001/* 002 * (C) Copyright 2007 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Nuxeo - initial API and implementation 016 * 017 * $Id: MetaActionSourceRule.java 21703 2007-07-01 20:48:16Z sfermigier $ 018 */ 019 020package org.nuxeo.ecm.platform.ui.web.tag.jsf; 021 022import javax.el.MethodExpression; 023import javax.faces.component.ActionSource; 024import javax.faces.component.ActionSource2; 025import javax.faces.view.facelets.FaceletContext; 026import javax.faces.view.facelets.MetaRule; 027import javax.faces.view.facelets.Metadata; 028import javax.faces.view.facelets.MetadataTarget; 029import javax.faces.view.facelets.TagAttribute; 030 031import org.nuxeo.ecm.platform.ui.web.binding.MetaMethodExpression; 032 033/** 034 * Meta rule set that wires a method binding to a {@link MetaMethodBinding} when invoking the method. 035 * 036 * @author <a href="mailto:at@nuxeo.com">Anahide Tchertchian</a> 037 */ 038public class MetaActionSourceRule extends MetaRule { 039 040 public static final Class[] ACTION_SIG = new Class[0]; 041 042 public static final MetaActionSourceRule Instance = new MetaActionSourceRule(); 043 044 static final class ActionExpressionMapper extends Metadata { 045 046 private final TagAttribute attr; 047 048 ActionExpressionMapper(TagAttribute attr) { 049 this.attr = attr; 050 } 051 052 @Override 053 public void applyMetadata(FaceletContext ctx, Object instance) { 054 ActionSource2 as = (ActionSource2) instance; 055 MethodExpression originalExpression = attr.getMethodExpression(ctx, String.class, ACTION_SIG); 056 as.setActionExpression(new MetaMethodExpression(originalExpression)); 057 } 058 } 059 060 @Override 061 public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget meta) { 062 if (meta.isTargetInstanceOf(ActionSource.class)) { 063 if ("action".equals(name)) { 064 return new ActionExpressionMapper(attribute); 065 } 066 } 067 return null; 068 } 069}