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Java Standard Edition (SE)

DataSource


javax.activation

Interface DataSource

  • All Known Implementing Classes:
    FileDataSource, URLDataSource


    public interface DataSource
    The DataSource interface provides the JavaBeans Activation Framework with an abstraction of an arbitrary collection of data. It provides a type for that data as well as access to it in the form of InputStreams and OutputStreams where appropriate.
    Since:
    1.6
    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method and Description
      String getContentType()
      This method returns the MIME type of the data in the form of a string.
      InputStream getInputStream()
      This method returns an InputStream representing the data and throws the appropriate exception if it can not do so.
      String getName()
      Return the name of this object where the name of the object is dependant on the nature of the underlying objects.
      OutputStream getOutputStream()
      This method returns an OutputStream where the data can be written and throws the appropriate exception if it can not do so.
    • Method Detail

      • getInputStream

        InputStream getInputStream()
                            throws IOException
        This method returns an InputStream representing the data and throws the appropriate exception if it can not do so. Note that a new InputStream object must be returned each time this method is called, and the stream must be positioned at the beginning of the data.
        Returns:
        an InputStream
        Throws:
        IOException
      • getOutputStream

        OutputStream getOutputStream()
                              throws IOException
        This method returns an OutputStream where the data can be written and throws the appropriate exception if it can not do so. Note that a new OutputStream object must be returned each time this method is called, and the stream must be positioned at the location the data is to be written.
        Returns:
        an OutputStream
        Throws:
        IOException
      • getContentType

        String getContentType()
        This method returns the MIME type of the data in the form of a string. It should always return a valid type. It is suggested that getContentType return "application/octet-stream" if the DataSource implementation can not determine the data type.
        Returns:
        the MIME Type
      • getName

        String getName()
        Return the name of this object where the name of the object is dependant on the nature of the underlying objects. DataSources encapsulating files may choose to return the filename of the object. (Typically this would be the last component of the filename, not an entire pathname.)
        Returns:
        the name of the object.


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