Copyright (c) 2000, 2009 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2009 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * 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.
/**
 * 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.
Params:
classFileBytes – 
constantPool – 
offset – 
Throws:
ClassFormatException – /**
	 * 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 Also:
getLineNumberTable.getLineNumberTable()/**
	 * @see ILineNumberAttribute#getLineNumberTable()
	 */
	@Override
	public int[][] getLineNumberTable() {
		return this.lineNumberTable;
	}

	
See Also:
getLineNumberTableLength.getLineNumberTableLength()/**
	 * @see ILineNumberAttribute#getLineNumberTableLength()
	 */
	@Override
	public int getLineNumberTableLength() {
		return this.lineNumberTableLength;
	}

}