ELSizeTagBeanInfo.java

/*
 * $Id: ELSizeTagBeanInfo.java 471754 2006-11-06 14:55:09Z husted $
 *
 * 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.strutsel.taglib.bean;

import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.beans.SimpleBeanInfo;

import java.util.ArrayList;

/**
 * This is the <code>BeanInfo</code> descriptor for the
 * <code>org.apache.strutsel.taglib.bean.ELSizeTag</code> class.  It is needed
 * to override the default mapping of custom tag attribute names to class
 * attribute names. <p> This is because the value of the unevaluated EL
 * expression has to be kept separately from the evaluated value, which is
 * stored in the base class. This is related to the fact that the JSP compiler
 * can choose to reuse different tag instances if they received the same
 * original attribute values, and the JSP compiler can choose to not re-call
 * the setter methods, because it can assume the same values are already set.
 */
public class ELSizeTagBeanInfo extends SimpleBeanInfo {
    public PropertyDescriptor[] getPropertyDescriptors() {
        ArrayList proplist = new ArrayList();

        try {
            proplist.add(new PropertyDescriptor("collection", ELSizeTag.class,
                    null, "setCollectionExpr"));
        } catch (IntrospectionException ex) {
        }

        try {
            proplist.add(new PropertyDescriptor("id", ELSizeTag.class, null,
                    "setIdExpr"));
        } catch (IntrospectionException ex) {
        }

        try {
            proplist.add(new PropertyDescriptor("name", ELSizeTag.class, null,
                    "setNameExpr"));
        } catch (IntrospectionException ex) {
        }

        try {
            proplist.add(new PropertyDescriptor("property", ELSizeTag.class,
                    null, "setPropertyExpr"));
        } catch (IntrospectionException ex) {
        }

        try {
            proplist.add(new PropertyDescriptor("scope", ELSizeTag.class, null,
                    "setScopeExpr"));
        } catch (IntrospectionException ex) {
        }

        PropertyDescriptor[] result = new PropertyDescriptor[proplist.size()];

        return ((PropertyDescriptor[]) proplist.toArray(result));
    }
}