1 /* 2 * $Id: ELMessagesPresentTagBeanInfo.java 471754 2006-11-06 14:55:09Z husted $ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 package org.apache.strutsel.taglib.logic; 22 23 import java.beans.IntrospectionException; 24 import java.beans.PropertyDescriptor; 25 import java.beans.SimpleBeanInfo; 26 27 import java.util.ArrayList; 28 29 /** 30 * This is the <code>BeanInfo</code> descriptor for the 31 * <code>org.apache.strutsel.taglib.logic.ELMessagesPresentTag</code> class. 32 * It is needed to override the default mapping of custom tag attribute names 33 * to class attribute names. <p> This is because the value of the unevaluated 34 * EL expression has to be kept separately from the evaluated value, which is 35 * stored in the base class. This is related to the fact that the JSP compiler 36 * can choose to reuse different tag instances if they received the same 37 * original attribute values, and the JSP compiler can choose to not re-call 38 * the setter methods, because it can assume the same values are already set. 39 */ 40 public class ELMessagesPresentTagBeanInfo extends SimpleBeanInfo { 41 public PropertyDescriptor[] getPropertyDescriptors() { 42 ArrayList proplist = new ArrayList(); 43 44 try { 45 proplist.add(new PropertyDescriptor("name", 46 ELMessagesPresentTag.class, null, "setNameExpr")); 47 } catch (IntrospectionException ex) { 48 } 49 50 try { 51 proplist.add(new PropertyDescriptor("property", 52 ELMessagesPresentTag.class, null, "setPropertyExpr")); 53 } catch (IntrospectionException ex) { 54 } 55 56 try { 57 proplist.add(new PropertyDescriptor("message", 58 ELMessagesPresentTag.class, null, "setMessageExpr")); 59 } catch (IntrospectionException ex) { 60 } 61 62 PropertyDescriptor[] result = new PropertyDescriptor[proplist.size()]; 63 64 return ((PropertyDescriptor[]) proplist.toArray(result)); 65 } 66 }