Examples of java.awt.datatransfer.DataFlavor

java.awt.datatransfer.DataFlavor
etf.org/rfc/rfc2045.txt">RFC 2045 and RFC 2046. A content type is typically referred to as a MIME type.
A content type consists of a media type (referred to as the primary type), a subtype, and optional parameters. See RFC 2045 for details on the syntax of a MIME type.
The JRE data transfer implementation interprets the parameter "class" of a MIME type as a representation class. The representation class reflects the class of the object being transferred. In other words, the representation class is the type of object returned by {@link Transferable#getTransferData}. For example, the MIME type of {@link #imageFlavor} is{@code "image/x-java-image;class=java.awt.Image"}, the primary type is {@code image}, the subtype is {@code x-java-image}, and the representation class is {@code java.awt.Image}. When {@code getTransferData} is invokedwith a {@code DataFlavor} of {@code imageFlavor}, an instance of {@code java.awt.Image} is returned.It's important to note that {@code DataFlavor} does no error checkingagainst the representation class. It is up to consumers of {@code DataFlavor}, such as {@code Transferable}, to honor the representation class.
Note, if you do not specify a representation class when creating a {@code DataFlavor}, the default representation class is used. See appropriate documentation for {@code DataFlavor}'s constructors.
Also, {@code DataFlavor} instances with the "text" primaryMIME type may have a "charset" parameter. Refer to RFC 2046 and {@link #selectBestTextFlavor} for details on "text" MIME typesand the "charset" parameter.
Equality of {@code DataFlavors} is determined by the primary type,subtype, and representation class. Refer to {@link #equals(DataFlavor)} fordetails. When determining equality, any optional parameters are ignored. For example, the following produces two {@code DataFlavors} thatare considered identical:
```
 DataFlavor flavor1 = new DataFlavor(Object.class, "X-test/test; class=<java.lang.Object>; foo=bar"); DataFlavor flavor2 = new DataFlavor(Object.class, "X-test/test; class=<java.lang.Object>; x=y"); // The following returns true. flavor1.equals(flavor2); 
```
As mentioned, {@code flavor1} and {@code flavor2} are considered identical.As such, asking a {@code Transferable} for either {@code DataFlavor} returnsthe same results.
For more information on the using data transfer with Swing see the How to Use Drag and Drop and Data Transfer, section in Java Tutorial. @version 1.83, 07/28/06 @author Blake Sullivan @author Laurence P. G. Cable @author Jeff Dunn

    /**
     * return the DataFlavors for this <code>DataContentHandler</code>
     * @return The DataFlavors.
     */
    public DataFlavor[] getTransferDataFlavors() { // throws Exception;
        DataFlavor flavors[] = new DataFlavor[1];


        try {
            flavors[0] =
                new ActivationDataFlavor(
                    Class.forName(STR_SRC),

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    /**
     * return the DataFlavors for this <code>DataContentHandler</code>
     * @return The DataFlavors.
     */
    public DataFlavor[] getTransferDataFlavors() { // throws Exception;
        DataFlavor flavors[] = new DataFlavor[2];


        flavors[0] =
            new ActivationDataFlavor(streamSourceClass, "text/xml", "XML");
        flavors[1] =
            new ActivationDataFlavor(streamSourceClass, "application/xml", "XML");

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    /**
     * return the DataFlavors for this <code>DataContentHandler</code>
     * @return The DataFlavors.
     */
    public DataFlavor[] getTransferDataFlavors() { // throws Exception;
        DataFlavor flavors[] = new DataFlavor[1];
        flavors[0] = new ActivationDataFlavor(
                FastInfosetReflection.getFastInfosetSource_class(), 
                "application/fastinfoset", "Fast Infoset");
        return flavors;
    }

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    public void handleDrop(DropTargetDropEvent e, Transferable t)
                    throws Exception
    {
        System.out.println("Starting dropAttempt");


        DataFlavor chosen = DataFlavor.javaFileListFlavor;
        DataFlavor second = FileTransferable.plainTextFlavor;
        DataFlavor flavor = null;
        Object data = null;


        if(e != null)
        {
            flavor = e.getCurrentDataFlavors()[0];
            e.acceptDrop(acceptableActions);


