com.nwalsh.saxon
Class ColumnScanEmitter

java.lang.Object
  com.icl.saxon.output.Emitter
      com.nwalsh.saxon.ColumnScanEmitter

All Implemented Interfaces:

javax.xml.transform.Result

public class ColumnScanEmitter
extends com.icl.saxon.output.Emitter

Saxon extension to scan the column widthsin a result tree fragment.

$Id: ColumnScanEmitter.java,v 1.2 2002/11/15 13:49:42 nwalsh Exp $

Copyright (C) 2000 Norman Walsh.

This class provides a Saxon 6.* implementation to scan the column widths in a result tree fragment.

The general design is this: the stylesheets construct a result tree fragment for some colgroup environment. That result tree fragment is "replayed" through the ColumnScanEmitter; the ColumnScanEmitter watches the cols go by and extracts the column widths that it sees. These widths are then made available.

Change Log:

1.0

Initial release.

Version:

$Id: ColumnScanEmitter.java,v 1.2 2002/11/15 13:49:42 nwalsh Exp $

Author:

Norman Walsh ndw@nwalsh.com

Field Summary

protected static java.lang.String	foURI The FO namespace name.
protected com.icl.saxon.om.NamePool	namePool
protected int	numColumns The number of columns seen.
protected java.lang.String[]	width

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

ColumnScanEmitter(com.icl.saxon.om.NamePool namePool)
Construct a new ColumnScanEmitter.

Method Summary

void	characters(char[] chars, int start, int len) Discarded.
int	columnCount() Return the number of columns.
java.lang.String[]	columnWidths() Return the number of columns.
void	comment(char[] chars, int start, int length) Discarded.
void	endDocument() Discarded.
void	endElement(int nameCode) Discarded.
void	processingInstruction(java.lang.String name, java.lang.String data) Discarded.
void	setDocumentLocator(org.xml.sax.Locator locator) Discarded.
void	setEscaping(boolean escaping) Discarded.
void	setNamePool(com.icl.saxon.om.NamePool namePool) Discarded.
void	setUnparsedEntity(java.lang.String name, java.lang.String uri) Discarded.
void	setWriter(java.io.Writer writer) Discarded.
void	startDocument() Discarded.
void	startElement(int nameCode, org.xml.sax.Attributes attributes, int[] namespaces, int nscount) Examine for column info.

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

numColumns

protected int numColumns

The number of columns seen.

width

protected java.lang.String[] width

namePool

protected com.icl.saxon.om.NamePool namePool

foURI

protected static java.lang.String foURI

The FO namespace name.

Constructor Detail

ColumnScanEmitter

public ColumnScanEmitter(com.icl.saxon.om.NamePool namePool)

Construct a new ColumnScanEmitter.

Method Detail

columnCount

public int columnCount()

Return the number of columns.

columnWidths

public java.lang.String[] columnWidths()

Return the number of columns.

characters

public void characters(char[] chars,
                       int start,
                       int len)
                throws javax.xml.transform.TransformerException

Discarded.

Specified by:

characters in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

comment

public void comment(char[] chars,
                    int start,
                    int length)
             throws javax.xml.transform.TransformerException

Discarded.

Specified by:

comment in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

endDocument

public void endDocument()
                 throws javax.xml.transform.TransformerException

Discarded.

Specified by:

endDocument in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

endElement

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

Discarded.

Specified by:

endElement in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

processingInstruction

public void processingInstruction(java.lang.String name,
                                  java.lang.String data)
                           throws javax.xml.transform.TransformerException

Discarded.

Specified by:

processingInstruction in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

setDocumentLocator

public void setDocumentLocator(org.xml.sax.Locator locator)

Discarded.

Overrides:

setDocumentLocator in class com.icl.saxon.output.Emitter

setEscaping

public void setEscaping(boolean escaping)
                 throws javax.xml.transform.TransformerException

Discarded.

Overrides:

setEscaping in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

setNamePool

public void setNamePool(com.icl.saxon.om.NamePool namePool)

Discarded.

Overrides:

setNamePool in class com.icl.saxon.output.Emitter

setUnparsedEntity

public void setUnparsedEntity(java.lang.String name,
                              java.lang.String uri)
                       throws javax.xml.transform.TransformerException

Discarded.

Overrides:

setUnparsedEntity in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

setWriter

public void setWriter(java.io.Writer writer)

Discarded.

Overrides:

setWriter in class com.icl.saxon.output.Emitter

startDocument

public void startDocument()
                   throws javax.xml.transform.TransformerException

Discarded.

Specified by:

startDocument in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException

startElement

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

Examine for column info.

Specified by:

startElement in class com.icl.saxon.output.Emitter

Throws:

javax.xml.transform.TransformerException