bundles/org.simantics.ui/src/org/simantics/ui/dnd/ResourceTransferUtils.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.ui.dnd;\r
  13 \r
  14 import java.awt.datatransfer.DataFlavor;\r
  15 import java.awt.datatransfer.StringSelection;\r
  16 import java.awt.datatransfer.Transferable;\r
  17 import java.awt.datatransfer.UnsupportedFlavorException;\r
  18 import java.io.IOException;\r
  19 \r
  20 import org.eclipse.swt.dnd.TextTransfer;\r
  21 import org.eclipse.swt.dnd.TransferData;\r
  22 import org.simantics.db.Session;\r
  23 import org.simantics.db.common.ResourceArray;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.db.service.SerialisationSupport;\r
  26 import org.simantics.utils.ui.workbench.StringMemento;\r
  27 \r
  28 /**\r
  29  * @author Toni Kalajainen\r
  30  */\r
  31 public class ResourceTransferUtils {\r
  32 \r
  33     public static String createStringTransferable(Session s, ResourceArray resources[])\r
  34     throws DatabaseException\r
  35     {\r
  36         return createStringTransferable(s, resources, null);\r
  37     }\r
  38 \r
  39     public static String createStringTransferable(Session s, ResourceArray resources[], String purpose)\r
  40     throws DatabaseException\r
  41     {\r
  42         SerialisationSupport support = s.getService(SerialisationSupport.class);\r
  43         StringMemento memento = new StringMemento();\r
  44         ResourceTransferData transferData = new ResourceTransferData(s, resources);\r
  45         transferData.setPurpose(purpose);\r
  46         transferData.writeToMemento(support, memento);\r
  47         String strData = memento.toString();\r
  48         return strData;\r
  49     }\r
  50 \r
  51     public static String createStringTransferable(SerialisationSupport serializer, ResourceTransferData transferData)\r
  52     throws DatabaseException\r
  53     {\r
  54         StringMemento memento = new StringMemento();\r
  55         transferData.writeToMemento(serializer, memento);\r
  56         String strData = memento.toString();\r
  57         return strData;\r
  58     }\r
  59 \r
  60     public static Transferable createAwtTransferable(SerialisationSupport serializer, ResourceTransferData transferData)\r
  61     throws DatabaseException\r
  62     {\r
  63         String strData = createStringTransferable(serializer, transferData);\r
  64         return new StringSelection(strData);\r
  65     }\r
  66 \r
  67     public static TransferData createSwtTextTransferData(SerialisationSupport serializer, ResourceTransferData transferable)\r
  68     throws DatabaseException\r
  69     {\r
  70         String strData = createStringTransferable(serializer, transferable);\r
  71         TransferData transferData = new TransferData();\r
  72         TextTransfer.getInstance().javaToNative(strData, transferData);\r
  73         return transferData;\r
  74     }\r
  75 \r
  76     public static ResourceTransferData readStringTransferable(SerialisationSupport serializer, String strData)\r
  77     throws IllegalArgumentException, DatabaseException\r
  78     {\r
  79         StringMemento sm = new StringMemento(strData);\r
  80         ResourceTransferData result = new ResourceTransferData();\r
  81         result.readFromMemento(serializer, sm);\r
  82         return result;\r
  83     }\r
  84 \r
  85     public static ResourceTransferData readAwtTransferable(SerialisationSupport serializer, Transferable transferable)\r
  86     throws UnsupportedFlavorException, IOException, IllegalArgumentException, DatabaseException\r
  87     {\r
  88         if (!transferable.isDataFlavorSupported(DataFlavor.stringFlavor))\r
  89             throw new UnsupportedFlavorException(DataFlavor.stringFlavor);\r
  90 \r
  91         String dropData = (String) transferable.getTransferData(DataFlavor.stringFlavor);\r
  92         ResourceTransferData result = readStringTransferable(serializer, dropData);\r
  93         return result;\r
  94     }\r
  95 \r
  96     public static ResourceTransferData readSwtTextTransferable(SerialisationSupport serializer, TransferData transferData)\r
  97     throws IOException, IllegalArgumentException, DatabaseException\r
  98     {\r
  99         if (!TextTransfer.getInstance().isSupportedType(transferData))\r
 100             throw new IllegalArgumentException("argument is not text transfer");\r
 101         String dropData = TextTransfer.getInstance().nativeToJava(transferData).toString();\r
 102         ResourceTransferData result = readStringTransferable(serializer, dropData);\r
 103         return result;\r
 104     }\r
 105 \r
 106 }\r