droolsideplugin.java

jboss规则引擎

 package org.drools.ide;
/*
 * Copyright 2005 JBoss 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.
 */

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.drools.ide.preferences.IDroolsConstants;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugException;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Color;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The main plugin class to be used in the desktop.
 * 
 * @author <a href="mailto:[e-mail]">kris verlaenen </a>
 */
public class DroolsIDEPlugin extends AbstractUIPlugin {
    
    public static final int INTERNAL_ERROR = 120;
    public static final String PLUGIN_ID = "org.drools.ide";
    
	//The shared instance.
	private static DroolsIDEPlugin plugin;
	//Resource bundle.
	private ResourceBundle resourceBundle;
	private Map colors = new HashMap();
	
	/**
	 * The constructor.
	 */
	public DroolsIDEPlugin() {
		super();
		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;
		resourceBundle = null;
		Iterator iterator = colors.values().iterator();
		while (iterator.hasNext()) {
			((Color) iterator.next()).dispose();
		}
	}

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

	/**
	 * Returns the string from the plugin's resource bundle,
	 * or 'key' if not found.
	 */
	public static String getResourceString(String key) {
		ResourceBundle bundle = DroolsIDEPlugin.getDefault().getResourceBundle();
		try {
			return (bundle != null) ? bundle.getString(key) : key;
		} catch (MissingResourceException e) {
			return key;
		}
	}

	/**
	 * Returns the plugin's resource bundle,
	 */
	public ResourceBundle getResourceBundle() {
		try {
			if (resourceBundle == null)
				resourceBundle = ResourceBundle.getBundle("droolsIDE.DroolsIDEPluginResources");
		} catch (MissingResourceException x) {
			resourceBundle = null;
		}
		return resourceBundle;
	}

	/**
	 * Returns an image descriptor for the image file at the given
	 * plug-in relative path.
     * Uses the plug ins image registry to "cache" it.
	 *
	 * @param path the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path) {
        
        DroolsIDEPlugin plugin = getDefault();
        ImageRegistry reg = plugin.getImageRegistry();
        ImageDescriptor des = reg.getDescriptor( path );
        if (des == null) {
            des = AbstractUIPlugin.imageDescriptorFromPlugin("org.drools.ide", path);
            reg.put( path, des );
        }
		return des;
	}
    
    public static String getUniqueIdentifier() {
        if (getDefault() == null) {
            return PLUGIN_ID;
        }
        return getDefault().getBundle().getSymbolicName();
    }
    
    public static void log(Throwable t) {
        Throwable top = t;
        if (t instanceof DebugException) {
            DebugException de = (DebugException) t;
            IStatus status = de.getStatus();
            if (status.getException() != null) {
                top = status.getException();
            }
        } 
        log(new Status(IStatus.ERROR, getUniqueIdentifier(),
            INTERNAL_ERROR, "Internal error in Drools Plugin: ", top));        
    }

    public static void log(IStatus status) {
        getDefault().getLog().log(status);
    }

	public Color getColor(String type) {
		return (Color) colors.get(type);
	}
	
	public void setColor(String type, Color color) {
		colors.put(type, color);
	}
	
	protected void initializeDefaultPreferences(IPreferenceStore store) {
		store.setDefault(IDroolsConstants.BUILD_ALL, false);
		store.setDefault(IDroolsConstants.EDITOR_FOLDING, true);
	}

}