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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.ServletConfig;
    24
    25  import org.apache.commons.collections.iterators.EnumerationIterator;
    26  import org.apache.commons.configuration.PropertyConverter;
    27
    28  /***
    29   * A configuration wrapper around a {@link ServletConfig}. This configuration
    30   * is read only, adding or removing a property will throw an
    31   * 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 ServletConfiguration extends BaseWebConfiguration
    38  {
    39      /*** Stores a reference to the wrapped <code>ServletConfig</code>.*/
    40      protected ServletConfig config;
    41
    42      /***
    43       * Create a ServletConfiguration using the initialization parameter of
    44       * the specified servlet.
    45       *
    46       * @param servlet the servlet
    47       */
    48      public ServletConfiguration(Servlet servlet)
    49      {
    50          this(servlet.getServletConfig());
    51      }
    52
    53      /***
    54       * Create a ServletConfiguration using the servlet initialization parameters.
    55       *
    56       * @param config the servlet configuration
    57       */
    58      public ServletConfiguration(ServletConfig config)
    59      {
    60          this.config = config;
    61      }
    62
    63      public Object getProperty(String key)
    64      {
    65          Object value = config.getInitParameter(key);
    66          if (!isDelimiterParsingDisabled())
    67          {
    68              List list = PropertyConverter.split((String) value, getListDelimiter());
    69              value = list.size() > 1 ? list : value;
    70          }
    71
    72          return value;
    73      }
    74
    75      public Iterator getKeys()
    76      {
    77          return new EnumerationIterator(config.getInitParameterNames());
    78      }
    79  }