--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding/src/org/eclipse/core/databinding/ObservablesManager.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,118 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *     Bob Smith - bug 198880
+ *******************************************************************************/
+
+module org.eclipse.core.databinding.ObservablesManager;
+
+import java.lang.all;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+import org.eclipse.core.databinding.observable.IObservable;
+import org.eclipse.core.internal.databinding.Pair;
+
+/**
+ * An observables manager can be used for lifecycle management of
+ * {@link IObservable} objects.
+ *
+ * @noextend This class is not intended to be subclassed by clients.
+ *
+ * @since 1.0
+ *
+ */
+public class ObservablesManager {
+
+    private Set managedObservables = new HashSet();
+    private Set excludedObservables = new HashSet();
+    private Map contexts = new HashMap();
+
+    /**
+     * Create a new observables manager.
+     */
+    public this() {
+    }
+
+    /**
+     * Adds the given observable to this manager.
+     *
+     * @param observable
+     *            the observable
+     */
+    public void addObservable(IObservable observable) {
+        managedObservables.add(observable);
+    }
+
+    /**
+     * Adds the given observable to this manager's exclusion list. The given
+     * observable will not be disposed of by this manager.
+     *
+     * @param observable
+     *            the observable
+     */
+    public void excludeObservable(IObservable observable) {
+        excludedObservables.add(observable);
+    }
+
+    /**
+     * Adds the given data binding context's target and/or model observables to
+     * this manager.
+     *
+     * @param context
+     *            the data binding context
+     * @param trackTargets
+     *            <code>true</code> if the target observables of the context
+     *            should be managed
+     * @param trackModels
+     *            <code>true</code> if the model observables of the context
+     *            should be managed
+     */
+    public void addObservablesFromContext(DataBindingContext context,
+            bool trackTargets, bool trackModels) {
+        if (trackTargets || trackModels) {
+            contexts.put(context, new Pair(new Boolean(trackTargets),
+                    new Boolean(trackModels)));
+        }
+    }
+
+    /**
+     * Disposes of this manager and all observables that it manages.
+     */
+    public void dispose() {
+        Set observables = new HashSet();
+        observables.addAll(managedObservables);
+        for (Iterator it = contexts.keySet().iterator(); it.hasNext();) {
+            DataBindingContext context = cast(DataBindingContext) it.next();
+            Pair trackModelsOrTargets = cast(Pair) contexts.get(context);
+            bool disposeTargets = (cast(Boolean) trackModelsOrTargets.a)
+                    .booleanValue();
+            bool disposeModels = (cast(Boolean) trackModelsOrTargets.b)
+                    .booleanValue();
+            for (Iterator it2 = context.getBindings().iterator(); it2.hasNext();) {
+                Binding binding = cast(Binding) it2.next();
+                if (disposeTargets) {
+                    observables.add(binding.getTarget());
+                }
+                if (disposeModels) {
+                    observables.add(binding.getModel());
+                }
+            }
+        }
+        observables.removeAll(excludedObservables);
+        for (Iterator it = observables.iterator(); it.hasNext();) {
+            IObservable observable = cast(IObservable) it.next();
+            observable.dispose();
+        }
+    }
+}