GUAC-1100: Add getAll() to Directory. Create AbstractDirectory and migrate the Simple* implementations appropriately.

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/Directory.java

@@ -22,6 +22,7 @@
 
 package org.glyptodon.guacamole.net.auth;
 
+import java.util.Collection;
 import java.util.Set;
 import org.glyptodon.guacamole.GuacamoleException;
 
@@ -57,6 +58,29 @@ public interface Directory<IdentifierType, ObjectType> {
      */
     ObjectType get(IdentifierType identifier) throws GuacamoleException;
 
+    /**
+     * Returns the objects having the given identifiers. Note that changes to
+     * any object returned will not necessarily affect the object stored within
+     * the Directory. To update an object stored within a
+     * Directory such that future calls to get() will return the updated
+     * object, you must call update() on the object after modification.
+     *
+     * @param identifiers
+     *     The identifiers to use when locating the objects to return.
+     *
+     * @return
+     *     The objects having the given identifiers. If any identifiers do not
+     *     correspond to accessible objects, those identifiers will be ignored.
+     *     If no objects correspond to any of the given identifiers, the
+     *     returned collection will be empty.
+     *
+     * @throws GuacamoleException
+     *     If an error occurs while retrieving the objects, or if permission
+     *     to retrieve the requested objects is denied.
+     */
+    Collection<ObjectType> getAll(Collection<IdentifierType> identifiers)
+            throws GuacamoleException;
+
     /**
      * Returns a Set containing all identifiers for all objects within this
      * Directory.

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/simple/SimpleConnectionDirectory.java

@@ -25,11 +25,7 @@ package org.glyptodon.guacamole.net.auth.simple;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Map.Entry;
-import java.util.Set;
-import org.glyptodon.guacamole.GuacamoleException;
-import org.glyptodon.guacamole.GuacamoleSecurityException;
 import org.glyptodon.guacamole.net.auth.Connection;
-import org.glyptodon.guacamole.net.auth.Directory;
 import org.glyptodon.guacamole.protocol.GuacamoleConfiguration;
 
 /**
@@ -39,13 +35,12 @@ import org.glyptodon.guacamole.protocol.GuacamoleConfiguration;
  *
  * @author Michael Jumper
  */
-public class SimpleConnectionDirectory
-    implements Directory<String, Connection> {
+public class SimpleConnectionDirectory extends SimpleDirectory<String, Connection> {
 
     /**
      * The Map of Connections to provide access to.
      */
-    private Map<String, Connection> connections =
+    private final Map<String, Connection> connections =
             new HashMap<String, Connection>();
 
     /**
@@ -63,40 +58,9 @@ public class SimpleConnectionDirectory
                     new SimpleConnection(entry.getKey(), entry.getKey(),
                 entry.getValue()));
 
-    }
+        // Use the connection map to back the underlying AbstractDirectory
+        super.setObjects(connections);
 
-    @Override
-    public Connection get(String identifier)
-            throws GuacamoleException {
-        return connections.get(identifier);
-    }
-
-    @Override
-    public Set<String> getIdentifiers() throws GuacamoleException {
-        return connections.keySet();
-    }
-
-    @Override
-    public void add(Connection connection)
-            throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void update(Connection connection)
-            throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void remove(String identifier) throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void move(String identifier, Directory<String, Connection> directory) 
-            throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
     }
 
     /**

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/simple/SimpleConnectionGroupDirectory.java

@@ -25,11 +25,7 @@ package org.glyptodon.guacamole.net.auth.simple;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Set;
-import org.glyptodon.guacamole.GuacamoleException;
-import org.glyptodon.guacamole.GuacamoleSecurityException;
 import org.glyptodon.guacamole.net.auth.ConnectionGroup;
-import org.glyptodon.guacamole.net.auth.Directory;
 
 /**
  * An extremely simple read-only implementation of a Directory of
@@ -39,12 +35,12 @@ import org.glyptodon.guacamole.net.auth.Directory;
  * @author James Muehlner
  */
 public class SimpleConnectionGroupDirectory
-    implements Directory<String, ConnectionGroup> {
+    extends SimpleDirectory<String, ConnectionGroup> {
 
     /**
      * The Map of ConnectionGroups to provide access to.
      */
-    private Map<String, ConnectionGroup> connectionGroups =
+    private final Map<String, ConnectionGroup> connectionGroups =
             new HashMap<String, ConnectionGroup>();
 
     /**
@@ -60,40 +56,9 @@ public class SimpleConnectionGroupDirectory
         for (ConnectionGroup group : groups)
             connectionGroups.put(group.getIdentifier(), group);
 
-    }
+        // Use the connection group map to back the underlying AbstractDirectory
+        super.setObjects(connectionGroups);
 
-    @Override
-    public ConnectionGroup get(String identifier)
-            throws GuacamoleException {
-        return connectionGroups.get(identifier);
-    }
-
-    @Override
-    public Set<String> getIdentifiers() throws GuacamoleException {
-        return connectionGroups.keySet();
-    }
-
-    @Override
-    public void add(ConnectionGroup connectionGroup)
-            throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void update(ConnectionGroup connectionGroup)
-            throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void remove(String identifier) throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void move(String identifier, Directory<String, ConnectionGroup> directory) 
-            throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
     }
 
     /**

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/simple/SimpleDirectory.java

