package org.aspectj.apache.bcel.classfile;

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 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * ====================================================================
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 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import org.aspectj.apache.bcel.Constants;

This class is derived from Attribute and represents a reference to the source file of this class. At most one SourceFile
attribute should appear per classfile. The intention of this class is that it is instantiated from the
Attribute.readAttribute() method.
Author:
M. Dahm
See Also:
Attribute
Version:
$Id: SourceFile.java,v 1.5 2009/09/15 19:40:12 aclement Exp $/**
 * This class is derived from <em>Attribute</em> and represents a reference to the source file of this class. At most one SourceFile
 * attribute should appear per classfile. The intention of this class is that it is instantiated from the
 * <em>Attribute.readAttribute()</em> method.
 * 
 * @version $Id: SourceFile.java,v 1.5 2009/09/15 19:40:12 aclement Exp $
 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 * @see Attribute
 */
public final class SourceFile extends Attribute {
	private int sourcefile_index;

	
Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical
copy.
/**
	 * Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical
	 * copy.
	 */
	public SourceFile(SourceFile c) {
		this(c.getNameIndex(), c.getLength(), c.getSourceFileIndex(), c.getConstantPool());
	}

	
Construct object from file stream.
Params:
name_index – Index in constant pool to CONSTANT_Utf8
length – Content length in bytes
file – Input stream
constant_pool – Array of constants
Throws:
IOException – /**
	 * Construct object from file stream.
	 * 
	 * @param name_index Index in constant pool to CONSTANT_Utf8
	 * @param length Content length in bytes
	 * @param file Input stream
	 * @param constant_pool Array of constants
	 * @throws IOException
	 */
	SourceFile(int name_index, int length, DataInputStream file, ConstantPool constant_pool) throws IOException {
		this(name_index, length, file.readUnsignedShort(), constant_pool);
	}

	
Params:
name_index – Index in constant pool to CONSTANT_Utf8, which should represent the string "SourceFile".
length – Content length in bytes, the value should be 2.
constant_pool – The constant pool that this attribute is associated with.
sourcefile_index – Index in constant pool to CONSTANT_Utf8. This string will be interpreted as the name of the file from
       which this class was compiled. It will not be interpreted as indicating the name of the directory contqining the file
       or an absolute path; this information has to be supplied the consumer of this attribute - in many cases, the JVM./**
	 * @param name_index Index in constant pool to CONSTANT_Utf8, which should represent the string "SourceFile".
	 * @param length Content length in bytes, the value should be 2.
	 * @param constant_pool The constant pool that this attribute is associated with.
	 * @param sourcefile_index Index in constant pool to CONSTANT_Utf8. This string will be interpreted as the name of the file from
	 *        which this class was compiled. It will not be interpreted as indicating the name of the directory contqining the file
	 *        or an absolute path; this information has to be supplied the consumer of this attribute - in many cases, the JVM.
	 */
	public SourceFile(int name_index, int length, int sourcefile_index, ConstantPool constant_pool) {
		super(Constants.ATTR_SOURCE_FILE, name_index, length, constant_pool);
		this.sourcefile_index = sourcefile_index;
	}

	
Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
Params:
v – Visitor object/**
	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
	 * 
	 * @param v Visitor object
	 */
	@Override
	public void accept(ClassVisitor v) {
		v.visitSourceFile(this);
	}

	
Dump source file attribute to file stream in binary format.
Params:
file – Output file stream
Throws:
IOException – /**
	 * Dump source file attribute to file stream in binary format.
	 * 
	 * @param file Output file stream
	 * @throws IOException
	 */
	@Override
	public final void dump(DataOutputStream file) throws IOException {
		super.dump(file);
		file.writeShort(sourcefile_index);
	}

	
Returns:
Index in constant pool of source file name./**
	 * @return Index in constant pool of source file name.
	 */
	public final int getSourceFileIndex() {
		return sourcefile_index;
	}

	
@param
sourcefile_index./**
	 * @param sourcefile_index.
	 */
	public final void setSourceFileIndex(int sourcefile_index) {
		this.sourcefile_index = sourcefile_index;
	}

	
Returns:
Source file name./**
	 * @return Source file name.
	 */
	public final String getSourceFileName() {
		ConstantUtf8 c = (ConstantUtf8) cpool.getConstant(sourcefile_index, Constants.CONSTANT_Utf8);
		return c.getValue();
	}

	
Returns:
String representation/**
	 * @return String representation
	 */
	@Override
	public final String toString() {
		return "SourceFile(" + getSourceFileName() + ")";
	}

	/**
	 * @return deep copy of this attribute //
	 */
	// @Override
	// public Attribute copy(ConstantPool constant_pool) {
	// return (SourceFile) clone();
	// }
}