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      1 /* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
      2  *
      3  * This program and the accompanying materials are made available under
      4  * the terms of the Common Public License v1.0 which accompanies this distribution,
      5  * and is available at http://www.eclipse.org/legal/cpl-v10.html
      6  *
      7  * $Id: SyntheticAttribute_info.java,v 1.1.1.1.2.1 2004/07/10 03:34:52 vlad_r Exp $
      8  */
      9 package com.vladium.jcd.cls.attribute;
     10 
     11 import java.io.IOException;
     12 
     13 import com.vladium.jcd.lib.UDataOutputStream;
     14 
     15 // ----------------------------------------------------------------------------
     16 /**
     17  * The Synthetic attribute is a fixed-length attribute in the attributes table
     18  * of ClassFile, {@link com.vladium.jcd.cls.Field_info}, and
     19  * {@link com.vladium.jcd.cls.Method_info} structures. A class member that does
     20  * not appear in the source code must be marked using a Synthetic attribute.<P>
     21  *
     22  * The Synthetic attribute has the following format:
     23  * <PRE>
     24  * Synthetic_attribute {
     25  *          u2 attribute_name_index;
     26  *          u4 attribute_length;
     27  * }
     28  * </PRE>
     29  *
     30  * The value of the attribute_name_index item must be a valid index into the
     31  * constant_pool table. The constant_pool entry at that index must be a CONSTANT_Utf8_info
     32  * structure representing the string "Synthetic".<P>
     33  *
     34  * The value of the attribute_length item is zero.
     35  *
     36  * @author (C) 2001, Vlad Roubtsov
     37  */
     38 public
     39 final class SyntheticAttribute_info extends Attribute_info
     40 {
     41     // public: ................................................................
     42 
     43 
     44     public SyntheticAttribute_info (final int attribute_name_index)
     45     {
     46         super (attribute_name_index, 0);
     47     }
     48 
     49 
     50     public long length ()
     51     {
     52         return 6;
     53     }
     54 
     55     // Visitor:
     56 
     57     public void accept (final IAttributeVisitor visitor, final Object ctx)
     58     {
     59         visitor.visit (this, ctx);
     60     }
     61 
     62     public String toString ()
     63     {
     64         return "SyntheticValueAttribute_info: [attribute_name_index = " + m_name_index + ", attribute_length = " + m_attribute_length + ']';
     65     }
     66 
     67     // Cloneable:
     68 
     69     /**
     70      * Performs a deep copy.
     71      */
     72     public Object clone ()
     73     {
     74         return super.clone ();
     75     }
     76 
     77     // IClassFormatOutput:
     78 
     79     public void writeInClassFormat (final UDataOutputStream out) throws IOException
     80     {
     81         super.writeInClassFormat (out);
     82     }
     83 
     84     // protected: .............................................................
     85 
     86     // package: ...............................................................
     87 
     88 
     89     SyntheticAttribute_info (final int attribute_name_index, final long attribute_length)
     90     {
     91         super (attribute_name_index, attribute_length);
     92     }
     93 
     94     // private: ...............................................................
     95 
     96 } // end of class
     97 // ----------------------------------------------------------------------------
     98 
     99