Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / synchronization / graph / ResourceSynchronizer.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/ResourceSynchronizer.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/ResourceSynchronizer.java
new file mode 100644 (file)
index 0000000..17b6138
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/ResourceSynchronizer.java
@@ -0,0 +1,83 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.diagram.synchronization.graph;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.diagram.synchronization.IHintSynchronizer;\r
+import org.simantics.diagram.synchronization.IModificationQueue;\r
+import org.simantics.diagram.synchronization.ISynchronizationContext;\r
+import org.simantics.diagram.synchronization.SynchronizationHints;\r
+import org.simantics.g2d.element.ElementHints;\r
+import org.simantics.utils.datastructures.hints.IHintObservable;\r
+import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
+\r
+/**\r
+ * One should implement\r
+ * {@link #hintChanged(ISynchronizationContext, IModificationQueue, Resource, IHintObservable, Key, Object, Object)}\r
+ * and\r
+ * {@link #getSynchronizedHints()}.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public abstract class ResourceSynchronizer implements IHintSynchronizer {\r
+\r
+    @Override\r
+    public final int synchronize(ISynchronizationContext context, IHintObservable observable) {\r
+        Object o = observable.getHint(ElementHints.KEY_OBJECT);\r
+        if (o instanceof Resource) {\r
+            IModificationQueue queue = context.get(SynchronizationHints.MODIFICATION_QUEUE);\r
+            return synchronize(context, queue, (Resource) o, observable);\r
+        }\r
+        return 0;\r
+    }\r
+\r
+    public abstract Key[] getSynchronizedHints();\r
+\r
+    public int synchronize(ISynchronizationContext context, IModificationQueue queue, Resource object, IHintObservable observable) {\r
+        int count = 0;\r
+        for (Key key : getSynchronizedHints()) {\r
+            count += synchronizeHint(context, queue, object, observable, key);\r
+        }\r
+        return count;\r
+    }\r
+\r
+    protected final int synchronizeHint(ISynchronizationContext context, IModificationQueue queue, Resource object, IHintObservable observable, Key key) {\r
+        return hintChanged(context, queue, object, observable, key, null, observable.getHint(key)) ? 1 : 0;\r
+    }\r
+\r
+    @Override\r
+    public final boolean hintChanged(ISynchronizationContext context, IHintObservable sender, Key key, Object oldValue, Object newValue) {\r
+        Object o = sender.getHint(ElementHints.KEY_OBJECT);\r
+        if (o instanceof Resource) {\r
+            IModificationQueue queue = context.get(SynchronizationHints.MODIFICATION_QUEUE);\r
+            return hintChanged(context, queue, (Resource) o, sender, key, oldValue, newValue);\r
+        }\r
+        return false;\r
+    }\r
+\r
+    @Override\r
+    public final boolean hintRemoved(ISynchronizationContext context, IHintObservable sender, Key key, Object oldValue) {\r
+        Object o = sender.getHint(ElementHints.KEY_OBJECT);\r
+        if (o instanceof Resource) {\r
+            IModificationQueue queue = context.get(SynchronizationHints.MODIFICATION_QUEUE);\r
+            return hintRemoved(context, queue, (Resource) o, sender, key, oldValue);\r
+        }\r
+        return false;\r
+    }\r
+\r
+    public abstract boolean hintChanged(ISynchronizationContext context, IModificationQueue queue, Resource object, IHintObservable sender, Key key, Object oldValue, Object newValue);\r
+\r
+    public boolean hintRemoved(ISynchronizationContext context, IModificationQueue queue, Resource object, IHintObservable sender, Key key, Object oldValue) {\r
+        return false;\r
+    }\r
+\r
+}\r