Package com.nwalsh.saxon

Class UnwrapLinksEmitter

java.lang.Object

com.icl.saxon.output.Emitter

com.nwalsh.saxon.CopyEmitter

com.nwalsh.saxon.UnwrapLinksEmitter

All Implemented Interfaces:

javax.xml.transform.Result

public class UnwrapLinksEmitter
extends CopyEmitter

Saxon extension to unwrap links in a result tree fragment.

$Id: UnwrapLinksEmitter.java 1731 2002-06-26 11:03:05Z nwalsh $

Copyright (C) 2000, 2002 Norman Walsh.

This class provides the guts of a Saxon 6.* implementation of a link unwrapper.

The general design is this: the stylesheets construct a result tree fragment for some environment. Then the result tree fragment is "replayed" through the UnwrapLinksEmitter; the UnwrapLinksEmitter builds a new result tree fragment from this event stream with top-level links unwrapped. That RTF is returned. Note that only a single level of unwrapping is performed. This is clearly a crude implementation.

Change Log:

1.0

Initial release.

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.Stack	elementStack	A stack for the preserving information about open elements.
protected boolean	foStylesheet	Is the stylesheet currently running an FO stylesheet?
protected static java.lang.String	foURI	The FO namespace name.
protected int	htmlAFingerprint
protected boolean	inSkip
protected int	linkDepth	Are we currently in a link? How deep?
protected java.util.Stack	saveStack
protected int	skipDepth
protected boolean	tryAgain
protected int	xhtmlAFingerprint
protected static java.lang.String	xhURI	The XHTML namespace name.

Fields inherited from class com.nwalsh.saxon.CopyEmitter

namePool, rtf, rtfEmitter

Fields inherited from class com.icl.saxon.output.Emitter

locator, outputProperties, outputStream, systemId, writer

Fields inherited from interface javax.xml.transform.Result

PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING

Constructor Summary

Constructors

Constructor	Description
UnwrapLinksEmitter(com.icl.saxon.Controller controller, com.icl.saxon.om.NamePool namePool, boolean foStylesheet)	Constructor for the UnwrapLinksEmitter.

Method Summary

Modifier and Type	Method	Description
void	endElement(int nameCode)	Process end element events.
void	startElement(int nameCode, org.xml.sax.Attributes attributes, int[] namespaces, int nscount)	Process start element events.
boolean	tryAgain()

Methods inherited from class com.nwalsh.saxon.CopyEmitter

characters, comment, endDocument, getResultTreeFragment, processingInstruction, setDocumentLocator, setEscaping, setNamePool, setUnparsedEntity, setWriter, startDocument

Methods inherited from class com.icl.saxon.output.Emitter

getNamePool, getOutputProperties, getOutputStream, getSystemId, getWriter, makeEmitter, setOutputProperties, setOutputStream, setSystemId, usesWriter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

elementStack

protected java.util.Stack elementStack

A stack for the preserving information about open elements.

saveStack

protected java.util.Stack saveStack

foURI

protected static java.lang.String foURI

The FO namespace name.

xhURI

protected static java.lang.String xhURI

The XHTML namespace name.

foStylesheet

protected boolean foStylesheet

Is the stylesheet currently running an FO stylesheet?

linkDepth

protected int linkDepth

Are we currently in a link? How deep?

skipDepth

protected int skipDepth

htmlAFingerprint

protected int htmlAFingerprint

xhtmlAFingerprint

protected int xhtmlAFingerprint

inSkip

protected boolean inSkip

tryAgain

protected boolean tryAgain

Constructor Detail

UnwrapLinksEmitter

public UnwrapLinksEmitter(com.icl.saxon.Controller controller,
                          com.icl.saxon.om.NamePool namePool,
                          boolean foStylesheet)

Constructor for the UnwrapLinksEmitter.

Parameters:

namePool - The name pool to use for constructing elements and attributes.

foStylesheet - Is this an FO stylesheet?

Method Detail

startElement

public void startElement(int nameCode,
                         org.xml.sax.Attributes attributes,
                         int[] namespaces,
                         int nscount)
                  throws javax.xml.transform.TransformerException

Process start element events.

Overrides:

startElement in class CopyEmitter

Throws:

javax.xml.transform.TransformerException

endElement

public void endElement(int nameCode)
                throws javax.xml.transform.TransformerException

Process end element events.

Overrides:

endElement in class CopyEmitter

Throws:

javax.xml.transform.TransformerException

tryAgain

public boolean tryAgain()
                 throws javax.xml.transform.TransformerException

Throws:

javax.xml.transform.TransformerException