Coverage Report

Coverage Report - org.apache.ojb.broker.util.DoubleHashtable

Classes in this File

1.333

 package org.apache.ojb.broker.util;
 
 /* Copyright 2002-2005 The Apache Software Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 import java.util.Hashtable;
 
 /**
  * this class can be used to build two-way lookup tables.
  * It provides lookup from keys to values and the inverse
  * lookup from values to keys.
  *
  * @author Thomas Mahler
  * @version $Id: DoubleHashtable.java,v 1.1 2007-08-24 22:17:36 ewestfal Exp $
  */
 public class DoubleHashtable
 {
     /**
      * the table for key lookups.
      */
     private Hashtable keyTable;
 
     /**
      * the table for value lookups.
      */
     private Hashtable valueTable;
 
     /**
      * public default constructor.
      */
     public DoubleHashtable()
     {
         keyTable = new Hashtable();
         valueTable = new Hashtable();
     }
 
     /**
      * put a (key, value) pair into the table.
      * @param key the key object.
      * @param value the value object.
      */
     public void put(Object key, Object value)
     {
         keyTable.put(key, value);
         valueTable.put(value, key);
     }
 
     /**
      * lookup a value from the table by its key.
      * @param key the key object
      * @return the associated value object
      */
     public Object getValueByKey(Object key)
     {
         return keyTable.get(key);
     }
 
     /**
      * lookup a key from the table by its value.
      * @param value the value object
      * @return the associated key object
      */
     public Object getKeyByValue(Object value)
     {
         return valueTable.get(value);
     }
 
     /**
      * remove a (key, value)-entry by its key
      * @param key the key object
      */
     public void removeByKey(Object key)
     {
         Object value = keyTable.remove(key);
         if (value != null)
         {
             valueTable.remove(value);
         }
     }
 
     /**
      * remove a (key, value)-entry by its value
      * @param value the value object
      */
     public void removeByValue(Object value)
     {
         Object key = valueTable.remove(value);
         if (key != null)
         {
             keyTable.remove(key);
         }
     }
 
 }

1		package org.apache.ojb.broker.util;
2
3		/* Copyright 2002-2005 The Apache Software Foundation
4		*
5		* Licensed under the Apache License, Version 2.0 (the "License");
6		* you may not use this file except in compliance with the License.
7		* 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		import java.util.Hashtable;
19
20		/**
21		* this class can be used to build two-way lookup tables.
22		* It provides lookup from keys to values and the inverse
23		* lookup from values to keys.
24		*
25		* @author Thomas Mahler
26		* @version $Id: DoubleHashtable.java,v 1.1 2007-08-24 22:17:36 ewestfal Exp $
27		*/
28		public class DoubleHashtable
29		{
30		/**
31		* the table for key lookups.
32		*/
33		private Hashtable keyTable;
34
35		/**
36		* the table for value lookups.
37		*/
38		private Hashtable valueTable;
39
40		/**
41		* public default constructor.
42		*/
43		public DoubleHashtable()
44		{
45		keyTable = new Hashtable();
46		valueTable = new Hashtable();
47		}
48
49		/**
50		* put a (key, value) pair into the table.
51		* @param key the key object.
52		* @param value the value object.
53		*/
54		public void put(Object key, Object value)
55		{
56		keyTable.put(key, value);
57		valueTable.put(value, key);
58		}
59
60		/**
61		* lookup a value from the table by its key.
62		* @param key the key object
63		* @return the associated value object
64		*/
65		public Object getValueByKey(Object key)
66		{
67		return keyTable.get(key);
68		}
69
70		/**
71		* lookup a key from the table by its value.
72		* @param value the value object
73		* @return the associated key object
74		*/
75		public Object getKeyByValue(Object value)
76		{
77		return valueTable.get(value);
78		}
79
80		/**
81		* remove a (key, value)-entry by its key
82		* @param key the key object
83		*/
84		public void removeByKey(Object key)
85		{
86		Object value = keyTable.remove(key);
87		if (value != null)
88		{
89		valueTable.remove(value);
90		}
91		}
92
93		/**
94		* remove a (key, value)-entry by its value
95		* @param value the value object
96		*/
97		public void removeByValue(Object value)
98		{
99		Object key = valueTable.remove(value);
100		if (key != null)
101		{
102		keyTable.remove(key);
103		}
104		}
105
106		}