org.eclipse.m2e.editor.composites.ParentGatherer.java Source code

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Here is the source code for org.eclipse.m2e.editor.composites.ParentGatherer.java

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/*******************************************************************************
 * Copyright (c) 2010 Sonatype, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *      Sonatype, Inc. - initial API and implementation
 *******************************************************************************/

package org.eclipse.m2e.editor.composites;

import java.util.LinkedList;

import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.project.MavenProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.m2e.core.MavenPlugin;
import org.eclipse.m2e.core.embedder.IMaven;
import org.eclipse.m2e.core.project.IMavenProjectFacade;
import org.eclipse.m2e.core.project.MavenProjectManager;

/**
 * Helper class to get the parent chain given a pom 
 */
public class ParentGatherer {
    private MavenProject mavenProject;

    private IMavenProjectFacade projectFacade;

    public ParentGatherer(MavenProject leafProject, IMavenProjectFacade facade) {
        this.mavenProject = leafProject;
        this.projectFacade = facade;
    }

    /**
     * Return the list of parents for a give pom
     * @param monitor
     * @return list of {@link MavenProject} from the given project to its ultimate parent. 
     * The first entry is the given pom, the last one the ultimate parent.
     * @throws CoreException
     */
    public LinkedList<MavenProject> getParentHierarchy(IProgressMonitor monitor) throws CoreException {
        LinkedList<MavenProject> hierarchy = new LinkedList<MavenProject>();
        IMaven maven = MavenPlugin.getDefault().getMaven();
        MavenProjectManager projectManager = MavenPlugin.getDefault().getMavenProjectManager();
        maven.detachFromSession(mavenProject);

        hierarchy.add(mavenProject);

        MavenProject project = mavenProject;
        while (project.getModel().getParent() != null) {
            if (monitor.isCanceled()) {
                return null;
            }
            MavenExecutionRequest request = projectManager.createExecutionRequest(projectFacade, monitor);
            project = maven.resolveParentProject(request, project, monitor);
            hierarchy.add(project);
        }
        return hierarchy;
    }
}