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

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