LMSIImpl.java

/*
 * 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.map.primitives;

import java.io.IOException;
import java.util.Arrays;

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;
import org.mobicents.protocols.ss7.map.api.primitives.LMSI;

/**
 *
 * @author sergey vetyutnev
 *
 */
public class LMSIImpl implements LMSI, MAPAsnPrimitive {

    private byte[] data;

    public LMSIImpl() {
    }

    public LMSIImpl(byte[] data) {
        this.data = data;
    }

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

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

    public boolean getIsPrimitive() {
        return true;
    }

    public byte[] getData() {
        return this.data;
    }

    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 LMSI: " + 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 LMSI: " + e.getMessage(), e,
                    MAPParsingComponentExceptionReason.MistypedParameter);
        }
    }

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

        if (length != 4)
            throw new MAPParsingComponentException("Error decoding LMSI: the LMSI field must contain 4 octets. Contains: "
                    + length, MAPParsingComponentExceptionReason.MistypedParameter);

        try {
            this.data = new byte[4];
            ansIS.read(this.data);
        } catch (IOException e) {
            throw new MAPParsingComponentException("IOException when decoding LMSI: " + e.getMessage(), e,
                    MAPParsingComponentExceptionReason.MistypedParameter);
        }
    }

    public void encodeAll(AsnOutputStream asnOs) throws MAPException {

        this.encodeAll(asnOs, Tag.CLASS_UNIVERSAL, Tag.STRING_OCTET);
    }

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

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

    public void encodeData(AsnOutputStream asnOs) throws MAPException {

        if (this.data == null)
            throw new MAPException("Error while encoding the LMSI: data is not defined");

        if (this.data.length != 4)
            throw new MAPException("Error while encoding the LMSI: data field length must equale 4");

        asnOs.write(this.data);
    }

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

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + Arrays.hashCode(data);
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        LMSIImpl other = (LMSIImpl) obj;
        if (!Arrays.equals(data, other.data))
            return false;
        return true;
    }

    private String printDataArr() {
        StringBuilder sb = new StringBuilder();
        if (this.data != null) {
            for (int b : this.data) {
                sb.append(b);
                sb.append(" ");
            }
        }

        return sb.toString();
    }
}