            Class c = flavor.getDefaultRepresentationClass();
        }


        if(flavor == null)
        {
            flavor = second;

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    DataFlavor[] df = t.getTransferDataFlavors();


    if (df == null || df.length == 0)
      return;
    for (int i = 0; i < df.length; ++i) {
      DataFlavor flavor = df[i];
      Object o = null;
      if (true) {
        Logger.info("df " + i + " flavor " + flavor);
        Logger.info("  class: " + flavor.getRepresentationClass().getName());
        Logger.info("  mime : " + flavor.getMimeType());
      }


      if (flavor.getMimeType().startsWith("text/uri-list")
          && flavor.getRepresentationClass().getName().equals(
              "java.lang.String")) {


        /*
         * This is one of the (many) flavors that KDE provides: df 2 flavour
         * java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;
         * representationclass=java.lang.String] java.lang.String String: file
         * :/home/egonw/data/Projects/SourceForge/Jmol/Jmol-HEAD/samples/
         * cml/methanol2.cml
         * 
         * A later KDE version gave me the following. Note the mime!! hence the
         * startsWith above
         * 
         * df 3 flavor java.awt.datatransfer.DataFlavor[mimetype=text/uri-list
         * ;representationclass=java.lang.String] class: java.lang.String mime :
         * text/uri-list; class=java.lang.String; charset=Unicode
         */


        try {
          o = null;
          if (!isAccepted)
            dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
          isAccepted = true;
          o = t.getTransferData(flavor);
        } catch (Exception e) {
          Logger.error(null, e);
        }


        if (o instanceof String) {
          if (Logger.debugging) {
            Logger.debug("  String: " + o.toString());
          }
          loadFile(o.toString());
          dtde.getDropTargetContext().dropComplete(true);
          return;
        }
      } else if (flavor.getMimeType().equals(
          "application/x-java-serialized-object; class=java.lang.String")) {


        /*
         * This is one of the flavors that jEdit provides:
         *

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  WebPanel webPanel;


  ArrayListTransferHandler(WebPanel webPanel) {
    this.webPanel = webPanel;
    try {
      localArrayListFlavor = new DataFlavor(localArrayListType);
    } catch (ClassNotFoundException e) {
      System.out
          .println("ArrayListTransferHandler: unable to create data flavor");
    }
    serialArrayListFlavor = new DataFlavor(ArrayList.class, "ArrayList");
  }

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    }


    private DataFlavor getPrefferedFlavor(final Transferable t,
                                          final Class propertyType) {
        DataFlavor[] flavors = t.getTransferDataFlavors();
        DataFlavor result = null;
        for(int i = 0; i < flavors.length; i ++) {
            result = flavors[i];
            if (propertyType.isAssignableFrom(result
                                              .getRepresentationClass())) {
                return result;
            }
        }
        return null;

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        PropertyDescriptor descriptor = getPropertyDescriptor(c);
        if (descriptor == null) {
            return false;
        }
        Class propertyType = descriptor.getPropertyType();
        DataFlavor flavor = getPrefferedFlavor(t, propertyType);
        if (flavor == null) {
            return false;
        }


        try {

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        }


        int length = flavors.length;
        Class propertyType = descriptor.getPropertyType();
        for (int i = 0; i < length; i++) {
            DataFlavor flavor = flavors[i];
            if (DataFlavor.javaJVMLocalObjectMimeType.equals(flavor
                                 .getHumanPresentableName())
                    && propertyType.equals(flavor.getRepresentationClass())) {
                return true;
            }
        }
        return false;
    }

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            } catch (InvocationTargetException e) {
            } catch (IllegalAccessException e) {
            }
            String mimeType = MIME_PREFIX
                 + descriptor.getPropertyType().getName();
            DataFlavor flavor  = null;
            try {
                flavor = new DataFlavor(mimeType);
            } catch (ClassNotFoundException e) {


            }
            flavors = new DataFlavor[]{flavor};
        }

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