mirror of git://gcc.gnu.org/git/gcc.git
81 lines
2.9 KiB
Java
81 lines
2.9 KiB
Java
/* ContentHandler.java -- Abstract class for handling content from URL's
|
|
Copyright (C) 1998, 1999 2000, 2001 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
As a special exception, if you link this library with other files to
|
|
produce an executable, this library does not by itself cause the
|
|
resulting executable to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why the
|
|
executable file might be covered by the GNU General Public License. */
|
|
|
|
package java.net;
|
|
|
|
import java.io.IOException;
|
|
|
|
/**
|
|
* Written using on-line Java Platform 1.2 API Specification, as well
|
|
* as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
|
|
* Status: Believed complete and correct.
|
|
*/
|
|
|
|
/**
|
|
* This is an abstract class that is the superclass for classes that read
|
|
* objects from URL's. Calling the <code>getContent()</code> method in the
|
|
* <code>URL</code> class or the <code>URLConnection</code> class will cause
|
|
* an instance of a subclass of <code>ContentHandler</code> to be created for
|
|
* the MIME type of the object being downloaded from the URL. Thus, this
|
|
* class is seldom needed by applications/applets directly, but only
|
|
* indirectly through methods in other classes.
|
|
*
|
|
* @author Aaron M. Renn (arenn@urbanophile.com)
|
|
* @author Warren Levy <warrenl@cygnus.com>
|
|
*/
|
|
public abstract class ContentHandler
|
|
{
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Constructors
|
|
*/
|
|
|
|
/**
|
|
* Default, no-argument constructor.
|
|
*/
|
|
public ContentHandler() { }
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method reads from the <code>InputStream</code> of the passed in URL
|
|
* connection and uses the data downloaded to create an <code>Object</code>
|
|
* represening the content. For example, if the URL is pointing to a GIF
|
|
* file, this method might return an <code>Image</code> object. This method
|
|
* must be implemented by subclasses.
|
|
*
|
|
* @param urlc A <code>URLConnection</code> object to read data from.
|
|
*
|
|
* @return An object representing the data read
|
|
*
|
|
* @exception IOException If an error occurs
|
|
*/
|
|
public abstract Object getContent(URLConnection urlc) throws IOException;
|
|
|
|
} // class ContentHandler
|