model/org/eclipse/jdt/internal/core/util/ExceptionTableEntry.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.IConstantPool;
import org.eclipse.jdt.core.util.IConstantPoolConstant;
import org.eclipse.jdt.core.util.IConstantPoolEntry;
import org.eclipse.jdt.core.util.IExceptionTableEntry;

/**
 * This class describes an entry in the exception table attribute according
 * to the JVM specifications.
 */
public class ExceptionTableEntry
	extends ClassFileStruct
	implements IExceptionTableEntry {

	private int startPC;
	private int endPC;
	private int handlerPC;
	private int catchTypeIndex;
	private char[] catchType;
	
	ExceptionTableEntry(byte[] classFileBytes, IConstantPool constantPool, int offset) throws ClassFormatException {
		this.startPC = u2At(classFileBytes, 0, offset);
		this.endPC = u2At(classFileBytes, 2, offset);
		this.handlerPC = u2At(classFileBytes, 4, offset);
		this.catchTypeIndex = u2At(classFileBytes, 6, offset);
		if (this.catchTypeIndex != 0) {
			IConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(this.catchTypeIndex);
			if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Class) {
				throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
			}
			this.catchType = constantPoolEntry.getClassInfoName();
		}
	}
	/**
	 * @see IExceptionTableEntry#getStartPC()
	 */
	public int getStartPC() {
		return this.startPC;
	}

	/**
	 * @see IExceptionTableEntry#getEndPC()
	 */
	public int getEndPC() {
		return this.endPC;
	}

	/**
	 * @see IExceptionTableEntry#getHandlerPC()
	 */
	public int getHandlerPC() {
		return this.handlerPC;
	}

	/**
	 * @see IExceptionTableEntry#getCatchTypeIndex()
	 */
	public int getCatchTypeIndex() {
		return this.catchTypeIndex;
	}

	/**
	 * @see IExceptionTableEntry#getCatchType()
	 */
	public char[] getCatchType() {
		return this.catchType;
	}

}