| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.commons.jelly.tags.swing; |
| |
| import java.awt.event.ActionEvent; |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import javax.swing.AbstractAction; |
| import javax.swing.Action; |
| |
| import org.apache.commons.beanutils.BeanUtils; |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.MissingAttributeException; |
| import org.apache.commons.jelly.XMLOutput; |
| import org.apache.commons.jelly.tags.core.UseBeanTag; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * Creates a Swing Action which on invocation will execute the body of this tag. |
| * The Action is then output as a variable for reuse if the 'var' attribute is specified |
| * otherwise the action is added to the parent JellySwing widget. |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @version $Revision$ |
| */ |
| public class ActionTag extends UseBeanTag { |
| |
| /** The Log to which logging calls will be made. */ |
| private static final Log log = LogFactory.getLog(ActionTag.class); |
| |
| public ActionTag() { |
| } |
| |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| |
| /** |
| * @return the Action object for this tag |
| */ |
| public Action getAction() { |
| return (Action) getBean(); |
| } |
| |
| |
| // Implementation methods |
| //------------------------------------------------------------------------- |
| |
| |
| /** |
| * An existing Action could be specified via the 'action' attribute or an action class |
| * may be specified via the 'class' attribute, otherwise a default Action class is created. |
| */ |
| protected Class convertToClass(Object classObject) throws MissingAttributeException, ClassNotFoundException { |
| if (classObject == null) { |
| return null; |
| } |
| else { |
| return super.convertToClass(classObject); |
| } |
| } |
| |
| /** |
| * An existing Action could be specified via the 'action' attribute or an action class |
| * may be specified via the 'class' attribute, otherwise a default Action class is created. |
| */ |
| protected Object newInstance(Class theClass, Map attributes, final XMLOutput output) throws JellyTagException { |
| Action action = (Action) attributes.remove( "action" ); |
| if ( action == null ) { |
| if (theClass != null ) { |
| |
| try { |
| return theClass.newInstance(); |
| } catch (InstantiationException e) { |
| throw new JellyTagException(e); |
| } catch (IllegalAccessException e) { |
| throw new JellyTagException(e); |
| } |
| |
| } |
| else { |
| action = new AbstractAction() { |
| public void actionPerformed(ActionEvent event) { |
| context.setVariable( "event", event ); |
| try { |
| ActionTag.super.invokeBody(output); |
| } |
| catch (Exception e) { |
| log.error( "Caught: " + e, e ); |
| } |
| } |
| }; |
| } |
| } |
| return action; |
| } |
| |
| public void invokeBody(XMLOutput output) { |
| // do nothing |
| } |
| |
| |
| /** |
| * Either defines a variable or adds the current component to the parent |
| */ |
| protected void processBean(String var, Object bean) throws JellyTagException { |
| if (var != null) { |
| context.setVariable(var, bean); |
| } |
| else { |
| ComponentTag tag = (ComponentTag) findAncestorWithClass( ComponentTag.class ); |
| if ( tag != null ) { |
| tag.setAction((Action) bean); |
| } |
| else { |
| throw new JellyTagException( "Either the 'var' attribute must be specified to export this Action or this tag must be nested within a JellySwing widget tag" ); |
| } |
| } |
| } |
| |
| |
| /** |
| * Perform the strange setting of Action properties using its custom API |
| */ |
| protected void setBeanProperties(Object bean, Map attributes) throws JellyTagException { |
| Action action = getAction(); |
| |
| String enabled = "enabled"; |
| if (attributes.containsKey(enabled)) { |
| try { |
| BeanUtils.copyProperty(action, enabled, attributes.get(enabled)); |
| } catch (IllegalAccessException e) { |
| throw new JellyTagException("Failed to set the enabled property.", e); |
| } catch (InvocationTargetException e) { |
| throw new JellyTagException("Failed to set the enabled property.", e); |
| } |
| |
| attributes.remove(enabled); |
| } |
| |
| for ( Iterator iter = attributes.entrySet().iterator(); iter.hasNext(); ) { |
| Map.Entry entry = (Map.Entry) iter.next(); |
| String name = (String) entry.getKey(); |
| |
| // typically standard Action names start with upper case, so lets upper case it |
| name = capitalize(name); |
| Object value = entry.getValue(); |
| |
| action.putValue( name, value ); |
| } |
| } |
| |
| |
| protected String capitalize(String text) { |
| char ch = text.charAt(0); |
| if ( Character.isUpperCase( ch ) ) { |
| return text; |
| } |
| StringBuffer buffer = new StringBuffer(text.length()); |
| buffer.append( Character.toUpperCase( ch ) ); |
| buffer.append( text.substring(1) ); |
| return buffer.toString(); |
| } |
| |
| } |