/*
* @(#)SourceFileAttribute.java 1.11 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package components;
import java.io.DataOutput;
import java.io.DataInput;
import java.io.IOException;
import util.DataFormatException;
/*
* A class to represent the SourceFile Attribute
* of a class
*/
public
class SourceFileAttribute extends Attribute
{
public UnicodeConstant sourceName;
public
SourceFileAttribute( UnicodeConstant name, int l,
UnicodeConstant sourceName ) {
super( name, l );
this.sourceName = sourceName;
}
protected int
writeData( DataOutput o ) throws IOException{
o.writeShort( sourceName.index );
return 2;
}
public void
countConstantReferences( boolean isRelocatable ){
super.countConstantReferences( isRelocatable );
if (isRelocatable) {
sourceName.incReference();
}
}
/*
* This method can only be called at the very end of processing,
* just before output writing. We call sourceName.validate to make
* sure that the UnicodeConstant is not in the constant pool.
* Wc call super.validate so it can take care of the superclass fields.
*/
public void validate(){
super.validate();
sourceName.validate();
}
public static Attribute
readAttribute(DataInput i, ConstantObject constants[]) throws IOException{
UnicodeConstant name;
name = (UnicodeConstant)constants[i.readUnsignedShort()];
return finishReadAttribute(i, name, constants);
}
//
// for those cases where we already read the name index
// and know that its not something requiring special handling.
//
public static Attribute
finishReadAttribute(
DataInput i,
UnicodeConstant name,
ConstantObject constants[])
throws IOException
{
int l;
int n;
UnicodeConstant d;
l = i.readInt();
n = i.readUnsignedShort();
d = (UnicodeConstant)constants[n];
return new SourceFileAttribute(name, l, d);
}
}