/*
 * Copyright (c) 1996-2001
 * Logica Mobile Networks Limited
 * All rights reserved.
 *
 * This software is distributed under Logica Open Source License Version 1.0
 * ("Licence Agreement"). You shall use it and distribute only in accordance
 * with the terms of the License Agreement.
 *
 */
package org.smpp.pdu.tlv;

import org.smpp.util.ByteBuffer;
import org.smpp.pdu.ValueNotSetException;
import org.smpp.pdu.tlv.WrongLengthException;

/**
 * @author Logica Mobile Networks SMPP Open Source Team
 * @version $Revision: 1.1 $
 */
public class TLVEmpty extends TLV {
	private boolean present = false;

	public TLVEmpty() {
		super(0, 0);
	}

	public TLVEmpty(short p_tag) {
		super(p_tag, 0, 0);
	}

	public TLVEmpty(short p_tag, boolean p_present) {
		super(p_tag, 0, 0);
		present = p_present;
		markValueSet();
	}

	public ByteBuffer getValueData() {
		// nothing, just present or not
		return null;
	}

	public void setValueData(ByteBuffer buffer) throws WrongLengthException {
		// nothing, just set presence
		checkLength(buffer);
		setValue(true);
	}

	public void setValue(boolean p_present) {
		present = p_present;
		markValueSet();
	}

	public boolean getValue() throws ValueNotSetException {
		if (hasValue()) {
			return present;
		} else {
			throw new ValueNotSetException();
		}
	}

	public String debugString() {
		String dbgs = "(empty: ";
		dbgs += super.debugString();
		dbgs += ") ";
		return dbgs;
	}
}
/*
 * $Log: TLVEmpty.java,v $
 * Revision 1.1  2003/07/23 00:28:39  sverkera
 * Imported
 *
 */