Moving to root below branch label

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2005 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/policy/ClassBehaviourIndex.java

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+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * 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.alfresco.repo.policy;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+import org.alfresco.service.cmr.repository.NodeRef;
+import org.alfresco.service.namespace.QName;
+
+
+/**
+ * Class (Type/Aspect) oriented index of bound behaviours
+ * 
+ * Note: Uses Class hierarchy to derive bindings.
+ * 
+ * @author David Caruana
+ *
+ */
+/*package*/ class ClassBehaviourIndex<B extends ClassBehaviourBinding> implements BehaviourIndex<B>
+{
+    // Lock
+    private ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
+    
+    // Map of class bindings  
+    private BehaviourMap<B> classMap = new BehaviourMap<B>();
+    
+    // Map of service bindings
+    private BehaviourMap<ServiceBehaviourBinding> serviceMap = new BehaviourMap<ServiceBehaviourBinding>();
+    
+    // List of registered observers
+    private List<BehaviourChangeObserver<B>> observers = new ArrayList<BehaviourChangeObserver<B>>();
+
+    // Behaviour Filter
+    private BehaviourFilter filter = null;
+
+    
+    /**
+     * Construct.
+     */
+    /*package*/ ClassBehaviourIndex(BehaviourFilter filter)
+    {
+        // Observe class binding changes and propagate to our own observers 
+        this.classMap.addChangeObserver(new BehaviourChangeObserver<B>()
+        {
+            public void addition(B binding, Behaviour behaviour)
+            {
+                for (BehaviourChangeObserver<B> listener : observers)
+                {
+                    listener.addition(binding, behaviour);
+                }
+            }
+        });
+
+        // Observe service binding changes and propagate to our own observers
+        this.serviceMap.addChangeObserver(new BehaviourChangeObserver<ServiceBehaviourBinding>()
+        {
+            public void addition(ServiceBehaviourBinding binding, Behaviour behaviour)
+            {
+                for (BehaviourChangeObserver<B> listener : observers)
+                {
+                    // Note: Don't specify class ref as service-level bindings affect all classes
+                    listener.addition(null, behaviour);
+                }
+            }
+        });
+
+        // Setup state
+        this.filter = filter;
+    }
+
+    
+    /* (non-Javadoc)
+     * @see org.alfresco.repo.policy.BehaviourIndex#getAll()
+     */
+    public Collection<BehaviourDefinition> getAll()
+    {
+        lock.readLock().lock();
+        
+        try
+        {
+            List<BehaviourDefinition> all = new ArrayList<BehaviourDefinition>(classMap.size() + serviceMap.size());
+            all.addAll(classMap.getAll());
+            all.addAll(serviceMap.getAll());
+            return all;
+        }
+        finally
+        {
+            lock.readLock().unlock();
+        }
+    }
+    
+
+    /* (non-Javadoc)
+     * @see org.alfresco.repo.policy.BehaviourIndex#find()
+     */
+    @SuppressWarnings("unchecked")
+    public Collection<BehaviourDefinition> find(B binding)
+    {
+        lock.readLock().lock();
+        
+        try
+        {
+            List<BehaviourDefinition> behaviours = new ArrayList<BehaviourDefinition>();
+
+            // Determine if behaviour has been disabled
+            boolean isEnabled = true;
+            if (filter != null)
+            {
+                NodeRef nodeRef = binding.getNodeRef();
+                QName className = binding.getClassQName();
+                isEnabled = (nodeRef == null) ? filter.isEnabled(className) : filter.isEnabled(nodeRef, className);
+            }
+
+            if (isEnabled)
+            {
+                // Find class behaviour by scanning up the class hierarchy
+                BehaviourDefinition behaviour = null;
+                while(behaviour == null && binding != null)
+                {
+                    behaviour = classMap.get(binding);
+                    if (behaviour == null)
+                    {
+                        binding = (B)binding.generaliseBinding();
+                    }
+                }
+                if (behaviour != null)
+                {
+                    behaviours.add(behaviour);
+                }
+            }
+            
+            // Append all service-level behaviours
+            behaviours.addAll(serviceMap.getAll());
+
+            return behaviours;
+        }
+        finally
+        {
+            lock.readLock().unlock();
+        }
+    }
+
+
+    /* (non-Javadoc)
+     * @see org.alfresco.repo.policy.BehaviourIndex#find()
+     */
+    public void addChangeObserver(BehaviourChangeObserver<B> observer)
+    {
+        observers.add(observer);
+    }
+
+    
+    /* (non-Javadoc)
+     * @see org.alfresco.repo.policy.BehaviourIndex#getFilter()
+     */
+    public BehaviourFilter getFilter()
+    {
+        return filter;
+    }
+
+    
+    /**
+     * Binds a Class Behaviour into this index
+     * 
+     * @param behaviour  the class bound behaviour
+     */
+    public void putClassBehaviour(BehaviourDefinition<B> behaviour)
+    {
+        lock.writeLock().lock();
+        try
+        {
+            classMap.put(behaviour);
+        }
+        finally
+        {
+            lock.writeLock().unlock();
+        }
+    }
+
+    
+    /**
+     * Binds a Service Behaviour into this index
+     * 
+     * @param behaviour  the service bound behaviour
+     */
+    public void putServiceBehaviour(BehaviourDefinition<ServiceBehaviourBinding> behaviour)
+    {
+        lock.writeLock().lock();
+        try
+        {
+            serviceMap.put(behaviour);
+        }
+        finally
+        {
+            lock.writeLock().unlock();
+        }
+    }
+
+}