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1   /*
2    * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
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7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24   */
25  
26  package jdk.nashorn.internal.runtime.options;
27  
28  import java.util.Collections;
29  import java.util.LinkedHashMap;
30  import java.util.Map;
31  import java.util.StringTokenizer;
32  
33  /**
34   * Key Value option such as logger. It comes on the format
35   * such as:
36   *
37   * {@code --log=module1:level1,module2:level2... }
38   */
39  public final class KeyValueOption extends Option<String> {
40      /**
41       * Map of keys given
42       */
43      protected Map<String, String> map;
44  
45      KeyValueOption(final String value) {
46          super(value);
47          initialize();
48      }
49  
50      Map<String, String> getValues() {
51          return Collections.unmodifiableMap(map);
52      }
53  
54      /**
55       * Check if the key value option has a value or if it has not
56       * been initialized
57       * @param key the key
58       * @return value, or null if not initialized
59       */
60      public boolean hasValue(final String key) {
61          return map != null && map.get(key) != null;
62      }
63  
64      String getValue(final String key) {
65          if (map == null) {
66              return null;
67          }
68          final String val = map.get(key);
69          return "".equals(val) ? null : val;
70      }
71  
72      private void initialize() {
73          if (getValue() == null) {
74              return;
75          }
76  
77          map = new LinkedHashMap<>();
78  
79          final StringTokenizer st = new StringTokenizer(getValue(), ",");
80          while (st.hasMoreElements()) {
81              final String   token    = st.nextToken();
82              final String[] keyValue = token.split(":");
83  
84              if (keyValue.length == 1) {
85                  map.put(keyValue[0], "");
86              } else if (keyValue.length == 2) {
87                  map.put(keyValue[0], keyValue[1]);
88              } else {
89                  throw new IllegalArgumentException(token);
90              }
91          }
92      }
93  }