svn commit: r1498721 - /jena/trunk/jena-arq/src/main/java/org/apache/jena/atlas/web/auth/DelegatingAuthenticator.java

[rv...@apache.org]

Author: rvesse
Date: Mon Jul  1 22:11:01 2013
New Revision: 1498721

URL: http://svn.apache.org/r1498721
Log:
Add a delegating authenticator which can be used to map different authenticators to different URIs (JENA-480)

Added:
    jena/trunk/jena-arq/src/main/java/org/apache/jena/atlas/web/auth/DelegatingAuthenticator.java

Added: jena/trunk/jena-arq/src/main/java/org/apache/jena/atlas/web/auth/DelegatingAuthenticator.java
URL: http://svn.apache.org/viewvc/jena/trunk/jena-arq/src/main/java/org/apache/jena/atlas/web/auth/DelegatingAuthenticator.java?rev=1498721&view=auto
==============================================================================
--- jena/trunk/jena-arq/src/main/java/org/apache/jena/atlas/web/auth/DelegatingAuthenticator.java (added)
+++ jena/trunk/jena-arq/src/main/java/org/apache/jena/atlas/web/auth/DelegatingAuthenticator.java Mon Jul  1 22:11:01 2013
@@ -0,0 +1,88 @@
+/*
+ * 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.
+ */
+
+package org.apache.jena.atlas.web.auth;
+
+import java.net.URI;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.http.impl.client.AbstractHttpClient;
+import org.apache.http.protocol.HttpContext;
+
+/**
+ * A scoped authenticator which is actually a wrapper around other
+ * authenticators and thus can be used to mix and match different authentication
+ * mechanisms to different services as desired
+ * 
+ */
+public class DelegatingAuthenticator extends AbstractScopedAuthenticator<HttpAuthenticator> {
+
+    private Map<URI, HttpAuthenticator> authenticators = new HashMap<URI, HttpAuthenticator>();
+
+    /**
+     * Creates a new delegating authenticator
+     * 
+     * @param target
+     *            Target URI
+     * @param authenticator
+     *            Authenticator to delegate to
+     */
+    public DelegatingAuthenticator(URI target, HttpAuthenticator authenticator) {
+        if (target == null)
+            throw new IllegalArgumentException("Target URI cannot be null");
+        this.authenticators.put(target, authenticator);
+    }
+
+    /**
+     * Creates a new delegating authenticator
+     * 
+     * @param authenticators
+     *            Mapping between URIs and authenticators
+     */
+    public DelegatingAuthenticator(Map<URI, HttpAuthenticator> authenticators) {
+        this.authenticators.putAll(authenticators);
+    }
+
+    public void apply(AbstractHttpClient client, HttpContext context, URI target) {
+        HttpAuthenticator authenticator = this.findCredentials(target);
+        if (authenticator != null) {
+            authenticator.apply(client, context, target);
+        }
+    }
+
+    @Override
+    protected HttpAuthenticator getCredentials(URI target) {
+        return this.authenticators.get(target);
+    }
+
+    @Override
+    protected String getUserNameFromCredentials(HttpAuthenticator credentials) {
+        // Not used by this implementation because we override apply() so this
+        // will never be needed and regardless isn't available
+        return null;
+    }
+
+    @Override
+    protected char[] getPasswordFromCredentials(HttpAuthenticator credentials) {
+        // Not used by this implementation because we override apply() so this
+        // will never be needed and regardless isn't available
+        return null;
+    }
+
+}