UIPlugin.java

/*
 * ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0
 * 
 * Copyright (c) 2004 - 2006 The ObjectStyle Group and individual authors of the
 * software. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
 * 3. The end-user documentation included with the redistribution, if any, must
 * include the following acknowlegement: "This product includes software
 * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
 * this acknowlegement may appear in the software itself, if and wherever such
 * third-party acknowlegements normally appear.
 * 
 * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse or
 * promote products derived from this software without prior written permission.
 * For written permission, please contact andrus@objectstyle.org.
 * 
 * 5. Products derived from this software may not be called "ObjectStyle" nor
 * may "ObjectStyle" appear in their names without prior written permission of
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 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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 * OBJECTSTYLE GROUP OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by many individuals on
 * behalf of the ObjectStyle Group. For more information on the ObjectStyle
 * Group, please see <http://objectstyle.org/>.
 *  
 */
package org.objectstyle.wolips.ui;

import org.eclipse.core.resources.IFile;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.ui.viewsupport.ImageDescriptorRegistry;
import org.eclipse.jdt.ui.JavaUI;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.objectstyle.wolips.baseforuiplugins.AbstractBaseUIActivator;
import org.osgi.framework.BundleContext;

/**
 * The main plugin class to be used in the desktop.
 * 
 * @author uli
 * @author markus
 */
public class UIPlugin extends AbstractBaseUIActivator {
	// The shared instance.
	private static UIPlugin plugin;

	private ImageDescriptorRegistry _imageDescriptorRegistry;

	/**
	 * The constructor.
	 */
	public UIPlugin() {
		super();
		plugin = this;
	}

	/**
	 * This method is called when the plug-in is stopped
	 */
	public void stop(BundleContext context) throws Exception {
		super.stop(context);
		plugin = null;
	}

	public void start(BundleContext _context) throws Exception {
		super.start(_context);
	}

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

	/**
	 * Returns an image descriptor for the image file at the given plug-in
	 * relative path.
	 * 
	 * @param path
	 *            the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path) {
		return AbstractUIPlugin.imageDescriptorFromPlugin("org.objectstyle.wolips.ui", path);
	}

	public IEditorPart openJavaFile(IFile file) {
		ICompilationUnit unit = JavaCore.createCompilationUnitFrom(file);
		try {
			return JavaUI.openInEditor(unit);
		} catch (PartInitException e) {
			UIPlugin.getDefault().log(e);
		} catch (JavaModelException e) {
			UIPlugin.getDefault().log(e);
		}
		return null;
	}

	public static ImageDescriptorRegistry getImageDescriptorRegistry() {
		return getDefault().internalGetImageDescriptorRegistry();
	}

	private synchronized ImageDescriptorRegistry internalGetImageDescriptorRegistry() {
		if (_imageDescriptorRegistry == null) {
			_imageDescriptorRegistry = new ImageDescriptorRegistry();
		}
		return _imageDescriptorRegistry;
	}
}