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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17
    18  package org.apache.commons.configuration.web;
    19
    20  import java.util.Iterator;
    21  import javax.servlet.Servlet;
    22  import javax.servlet.ServletContext;
    23
    24  import org.apache.commons.collections.iterators.EnumerationIterator;
    25
    26  /***
    27   * A configuration wrapper to read the initialization parameters of a servlet
    28   * context. This configuration is read only, adding or removing a property will
    29   * throw an UnsupportedOperationException.
    30   *
    31   * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
    32   * @version $Revision: 515306 $, $Date: 2007-03-06 22:15:00 +0100 (Di, 06 Mrz 2007) $
    33   * @since 1.1
    34   */
    35  public class ServletContextConfiguration extends BaseWebConfiguration
    36  {
    37      /*** Stores the wrapped servlet context.*/
    38      protected ServletContext context;
    39
    40      /***
    41       * Create a ServletContextConfiguration using the context of
    42       * the specified servlet.
    43       *
    44       * @param servlet the servlet
    45       */
    46      public ServletContextConfiguration(Servlet servlet)
    47      {
    48          this.context = servlet.getServletConfig().getServletContext();
    49      }
    50
    51      /***
    52       * Create a ServletContextConfiguration using the servlet context
    53       * initialization parameters.
    54       *
    55       * @param context the servlet context
    56       */
    57      public ServletContextConfiguration(ServletContext context)
    58      {
    59          this.context = context;
    60      }
    61
    62      public Object getProperty(String key)
    63      {
    64          return handleDelimiters(context.getInitParameter(key));
    65      }
    66
    67      public Iterator getKeys()
    68      {
    69          return new EnumerationIterator(context.getInitParameterNames());
    70      }
    71  }