com.google.test.metric.eclipse.ui.plugin.Activator.java Source code

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Here is the source code for com.google.test.metric.eclipse.ui.plugin.Activator.java

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/*
 * Copyright 2009 Google Inc.
 * 
 * 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.google.test.metric.eclipse.ui.plugin;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

/**
 * The activator class controls the plug-in life cycle
 */
public class Activator extends AbstractUIPlugin {
    private Map<String, Image> images = new HashMap<String, Image>();

    // The plug-in ID
    public static final String PLUGIN_ID = "com.google.test.metric.eclipse.ui";

    // The shared instance
    private static Activator plugin;

    /**
     * The constructor
     */
    public Activator() {
    }

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

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

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

    public Image getImage(String path) throws ImageNotFoundException {
        Image image = images.get(path);
        if (image == null) {
            String pluginLocation = Activator.getDefault().getBundle().getLocation();
            if (pluginLocation.startsWith("reference:")) {
                pluginLocation = pluginLocation.substring(10);
            }
            URL url;
            try {
                url = new URL(pluginLocation + path);
            } catch (MalformedURLException e) {
                throw new ImageNotFoundException("Image : " + path + " not found");
            }

            ImageDescriptor projectImageDescriptor = ImageDescriptor.createFromURL(url);
            image = projectImageDescriptor.createImage();
            images.put(path, image);
        }
        return image;
    }
}