Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.ui / src / org / simantics / ui / dnd / SubgraphTransfer.java

diff --git a/bundles/org.simantics.ui/src/org/simantics/ui/dnd/SubgraphTransfer.java b/bundles/org.simantics.ui/src/org/simantics/ui/dnd/SubgraphTransfer.java
new file mode 100644 (file)
index 0000000..ff7cbbc
--- /dev/null
+++ b/bundles/org.simantics.ui/src/org/simantics/ui/dnd/SubgraphTransfer.java
@@ -0,0 +1,84 @@
+/*******************************************************************************\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.ui.dnd;\r
+\r
+import java.io.IOException;\r
+\r
+import org.eclipse.swt.dnd.ByteArrayTransfer;\r
+import org.eclipse.swt.dnd.DND;\r
+import org.eclipse.swt.dnd.TransferData;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.serialization.Serializer;\r
+import org.simantics.graph.representation.TransferableGraph1;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class SubgraphTransfer extends ByteArrayTransfer {\r
+\r
+    private static final String          TYPENAME  = "graph";\r
+    private static final int             TYPEID    = registerType(TYPENAME);\r
+    private static final int[]           TYPEIDS   = new int[] { TYPEID };\r
+    private static final String[]        TYPENAMES = new String[] { TYPENAME };\r
+\r
+    public static final SubgraphTransfer INSTANCE = createInstance();\r
+\r
+    SubgraphTransfer() {}\r
+\r
+    public static SubgraphTransfer getInstance() {\r
+        return INSTANCE;\r
+    }\r
+\r
+    public static SubgraphTransfer createInstance() {\r
+        SubgraphTransfer result = new SubgraphTransfer();\r
+        return result;\r
+    }\r
+\r
+    public void javaToNative(Object object, TransferData transferData) {\r
+        if (!(object instanceof TransferableGraph1) || !isSupportedType(transferData)) \r
+            DND.error(DND.ERROR_INVALID_DATA);\r
+\r
+        Serializer s = Bindings.getSerializerUnchecked(TransferableGraph1.class);\r
+        try {\r
+            byte[] data = s.serialize(object);\r
+            super.javaToNative(data, transferData);\r
+        } catch (IOException e) {\r
+            ErrorLogger.defaultLogError(e);\r
+        }\r
+    }\r
+\r
+    public Object nativeToJava(TransferData transferData) {\r
+        if (!isSupportedType(transferData)) return null;\r
+\r
+        byte[] data = (byte[]) super.nativeToJava(transferData);\r
+        try {\r
+            Serializer s = Bindings.getSerializerUnchecked(TransferableGraph1.class);\r
+            return s.deserialize(data);\r
+        } catch (IOException e) {\r
+            return null;\r
+        }\r
+    }\r
+\r
+    protected String[] getTypeNames() {\r
+        return TYPENAMES;\r
+    }\r
+\r
+    protected int[] getTypeIds() {\r
+        return TYPEIDS;\r
+    }\r
+\r
+    protected boolean validate(Object object) {\r
+        return object instanceof TransferableGraph1;\r
+    }\r
+\r
+}\r