javax.activation
Class URLDataSource
java.lang.Object
|
+--javax.activation.URLDataSource
- All Implemented Interfaces:
- DataSource
- public class URLDataSource
- extends Object
- implements DataSource
The URLDataSource class provides an object that wraps a URL
object in a DataSource interface. URLDataSource simplifies the handling
of data described by URLs within the JavaBeans Activation Framework
because this class can be used to create new DataHandlers. NOTE: The
DataHandler object creates a URLDataSource internally,
when it is constructed with a URL.
- See Also:
DataSource
,
DataHandler
Methods inherited from class java.lang.Object |
, clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
URLDataSource
public URLDataSource(URL url)
- URLDataSource constructor. The URLDataSource class will
not open a connection to the URL until a method requiring it
to do so is called.
- Parameters:
url
- The URL to be encapsulated in this object.
getContentType
public String getContentType()
- Returns the value of the URL content-type header field.
It calls the URL's
URLConnection.getContentType
method
after retrieving a URLConnection object.
Note: this method attempts to call the openConnection
method on the URL. If this method fails, or if a content type is not
returned from the URLConnection, getContentType returns
"application/octet-stream" as the content type.
- Specified by:
getContentType
in interface DataSource
- Returns:
- the content type.
getName
public String getName()
- Calls the
getFile
method on the URL used to
instantiate the object.
- Specified by:
getName
in interface DataSource
- Returns:
- the result of calling the URL's getFile method.
getInputStream
public InputStream getInputStream()
throws IOException
- The getInputStream method from the URL. Calls the
openStream
method on the URL.
- Specified by:
getInputStream
in interface DataSource
- Returns:
- the InputStream.
getOutputStream
public OutputStream getOutputStream()
throws IOException
- The getOutputStream method from the URL. First an attempt is
made to get the URLConnection object for the URL. If that
succeeds, the getOutputStream method on the URLConnection
is returned.
- Specified by:
getOutputStream
in interface DataSource
- Returns:
- the OutputStream.
getURL
public URL getURL()
- Return the URL used to create this DataSource.
- Returns:
- The URL.