michael@0: /*
michael@0:  * ====================================================================
michael@0:  *
michael@0:  *  Licensed to the Apache Software Foundation (ASF) under one or more
michael@0:  *  contributor license agreements.  See the NOTICE file distributed with
michael@0:  *  this work for additional information regarding copyright ownership.
michael@0:  *  The ASF licenses this file to You under the Apache License, Version 2.0
michael@0:  *  (the "License"); you may not use this file except in compliance with
michael@0:  *  the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  *  Unless required by applicable law or agreed to in writing, software
michael@0:  *  distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  *  See the License for the specific language governing permissions and
michael@0:  *  limitations under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: package ch.boye.httpclientandroidlib.impl.client;
michael@0: 
michael@0: import java.util.Map;
michael@0: import java.util.concurrent.ConcurrentHashMap;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.annotation.ThreadSafe;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.auth.AuthScope;
michael@0: import ch.boye.httpclientandroidlib.auth.Credentials;
michael@0: import ch.boye.httpclientandroidlib.client.CredentialsProvider;
michael@0: 
michael@0: /**
michael@0:  * Default implementation of {@link CredentialsProvider}.
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: @ThreadSafe
michael@0: public class BasicCredentialsProvider implements CredentialsProvider {
michael@0: 
michael@0:     private final ConcurrentHashMap<AuthScope, Credentials> credMap;
michael@0: 
michael@0:     /**
michael@0:      * Default constructor.
michael@0:      */
michael@0:     public BasicCredentialsProvider() {
michael@0:         super();
michael@0:         this.credMap = new ConcurrentHashMap<AuthScope, Credentials>();
michael@0:     }
michael@0: 
michael@0:     public void setCredentials(
michael@0:             final AuthScope authscope,
michael@0:             final Credentials credentials) {
michael@0:         if (authscope == null) {
michael@0:             throw new IllegalArgumentException("Authentication scope may not be null");
michael@0:         }
michael@0:         credMap.put(authscope, credentials);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Find matching {@link Credentials credentials} for the given authentication scope.
michael@0:      *
michael@0:      * @param map the credentials hash map
michael@0:      * @param authscope the {@link AuthScope authentication scope}
michael@0:      * @return the credentials
michael@0:      *
michael@0:      */
michael@0:     private static Credentials matchCredentials(
michael@0:             final Map<AuthScope, Credentials> map,
michael@0:             final AuthScope authscope) {
michael@0:         // see if we get a direct hit
michael@0:         Credentials creds = map.get(authscope);
michael@0:         if (creds == null) {
michael@0:             // Nope.
michael@0:             // Do a full scan
michael@0:             int bestMatchFactor  = -1;
michael@0:             AuthScope bestMatch  = null;
michael@0:             for (AuthScope current: map.keySet()) {
michael@0:                 int factor = authscope.match(current);
michael@0:                 if (factor > bestMatchFactor) {
michael@0:                     bestMatchFactor = factor;
michael@0:                     bestMatch = current;
michael@0:                 }
michael@0:             }
michael@0:             if (bestMatch != null) {
michael@0:                 creds = map.get(bestMatch);
michael@0:             }
michael@0:         }
michael@0:         return creds;
michael@0:     }
michael@0: 
michael@0:     public Credentials getCredentials(final AuthScope authscope) {
michael@0:         if (authscope == null) {
michael@0:             throw new IllegalArgumentException("Authentication scope may not be null");
michael@0:         }
michael@0:         return matchCredentials(this.credMap, authscope);
michael@0:     }
michael@0: 
michael@0:     public void clear() {
michael@0:         this.credMap.clear();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public String toString() {
michael@0:         return credMap.toString();
michael@0:     }
michael@0: 
michael@0: }