001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.commons.jxpath.servlet;
018
019 import java.util.ArrayList;
020 import java.util.Enumeration;
021
022 import org.apache.commons.jxpath.DynamicPropertyHandler;
023
024 /**
025 * Implementation of the {@link DynamicPropertyHandler} interface that provides
026 * access to attributes of a {@link PageScopeContext}.
027 *
028 * @author Dmitri Plotnikov
029 * @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
030 */
031 public class PageScopeContextHandler implements DynamicPropertyHandler {
032
033 private static final int DEFAULT_LIST_SIZE = 16;
034
035 public String[] getPropertyNames(Object pageScope) {
036 Enumeration e = ((PageScopeContext) pageScope).getAttributeNames();
037 ArrayList list = new ArrayList(DEFAULT_LIST_SIZE);
038 while (e.hasMoreElements()) {
039 list.add(e.nextElement());
040 }
041 return (String[]) list.toArray(new String[list.size()]);
042 }
043
044 public Object getProperty(Object pageScope, String property) {
045 return ((PageScopeContext) pageScope).getAttribute(property);
046 }
047
048 public void setProperty(Object pageScope, String property, Object value) {
049 ((PageScopeContext) pageScope).setAttribute(property, value);
050 }
051 }