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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.configuration2.web;
19  
20  import java.applet.Applet;
21  import java.util.Arrays;
22  import java.util.Iterator;
23  
24  /**
25   * A configuration wrapper to read applet parameters. This configuration is read only, adding or removing a property
26   * will throw an UnsupportedOperationException.
27   *
28   * @since 1.1
29   */
30  public class AppletConfiguration extends BaseWebConfiguration {
31      /** Stores the wrapped applet. */
32      protected Applet applet;
33  
34      /**
35       * Create an AppletConfiguration using the initialization parameters of the specified Applet.
36       *
37       * @param applet the applet
38       */
39      public AppletConfiguration(final Applet applet) {
40          this.applet = applet;
41      }
42  
43      @Override
44      protected Object getPropertyInternal(final String key) {
45          return handleDelimiters(applet.getParameter(key));
46      }
47  
48      @Override
49      protected Iterator<String> getKeysInternal() {
50          final String[][] paramsInfo = applet.getParameterInfo();
51          final String[] keys = new String[paramsInfo != null ? paramsInfo.length : 0];
52          if (paramsInfo != null) {
53              for (int i = 0; i < keys.length; i++) {
54                  keys[i] = paramsInfo[i][0];
55              }
56          }
57          return Arrays.asList(keys).iterator();
58      }
59  }