1   package org.apache.bcel.classfile;
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.
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37   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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39   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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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  
57  import  org.apache.bcel.Constants;
58  
59  /***
60   * Super class for all objects that have modifiers like private, final, ...
61   * I.e. classes, fields, and methods.
62   *
63   * @version $Id: AccessFlags.java,v 1.3 2002/07/11 19:39:04 mdahm Exp $
64   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
65   */
66  public abstract class AccessFlags implements java.io.Serializable {
67    protected int access_flags;
68    
69    public AccessFlags() {}
70  
71    /***
72     * @param a inital access flags
73     */
74    public AccessFlags(int a) {
75      access_flags = a;
76    }
77  
78    /*** 
79     * @return Access flags of the object aka. "modifiers".
80     */ 
81    public final int getAccessFlags() { return access_flags; }
82  
83    /*** 
84     * @return Access flags of the object aka. "modifiers".
85     */ 
86    public final int getModifiers() { return access_flags; }
87  
88    /*** Set access flags aka "modifiers".
89     * @param access_flags Access flags of the object. 
90     */
91    public final void setAccessFlags(int access_flags) {
92      this.access_flags = access_flags;
93    }
94  
95    /*** Set access flags aka "modifiers".
96     * @param access_flags Access flags of the object. 
97     */
98    public final void setModifiers(int access_flags) {
99      setAccessFlags(access_flags);
100   }
101 
102   private final void setFlag(int flag, boolean set) {
103     if((access_flags & flag) != 0) { // Flag is set already
104       if(!set) // Delete flag ?
105 	access_flags ^= flag;
106     } else {   // Flag not set
107       if(set)  // Set flag ?
108 	access_flags |= flag;
109     }
110   }
111 
112   public final void isPublic(boolean flag) { setFlag(Constants.ACC_PUBLIC, flag); }
113   public final boolean isPublic() {
114     return (access_flags & Constants.ACC_PUBLIC) != 0;
115   }
116 
117   public final void isPrivate(boolean flag) { setFlag(Constants.ACC_PRIVATE, flag); }
118   public final boolean isPrivate() {
119     return (access_flags & Constants.ACC_PRIVATE) != 0;
120   }
121 
122   public final void isProtected(boolean flag) { setFlag(Constants.ACC_PROTECTED, flag); }
123   public final boolean isProtected() {
124     return (access_flags & Constants.ACC_PROTECTED) != 0;
125   }
126 
127   public final void isStatic(boolean flag) { setFlag(Constants.ACC_STATIC, flag); }
128   public final boolean isStatic() {
129     return (access_flags & Constants.ACC_STATIC) != 0;
130   }
131 
132   public final void isFinal(boolean flag) { setFlag(Constants.ACC_FINAL, flag); }
133   public final boolean isFinal() {
134     return (access_flags & Constants.ACC_FINAL) != 0;
135   }
136 
137   public final void isSynchronized(boolean flag) { setFlag(Constants.ACC_SYNCHRONIZED, flag); }
138   public final boolean isSynchronized() {
139     return (access_flags & Constants.ACC_SYNCHRONIZED) != 0;
140   }
141 
142   public final void isVolatile(boolean flag) { setFlag(Constants.ACC_VOLATILE, flag); }
143   public final boolean isVolatile() {
144     return (access_flags & Constants.ACC_VOLATILE) != 0;
145   }
146 
147   public final void isTransient(boolean flag) { setFlag(Constants.ACC_TRANSIENT, flag); }
148   public final boolean isTransient() {
149     return (access_flags & Constants.ACC_TRANSIENT) != 0;
150   }
151 
152   public final void isNative(boolean flag) { setFlag(Constants.ACC_NATIVE, flag); }
153   public final boolean isNative() {
154     return (access_flags & Constants.ACC_NATIVE) != 0;
155   }
156 
157   public final void isInterface(boolean flag) { setFlag(Constants.ACC_INTERFACE, flag); }
158   public final boolean isInterface() {
159     return (access_flags & Constants.ACC_INTERFACE) != 0;
160   }
161 
162   public final void isAbstract(boolean flag) { setFlag(Constants.ACC_ABSTRACT, flag); }
163   public final boolean isAbstract() {
164     return (access_flags & Constants.ACC_ABSTRACT) != 0;
165   }
166 
167   public final void isStrictfp(boolean flag) { setFlag(Constants.ACC_STRICT, flag); }
168   public final boolean isStrictfp() {
169     return (access_flags & Constants.ACC_STRICT) != 0;
170   }
171 }
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