treeviewplugin.java

来自「TTreeview 的 Java实例 Eclipes环境下」· Java 代码 · 共 86 行

package demo.pluginA.treeview;

import java.util.ArrayList;
import org.eclipse.ui.plugin.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IPluginRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
import org.osgi.framework.BundleContext;
import demo.pluginA.treeview.data.IDataFactory;


/**
 * The main plugin class to be used in the desktop.
 */
public class TreeviewPlugin extends AbstractUIPlugin {

	//The shared instance.
	private static TreeviewPlugin plugin;
	
	/**
	 * The constructor.
	 */
	public TreeviewPlugin() {
		plugin = this;
	}

	/**
	 * This method is called upon plug-in activation
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
	}

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

	/**
	 * Returns the shared instance.
	 */
	public static TreeviewPlugin 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("demo.pluginA.treeview", path);
	}

    public static Object loadDataFactory(Boolean isNew, String path){
    	ArrayList list = new ArrayList();
    	IPluginRegistry r=Platform. getPluginRegistry();
    	String pluginID="demo.pluginA.treeview"; 
    	String extensionPointID = "datafactory"; 
    	IExtensionPoint p=r.getExtensionPoint( pluginID, extensionPointID); 
    	IConfigurationElement[] c=p.getConfigurationElements(); 
    	if( c != null) { 
    		for( int i= 0; i <c.length; i++) { 
    			IDataFactory data = null;
    			try { 
    				data=( IDataFactory)c[i].createExecutableExtension("class"); 
    				if( data != null){
    					list.add(data.createTreeData(isNew,path)); 
    				}
    			} catch( CoreException x) { 
    					// handle exception } } }
    			}
    		}
    	}
    	return list.get(list.size()-1);
    }
}