model/org/eclipse/jdt/internal/core/util/SourceFileAttribute.java

/**********************************************************************
Copyright (c) 2002 IBM Corp. and others.
All rights reserved.   This program and the accompanying materials
are made available under the terms of the Common Public License v0.5
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v05.html
 
Contributors:
     IBM Corporation - initial API and implementation
**********************************************************************/

package org.eclipse.jdt.internal.core.util;

import org.eclipse.jdt.core.util.ClassFormatException;
import org.eclipse.jdt.core.util.IAttributeNamesConstants;
import org.eclipse.jdt.core.util.IConstantPool;
import org.eclipse.jdt.core.util.IConstantPoolConstant;
import org.eclipse.jdt.core.util.IConstantPoolEntry;
import org.eclipse.jdt.core.util.ISourceAttribute;

/**
 * Default implementation of ISourceAttribute
 */
public class SourceFileAttribute
	extends ClassFileAttribute
	implements ISourceAttribute {

	private int sourceFileIndex;
	private char[] sourceFileName;
	
	/**
	 * Constructor for SourceFileAttribute.
	 * @param classFileBytes
	 * @param constantPool
	 * @param offset
	 * @throws ClassFormatException
	 */
	public SourceFileAttribute(
		byte[] classFileBytes,
		IConstantPool constantPool,
		int offset)
		throws ClassFormatException {
		super(classFileBytes, constantPool, offset);
		this.sourceFileIndex = u2At(classFileBytes, 6, offset);
		IConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(this.sourceFileIndex);
		if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
			throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
		}
		this.sourceFileName = constantPoolEntry.getUtf8Value();
	}

	/**
	 * @see org.eclipse.jdt.core.util.IClassFileAttribute#getAttributeName()
	 */
	public char[] getAttributeName() {
		return IAttributeNamesConstants.SOURCE;
	}

	/**
	 * @see ISourceAttribute#getSourceFileIndex()
	 */
	public int getSourceFileIndex() {
		return this.sourceFileIndex;
	}

	/**
	 * @see ISourceAttribute#getSourceFileName()
	 */
	public char[] getSourceFileName() {
		return this.sourceFileName;
	}

}