001/* 002 * (C) Copyright 2007 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 * 019 * $Id: MetaActionSourceRule.java 21703 2007-07-01 20:48:16Z sfermigier $ 020 */ 021 022package org.nuxeo.ecm.platform.ui.web.tag.jsf; 023 024import javax.el.MethodExpression; 025import javax.faces.component.ActionSource; 026import javax.faces.component.ActionSource2; 027import javax.faces.view.facelets.FaceletContext; 028import javax.faces.view.facelets.MetaRule; 029import javax.faces.view.facelets.Metadata; 030import javax.faces.view.facelets.MetadataTarget; 031import javax.faces.view.facelets.TagAttribute; 032 033import org.nuxeo.ecm.platform.ui.web.binding.MetaMethodExpression; 034 035/** 036 * Meta rule set that wires a method binding to a {@link MetaMethodBinding} when invoking the method. 037 * 038 * @author <a href="mailto:at@nuxeo.com">Anahide Tchertchian</a> 039 */ 040public class MetaActionSourceRule extends MetaRule { 041 042 public static final Class[] ACTION_SIG = new Class[0]; 043 044 public static final MetaActionSourceRule Instance = new MetaActionSourceRule(); 045 046 static final class ActionExpressionMapper extends Metadata { 047 048 private final TagAttribute attr; 049 050 ActionExpressionMapper(TagAttribute attr) { 051 this.attr = attr; 052 } 053 054 @Override 055 public void applyMetadata(FaceletContext ctx, Object instance) { 056 ActionSource2 as = (ActionSource2) instance; 057 MethodExpression originalExpression = attr.getMethodExpression(ctx, String.class, ACTION_SIG); 058 as.setActionExpression( 059 new MetaMethodExpression(originalExpression, ctx.getFunctionMapper(), ctx.getVariableMapper())); 060 } 061 } 062 063 @Override 064 public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget meta) { 065 if (meta.isTargetInstanceOf(ActionSource.class)) { 066 if ("action".equals(name)) { 067 return new ActionExpressionMapper(attribute); 068 } 069 } 070 return null; 071 } 072}