1 package org.apache.bcel.generic;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache BCEL" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache BCEL", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56 import org.apache.bcel.Constants;
57 import org.apache.bcel.Repository;
58 import org.apache.bcel.classfile.JavaClass;
59
60 /***
61 * Denotes reference such as java.lang.String.
62 *
63 * @version $Id: ObjectType.java,v 1.1.1.1 2001/10/29 20:00:25 jvanzyl Exp $
64 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
65 */
66 public final class ObjectType extends ReferenceType {
67 private String class_name; // Class name of type
68
69 /***
70 * @param class_name fully qualified class name, e.g. java.lang.String
71 */
72 public ObjectType(String class_name) {
73 super(Constants.T_REFERENCE, "L" + class_name.replace('.', '/') + ";");
74 this.class_name = class_name.replace('/', '.');
75 }
76
77 /*** @return name of referenced class
78 */
79 public String getClassName() { return class_name; }
80
81 /*** @return a hash code value for the object.
82 */
83 public int hashCode() { return class_name.hashCode(); }
84
85 /*** @return true if both type objects refer to the same class.
86 */
87 public boolean equals(Object type) {
88 return (type instanceof ObjectType)?
89 ((ObjectType)type).class_name.equals(class_name) : false;
90 }
91
92 /***
93 * If "this" doesn't reference a class, it references an interface
94 * or a non-existant entity.
95 */
96 public boolean referencesClass(){
97 JavaClass jc = Repository.lookupClass(class_name);
98 if (jc == null)
99 return false;
100 else
101 return jc.isClass();
102 }
103
104 /***
105 * If "this" doesn't reference an interface, it references a class
106 * or a non-existant entity.
107 */
108 public boolean referencesInterface(){
109 JavaClass jc = Repository.lookupClass(class_name);
110 if (jc == null)
111 return false;
112 else
113 return !jc.isClass();
114 }
115
116 public boolean subclassOf(ObjectType superclass){
117 if (this.referencesInterface() || superclass.referencesInterface())
118 return false;
119
120 return Repository.instanceOf(this.class_name, superclass.class_name);
121 }
122
123 /***
124 * Java Virtual Machine Specification edition 2, § 5.4.4 Access Control
125 */
126 public boolean accessibleTo(ObjectType accessor) {
127 JavaClass jc = Repository.lookupClass(class_name);
128
129 if(jc.isPublic()) {
130 return true;
131 } else {
132 JavaClass acc = Repository.lookupClass(accessor.class_name);
133 return acc.getPackageName().equals(jc.getPackageName());
134 }
135 }
136 }
This page was automatically generated by Maven