org.eclipse.buckminster.jdt.internal.BMClasspathInitializer.java Source code

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Here is the source code for org.eclipse.buckminster.jdt.internal.BMClasspathInitializer.java

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/*******************************************************************************
 * Copyright (c) 2004, 2005
 * Thomas Hallgren, Kenneth Olwing, Mitch Sonies
 * Pontus Rydin, Nils Unden, Peer Torngren
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the individual
 * copyright holders listed above, as Initial Contributors under such license.
 * The text of such license is available at www.eclipse.org.
 *******************************************************************************/
package org.eclipse.buckminster.jdt.internal;

import org.eclipse.buckminster.jdt.JdtPlugin;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.ClasspathContainerInitializer;
import org.eclipse.jdt.core.IClasspathContainer;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaModel;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;

/**
 * 
 */
public class BMClasspathInitializer extends ClasspathContainerInitializer implements IResourceChangeListener {
    /**
     * Constructor for RequiredPluginsInitializer.
     */
    public BMClasspathInitializer() {
        super();
        ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.PRE_BUILD);
    }

    /**
     * @see org.eclipse.jdt.core.ClasspathContainerInitializer#initialize(IPath,
     *      IJavaProject)
     */
    @Override
    public void initialize(IPath containerPath, IJavaProject javaProject) throws CoreException {
        if (javaProject == null || !BMClasspathContainer.PATH.isPrefixOf(containerPath))
            return;

        String targetDesignator = null;
        if (containerPath.segmentCount() == 2)
            targetDesignator = containerPath.lastSegment();

        IProject project = javaProject.getProject();
        BMClasspathContainer newCP = new BMClasspathContainer(project, targetDesignator);
        IClasspathContainer oldCP = JavaCore.getClasspathContainer(containerPath, javaProject);
        if (newCP.equals(oldCP))
            return;

        JavaCore.setClasspathContainer(containerPath, new IJavaProject[] { javaProject },
                new IClasspathContainer[] { newCP }, null);
        JdtPlugin.getLogger().debug("%s container initialized for project %s", containerPath, project.getName()); //$NON-NLS-1$
    }

    @Override
    public void resourceChanged(IResourceChangeEvent event) {
        IPath path = BMClasspathContainer.PATH;
        try {
            IJavaModel model = JavaCore.create(ResourcesPlugin.getWorkspace().getRoot());
            for (IJavaProject javaProject : model.getJavaProjects()) {
                for (IClasspathEntry rawEntry : javaProject.readRawClasspath()) {
                    if (rawEntry.getEntryKind() == IClasspathEntry.CPE_CONTAINER) {
                        IPath entryPath = rawEntry.getPath();
                        if (path.isPrefixOf(entryPath)) {
                            this.initialize(entryPath, javaProject);
                            return;
                        }
                    }
                }
            }
        } catch (JavaModelException e) {
            e.printStackTrace();
        } catch (CoreException e) {
            e.printStackTrace();
        }
    }
}