/*

 * JBoss, Home of Professional Open Source

 * Copyright 2011, Red Hat, 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.

 */



package org.mobicents.protocols.ss7.inap.primitives;



import java.io.IOException;



import org.mobicents.protocols.asn.AsnException;

import org.mobicents.protocols.asn.AsnInputStream;

import org.mobicents.protocols.asn.AsnOutputStream;

import org.mobicents.protocols.asn.Tag;

import org.mobicents.protocols.ss7.inap.api.INAPException;

import org.mobicents.protocols.ss7.inap.api.INAPParsingComponentException;

import org.mobicents.protocols.ss7.inap.api.INAPParsingComponentExceptionReason;

import org.mobicents.protocols.ss7.inap.api.primitives.LegID;

import org.mobicents.protocols.ss7.inap.api.primitives.LegType;



/**

* 

* @author sergey vetyutnev

* 

*/

public class LegIDImpl implements LegID, INAPAsnPrimitive {



	public static final int _ID_sendingSideID = 0;

	public static final int _ID_receivingSideID = 1;



	public static final String _PrimitiveName = "LegID";



	private LegType sendingSideID;

	private LegType receivingSideID;	

	

	

	public LegIDImpl() {

	}

	

	public LegIDImpl(boolean isSendingSideID, LegType legID) {

		if (isSendingSideID)

			this.sendingSideID = legID;

		else

			this.receivingSideID = legID;

	}

	

	

	@Override

	public LegType getSendingSideID() {

		return sendingSideID;

	}



	@Override

	public LegType getReceivingSideID() {

		return receivingSideID;

	}



	

	@Override

	public int getTag() throws INAPException {

		if (this.sendingSideID != null) {

			return _ID_sendingSideID;

		} else {

			return _ID_receivingSideID;

		}

	}



	@Override

	public int getTagClass() {

		return Tag.CLASS_CONTEXT_SPECIFIC;

	}



	@Override

	public boolean getIsPrimitive() {

		return true;

	}



	@Override

	public void decodeAll(AsnInputStream ansIS) throws INAPParsingComponentException {

		try {

			int length = ansIS.readLength();

			this._decode(ansIS, length);

		} catch (IOException e) {

			throw new INAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,

					INAPParsingComponentExceptionReason.MistypedParameter);

		} catch (AsnException e) {

			throw new INAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,

					INAPParsingComponentExceptionReason.MistypedParameter);

		}

	}



	@Override

	public void decodeData(AsnInputStream ansIS, int length) throws INAPParsingComponentException {

		try {

			this._decode(ansIS, length);

		} catch (IOException e) {

			throw new INAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,

					INAPParsingComponentExceptionReason.MistypedParameter);

		} catch (AsnException e) {

			throw new INAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,

					INAPParsingComponentExceptionReason.MistypedParameter);

		}		

	}



	private void _decode(AsnInputStream asnIS, int length) throws INAPParsingComponentException, IOException, AsnException {

		

		if (asnIS.getTagClass() != Tag.CLASS_CONTEXT_SPECIFIC || !asnIS.isTagPrimitive())

			throw new INAPParsingComponentException("Error while decoding " + _PrimitiveName + ": bad tag class or is not primitive: TagClass=" + asnIS.getTagClass(),

					INAPParsingComponentExceptionReason.MistypedParameter);



		byte[] buf;

		switch (asnIS.getTag()) {

		case _ID_sendingSideID:

			buf = asnIS.readOctetStringData(length);

			if (buf.length != 1)

				throw new INAPParsingComponentException("Error while decoding " + _PrimitiveName + ": sendingSideID length must be 1 but it equals "

						+ buf.length, INAPParsingComponentExceptionReason.MistypedParameter);

			this.sendingSideID = LegType.getInstance(buf[0]);

			if (this.sendingSideID == null)

				throw new INAPParsingComponentException("Error while decoding " + _PrimitiveName + ": sendingSideID value must be 1 or 2 it equals "

						+ buf[0], INAPParsingComponentExceptionReason.MistypedParameter);

			break;

		case _ID_receivingSideID:

			buf = asnIS.readOctetStringData(length);

			if (buf.length != 1)

				throw new INAPParsingComponentException("Error while decoding " + _PrimitiveName + ": sendingSideID length must be 1 but it equals "

						+ buf.length, INAPParsingComponentExceptionReason.MistypedParameter);

			this.receivingSideID = LegType.getInstance(buf[0]);

			if (this.receivingSideID == null)

				throw new INAPParsingComponentException("Error while decoding " + _PrimitiveName + ": sendingSideID value must be 1 or 2 it equals "

						+ buf[0], INAPParsingComponentExceptionReason.MistypedParameter);

			break;

		default:

			throw new INAPParsingComponentException("Error while decoding " + _PrimitiveName + ": bad tag : tag=" + asnIS.getTag(),

					INAPParsingComponentExceptionReason.MistypedParameter);

		}

	}



	@Override

	public void encodeAll(AsnOutputStream asnOs) throws INAPException {

		

		this.encodeAll(asnOs, Tag.CLASS_CONTEXT_SPECIFIC, this.getTag());

	}



	@Override

	public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws INAPException {

		

		try {

			asnOs.writeTag(tagClass, true, tag);

			int pos = asnOs.StartContentDefiniteLength();

			this.encodeData(asnOs);

			asnOs.FinalizeContent(pos);

		} catch (AsnException e) {

			throw new INAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);

		}

	}



	@Override

	public void encodeData(AsnOutputStream asnOs) throws INAPException {



		if (this.sendingSideID == null && this.receivingSideID == null || this.sendingSideID != null && this.receivingSideID != null)

			throw new INAPException("Error while encoding the " + _PrimitiveName + ": one of sendingSideID or receivingSideID (not both) must not be empty");



		byte[] buf = new byte[1];

		if (this.sendingSideID != null)

			buf[0] = (byte) sendingSideID.getCode();

		else

			buf[0] = (byte) receivingSideID.getCode();

		asnOs.writeOctetStringData(buf);

	}



	@Override

	public String toString() {



		StringBuilder sb = new StringBuilder();

		sb.append("LegID [");

		if (this.sendingSideID != null) {

			sb.append("sendingSideID=");

			sb.append(sendingSideID);

		}

		if (this.receivingSideID != null) {

			sb.append("receivingSideID=");

			sb.append(receivingSideID);

		}

		sb.append("]");

		

		return sb.toString();

	}

}