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/*
* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* Plain text file handler
*
* This class provides an example of a a replacement content handler for
* the text/plain content type. It reads the content of the URL, and prepends
* an additional message at the beginning.
*
* Note that the only restrictions on the package/class names are:
* 1) the package must end in the major type of the content type (such as
* text, image, application, etc).
* 2) the class name must be named with the subtype of the content type (for
* content type "text/plain", this would be "plain" as in this example; for
* content type "image/gif", the class name would be "gif", and the package
* name must end with ".image".
* 3) the class must be a subclass of ContentHandler.
* 4) It must define the getContent function.
*/
package COM.foo.content.text;
import java.net.ContentHandler;
import java.io.InputStream;
import java.net.URLConnection;
import java.io.IOException;
public class plain extends ContentHandler {
/**
* Returns one of several object types (this set may change in future
* versions):
* 1) instance of Thread:
* Invoke the thread to launch an external viewer.
* 2) instance of InputStream:
* Bring up the "Save to disk" dialog page to allow the content
* to be saved to disk.
* 3) instance of InputStreamImageSource:
* Load the image into HotJava in an image viewer page.
* 4) instance of String:
* Go to a new page with the string as the plain text content
* of that page.
*/
public Object getContent(URLConnection uc) {
try {
InputStream is = uc.getInputStream();
StringBuffer sb = new StringBuffer();
int c;
sb.append("[Content of " + uc.getURL() + "]\n\n");
sb.append("[This opening message brought to you by your plain/text\n");
sb.append("content handler. To remove this content handler, delete the\n");
sb.append("COM.foo.content.text directory from your class path and\n");
sb.append("the java.content.handler.pkgs property from your HotJava\n");
sb.append("properties file.]\n");
sb.append("----------------------------------------------------------------\n\n");
// Read the characters from the source, accumulate them into the string buffer.
// (Not the most efficient, but simplest for this example.)
while ((c = is.read()) >= 0) {
sb.append((char)c);
}
// Tidy up
is.close();
// Return the resulting string to our client (we're case 4 above)
return sb.toString();
} catch (IOException e) {
// For any exception, just return an indication of what went wrong.
return "Problem reading document: " + uc.getURL();
}
}
}
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