/*
 * TeleStax, Open Source Cloud Communications
 * Copyright 2012, Telestax Inc and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

/**
 * Start time:11:31:36 2009-04-05<br>
 * Project: mobicents-isup-stack<br>
 *
 * @author <a href="mailto:baranowb@gmail.com"> Bartosz Baranowski
 *         </a>
 *
 */
package org.mobicents.protocols.ss7.isup.impl.message.parameter;

import org.mobicents.protocols.ss7.isup.ParameterException;
import org.mobicents.protocols.ss7.isup.message.parameter.LoopPreventionIndicators;

/**
 * Start time:11:31:36 2009-04-05<br>
 * Project: mobicents-isup-stack<br>
 *
 * @author <a href="mailto:baranowb@gmail.com"> Bartosz Baranowski </a>
 */
public class LoopPreventionIndicatorsImpl extends AbstractISUPParameter implements LoopPreventionIndicators {

    private static final int _TURN_ON = 1;
    private static final int _TURN_OFF = 0;

    private boolean response;
    private int responseIndicator;

    public LoopPreventionIndicatorsImpl() {
        super();

    }

    public LoopPreventionIndicatorsImpl(boolean response, int responseIndicator) {
        super();
        this.response = response;
        this.responseIndicator = responseIndicator;
    }

    public LoopPreventionIndicatorsImpl(byte[] b) throws ParameterException {
        super();
        decode(b);
    }

    public int decode(byte[] b) throws ParameterException {
        if (b == null || b.length != 1) {
            throw new ParameterException("byte[] must  not be null and length must  be 1");
        }

        this.response = (b[0] & 0x01) == _TURN_ON;

        if (response) {
            this.responseIndicator = (b[0] >> 1) & 0x03;
        }
        return 1;
    }

    public byte[] encode() throws ParameterException {
        int v = this.response ? _TURN_ON : _TURN_OFF;
        if (this.response) {
            v |= (this.responseIndicator & 0x03) << 1;
        }
        return new byte[] { (byte) v };
    }

    public boolean isResponse() {
        return response;
    }

    public void setResponse(boolean response) {
        this.response = response;
    }

    public int getResponseIndicator() {
        return responseIndicator;
    }

    public void setResponseIndicator(int responseIndicator) {
        this.responseIndicator = responseIndicator;
    }

    public int getCode() {

        return _PARAMETER_CODE;
    }
}