// ========================================================================
// Copyright 2008-2009 NEXCOM Systems
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================
package org.cipango.server.ar;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import javax.servlet.sip.SipURI;
import javax.servlet.sip.ar.SipApplicationRouterInfo;
import javax.servlet.sip.ar.SipApplicationRoutingRegion;
import javax.servlet.sip.ar.SipRouteModifier;
import org.eclipse.jetty.util.TypeUtil;
public class RouterInfoUtil
{
public static final String ROUTER_INFO = "X-Cipango-Router-Info";
private static final String NEXT_APPLICATION_NAME = "appName";
private static final String STATE_INFO = "stateInfo";
private static final String SUBSCRIBER_URI = "subUri";
private static final String ROUTING_REGION = "region";
private static final String ROUTES = "routes";
private static final String ROUTE_MODIFIER = "route-modifier";
public static void encode(SipURI uri, SipApplicationRouterInfo routerInfo) throws IOException
{
uri.setUser(ROUTER_INFO);
uri.setParameter(NEXT_APPLICATION_NAME, routerInfo.getNextApplicationName());
setParameter(uri, ROUTING_REGION, routerInfo.getRoutingRegion());
setParameter(uri, SUBSCRIBER_URI, routerInfo.getSubscriberURI());
setParameter(uri, ROUTES, routerInfo.getRoutes());
if (routerInfo.getRouteModifier() != null)
uri.setParameter(ROUTE_MODIFIER, routerInfo.getRouteModifier().toString());
setParameter(uri, STATE_INFO, routerInfo.getStateInfo());
}
private static void setParameter(SipURI uri, String name, String value)
{
if (value != null)
uri.setParameter(name, value);
}
private static void setParameter(SipURI uri, String name, Serializable value) throws IOException
{
if (value != null)
{
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(bout);
out.writeObject(value);
uri.setParameter(name, TypeUtil.toHexString(bout.toByteArray()));
}
}
private static Serializable getSerializable(SipURI uri, String name) throws IOException, ClassNotFoundException
{
String s = uri.getParameter(name);
if (s != null)
{
byte[] b = TypeUtil.fromHexString(s);
ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(b));
return (Serializable) in.readObject();
}
return null;
}
public static SipApplicationRouterInfo decode(SipURI uri) throws Exception
{
String appName = uri.getParameter(NEXT_APPLICATION_NAME);
String sRouteModifier = uri.getParameter(ROUTE_MODIFIER);
SipRouteModifier routeModifier = null;
if (sRouteModifier != null)
routeModifier = SipRouteModifier.valueOf(sRouteModifier);
return new SipApplicationRouterInfo(
appName,
(SipApplicationRoutingRegion) getSerializable(uri, ROUTING_REGION),
uri.getParameter(SUBSCRIBER_URI),
(String[]) getSerializable(uri, ROUTES),
routeModifier,
getSerializable(uri, STATE_INFO));
}
}