Java tutorial
/* * ==================================================================== * 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.auth; import java.util.ArrayList; import java.util.List; import java.util.Locale; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import org.apache.http.HttpRequest; import org.apache.http.annotation.ThreadSafe; import org.apache.http.config.Lookup; import org.apache.http.params.HttpParams; import org.apache.http.protocol.ExecutionContext; import org.apache.http.protocol.HttpContext; import org.apache.http.util.Args; /** * Authentication scheme registry that can be used to obtain the corresponding * authentication scheme implementation for a given type of authorization challenge. * * @since 4.0 * * @deprecated (4.3) use {@link org.apache.http.config.Registry} */ @ThreadSafe @Deprecated public final class AuthSchemeRegistry implements Lookup<AuthSchemeProvider> { private final ConcurrentHashMap<String, AuthSchemeFactory> registeredSchemes; public AuthSchemeRegistry() { super(); this.registeredSchemes = new ConcurrentHashMap<String, AuthSchemeFactory>(); } /** * Registers a {@link AuthSchemeFactory} with the given identifier. If a factory with the * given name already exists it will be overridden. This name is the same one used to * retrieve the {@link AuthScheme authentication scheme} from {@link #getAuthScheme}. * * <p> * Please note that custom authentication preferences, if used, need to be updated accordingly * for the new {@link AuthScheme authentication scheme} to take effect. * </p> * * @param name the identifier for this scheme * @param factory the {@link AuthSchemeFactory} class to register * * @see #getAuthScheme */ public void register(final String name, final AuthSchemeFactory factory) { Args.notNull(name, "Name"); Args.notNull(factory, "Authentication scheme factory"); registeredSchemes.put(name.toLowerCase(Locale.ENGLISH), factory); } /** * Unregisters the class implementing an {@link AuthScheme authentication scheme} with * the given name. * * @param name the identifier of the class to unregister */ public void unregister(final String name) { Args.notNull(name, "Name"); registeredSchemes.remove(name.toLowerCase(Locale.ENGLISH)); } /** * Gets the {@link AuthScheme authentication scheme} with the given name. * * @param name the {@link AuthScheme authentication scheme} identifier * @param params the {@link HttpParams HTTP parameters} for the authentication * scheme. * * @return {@link AuthScheme authentication scheme} * * @throws IllegalStateException if a scheme with the given name cannot be found */ public AuthScheme getAuthScheme(final String name, final HttpParams params) throws IllegalStateException { Args.notNull(name, "Name"); final AuthSchemeFactory factory = registeredSchemes.get(name.toLowerCase(Locale.ENGLISH)); if (factory != null) { return factory.newInstance(params); } else { throw new IllegalStateException("Unsupported authentication scheme: " + name); } } /** * Obtains a list containing the names of all registered {@link AuthScheme authentication * schemes} * * @return list of registered scheme names */ public List<String> getSchemeNames() { return new ArrayList<String>(registeredSchemes.keySet()); } /** * Populates the internal collection of registered {@link AuthScheme authentication schemes} * with the content of the map passed as a parameter. * * @param map authentication schemes */ public void setItems(final Map<String, AuthSchemeFactory> map) { if (map == null) { return; } registeredSchemes.clear(); registeredSchemes.putAll(map); } public AuthSchemeProvider lookup(final String name) { return new AuthSchemeProvider() { public AuthScheme create(final HttpContext context) { final HttpRequest request = (HttpRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST); return getAuthScheme(name, request.getParams()); } }; } }