/*
 * ====================================================================
 * 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.impl.conn;


import java.net.InetAddress;

import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.conn.params.ConnRouteParams;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.conn.routing.HttpRoutePlanner;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.Args;
import org.apache.http.util.Asserts;

Default implementation of an HttpRoutePlanner. This implementation is based on parameters. It will not make use of any Java system properties, nor of system or browser proxy settings. 

The following parameters can be used to customize the behavior of this
class:

 
ConnRoutePNames.DEFAULT_PROXY
 
ConnRoutePNames.LOCAL_ADDRESS
 
ConnRoutePNames.FORCED_ROUTE

Since:
4.0
Deprecated:
(4.3) use DefaultRoutePlanner/**
 * Default implementation of an {@link HttpRoutePlanner}. This implementation
 * is based on {@link org.apache.http.conn.params.ConnRoutePNames parameters}.
 * It will not make use of any Java system properties, nor of system or
 * browser proxy settings.
 * <p>
 * The following parameters can be used to customize the behavior of this
 * class:
 * <ul>
 *  <li>{@link org.apache.http.conn.params.ConnRoutePNames#DEFAULT_PROXY}</li>
 *  <li>{@link org.apache.http.conn.params.ConnRoutePNames#LOCAL_ADDRESS}</li>
 *  <li>{@link org.apache.http.conn.params.ConnRoutePNames#FORCED_ROUTE}</li>
 * </ul>
 *
 * @since 4.0
 *
 * @deprecated (4.3) use {@link DefaultRoutePlanner}
 */
@Contract(threading = ThreadingBehavior.SAFE)
@Deprecated
public class DefaultHttpRoutePlanner implements HttpRoutePlanner {

    
The scheme registry. /** The scheme registry. */
    protected final SchemeRegistry schemeRegistry; // class is @Contract(threading = ThreadingBehavior.SAFE)

    
Creates a new default route planner.
Params:
schreg –    the scheme registry/**
     * Creates a new default route planner.
     *
     * @param schreg    the scheme registry
     */
    public DefaultHttpRoutePlanner(final SchemeRegistry schreg) {
        Args.notNull(schreg, "Scheme registry");
        schemeRegistry = schreg;
    }

    @Override
    public HttpRoute determineRoute(final HttpHost target,
                                    final HttpRequest request,
                                    final HttpContext context)
        throws HttpException {

        Args.notNull(request, "HTTP request");

        // If we have a forced route, we can do without a target.
        HttpRoute route =
            ConnRouteParams.getForcedRoute(request.getParams());
        if (route != null) {
            return route;
        }

        // If we get here, there is no forced route.
        // So we need a target to compute a route.

        Asserts.notNull(target, "Target host");

        final InetAddress local =
            ConnRouteParams.getLocalAddress(request.getParams());
        final HttpHost proxy =
            ConnRouteParams.getDefaultProxy(request.getParams());

        final Scheme schm;
        try {
            schm = this.schemeRegistry.getScheme(target.getSchemeName());
        } catch (final IllegalStateException ex) {
            throw new HttpException(ex.getMessage());
        }
        // as it is typically used for TLS/SSL, we assume that
        // a layered scheme implies a secure connection
        final boolean secure = schm.isLayered();

        if (proxy == null) {
            route = new HttpRoute(target, local, secure);
        } else {
            route = new HttpRoute(target, local, proxy, secure);
        }
        return route;
    }

}