src/plugins/android/src/com/motorola/studio/android/command/CleanProjects.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.motorola.studio.android.command;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IncrementalProjectBuilder;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
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.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

import com.motorola.studio.android.common.log.StudioLogger;
import com.motorola.studio.android.i18n.AndroidNLS;

/**
 * Handler responsible for cleaning selected projects by the user. 
 */
public class CleanProjects extends AbstractHandler
{

    /**
     * Job responsible for cleaning a list of projects
     */
    private final class CleanProjectsJob extends Job
    {

        private List<IProject> projectList = null;

        /**
         * @param name
         * @param stream 
         * @param sdkPath 
         */
        private CleanProjectsJob(List<IProject> projects)
        {
            super(AndroidNLS.UI_CleanProjectsJob_Name);
            projectList = projects;
        }

        @Override
        protected IStatus run(IProgressMonitor monitor)
        {
            monitor.beginTask(AndroidNLS.UI_CleanProjectsJob_Description, projectList.size());

            for (IProject p : projectList)
            {
                // Try to clean it and update progress
                try
                {
                    p.build(IncrementalProjectBuilder.CLEAN_BUILD, monitor);
                    monitor.worked(1);
                }
                catch (CoreException e)
                {
                    // Just log the error. Not much we can do about it.
                    StudioLogger.error(CleanProjectsJob.class,
                            "Error cleaning project " + p.getName() + ". ", e);
                }
            }

            monitor.done();
            return Status.OK_STATUS;
        }
    }

    /* (non-Javadoc)
     * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
     */
    public Object execute(ExecutionEvent event) throws ExecutionException
    {

        // Retrieve the selection used in the command
        IWorkbench workbench = PlatformUI.getWorkbench();
        if ((workbench != null) && !workbench.isClosing())
        {
            IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();
            if (window != null)
            {
                ISelection selection = window.getSelectionService().getSelection();
                if (selection instanceof IStructuredSelection)
                {
                    IStructuredSelection sselection = (IStructuredSelection) selection;
                    Iterator<?> it = sselection.iterator();

                    // Construct a list of valid projects to be cleaned
                    List<IProject> projectList = new ArrayList<IProject>(sselection.size());

                    while (it.hasNext())
                    {
                        Object resource = it.next();

                        // Check if the selected item is a project
                        if (resource instanceof IProject)
                        {
                            projectList.add(((IProject) resource));
                        }
                        else if (resource instanceof IAdaptable)
                        {
                            IAdaptable adaptable = (IAdaptable) resource;
                            projectList.add((IProject) adaptable.getAdapter(IProject.class));

                        }

                    }

                    // Instantiate the clean job and schedule it.
                    if (projectList.size() > 0)
                    {
                        CleanProjectsJob job = new CleanProjectsJob(projectList);
                        job.schedule();
                    }

                }
            }
        }
        return null;
    }

}