com.google.gdt.eclipse.designer.hosted.tdt.Activator.java Source code

Introduction

Here is the source code for com.google.gdt.eclipse.designer.hosted.tdt.Activator.java

Source

/*******************************************************************************
 * 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.designer.hosted.tdt;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.io.IOUtils;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 * @coverage gwtHosted
 */
public class Activator extends AbstractUIPlugin {
    // The plug-in ID
    public static final String PLUGIN_ID = "com.instantiations.designer.gwt.hosted.2_2";
    // The shared instance
    private static Activator m_plugin;

    /*
     * (non-Javadoc)
     * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
     */
    @Override
    public void start(BundleContext context) throws Exception {
        super.start(context);
        m_plugin = this;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
     */
    @Override
    public void stop(BundleContext context) throws Exception {
        m_plugin = null;
        super.stop(context);
    }

    /**
     * Returns the shared instance
     * 
     * @return the shared instance
     */
    public static Activator getDefault() {
        return m_plugin;
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Images
    //
    ////////////////////////////////////////////////////////////////////////////
    private static final Map<String, Image> m_nameToIconMap = new HashMap<String, Image>();

    /**
     * Open file from plugin directory.
     */
    public static InputStream getFile(String name) {
        try {
            return m_plugin.getBundle().getEntry(name).openStream();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Return array of entry sub-paths in given path.
     */
    public static String[] getEntriesPaths(String path) {
        List<String> entryPaths;
        {
            Enumeration<?> entryPathsEnumeration = m_plugin.getBundle().getEntryPaths(path);
            entryPaths = new ArrayList<String>();
            CollectionUtils.addAll(entryPaths, entryPathsEnumeration);
        }
        // remove "CVS" files (far case when we use runtime workbench)
        for (Iterator<String> I = entryPaths.iterator(); I.hasNext();) {
            String entryPath = I.next();
            if (entryPath.indexOf("CVS") != -1) {
                I.remove();
            }
        }
        // convert to array
        return entryPaths.toArray(new String[entryPaths.size()]);
    }

    /**
     * Get image from "icons" directory.
     */
    public static Image getImage(String name) {
        Image image = m_nameToIconMap.get(name);
        if (image == null) {
            // prepare path
            String path;
            if (name.startsWith("/")) {
                path = name;
            } else {
                path = "icons/" + name;
            }
            //
            InputStream is = getFile(path);
            try {
                image = new Image(Display.getCurrent(), is);
                m_nameToIconMap.put(name, image);
            } finally {
                IOUtils.closeQuietly(is);
            }
        }
        return image;
    }

    /**
     * Get image descriptor from "icons" directory.
     */
    public static ImageDescriptor getImageDescriptor(String name) {
        URL url = m_plugin.getBundle().getEntry("icons/" + name);
        return ImageDescriptor.createFromURL(url);
    }
}