Source Code Cross Referenced for KeySortUtility.java in  » 6.0-JDK-Modules » j2me » com » sun » kvem » midp » pim » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.kvem.midp.pim 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         *   
03:         *
04:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
05:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06:         * 
07:         * This program is free software; you can redistribute it and/or
08:         * modify it under the terms of the GNU General Public License version
09:         * 2 only, as published by the Free Software Foundation.
10:         * 
11:         * This program is distributed in the hope that it will be useful, but
12:         * WITHOUT ANY WARRANTY; without even the implied warranty of
13:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14:         * General Public License version 2 for more details (a copy is
15:         * included at /legal/license.txt).
16:         * 
17:         * You should have received a copy of the GNU General Public License
18:         * version 2 along with this work; if not, write to the Free Software
19:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20:         * 02110-1301 USA
21:         * 
22:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23:         * Clara, CA 95054 or visit www.sun.com if you need additional
24:         * information or have any questions.
25:         */
26:
27:        package com.sun.kvem.midp.pim;
28:
29:        import java.util.Vector;
30:
31:        /**
32:         * Class KeySortUtility contains static method "store" only.
33:         * @see store 
34:         *
35:         */
36:        class KeySortUtility {
37:
38:            /**
39:             * Support method. Maintains a list, valueList, where each element in
40:             * the list has a corresponding key (of type Long) stored in keyList.
41:             * This method inserts "value" into "valueList" with the following
42:             * postconditions:
43:             * <ul>
44:             * <li> keyList.size() == valueList.size()
45:             * <li> keyList[i] corresponds to valueList[i] (0 <= i < keyList.size())
46:             * <li> keyList is in ascending order of keys
47:             * <li> keyList contains key
48:             * <li> valueList contains value
49:             * <li> key corresponds to value
50:             * </ul>
51:             * The following are preconditions:
52:             * <ul>
53:             * <li> keyList.size() == valueList.size()
54:             * <li> keyList[i] corresponds to valueList[i] (0 <= i < keyList.size())
55:             * <li> keyList is in ascending order of keys
56:             * </ul>
57:             * In order to maintain the arrays correctly, the objects passed as keyList
58:             * and valueList should <i>only</i> be modified by this method.
59:             * <p>Preconditions are not verified by this method.
60:             * @param keyList array or property names
61:             * @param valueList array of property values
62:             * @param key identifier for this list
63:             * @param value target object to store the list
64:             */
65:            static void store(Vector keyList, Vector valueList, long key,
66:                    Object value) {
67:                // do a binary chop search for the index before which to
68:                // insert value
69:                int lowerBound = 0;
70:                int upperBound = keyList.size();
71:                while (lowerBound != upperBound) {
72:                    int index = lowerBound + (upperBound - lowerBound) / 2;
73:                    long indexKey = ((Long) keyList.elementAt(index))
74:                            .longValue();
75:                    if (indexKey > key) {
76:                        if (index == upperBound) {
77:                            upperBound--;
78:                        } else {
79:                            upperBound = index;
80:                        }
81:                    } else {
82:                        if (index == lowerBound) {
83:                            lowerBound++;
84:                        } else {
85:                            lowerBound = index;
86:                        }
87:                    }
88:                }
89:                keyList.insertElementAt(new Long(key), lowerBound);
90:                valueList.insertElementAt(value, lowerBound);
91:            }
92:        }
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