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    1   /*
    2    * Copyright 1999-2004 The Apache Software Foundation
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *     http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  package org.apache.commons.jxpath.servlet;
    17
    18  import java.util.ArrayList;
    19  import java.util.Enumeration;
    20
    21  import org.apache.commons.jxpath.DynamicPropertyHandler;
    22
    23  /***
    24   * Implementation of the DynamicPropertyHandler interface that provides
    25   * access to attributes of a PageScopeContext.
    26   *
    27   * @author Dmitri Plotnikov
    28   * @version $Revision: 1.6 $ $Date: 2004/05/08 15:10:49 $
    29   */
    30  public class PageScopeContextHandler implements DynamicPropertyHandler {
    31
    32      private static final String[] STRING_ARRAY = new String[0];
    33
    34      public String[] getPropertyNames(Object pageScope) {
    35          Enumeration e = ((PageScopeContext) pageScope).getAttributeNames();
    36          ArrayList list = new ArrayList(16);
    37          while (e.hasMoreElements()) {
    38              list.add(e.nextElement());
    39          }
    40          return (String[]) list.toArray(STRING_ARRAY);
    41      }
    42
    43      public Object getProperty(Object pageScope, String property) {
    44          return ((PageScopeContext) pageScope).getAttribute(property);
    45      }
    46
    47      public void setProperty(Object pageScope, String property, Object value) {
    48          ((PageScopeContext) pageScope).setAttribute(property, value);
    49      }
    50  }