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
   6  * under the terms of the GNU General Public License version 2 only, as
   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
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  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 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 }