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/*
 * ====================================================================
 * 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
 * .
 *
 */

package org.apache.http.protocol;

import java.util.Map;

import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.annotation.Contract;
import org.apache.http.util.Args;

/**
 * Maintains a map of HTTP request handlers keyed by a request URI pattern.
 * 

 * Patterns may have three formats:
 * 
 *   {@code *}
 *   {@code *<uri>}
 *   {@code <uri>*}
 * 
 * 

 * This class can be used to resolve an instance of
 * {@link HttpRequestHandler} matching a particular request URI. Usually the
 * resolved request handler will be used to process the request with the
 * specified request URI.
 *
 * @since 4.0
 * @deprecated (4.3) use {@link UriHttpRequestHandlerMapper}
 */
@Contract(threading = ThreadingBehavior.SAFE)
@Deprecated
public class HttpRequestHandlerRegistry implements HttpRequestHandlerResolver {

    private final UriPatternMatcher matcher;

    public HttpRequestHandlerRegistry() {
        matcher = new UriPatternMatcher();
    }

    /**
     * Registers the given {@link HttpRequestHandler} as a handler for URIs
     * matching the given pattern.
     *
     * @param pattern the pattern to register the handler for.
     * @param handler the handler.
     */
    public void register(final String pattern, final HttpRequestHandler handler) {
        Args.notNull(pattern, "URI request pattern");
        Args.notNull(handler, "Request handler");
        matcher.register(pattern, handler);
    }

    /**
     * Removes registered handler, if exists, for the given pattern.
     *
     * @param pattern the pattern to unregister the handler for.
     */
    public void unregister(final String pattern) {
        matcher.unregister(pattern);
    }

    /**
     * Sets handlers from the given map.
     * @param map the map containing handlers keyed by their URI patterns.
     */
    public void setHandlers(final Map map) {
        matcher.setObjects(map);
    }

    /**
     * Get the handler map.
     * @return The map of handlers and their associated URI patterns.
     *
     * @since 4.2
     */
    public Map getHandlers() {
        return matcher.getObjects();
    }

    @Override
    public HttpRequestHandler lookup(final String requestURI) {
        return matcher.lookup(requestURI);
    }

}