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/*
 * TeleStax, Open Source Cloud Communications  Copyright 2012.
 * 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.map.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.map.api.MAPException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentExceptionReason;

/**
 *
 * Super class for implementing primitives that are OCTET STRING (SIZE (1))
 *
 * @author sergey vetyutnev
 *
 */
public abstract class OctetStringLength1Base implements MAPAsnPrimitive {

    protected int data;

    protected String _PrimitiveName;

    public OctetStringLength1Base(String _PrimitiveName) {
        this._PrimitiveName = _PrimitiveName;
    }

    public OctetStringLength1Base(String _PrimitiveName, int data) {
        this(_PrimitiveName);

        this.data = data;
    }

    public int getTag() throws MAPException {
        return Tag.STRING_OCTET;
    }

    public int getTagClass() {
        return Tag.CLASS_UNIVERSAL;
    }

    public boolean getIsPrimitive() {
        return true;
    }

    @Override
    public void decodeAll(AsnInputStream ansIS) throws MAPParsingComponentException {

        try {
            int length = ansIS.readLength();
            this._decode(ansIS, length);
        } catch (IOException e) {
            throw new MAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
                    MAPParsingComponentExceptionReason.MistypedParameter);
        }
    }

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

        try {
            this._decode(ansIS, length);
        } catch (IOException e) {
            throw new MAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
                    MAPParsingComponentExceptionReason.MistypedParameter);
        }
    }

    protected void _decode(AsnInputStream ansIS, int length) throws MAPParsingComponentException, IOException {

        if (length != 1)
            throw new MAPParsingComponentException("Error decoding " + _PrimitiveName
                    + ": the field must contain 1 octet. Contains: " + length,
                    MAPParsingComponentExceptionReason.MistypedParameter);

        this.data = ansIS.read() & 0xFF;
    }

    public void encodeAll(AsnOutputStream asnOs) throws MAPException {

        this.encodeAll(asnOs, this.getTagClass(), this.getTag());
    }

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

        try {
            asnOs.writeTag(tagClass, this.getIsPrimitive(), tag);
            int pos = asnOs.StartContentDefiniteLength();
            this.encodeData(asnOs);
            asnOs.FinalizeContent(pos);
        } catch (AsnException e) {
            throw new MAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
        }
    }

    public void encodeData(AsnOutputStream asnOs) throws MAPException {

        asnOs.write(this.data);
    }

    @Override
    public int hashCode() {
        return data;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        OctetStringLength1Base other = (OctetStringLength1Base) obj;

        return data == other.data;
    }

    @Override
    public String toString() {
        return _PrimitiveName + " [Data=" + this.data + "]";
    }
}