com.buzzcoders.yasw.widgets.map.MapActivator.java Source code

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Here is the source code for com.buzzcoders.yasw.widgets.map.MapActivator.java

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/*******************************************************************************
 * Copyright (c) 2014 Massimo Rabbi.
 * 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
 * 
 * Contributors:
 *     Massimo Rabbi <mrabbi@users.sourceforge.net> - initial API and implementation
 ******************************************************************************/
package com.buzzcoders.yasw.widgets.map;

import java.io.IOException;
import java.net.URL;

import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;

import com.buzzcoders.yasw.widgets.map.messages.Messages;

/**
 * The activator class controls the plug-in life cycle
 */
public class MapActivator extends AbstractUIPlugin {

    public static final String FIND_BTN_IMG = "FIND_BTN"; //$NON-NLS-1$

    // The plug-in ID
    public static final String PLUGIN_ID = "com.buzzcoders.yasw.widgets.map"; //$NON-NLS-1$

    // The shared instance
    private static MapActivator plugin;

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

    /*
     * (non-Javadoc)
     * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
     */
    public void start(BundleContext context) throws Exception {
        super.start(context);
        plugin = this;
        // trick used to unpack the dir content to filesystem
        getFileLocation("mapfiles/gmaps_library/"); //$NON-NLS-1$
    }

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

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

    /**
     * Logs an error message and an optional exception for the current bundle.
     * 
     * @param message
     *            a human-readable message
     * @param exception
     *            a low-level exception, or <code>null</code> if not applicable
     */
    public static void logError(String message, Throwable exception) {
        Platform.getLog(getDefault().getBundle()).log(new Status(IStatus.ERROR, PLUGIN_ID, message, exception));
    }

    /**
     * Gets the full path name for a resource located inside the current bundle.
     * 
     * @param path
     *            the path of the internal resource
     * @return the string corresponding to the full path
     * @throws IOException
     *             if a problem occurs during conversion
     */
    public static String getFileLocation(String path) {
        Assert.isNotNull(path);
        Bundle bundle = getDefault().getBundle();
        String fullPath = null;
        try {
            if (bundle != null) {
                fullPath = FileLocator.toFileURL(bundle.getEntry(path)).getPath();
            }
        } catch (IOException ex) {
            logError(Messages.MapActivator_FileError, ex);
        }
        return fullPath;
    }

    @Override
    protected void initializeImageRegistry(ImageRegistry reg) {
        Bundle bundle = Platform.getBundle(PLUGIN_ID);
        IPath path = new Path("icons/find-20.png"); //$NON-NLS-1$
        URL url = FileLocator.find(bundle, path, null);
        ImageDescriptor desc = ImageDescriptor.createFromURL(url);
        reg.put(FIND_BTN_IMG, desc);
    }

}