1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.ui.dnd;
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14 import java.io.IOException;
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16 import org.eclipse.swt.dnd.ByteArrayTransfer;
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17 import org.eclipse.swt.dnd.DND;
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18 import org.eclipse.swt.dnd.TransferData;
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19 import org.simantics.databoard.Bindings;
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20 import org.simantics.databoard.serialization.Serializer;
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21 import org.simantics.graph.representation.TransferableGraph1;
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22 import org.simantics.utils.ui.ErrorLogger;
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25 * @author Tuukka Lehtonen
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27 public class SubgraphTransfer extends ByteArrayTransfer {
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29 private static final String TYPENAME = "graph";
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30 private static final int TYPEID = registerType(TYPENAME);
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31 private static final int[] TYPEIDS = new int[] { TYPEID };
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32 private static final String[] TYPENAMES = new String[] { TYPENAME };
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34 public static final SubgraphTransfer INSTANCE = createInstance();
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36 SubgraphTransfer() {}
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38 public static SubgraphTransfer getInstance() {
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42 public static SubgraphTransfer createInstance() {
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43 SubgraphTransfer result = new SubgraphTransfer();
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47 public void javaToNative(Object object, TransferData transferData) {
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48 if (!(object instanceof TransferableGraph1) || !isSupportedType(transferData))
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49 DND.error(DND.ERROR_INVALID_DATA);
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51 Serializer s = Bindings.getSerializerUnchecked(TransferableGraph1.class);
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53 byte[] data = s.serialize(object);
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54 super.javaToNative(data, transferData);
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55 } catch (IOException e) {
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56 ErrorLogger.defaultLogError(e);
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60 public Object nativeToJava(TransferData transferData) {
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61 if (!isSupportedType(transferData)) return null;
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63 byte[] data = (byte[]) super.nativeToJava(transferData);
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65 Serializer s = Bindings.getSerializerUnchecked(TransferableGraph1.class);
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66 return s.deserialize(data);
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67 } catch (IOException e) {
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72 protected String[] getTypeNames() {
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76 protected int[] getTypeIds() {
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80 protected boolean validate(Object object) {
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81 return object instanceof TransferableGraph1;
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