if (project == null) {
            // - next attempt to get the existing project from the session
            project = getProjectFromSession(session, pom);
            if (project == null) {
                // - if we didn't find it in the session, create it
                try {
                    project = projectBuilder.build(pom, session.getLocalRepository(),
                            new DefaultProfileManager(session.getContainer()));
                    projectCache.put(pom, project);
                } catch (Exception ex) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Failed to build project from pom: " + pom, ex);
                    }
                }
            }
        }
        return project;
    }

    /**
     * The POM file name.
     */
    private static final String POM_FILE = "pom.xml";

    /**
     * Attempts to retrieve the Maven project for the given <code>pom</code>.
     *
     * @param pom the POM to find.
     * @return the maven project with the matching POM.
     */
    private static MavenProject getProjectFromSession(final MavenSession session, final File pom) {
        MavenProject foundProject = null;
        for (final Iterator projectIterator = session.getSortedProjects().iterator(); projectIterator.hasNext();) {
            final MavenProject project = (MavenProject) projectIterator.next();
            final File projectPom = new File(project.getBasedir(), POM_FILE);
            if (projectPom.equals(pom)) {
                foundProject = project;
            }
        }
        return foundProject;
    }
}