KickJava   Java API By Example, From Geeks To Geeks.

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


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
20 package org.netbeans.modules.javacore.parser;
21
22 import java.util.*;
23 import org.netbeans.api.java.classpath.ClassPath;
24 import org.netbeans.jmi.javamodel.JavaClass;
25 import org.netbeans.modules.javacore.ClassIndex;
26
27 /**
28  * @author Tomas Hurka
29  */
30 class PackageImpScope implements ScopeMember {
31     private String JavaDoc jPackage;
32     private ClassPath classPath;
33     private Map positiveCache;
34     private Set negativeCache;
35
36     /** Creates a new instance of PackageImpScope */
37     PackageImpScope(String JavaDoc pack,ClassPath cp) {
38         jPackage=pack.length()>0?pack.concat("."):pack; // NOI18N
39 classPath=cp;
40         positiveCache=new HashMap();
41         negativeCache=new HashSet();
42     }
43     
44     public Object JavaDoc lookup(Object JavaDoc key) {
45         Object JavaDoc val;
46         String JavaDoc className;
47         JavaClass jcls;
48         
49         if (negativeCache.contains(key))
50             return null;
51         val=positiveCache.get(key);
52         if (val!=null)
53             return val;
54         className=jPackage.concat((String JavaDoc)key);
55         jcls=ClassIndex.getClassByFqn(className,classPath);
56         if (jcls!=null) {
57             String JavaDoc name=jcls.getName();
58             
59             positiveCache.put(key, name);
60             return name;
61         }
62         negativeCache.add(key);
63         return null;
64     }
65 }
66
Popular Tags