nowpublicimages.java

J2EE eclipse 下开发数据库一个插件

/*
 * Created on 2003-5-2
 *
 */
package com.tanghan.plugin;

import java.net.MalformedURLException;
import java.net.URL;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;

import org.eclipse.core.runtime.Platform;

import org.eclipse.jface.resource.ImageRegistry;

//import org.eclipse.core.runtime.IStatus;
//import org.eclipse.core.runtime.Status;
/**
 * 
 * @author Jerry Tang
 * @version v0.1.0
 * @copyright  (C) 2003 Tanghan工作组
 *
 */
public class NowPublicImages implements IPublicImages {

	private static Map descriptors = new HashMap();
	private static ImageRegistry imageRegistry;
	private static NowPublicImages me ;
	private static final URL URL_BASIC = Platform.getPlugin(TanghanPlugin.PLUGIN_ID).getDescriptor().getInstallURL();
	
	private static final String ICONS_PATH = "icons/";
	
	private static final String DATABASE_ICONS_PATH = ICONS_PATH;
	
	
	private NowPublicImages(){
		initializeImageRegistry();
	}
	public static NowPublicImages getInstance(){
		if(me==null){
			initInstance();
		}
		return me;
	}
	private synchronized static void initInstance(){
		me = new NowPublicImages();
	}
	
	private void initializeImageRegistry(){
		imageRegistry = new ImageRegistry();
		declareImages();
	}
	/**
	 * Declare an ImageDescriptor in the descriptor table.
	 * @param key   The key to use when registering the image
	 * @param path  The path where the image can be found. This path is relative to where
	 *              this plugin class is found (i.e. typically the packages directory)
	 */
	private void declareImage(String key,String path) {
		URL url = null;
		try {
			url = new URL(URL_BASIC, path);
		} catch (MalformedURLException e) {
		}
		ImageDescriptor desc = ImageDescriptor.createFromURL(url);
		descriptors.put(key, desc);
	}
	/**
	 * Declare an Image in the registry table.
	 * @param key   The key to use when registering the image
	 * @param path  The path where the image can be found. This path is relative to where
	 *              this plugin class is found (i.e. typically the packages directory)
	 */
	private void declareRegistryImage(String key,String path) {
		URL url = null;
		try {
			url = new URL(URL_BASIC, path);
		} catch (MalformedURLException e) {
		}
		//TanghanPlugin.getDefault().getLog().log(new Status(IStatus.INFO, TanghanPlugin.getDefault().toString(),IStatus.OK, url.toString(),null));		
		ImageDescriptor desc = ImageDescriptor.createFromURL(url);
		descriptors.put(key, desc);
		imageRegistry.put(key, desc);
	}
	
	private void declareImages() {
		declareRegistryImage(IPublicImages.IMG_DB_CONNECTION, DATABASE_ICONS_PATH+"Connection.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_DISCONNECTION, DATABASE_ICONS_PATH+"disconnection.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_TABLES, DATABASE_ICONS_PATH+"tables.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_TABLE, DATABASE_ICONS_PATH+"table.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_VIEWS, DATABASE_ICONS_PATH+"tables.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_VIEW, DATABASE_ICONS_PATH+"view.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_FIELD, DATABASE_ICONS_PATH+"column.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_COLUMN_PRIMARYKEY, DATABASE_ICONS_PATH+"columnPrimary.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DB_COLUMN_FOREIGNKEY, DATABASE_ICONS_PATH+"columnForeign.gif");//$NON-NLS-1$
		
		declareRegistryImage(IPublicImages.IMG_DB_DATABASE, DATABASE_ICONS_PATH+"database.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DRIVER_DRIVERS, DATABASE_ICONS_PATH+"drivers.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DRIVER_DRIVER_ACTIVE, DATABASE_ICONS_PATH+"driverPrefered.gif");//$NON-NLS-1$
		declareRegistryImage(IPublicImages.IMG_DRIVER_DRIVER_INACTIVE, DATABASE_ICONS_PATH+"driverPreferedNotInstalled.gif");//$NON-NLS-1$
	}
			
	/* (non-Javadoc)
	 * @see com.tanghan.plugin.IPublicImages#getImage(java.lang.String)
	 */
	public Image getImage(String symbolicName) {
		return getImageRegistry().get(symbolicName);
	}

	/* (non-Javadoc)
	 * @see com.tanghan.plugin.IPublicImages#getImageDescriptor(java.lang.String)
	 */
	public ImageDescriptor getImageDescriptor(String symbolicName) {
		return  (ImageDescriptor)descriptors.get(symbolicName);
	}
	

	/* (non-Javadoc)
	 * @see com.tanghan.plugin.IPublicImages#getImageRegistry()
	 */
	public ImageRegistry getImageRegistry() {
		return imageRegistry;
	}
}