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/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/conn/params/ConnRouteParams.java $
* $Revision: 658785 $
* $Date: 2008-05-21 10:47:40 -0700 (Wed, 21 May 2008) $
*
* ====================================================================
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.conn.params;
import java.net.InetAddress;
import org.apache.http.HttpHost;
import org.apache.http.params.HttpParams;
import org.apache.http.conn.routing.HttpRoute;
/**
* An adaptor for accessing route related parameters in {@link HttpParams}.
* See {@link ConnRoutePNames} for parameter name definitions.
*
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
* @author <a href="mailto:rolandw at apache.org">Roland Weber</a>
*
* @version $Revision: 658785 $
*
* @since 4.0
*/
public class ConnRouteParams implements ConnRoutePNames {
/**
* A special value indicating "no host".
* This relies on a nonsense scheme name to avoid conflicts
* with actual hosts. Note that this is a <i>valid</i> host.
*/
public static final HttpHost NO_HOST =
new HttpHost("127.0.0.255", 0, "no-host");
/**
* A special value indicating "no route".
* This is a route with {@link #NO_HOST} as the target.
*/
public static final HttpRoute NO_ROUTE = new HttpRoute(NO_HOST);
/** Disabled default constructor. */
private ConnRouteParams() {
// no body
}
/**
* Obtains the {@link ConnRoutePNames#DEFAULT_PROXY DEFAULT_PROXY}
* parameter value.
* {@link #NO_HOST} will be mapped to <code>null</code>,
* to allow unsetting in a hierarchy.
*
* @param params the parameters in which to look up
*
* @return the default proxy set in the argument parameters, or
* <code>null</code> if not set
*/
public static HttpHost getDefaultProxy(HttpParams params) {
if (params == null) {
throw new IllegalArgumentException("Parameters must not be null.");
}
HttpHost proxy = (HttpHost)
params.getParameter(DEFAULT_PROXY);
if ((proxy != null) && NO_HOST.equals(proxy)) {
// value is explicitly unset
proxy = null;
}
return proxy;
}
/**
* Sets the {@link ConnRoutePNames#DEFAULT_PROXY DEFAULT_PROXY}
* parameter value.
*
* @param params the parameters in which to set the value
* @param proxy the value to set, may be <code>null</code>.
* Note that {@link #NO_HOST} will be mapped to
* <code>null</code> by {@link #getDefaultProxy},
* to allow for explicit unsetting in hierarchies.
*/
public static void setDefaultProxy(HttpParams params,
HttpHost proxy) {
if (params == null) {
throw new IllegalArgumentException("Parameters must not be null.");
}
params.setParameter(DEFAULT_PROXY, proxy);
}
/**
* Obtains the {@link ConnRoutePNames#FORCED_ROUTE FORCED_ROUTE}
* parameter value.
* {@link #NO_ROUTE} will be mapped to <code>null</code>,
* to allow unsetting in a hierarchy.
*
* @param params the parameters in which to look up
*
* @return the forced route set in the argument parameters, or
* <code>null</code> if not set
*/
public static HttpRoute getForcedRoute(HttpParams params) {
if (params == null) {
throw new IllegalArgumentException("Parameters must not be null.");
}
HttpRoute route = (HttpRoute)
params.getParameter(FORCED_ROUTE);
if ((route != null) && NO_ROUTE.equals(route)) {
// value is explicitly unset
route = null;
}
return route;
}
/**
* Sets the {@link ConnRoutePNames#FORCED_ROUTE FORCED_ROUTE}
* parameter value.
*
* @param params the parameters in which to set the value
* @param route the value to set, may be <code>null</code>.
* Note that {@link #NO_ROUTE} will be mapped to
* <code>null</code> by {@link #getForcedRoute},
* to allow for explicit unsetting in hierarchies.
*/
public static void setForcedRoute(HttpParams params,
HttpRoute route) {
if (params == null) {
throw new IllegalArgumentException("Parameters must not be null.");
}
params.setParameter(FORCED_ROUTE, route);
}
/**
* Obtains the {@link ConnRoutePNames#LOCAL_ADDRESS LOCAL_ADDRESS}
* parameter value.
* There is no special value that would automatically be mapped to
* <code>null</code>. You can use the wildcard address (0.0.0.0 for IPv4,
* :: for IPv6) to override a specific local address in a hierarchy.
*
* @param params the parameters in which to look up
*
* @return the local address set in the argument parameters, or
* <code>null</code> if not set
*/
public static InetAddress getLocalAddress(HttpParams params) {
if (params == null) {
throw new IllegalArgumentException("Parameters must not be null.");
}
InetAddress local = (InetAddress)
params.getParameter(LOCAL_ADDRESS);
// no explicit unsetting
return local;
}
/**
* Sets the {@link ConnRoutePNames#LOCAL_ADDRESS LOCAL_ADDRESS}
* parameter value.
*
* @param params the parameters in which to set the value
* @param local the value to set, may be <code>null</code>
*/
public static void setLocalAddress(HttpParams params,
InetAddress local) {
if (params == null) {
throw new IllegalArgumentException("Parameters must not be null.");
}
params.setParameter(LOCAL_ADDRESS, local);
}
}
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