/*
 * SourceFileAttribute.java
 *
 * Created on June 2nd, 1999
 *
 * Modification Log:
 * 1.00 02nd Jun 1999 Tanmay Original Version
 * 1.01 12th Jun 1999 Tanmay Methods to verify and get text summary added.
 * 1.02 20th Jan 2002 Tanmay Implemented Attribute interface
 *-----------------------------------------------------------------------------------------
 * 10th Sep 2003 Tanmay Moved to SourceForge (http://classeditor.sourceforge.net)
 *-----------------------------------------------------------------------------------------
 * 1.03 28th Sep 2003 Tanmay Moved text summary method to visitor.
 */

package classfile.attributes;

import classfile.Utils;
import classfile.ConstantPoolInfo;
import classfile.ConstantPool;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Vector;


/**
 * Class to handle the source file attribute.
 *<br><br>
 *
 * @author 	 Tanmay K. Mohapatra
 * @version 1.03, 28th Sep, 2003
 */

public class SourceFileAttribute extends Attribute {
 int iSourceFileIndex; // points to a UTF8
 public ConstantPoolInfo cpSourceFile; // is a UTF8
 
 public SourceFileAttribute() {
 sName = Attribute.SOURCE_FILE;
 }
 
 void readAttributeDetails(DataInputStream dis, ConstantPool constPool) throws IOException {
 iAttribLength = dis.readInt();
 iSourceFileIndex = dis.readUnsignedShort();
 cpSourceFile = constPool.getPoolInfo(iSourceFileIndex);
 cpSourceFile.addRef();
 }
 
 void writeAttributeDetails(DataOutputStream dos, ConstantPool constPool) throws IOException {
 dos.writeInt(iAttribLength);
 iSourceFileIndex = constPool.getIndexOf(cpSourceFile);
 dos.writeShort(iSourceFileIndex);
 }
 
 public String toString() {
 return "Attribute " + sName + ". Source=" + cpSourceFile.sUTFStr;
 }
 
 public boolean verify(String sPrepend, Vector vectVerifyErrors) {
 if ( (null == cpSourceFile) || (ConstantPoolInfo.CONSTANT_Utf8 != cpSourceFile.iTag) ) {
 vectVerifyErrors.addElement(sPrepend + ": Should point to a UTF8 constant pool.");
 return false;
 }
 return true;
 }
}