org.eclipse.jdt.internal.core.util.LineNumberAttribute Maven / Gradle / Ivy
/*******************************************************************************
* 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.ILineNumberAttribute;
/**
* Default implementation of ILineNumberAttribute.
*/
public class LineNumberAttribute
extends ClassFileAttribute
implements ILineNumberAttribute {
private static final int[][] NO_ENTRIES = new int[0][0];
private int lineNumberTableLength;
private int[][] lineNumberTable;
/**
* Constructor for LineNumberAttribute.
* @param classFileBytes
* @param constantPool
* @param offset
* @throws ClassFormatException
*/
public LineNumberAttribute(
byte[] classFileBytes,
IConstantPool constantPool,
int offset)
throws ClassFormatException {
super(classFileBytes, constantPool, offset);
final int length = u2At(classFileBytes, 6, offset);
this.lineNumberTableLength = length;
if (length != 0) {
this.lineNumberTable = new int[length][2];
int readOffset = 8;
for (int i = 0; i < length; i++) {
this.lineNumberTable[i][0] = u2At(classFileBytes, readOffset, offset);
this.lineNumberTable[i][1] = u2At(classFileBytes, readOffset + 2, offset);
readOffset += 4;
}
} else {
this.lineNumberTable = NO_ENTRIES;
}
}
/**
* @see ILineNumberAttribute#getLineNumberTable()
*/
public int[][] getLineNumberTable() {
return this.lineNumberTable;
}
/**
* @see ILineNumberAttribute#getLineNumberTableLength()
*/
public int getLineNumberTableLength() {
return this.lineNumberTableLength;
}
}