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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 java.util.List;
    22  import javax.servlet.Servlet;
    23  import javax.servlet.ServletContext;
    24
    25  import org.apache.commons.collections.iterators.EnumerationIterator;
    26  import org.apache.commons.configuration.PropertyConverter;
    27
    28  /***
    29   * A configuration wrapper to read the initialization parameters of a servlet
    30   * context. This configuration is read only, adding or removing a property will
    31   * throw an UnsupportedOperationException.
    32   *
    33   * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
    34   * @version $Revision: 439648 $, $Date: 2006-09-02 22:42:10 +0200 (Sa, 02 Sep 2006) $
    35   * @since 1.1
    36   */
    37  public class ServletContextConfiguration extends BaseWebConfiguration
    38  {
    39      /*** Stores the wrapped servlet context.*/
    40      protected ServletContext context;
    41
    42      /***
    43       * Create a ServletContextConfiguration using the context of
    44       * the specified servlet.
    45       *
    46       * @param servlet the servlet
    47       */
    48      public ServletContextConfiguration(Servlet servlet)
    49      {
    50          this.context = servlet.getServletConfig().getServletContext();
    51      }
    52
    53      /***
    54       * Create a ServletContextConfiguration using the servlet context
    55       * initialization parameters.
    56       *
    57       * @param context the servlet context
    58       */
    59      public ServletContextConfiguration(ServletContext context)
    60      {
    61          this.context = context;
    62      }
    63
    64      public Object getProperty(String key)
    65      {
    66          Object value = context.getInitParameter(key);
    67          if (!isDelimiterParsingDisabled())
    68          {
    69              List list = PropertyConverter.split((String) value, getListDelimiter());
    70              value = list.size() > 1 ? list : value;
    71          }
    72
    73          return value;
    74      }
    75
    76      public Iterator getKeys()
    77      {
    78          return new EnumerationIterator(context.getInitParameterNames());
    79      }
    80  }