javax.activation: class: DataSourceDataContentHandler

javax.activation
class: DataSourceDataContentHandler [javadoc | source]

java.lang.Object
   javax.activation.DataSourceDataContentHandler

All Implemented Interfaces:
DataContentHandler

Direct Known Subclasses:
DataSourceDataContentHandler

Data content handler using an existing DCH and a data source.

author:

 -  href='mailto:dog@gnu.org'>Chris Burdess

version: 1.0.2 -










    







    












    Constructor:
 public DataSourceDataContentHandler(DataContentHandler dch,
    DataSource ds) {
        this.ds = ds;
        this.dch = dch;
}









    Method from javax.activation.DataSourceDataContentHandler Summary:

getContent,   getTransferData,   getTransferDataFlavors,   writeTo
Methods from java.lang.Object:

clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait
Method from javax.activation.DataSourceDataContentHandler Detail:
 public Object getContent(DataSource ds) throws IOException {
        if (dch != null)
            return dch.getContent(ds);
        else
            return ds.getInputStream();
}
 public Object getTransferData(DataFlavor flavor,
    DataSource ds) throws UnsupportedFlavorException, IOException {
        if (dch != null)
            return dch.getTransferData(flavor, ds);
        DataFlavor[] flavors = getTransferDataFlavors();
        if (flavors.length  > 0 && flavor.equals(flavors[0]))
            return ds.getInputStream();
        else
            throw new UnsupportedFlavorException(flavor);
}
 public DataFlavor[] getTransferDataFlavors() {
        if (flavors == null)
        {
            if (dch != null)
                flavors = dch.getTransferDataFlavors();
            else
            {
                String mimeType = ds.getContentType();
                flavors = new DataFlavor[1];
                flavors[0] = new ActivationDataFlavor(mimeType, mimeType);
            }
        }
        return flavors;
}
 public  void writeTo(Object obj,
    String mimeType,
    OutputStream out) throws IOException {
        if (dch == null)
            throw new UnsupportedDataTypeException(
                    "no DCH for content type " + ds.getContentType());
        dch.writeTo(obj, mimeType, out);
}