Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/GraphSynchronizationContext.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/GraphSynchronizationContext.java
new file mode 100644 (file)
index 0000000..893e831
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/GraphSynchronizationContext.java
@@ -0,0 +1,62 @@
+/*******************************************************************************\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.ReadGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.diagram.internal.DebugPolicy;\r
+import org.simantics.diagram.synchronization.IModifiableSynchronizationContext;\r
+import org.simantics.diagram.synchronization.IModificationQueue;\r
+import org.simantics.diagram.synchronization.SynchronizationHints;\r
+import org.simantics.utils.datastructures.hints.HintContext;\r
+import org.simantics.utils.datastructures.hints.IHintContext;\r
+import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class GraphSynchronizationContext implements IModifiableSynchronizationContext {\r
+\r
+    private final IHintContext ctx = new HintContext();\r
+\r
+    public GraphSynchronizationContext(ReadGraph graph, IModificationQueue modificationQueue) {\r
+        ctx.setHint(GraphSynchronizationHints.SESSION, graph.getSession());\r
+        ctx.setHint(GraphSynchronizationHints.BASIC_RESOURCES, BasicResources.getInstance(graph));\r
+        ctx.setHint(SynchronizationHints.MODIFICATION_QUEUE, modificationQueue);\r
+    }\r
+\r
+    public static GraphSynchronizationContext getWriteInstance(WriteGraph graph, IModificationQueue modificationQueue) {\r
+        GraphSynchronizationContext ctx = new GraphSynchronizationContext(graph, modificationQueue);\r
+        ctx.ctx.setHint(GraphSynchronizationHints.READ_TRANSACTION, graph);\r
+        ctx.ctx.setHint(GraphSynchronizationHints.WRITE_TRANSACTION, graph);\r
+        return ctx;\r
+    }\r
+\r
+    @Override\r
+    public <T> T get(Key key) {\r
+        return ctx.getHint(key);\r
+    }\r
+\r
+    @Override\r
+    public <T> T set(Key key, Object value) {\r
+        if (DebugPolicy.DEBUG_SYNC_CONTEXT)\r
+            System.out.println(this + ".set(" + key + "): " + value);\r
+\r
+        if (value == null)\r
+            return ctx.removeHint(key);\r
+\r
+        T t = ctx.getHint(key);\r
+        ctx.setHint(key, value);\r
+        return t;\r
+    }\r
+\r
+}
\ No newline at end of file