com.google.gdt.eclipse.core.sdk.ClasspathContainerUpdateJob.java Source code

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Here is the source code for com.google.gdt.eclipse.core.sdk.ClasspathContainerUpdateJob.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * 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 com.google.gdt.eclipse.core.sdk;

import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jdt.core.ClasspathContainerInitializer;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.internal.launching.LaunchingMessages;

/**
 * Job used to update any {@link IClasspathEntry#CPE_CONTAINER} entries whose
 * comparison ID matches the expected comparison ID.
 */
@SuppressWarnings("restriction")
public class ClasspathContainerUpdateJob extends Job {
    private final String expectedComparisonId;
    private final ClasspathContainerInitializer classpathContainerInitializer;

    public ClasspathContainerUpdateJob(String jobName, String expectedContainerId) {
        super(jobName);
        assert (expectedContainerId != null);
        assert (expectedContainerId.trim().length() != 0);

        this.expectedComparisonId = expectedContainerId;
        classpathContainerInitializer = JavaCore.getClasspathContainerInitializer(expectedContainerId);
        assert (classpathContainerInitializer != null);
    }

    @Override
    protected IStatus run(IProgressMonitor jobMonitor) {
        try {
            IWorkspaceRunnable runnable = new IWorkspaceRunnable() {
                public void run(IProgressMonitor runnableMonitor) throws CoreException {
                    IJavaProject[] projects = JavaCore.create(ResourcesPlugin.getWorkspace().getRoot())
                            .getJavaProjects();
                    runnableMonitor.beginTask(LaunchingMessages.LaunchingPlugin_0, projects.length + 1);
                    rebindContainers(runnableMonitor, projects);
                    runnableMonitor.done();
                }

                /**
                 * Rebind all of the classpath containers whose comparison ID matches
                 * the expected ID.
                 */
                private void rebindContainers(IProgressMonitor runnableMonitor, IJavaProject[] projects)
                        throws CoreException {
                    for (IJavaProject project : projects) {
                        // Update the progress monitor
                        runnableMonitor.worked(1);
                        IClasspathEntry[] rawClasspathEntries = project.getRawClasspath();
                        for (IClasspathEntry rawClasspathEntry : rawClasspathEntries) {
                            if (rawClasspathEntry.getEntryKind() != IClasspathEntry.CPE_CONTAINER) {
                                continue;
                            }

                            IPath path = rawClasspathEntry.getPath();
                            if (path == null || path.segmentCount() == 0) {
                                continue;
                            }

                            Object actualComparisonId = classpathContainerInitializer.getComparisonID(path,
                                    project);
                            if (!actualComparisonId.equals(expectedComparisonId)) {
                                continue;
                            }

                            classpathContainerInitializer.initialize(path, project);
                        }
                    }
                }
            };
            JavaCore.run(runnable, null, jobMonitor);
            return Status.OK_STATUS;
        } catch (CoreException e) {
            return e.getStatus();
        }
    }
}