    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    }