Source Code Cross Referenced for TermComparator.java in  » ERP-CRM-Financial » sakai » org » theospi » portfolio » help » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » sakai » org.theospi.portfolio.help.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /**********************************************************************************
02:         * $URL:https://source.sakaiproject.org/svn/osp/trunk/glossary/api-impl/src/java/org/theospi/portfolio/help/model/TermComparator.java $
03:         * $Id:TermComparator.java 9134 2006-05-08 20:28:42Z chmaurer@iupui.edu $
04:         ***********************************************************************************
05:         *
06:         * Copyright (c) 2005, 2006 The Sakai Foundation.
07:         *
08:         * Licensed under the Educational Community License, Version 1.0 (the "License");
09:         * you may not use this file except in compliance with the License.
10:         * You may obtain a copy of the License at
11:         *
12:         *      http://www.opensource.org/licenses/ecl1.php
13:         *
14:         * Unless required by applicable law or agreed to in writing, software
15:         * distributed under the License is distributed on an "AS IS" BASIS,
16:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17:         * See the License for the specific language governing permissions and
18:         * limitations under the License.
19:         *
20:         **********************************************************************************/package org.theospi.portfolio.help.model;
21:
22:        import java.util.Comparator;
23:
24:        import org.apache.commons.logging.Log;
25:        import org.apache.commons.logging.LogFactory;
26:
27:        public class TermComparator implements  Comparator {
28:            protected final transient Log logger = LogFactory
29:                    .getLog(getClass());
30:
31:            /**
32:             * Compares its two arguments for order.  Returns a negative integer,
33:             * zero, or a positive integer as the first argument is less than, equal
34:             * to, or greater than the second.<p>
35:             * <p/>
36:             * The implementor must ensure that <tt>sgn(compare(x, y)) ==
37:             * -sgn(compare(y, x))</tt> for all <tt>x</tt> and <tt>y</tt>.  (This
38:             * implies that <tt>compare(x, y)</tt> must throw an exception if and only
39:             * if <tt>compare(y, x)</tt> throws an exception.)<p>
40:             * <p/>
41:             * The implementor must also ensure that the relation is transitive:
42:             * <tt>((compare(x, y)&gt;0) &amp;&amp; (compare(y, z)&gt;0))</tt> implies
43:             * <tt>compare(x, z)&gt;0</tt>.<p>
44:             * <p/>
45:             * Finally, the implementer must ensure that <tt>compare(x, y)==0</tt>
46:             * implies that <tt>sgn(compare(x, z))==sgn(compare(y, z))</tt> for all
47:             * <tt>z</tt>.<p>
48:             * <p/>
49:             * It is generally the case, but <i>not</i> strictly required that
50:             * <tt>(compare(x, y)==0) == (x.equals(y))</tt>.  Generally speaking,
51:             * any comparator that violates this condition should clearly indicate
52:             * this fact.  The recommended language is "Note: this comparator
53:             * imposes orderings that are inconsistent with equals."
54:             *
55:             * @param o1 the first object to be compared.
56:             * @param o2 the second object to be compared.
57:             * @return a negative integer, zero, or a positive integer as the
58:             *         first argument is less than, equal to, or greater than the
59:             *         second.
60:             * @throws ClassCastException if the arguments' types prevent them from
61:             *                            being compared by this Comparator.
62:             */
63:            public int compare(Object o1, Object o2) {
64:                String entry1 = o1.toString();
65:                String entry2 = o2.toString();
66:
67:                return entry1.compareToIgnoreCase(entry2);
68:            }
69:        }
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