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Java > Open Source Codes > org > netbeans > modules > javacore > parser > MethodInfoMeasure


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19 package org.netbeans.modules.javacore.parser;
20
21 import org.netbeans.modules.javacore.jmiimpl.javamodel.MethodImpl;
22
23
24 /**
25  *
26  * @author Tomas Hurka
27  */
28 class MethodInfoMeasure implements Measure {
29     public static final MethodInfoMeasure INSTANCE = new MethodInfoMeasure();
30
31     private static final int NAME_WEIGHT = 60;
32     private static final int PARAMETERS_WEIGHT = 40;
33
34     /** Creates a new instance of ClassMeasure */
35     private MethodInfoMeasure() {
36     }
37
38     /** Compares Java Method to ASTree object.
39      * @param refObject Must be Java Method
40      * @param asTree
41      * @return distance
42      */
43     public int getDistance(Object JavaDoc refObject, Object JavaDoc ast) {
44         if (ast instanceof MethodInfo) {
45             MethodInfo astInfo = (MethodInfo) ast;
46             MethodImpl refInfo = (MethodImpl) refObject;
47             int result;
48             TypeRef[] refTypeNames;
49             TypeRef[] astTypeNames;
50             
51             if (astInfo.infoType!=MethodInfo.METHOD_TYPE)
52                 return INFINITE_DISTANCE;
53             result = StringMeasure.INSTANCE.getDistance(refInfo.getName(), astInfo.name) * NAME_WEIGHT;
54             
55             if (refInfo.isPersisted()) {
56                 refTypeNames = InfoUtil.getTypeNames(refInfo);
57                 astTypeNames = InfoUtil.getTypeNames(astInfo.parameters);
58                 result += new OrderedArrayMeasure(ClassNameMeasure.INSTANCE).getDistance(refTypeNames, astTypeNames) * PARAMETERS_WEIGHT;
59             }
60             result/=100;
61             return result > INFINITE_DISTANCE ? INFINITE_DISTANCE : result;
62         }
63         return INFINITE_DISTANCE;
64     }
65 }
66
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