Home | History | Annotate | Download | only in bytecode 
      1 /*
      2  * Javassist, a Java-bytecode translator toolkit.
      3  * Copyright (C) 1999-2007 Shigeru Chiba. All Rights Reserved.
      4  *
      5  * The contents of this file are subject to the Mozilla Public License Version
      6  * 1.1 (the "License"); you may not use this file except in compliance with
      7  * the License.  Alternatively, the contents of this file may be used under
      8  * the terms of the GNU Lesser General Public License Version 2.1 or later.
      9  *
     10  * Software distributed under the License is distributed on an "AS IS" basis,
     11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
     12  * for the specific language governing rights and limitations under the
     13  * License.
     14  */
     15 
     16 package javassist.bytecode;
     17 
     18 import java.io.DataInputStream;
     19 import java.io.IOException;
     20 import java.util.Map;
     21 
     22 /**
     23  * <code>SourceFile_attribute</code>.
     24  */
     25 public class SourceFileAttribute extends AttributeInfo {
     26     /**
     27      * The name of this attribute <code>"SourceFile"</code>.
     28      */
     29     public static final String tag = "SourceFile";
     30 
     31     SourceFileAttribute(ConstPool cp, int n, DataInputStream in)
     32         throws IOException
     33     {
     34         super(cp, n, in);
     35     }
     36 
     37     /**
     38      * Constructs a SourceFile attribute.
     39      *
     40      * @param cp                a constant pool table.
     41      * @param filename          the name of the source file.
     42      */
     43     public SourceFileAttribute(ConstPool cp, String filename) {
     44         super(cp, tag);
     45         int index = cp.addUtf8Info(filename);
     46         byte[] bvalue = new byte[2];
     47         bvalue[0] = (byte)(index >>> 8);
     48         bvalue[1] = (byte)index;
     49         set(bvalue);
     50     }
     51 
     52     /**
     53      * Returns the file name indicated by <code>sourcefile_index</code>.
     54      */
     55     public String getFileName() {
     56         return getConstPool().getUtf8Info(ByteArray.readU16bit(get(), 0));
     57     }
     58 
     59     /**
     60      * Makes a copy.  Class names are replaced according to the
     61      * given <code>Map</code> object.
     62      *
     63      * @param newCp     the constant pool table used by the new copy.
     64      * @param classnames        pairs of replaced and substituted
     65      *                          class names.
     66      */
     67     public AttributeInfo copy(ConstPool newCp, Map classnames) {
     68         return new SourceFileAttribute(newCp, getFileName());
     69     }
     70 }
     71