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    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.
    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
    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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