com.google.cloud.tools.eclipse.appengine.facets.FacetUninstallDelegate.java Source code

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Here is the source code for com.google.cloud.tools.eclipse.appengine.facets.FacetUninstallDelegate.java

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/*******************************************************************************
 * Copyright 2016 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.cloud.tools.eclipse.appengine.facets;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.wst.common.project.facet.core.IDelegate;
import org.eclipse.wst.common.project.facet.core.IFacetedProject;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;
import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager;
import org.eclipse.wst.common.project.facet.core.runtime.IRuntime;
import com.google.cloud.tools.eclipse.util.MavenUtils;

import java.util.Set;

public class FacetUninstallDelegate implements IDelegate {

    @Override
    public void execute(IProject project, IProjectFacetVersion version, Object config, IProgressMonitor monitor)
            throws CoreException {
        // TODO: what is the complete scenario for maven project?
        // https://github.com/GoogleCloudPlatform/gcloud-eclipse-tools/issues/504
        if (!MavenUtils.hasMavenNature(project)) { // Maven handles classpath in maven projects.
            SubMonitor subMonitor = SubMonitor.convert(monitor, 100);
            removeAppEngineJarsFromClasspath(project, subMonitor.newChild(50));
            uninstallAppEngineRuntime(project, subMonitor.newChild(50));
        }
    }

    private void removeAppEngineJarsFromClasspath(IProject project, IProgressMonitor monitor) throws CoreException {
        IJavaProject javaProject = JavaCore.create(project);
        IClasspathEntry[] rawClasspath = javaProject.getRawClasspath();
        IClasspathEntry[] newClasspath = new IClasspathEntry[rawClasspath.length - 1];

        int appEngineContainerIndex = 0;
        boolean isAppEngineSdkPresent = false;
        for (IClasspathEntry entry : rawClasspath) {
            if (AppEngineSdkClasspathContainer.CONTAINER_ID.equals(entry.getPath().toString())) {
                isAppEngineSdkPresent = true;
            } else {
                newClasspath[appEngineContainerIndex++] = entry;
            }
        }

        if (isAppEngineSdkPresent) {
            javaProject.setRawClasspath(newClasspath, monitor);
        }
    }

    /**
     * Removes all the App Engine server runtimes from the list of targeted runtimes for
     * <code>project</code>.
     */
    private void uninstallAppEngineRuntime(final IProject project, IProgressMonitor monitor) {
        Job uninstallJob = new Job("Uninstall App Engine runtimes in " + project.getName()) {

            @Override
            protected IStatus run(IProgressMonitor monitor) {
                try {
                    IFacetedProject facetedProject = ProjectFacetsManager.create(project);
                    Set<IRuntime> targetedRuntimes = facetedProject.getTargetedRuntimes();

                    for (IRuntime targetedRuntime : targetedRuntimes) {
                        if (AppEngineStandardFacet.isAppEngineStandardRuntime(targetedRuntime)) {
                            facetedProject.removeTargetedRuntime(targetedRuntime, monitor);
                        }
                    }
                    return Status.OK_STATUS;
                } catch (CoreException ex) {
                    return ex.getStatus();
                }
            }
        };
        uninstallJob.schedule();

    }
}