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-/* ContentHandler.java -- Abstract class for handling content from URL's
- Copyright (C) 1998, 1999, 2000, 2001, 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-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()
- {
- }
-
- /*
- * Instance Methods
- */
-
- /**
- * 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;
-
- /**
- * 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. This method uses the list of
- * supplied classes as candidate types. If the data read doesn't match
- * any of the supplied type, <code>null</code> is returned.
- *
- * @param urlc A <code>URLConnection</code> object to read data from.
- * @param classes An array of types of objects that are candidate types
- * for the data to be read.
- *
- * @return An object representing the data read, or <code>null</code>
- * if the data does not match any of the candidate types.
- *
- * @exception IOException If an error occurs
- *
- * @since 1.3
- */
- public Object getContent(URLConnection urlc, Class[] classes)
- throws IOException
- {
- Object obj = getContent(urlc);
-
- for (int i = 0; i < classes.length; i++)
- {
- if (classes[i].isInstance(obj))
- return obj;
- }
-
- return null;
- }
-} // class ContentHandler