/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   */
  package org.apache.bcel.classfile;
  
  import org.apache.bcel.Constants;
  
  /**
   * Super class for all objects that have modifiers like private, final, ...
   * I.e. classes, fields, and methods.
   *
   * @version $Id: AccessFlags.java 992350 2010-09-03 16:18:20Z markt $
   * @author  <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
   */
  public abstract class AccessFlags implements java.io.Serializable {
  
      private static final long serialVersionUID = 2845404654039163061L;
      protected int access_flags;
  
  
      public AccessFlags() {
      }
  
  
      /**
       * @param a inital access flags
       */
      public AccessFlags(int a) {
          access_flags = a;
      }
  
  
      /** 
       * @return Access flags of the object aka. "modifiers".
       */
      public final int getAccessFlags() {
          return access_flags;
      }
  
  
      /** 
       * @return Access flags of the object aka. "modifiers".
       */
      public final int getModifiers() {
          return access_flags;
      }
  
  
      /** Set access flags aka "modifiers".
       * @param access_flags Access flags of the object. 
       */
      public final void setAccessFlags( int access_flags ) {
          this.access_flags = access_flags;
      }
  
  
      /** Set access flags aka "modifiers".
       * @param access_flags Access flags of the object. 
       */
      public final void setModifiers( int access_flags ) {
          setAccessFlags(access_flags);
      }
  
  
      private final void setFlag( int flag, boolean set ) {
          if ((access_flags & flag) != 0) { // Flag is set already
              if (!set) {
                  access_flags ^= flag;
              }
          } else { // Flag not set
              if (set) {
                  access_flags |= flag;
              }
          }
      }
  
  
      public final void isPublic( boolean flag ) {
          setFlag(Constants.ACC_PUBLIC, flag);
      }
  
  
      public final boolean isPublic() {
          return (access_flags & Constants.ACC_PUBLIC) != 0;
      }
 
 
     public final void isPrivate( boolean flag ) {
         setFlag(Constants.ACC_PRIVATE, flag);
     }
 
 
     public final boolean isPrivate() {
         return (access_flags & Constants.ACC_PRIVATE) != 0;
     }
 
 
     public final void isProtected( boolean flag ) {
         setFlag(Constants.ACC_PROTECTED, flag);
     }
 
 
     public final boolean isProtected() {
         return (access_flags & Constants.ACC_PROTECTED) != 0;
     }
 
 
     public final void isStatic( boolean flag ) {
         setFlag(Constants.ACC_STATIC, flag);
     }
 
 
     public final boolean isStatic() {
         return (access_flags & Constants.ACC_STATIC) != 0;
     }
 
 
     public final void isFinal( boolean flag ) {
         setFlag(Constants.ACC_FINAL, flag);
     }
 
 
     public final boolean isFinal() {
         return (access_flags & Constants.ACC_FINAL) != 0;
     }
 
 
     public final void isSynchronized( boolean flag ) {
         setFlag(Constants.ACC_SYNCHRONIZED, flag);
     }
 
 
     public final boolean isSynchronized() {
         return (access_flags & Constants.ACC_SYNCHRONIZED) != 0;
     }
 
 
     public final void isVolatile( boolean flag ) {
         setFlag(Constants.ACC_VOLATILE, flag);
     }
 
 
     public final boolean isVolatile() {
         return (access_flags & Constants.ACC_VOLATILE) != 0;
     }
 
 
     public final void isTransient( boolean flag ) {
         setFlag(Constants.ACC_TRANSIENT, flag);
     }
 
 
     public final boolean isTransient() {
         return (access_flags & Constants.ACC_TRANSIENT) != 0;
     }
 
 
     public final void isNative( boolean flag ) {
         setFlag(Constants.ACC_NATIVE, flag);
     }
 
 
     public final boolean isNative() {
         return (access_flags & Constants.ACC_NATIVE) != 0;
     }
 
 
     public final void isInterface( boolean flag ) {
         setFlag(Constants.ACC_INTERFACE, flag);
     }
 
 
     public final boolean isInterface() {
         return (access_flags & Constants.ACC_INTERFACE) != 0;
     }
 
 
     public final void isAbstract( boolean flag ) {
         setFlag(Constants.ACC_ABSTRACT, flag);
     }
 
 
     public final boolean isAbstract() {
         return (access_flags & Constants.ACC_ABSTRACT) != 0;
     }
 
 
     public final void isStrictfp( boolean flag ) {
         setFlag(Constants.ACC_STRICT, flag);
     }
 
 
     public final boolean isStrictfp() {
         return (access_flags & Constants.ACC_STRICT) != 0;
     }
 
 
     public final void isSynthetic( boolean flag ) {
         setFlag(Constants.ACC_SYNTHETIC, flag);
     }
 
 
     public final boolean isSynthetic() {
         return (access_flags & Constants.ACC_SYNTHETIC) != 0;
     }
 
 
     public final void isAnnotation( boolean flag ) {
         setFlag(Constants.ACC_ANNOTATION, flag);
     }
 
 
     public final boolean isAnnotation() {
         return (access_flags & Constants.ACC_ANNOTATION) != 0;
     }
 
 
     public final void isEnum( boolean flag ) {
         setFlag(Constants.ACC_ENUM, flag);
     }
 
 
     public final boolean isEnum() {
         return (access_flags & Constants.ACC_ENUM) != 0;
     }
 }