@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2015 Glyptodon LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package org.glyptodon.guacamole.net.auth.simple;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import org.glyptodon.guacamole.GuacamoleException;
+import org.glyptodon.guacamole.GuacamoleSecurityException;
+import org.glyptodon.guacamole.net.auth.Directory;
+
+/**
+ * An extremely simple read-only implementation of a Directory which provides
+ * access to a pre-defined Map of arbitrary objects. Any changes to the Map
+ * will affect the available contents of this SimpleDirectory.
+ *
+ * @author Michael Jumper
+ * @param <IdentifierType>
+ *     The type of identifier used to identify objects stored within this
+ *     SimpleDirectory.
+ *
+ * @param <ObjectType>
+ *     The type of objects stored within this SimpleDirectory.
+ */
+public class SimpleDirectory<IdentifierType, ObjectType>
+    implements Directory<IdentifierType, ObjectType> {
+
+    /**
+     * The Map of objects to provide access to.
+     */
+    private Map<IdentifierType, ObjectType> objects = Collections.EMPTY_MAP;
+
+    /**
+     * Creates a new empty SimpleDirectory which does not provide access to
+     * any objects.
+     */
+    public SimpleDirectory() {
+    }
+
+    /**
+     * Creates a new SimpleDirectory which provides access to the objects
+     * contained within the given Map.
+     *
+     * @param objects
+     *     The Map of objects to provide access to.
+     */
+    public SimpleDirectory(Map<IdentifierType, ObjectType> objects) {
+        this.objects = objects;
+    }
+
+    /**
+     * Sets the Map which backs this SimpleDirectory. Future function calls
+     * which retrieve objects from this SimpleDirectory will use the provided
+     * Map.
+     *
+     * @param objects
+     *     The Map of objects to provide access to.
+     */
+    protected void setObjects(Map<IdentifierType, ObjectType> objects) {
+        this.objects = objects;
+    }
+
+    /**
+     * Returns the Map which currently backs this SimpleDirectory. Changes to
+     * this Map will affect future function calls that retrieve objects from
+     * this SimpleDirectory.
+     *
+     * @return
+     *     The Map of objects which currently backs this SimpleDirectory.
+     */
+    protected Map<IdentifierType, ObjectType> getObjects() {
+        return objects;
+    }
+
+    @Override
+    public ObjectType get(IdentifierType identifier)
+            throws GuacamoleException {
+        return objects.get(identifier);
+    }
+
+    @Override
+    public Collection<ObjectType> getAll(Collection<IdentifierType> identifiers)
+            throws GuacamoleException {
+
+        // Create collection which has an appropriate initial size
+        Collection<ObjectType> foundObjects = new ArrayList<ObjectType>(identifiers.size());
+
+        // Populate collection with matching objects
+        for (IdentifierType identifier : identifiers) {
+
+            // Add the object which has the current identifier, if any
+            ObjectType object = objects.get(identifier);
+            if (object != null)
+                foundObjects.add(object);
+
+        }
+
+        return foundObjects;
+
+    }
+
+    @Override
+    public Set<IdentifierType> getIdentifiers() throws GuacamoleException {
+        return objects.keySet();
+    }
+
+    @Override
+    public void add(ObjectType connection)
+            throws GuacamoleException {
+        throw new GuacamoleSecurityException("Permission denied.");
+    }
+
+    @Override
+    public void update(ObjectType connection)
+            throws GuacamoleException {
+        throw new GuacamoleSecurityException("Permission denied.");
+    }
+
+    @Override
+    public void remove(IdentifierType identifier) throws GuacamoleException {
+        throw new GuacamoleSecurityException("Permission denied.");
+    }
+
+    @Override
+    public void move(IdentifierType identifier,
+            Directory<IdentifierType, ObjectType> directory)
+            throws GuacamoleException {
+        throw new GuacamoleSecurityException("Permission denied.");
+    }
+
+}

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/simple/SimpleUserDirectory.java

@@ -23,10 +23,6 @@
 package org.glyptodon.guacamole.net.auth.simple;
 
 import java.util.Collections;
-import java.util.Set;
-import org.glyptodon.guacamole.GuacamoleException;
-import org.glyptodon.guacamole.GuacamoleSecurityException;
-import org.glyptodon.guacamole.net.auth.Directory;
 import org.glyptodon.guacamole.net.auth.User;
 
 /**
@@ -35,12 +31,7 @@ import org.glyptodon.guacamole.net.auth.User;
  *
  * @author Michael Jumper
  */
-public class SimpleUserDirectory implements Directory<String, User> {
-
-    /**
-     * The only user to be contained within this directory.
-     */
-    private User user;
+public class SimpleUserDirectory extends SimpleDirectory<String, User> {
 
     /**
      * Creates a new SimpleUserDirectory which provides access to the single
@@ -49,45 +40,7 @@ public class SimpleUserDirectory implements Directory<String, User> {
      * @param user The user to provide access to.
      */
     public SimpleUserDirectory(User user) {
-        this.user = user;
-    }
-
-    @Override
-    public User get(String username) throws GuacamoleException {
-
-        // If username matches, return the user
-        if (user.getUsername().equals(username))
-            return user;
-
-        // Otherwise, not found
-        return null;
-
-    }
-
-    @Override
-    public Set<String> getIdentifiers() throws GuacamoleException {
-        return Collections.singleton(user.getUsername());
-    }
-
-    @Override
-    public void add(User user) throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void update(User user) throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void remove(String username) throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
-    }
-
-    @Override
-    public void move(String identifier, Directory<String, User> directory) 
-            throws GuacamoleException {
-        throw new GuacamoleSecurityException("Permission denied.");
+        super(Collections.singletonMap(user.getUsername(), user));
     }
 
 }