1 /* 2 * $Id: ELMessagesNotPresentTagBeanInfo.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.ELMessagesNotPresentTag</code> 32 * class. It is needed to override the default mapping of custom tag 33 * attribute names to class attribute names. <p> This is because the value of 34 * the unevaluated EL expression has to be kept separately from the evaluated 35 * value, which is stored in the base class. This is related to the fact that 36 * the JSP compiler can choose to reuse different tag instances if they 37 * received the same original attribute values, and the JSP compiler can 38 * choose to not re-call the setter methods, because it can assume the same 39 * values are already set. 40 */ 41 public class ELMessagesNotPresentTagBeanInfo extends SimpleBeanInfo { 42 public PropertyDescriptor[] getPropertyDescriptors() { 43 ArrayList proplist = new ArrayList(); 44 45 try { 46 proplist.add(new PropertyDescriptor("name", 47 ELMessagesNotPresentTag.class, null, "setNameExpr")); 48 } catch (IntrospectionException ex) { 49 } 50 51 try { 52 proplist.add(new PropertyDescriptor("property", 53 ELMessagesNotPresentTag.class, null, "setPropertyExpr")); 54 } catch (IntrospectionException ex) { 55 } 56 57 try { 58 proplist.add(new PropertyDescriptor("message", 59 ELMessagesNotPresentTag.class, null, "setMessageExpr")); 60 } catch (IntrospectionException ex) { 61 } 62 63 PropertyDescriptor[] result = new PropertyDescriptor[proplist.size()]; 64 65 return ((PropertyDescriptor[]) proplist.toArray(result)); 66 } 67 }