| JavaTM 2 Platform Std. Ed. v1.4.2
java.net
Class ContentHandler
java.lang.Object
 java.net.ContentHandler
- public abstract class ContentHandler
- extends Object
The abstract class ContentHandler is the superclass
of all classes that read an Object from a
URLConnection.
An application does not generally call the
getContent method in this class directly. Instead, an
application calls the getContent method in class
URL or in URLConnection.
The application's content handler factory (an instance of a class that
implements the interface ContentHandlerFactory set
up by a call to setContentHandler) is
called with a String giving the MIME type of the
object being received on the socket. The factory returns an
instance of a subclass of ContentHandler, and its
getContent method is called to create the object.
If no content handler could be found, URLConnection will
look for a content handler in a user-defineable set of places.
By default it looks in sun.net.www.content, but users can define a
vertical-bar delimited set of class prefixes to search through in
addition by defining the java.content.handler.pkgs property.
The class name must be of the form:
{package-prefix}.{major}.{minor}
e.g.
YoyoDyne.experimental.text.plain
If the loading of the content handler class would be performed by
a classloader that is outside of the the delegation chain of the caller,
the JVM will need the RuntimePermission "getClassLoader".
- Since:
- JDK1.0
- See Also:
getContent(java.net.URLConnection),
ContentHandlerFactory,
URL.getContent(),
URLConnection,
URLConnection.getContent(),
URLConnection.setContentHandlerFactory(java.net.ContentHandlerFactory)
|
Method Summary |
abstract Object |
getContent(URLConnection urlc)
Given a URL connect stream positioned at the beginning of the
representation of an object, this method reads that stream and
creates an object from it. |
Object |
getContent(URLConnection urlc,
Class[] classes)
Given a URL connect stream positioned at the beginning of the
representation of an object, this method reads that stream and
creates an object that matches one of the types specified. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ContentHandler
public ContentHandler()
getContent
public abstract Object getContent(URLConnection urlc)
throws IOException
- Given a URL connect stream positioned at the beginning of the
representation of an object, this method reads that stream and
creates an object from it.
- Parameters:
urlc - a URL connection.
- Returns:
- the object read by the
ContentHandler.
- Throws:
IOException - if an I/O error occurs while reading the object.
getContent
public Object getContent(URLConnection urlc,
Class[] classes)
throws IOException
- Given a URL connect stream positioned at the beginning of the
representation of an object, this method reads that stream and
creates an object that matches one of the types specified.
The default implementation of this method should call getContent()
and screen the return type for a match of the suggested types.
- Parameters:
urlc - a URL connection.classes - an array of types requested
- Returns:
- the object read by the
ContentHandler that is
the first match of the suggested types.
null if none of the requested are supported.
- Throws:
IOException - if an I/O error occurs while reading the object.
Copyright 2003 Sun Microsystems, Inc. All rights reserved
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