ForwardingOptionsImpl.java example

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jss7-master
/*
 * 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.service.supplementary;

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;
import org.mobicents.protocols.ss7.map.api.service.supplementary.ForwardingOptions;
import org.mobicents.protocols.ss7.map.api.service.supplementary.ForwardingReason;
import org.mobicents.protocols.ss7.map.primitives.MAPAsnPrimitive;

/*
 *
 * @author cristian veliscu
 *
 */
public class ForwardingOptionsImpl implements ForwardingOptions, MAPAsnPrimitive {
    private ForwardingReason forwardingReason;
    private int code = 0;

    private static final int MASK_notificationForwarding = 0x80;
    private static final int MASK_redirectingPresentation = 0x40;
    private static final int MASK_notificationCalling = 0x20;
    private static final int MASK_forwardingReason = 0x0C;
    private static final int MASK_forwardingOptions = 0xEC;

    private static final String _PrimitiveName = "ForwardingOptions";

    public ForwardingOptionsImpl() {
    }

    public ForwardingOptionsImpl(boolean notificationToForwardingParty, boolean redirectingPresentation,
            boolean notificationToCallingParty, ForwardingReason forwardingReason) {
        this.forwardingReason = forwardingReason;

        int forwardingReasonCode = 3;
        if (forwardingReason != null) {
            forwardingReasonCode = forwardingReason.getCode();
        }

        code = code & MASK_forwardingOptions; // bit 5 and bits 21 are 0 (unused)
        code = notificationToForwardingParty ? (code | MASK_notificationForwarding) : (code & ~MASK_notificationForwarding);
        code = redirectingPresentation ? (code | MASK_redirectingPresentation) : (code & ~MASK_redirectingPresentation);
        code = notificationToCallingParty ? (code | MASK_notificationCalling) : (code & ~MASK_notificationCalling);
        code = code | (forwardingReasonCode << 2) & MASK_forwardingReason;
    }

    @Override
    public boolean isNotificationToCallingParty() {
        return ((code & MASK_notificationCalling) >> 5 == 1);
    }

    @Override
    public boolean isNotificationToForwardingParty() {
        return ((code & MASK_notificationForwarding) >> 7 == 1);
    }

    @Override
    public boolean isRedirectingPresentation() {
        return ((code & MASK_redirectingPresentation) >> 6 == 1);
    }

    @Override
    public ForwardingReason getForwardingReason() {
        return this.forwardingReason;
    }

    @Override
    public int getData() {
        return code;
    }

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

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

    @Override
    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);
        } catch (AsnException e) {
            throw new MAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
                    MAPParsingComponentExceptionReason.MistypedParameter);
        }
    }

    @Override
    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);
        } catch (AsnException e) {
            throw new MAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
                    MAPParsingComponentExceptionReason.MistypedParameter);
        }
    }

    private void _decode(AsnInputStream ais, int length) throws MAPParsingComponentException, IOException, AsnException {
        if (length != 1)
            throw new MAPParsingComponentException("Error decoding ForwardingOptions: the " + _PrimitiveName
                    + " field must contain 1 octets. Contains: " + length, MAPParsingComponentExceptionReason.MistypedParameter);

        this.code = ais.readOctetStringData(length)[0];
        this.forwardingReason = ForwardingReason.getForwardingReason((code & MASK_forwardingReason) >> 2);
    }

    @Override
    public void encodeAll(AsnOutputStream asnOs) throws MAPException {
        this.encodeAll(asnOs, this.getTagClass(), this.getTag());
    }

    @Override
    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);
        }
    }

    @Override
    public void encodeData(AsnOutputStream asnOs) throws MAPException {
        asnOs.writeOctetStringData(new byte[] { (byte) code });
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append(_PrimitiveName);
        sb.append(" [");

        sb.append("NotificationToCallingParty: ");
        sb.append(isNotificationToCallingParty());
        sb.append(',');
        sb.append("NotificationToForwardingParty: ");
        sb.append(isNotificationToForwardingParty());
        sb.append(',');
        sb.append("RedirectingPresentation: ");
        sb.append(isRedirectingPresentation());
        sb.append(',');
        sb.append("forwardingReason: ");
        sb.append(forwardingReason);

        sb.append("]");
        return sb.toString();
    }
}