/*
 * 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.m3ua.impl.router;

import javolution.util.FastList;

import org.mobicents.protocols.ss7.m3ua.impl.As;

/**
 * 
 * @author amit bhayani
 * 
 */
public class OPCNode {

    protected int dpc;
    protected int opc;
    protected FastList<SINode> siList = new FastList<SINode>();

    // Reference to wild card SINode. If no matching SINode found for passed si
    // and wildcard defined, use wildcard one.
    private SINode wildCardSINode;

    protected OPCNode(int dpc, int opc) {
        this.dpc = dpc;
        this.opc = opc;
    }

    protected void addSi(int si, As as) throws Exception {
        for (FastList.Node<SINode> n = siList.head(), end = siList.tail(); (n = n.getNext()) != end;) {
            SINode siNode = n.getValue();
            if (siNode.si == si) {
                throw new Exception(String.format("Service indicator %d already exist for OPC %d and DPC %d", si, opc,
                        dpc));
            }
        }

        SINode siNode = new SINode(si, as);
        siList.add(siNode);

        if (si == -1) {
            wildCardSINode = siNode;
        }
    }

    protected As getAs(short si) {
        for (FastList.Node<SINode> n = siList.head(), end = siList.tail(); (n = n.getNext()) != end;) {
            SINode siNode = n.getValue();
            if (siNode.si == si) {
                return siNode.as;
            }
        }

        if (wildCardSINode != null) {
            return wildCardSINode.as;
        }
        return null;
    }
}