/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.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.IStackMapFrame;
import org.eclipse.jdt.core.util.IStackMapTableAttribute;
/**
* Default implementation of IStackMapTableAttribute.
*
* @see IStackMapTableAttribute
*/
public class StackMapTableAttribute
extends ClassFileAttribute
implements IStackMapTableAttribute {
private static final IStackMapFrame[] NO_FRAMES= new IStackMapFrame[0];
private static final byte[] NO_ENTRIES= new byte[0];
private int numberOfEntries;
private IStackMapFrame[] frames;
private byte[] bytes;
/**
* Constructor for LineNumberAttribute.
*
* @param classFileBytes
* @param constantPool
* @param offset
* @throws ClassFormatException
*/
public StackMapTableAttribute(
byte[] classFileBytes,
IConstantPool constantPool,
int offset)
throws ClassFormatException {
super(classFileBytes, constantPool, offset);
final int length= u2At(classFileBytes, 6, offset);
this.numberOfEntries= length;
if (length != 0) {
int readOffset= 8;
this.frames= new IStackMapFrame[length];
for (int i= 0; i < length; i++) {
StackMapFrame frame= new StackMapFrame(classFileBytes, constantPool, offset + readOffset);
this.frames[i]= frame;
readOffset+= frame.sizeInBytes();
}
} else {
this.frames= NO_FRAMES;
}
final int byteLength= (int)u4At(classFileBytes, 2, offset);
if (length != 0) {
System.arraycopy(classFileBytes, offset + 6, this.bytes= new byte[byteLength], 0, byteLength);
} else {
this.bytes= NO_ENTRIES;
}
}
public int getNumberOfEntries() {
return this.numberOfEntries;
}
public IStackMapFrame[] getStackMapFrame() {
return this.frames;
}
/**
*/
public byte[] getBytes() {
return this.bytes;
}
}