/*
* Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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*/
package javax.swing.text.html.parser;
import sun.awt.AppContext;
import javax.swing.text.html.HTMLEditorKit;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.DataInputStream;
import java.io.ObjectInputStream;
import java.io.Reader;
import java.io.Serializable;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Responsible for starting up a new DocumentParser
* each time its parse method is invoked. Stores a
* reference to the dtd.
*
* @author Sunita Mani
*/
public class ParserDelegator extends HTMLEditorKit.Parser implements Serializable {
private static final Object DTD_KEY = new Object();
protected static void setDefaultDTD() {
getDefaultDTD();
}
private static synchronized DTD getDefaultDTD() {
AppContext appContext = AppContext.getAppContext();
DTD dtd = (DTD) appContext.get(DTD_KEY);
if (dtd == null) {
DTD _dtd = null;
// (PENDING) Hate having to hard code!
String nm = "html32";
try {
_dtd = DTD.getDTD(nm);
} catch (IOException e) {
// (PENDING) UGLY!
System.out.println("Throw an exception: could not get default dtd: " + nm);
}
dtd = createDTD(_dtd, nm);
appContext.put(DTD_KEY, dtd);
}
return dtd;
}
protected static DTD createDTD(DTD dtd, String name) {
InputStream in = null;
boolean debug = true;
try {
String path = name + ".bdtd";
in = getResourceAsStream(path);
if (in != null) {
dtd.read(new DataInputStream(new BufferedInputStream(in)));
dtd.putDTDHash(name, dtd);
}
} catch (Exception e) {
System.out.println(e);
}
return dtd;
}
public ParserDelegator() {
setDefaultDTD();
}
public void parse(Reader r, HTMLEditorKit.ParserCallback cb, boolean ignoreCharSet) throws IOException {
new DocumentParser(getDefaultDTD()).parse(r, cb, ignoreCharSet);
}
/**
* Fetch a resource relative to the ParserDelegator classfile.
* If this is called on 1.2 the loading will occur under the
* protection of a doPrivileged call to allow the ParserDelegator
* to function when used in an applet.
*
* @param name the name of the resource, relative to the
* ParserDelegator class.
* @returns a stream representing the resource
*/
static InputStream getResourceAsStream(final String name) {
return AccessController.doPrivileged(
new PrivilegedAction<InputStream>() {
public InputStream run() {
return ParserDelegator.class.getResourceAsStream(name);
}
});
}
private void readObject(ObjectInputStream s)
throws ClassNotFoundException, IOException {
s.defaultReadObject();
setDefaultDTD();
}
}