org.apache.commons.jelly
Class XMLOutput

java.lang.Object
  extended byorg.apache.commons.jelly.XMLOutput
All Implemented Interfaces:
org.xml.sax.ContentHandler, org.xml.sax.ext.LexicalHandler

public class XMLOutput
extends java.lang.Object
implements org.xml.sax.ContentHandler, org.xml.sax.ext.LexicalHandler

XMLOutput is used to output XML events in a SAX-like manner. This also allows pipelining to be done such as in the Cocoon project.

Version:
$Revision: 225599 $
Author:
James Strachan

Field Summary
protected static java.lang.String[] LEXICAL_HANDLER_NAMES
           
 
Constructor Summary
XMLOutput()
           
XMLOutput(org.xml.sax.ContentHandler contentHandler)
          The XML-output will relay the SAX events to the indicated contentHandler.
XMLOutput(org.xml.sax.ContentHandler contentHandler, org.xml.sax.ext.LexicalHandler lexicalHandler)
          The XML-output will relay the SAX events to the indicated content-handler lexical-handler.
 
Method Summary
 void characters(char[] ch, int start, int length)
          Receive notification of character data.
 void close()
          Provides a useful hook that implementations can use to close the underlying OutputStream or Writer.
 void comment(char[] ch, int start, int length)
          Report an XML comment anywhere in the document.
static XMLOutput createDummyXMLOutput()
          returns an XMLOutput object that will discard all tag-generated XML events.
static XMLOutput createXMLOutput(java.io.OutputStream out)
          Creates a text based XMLOutput which converts all XML events into text and writes to the underlying OutputStream.
static XMLOutput createXMLOutput(java.io.OutputStream out, boolean escapeText)
          Creates a text based XMLOutput which converts all XML events into text and writes to the underlying OutputStream.
static XMLOutput createXMLOutput(java.io.Writer writer)
          Creates a text based XMLOutput which converts all XML events into text and writes to the underlying Writer.
static XMLOutput createXMLOutput(java.io.Writer writer, boolean escapeText)
          Creates a text based XMLOutput which converts all XML events into text and writes to the underlying Writer.
static XMLOutput createXMLOutput(org.xml.sax.XMLReader xmlReader)
          Creates an XMLOutput from an existing SAX XMLReader.
protected static XMLOutput createXMLOutput(org.dom4j.io.XMLWriter xmlWriter)
          Factory method to create a new XMLOutput from an XMLWriter
 void endCDATA()
          Report the end of a CDATA section.
 void endDocument()
          Receive notification of the end of a document.
 void endDTD()
          Report the end of DTD declarations.
 void endElement(java.lang.String localName)
          Helper method for outputting an end element event for an element in no namespace.
 void endElement(java.lang.String uri, java.lang.String localName, java.lang.String qName)
          Receive notification of the end of an element.
 void endEntity(java.lang.String name)
          Report the end of an entity.
 void endPrefixMapping(java.lang.String prefix)
          End the scope of a prefix-URI mapping.
 void flush()
          Flushes the underlying stream if XMLWriter or XMLOutput.
 org.xml.sax.ContentHandler getContentHandler()
           
 org.xml.sax.ext.LexicalHandler getLexicalHandler()
           
 void ignorableWhitespace(char[] ch, int start, int length)
          Receive notification of ignorable whitespace in element content.
 void objectData(java.lang.Object object)
          Pass data through the pipline.
 void processingInstruction(java.lang.String target, java.lang.String data)
          Receive notification of a processing instruction.
 void setContentHandler(org.xml.sax.ContentHandler contentHandler)
          Sets the SAX ContentHandler to pipe SAX events into
 void setDocumentLocator(org.xml.sax.Locator locator)
          Receive an object for locating the origin of SAX document events.
 void setLexicalHandler(org.xml.sax.ext.LexicalHandler lexicalHandler)
          Sets the SAX LexicalHandler to pipe SAX events into
 void skippedEntity(java.lang.String name)
          Receive notification of a skipped entity.
 void startCDATA()
          Report the start of a CDATA section.
 void startDocument()
          Receive notification of the beginning of a document.
 void startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId)
          Report the start of DTD declarations, if any.
 void startElement(java.lang.String localName)
          Helper method for outputting a start element event for an element in no namespace.
 void startElement(java.lang.String localName, org.xml.sax.Attributes attributes)
          Helper method for outputting a start element event for an element in no namespace.
 void startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes atts)
          Receive notification of the beginning of an element.
 void startEntity(java.lang.String name)
          Report the beginning of some internal and external XML entities.
 void startPrefixMapping(java.lang.String prefix, java.lang.String uri)
          Begin the scope of a prefix-URI Namespace mapping.
 java.lang.String toString()
           
 void write(java.lang.String text)
          Outputs the given String as a piece of valid text in the XML event stream.
 void writeCDATA(java.lang.String text)
          Outputs the given String as a piece of CDATA in the XML event stream.
 void writeComment(java.lang.String text)
          Outputs a comment to the XML stream.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

LEXICAL_HANDLER_NAMES

protected static final java.lang.String[] LEXICAL_HANDLER_NAMES
Constructor Detail

XMLOutput

public XMLOutput()

XMLOutput

public XMLOutput(org.xml.sax.ContentHandler contentHandler)
The XML-output will relay the SAX events to the indicated contentHandler.

Parameters:
contentHandler -

XMLOutput

public XMLOutput(org.xml.sax.ContentHandler contentHandler,
                 org.xml.sax.ext.LexicalHandler lexicalHandler)
The XML-output will relay the SAX events to the indicated content-handler lexical-handler.

Parameters:
contentHandler -
lexicalHandler -
Method Detail

toString

public java.lang.String toString()

close

public void close()
           throws java.io.IOException
Provides a useful hook that implementations can use to close the underlying OutputStream or Writer.

Throws:
java.io.IOException

flush

public void flush()
           throws java.io.IOException
Flushes the underlying stream if XMLWriter or XMLOutput.

Throws:
java.io.IOException

createXMLOutput

public static XMLOutput createXMLOutput(org.xml.sax.XMLReader xmlReader)
Creates an XMLOutput from an existing SAX XMLReader.


createXMLOutput

public static XMLOutput createXMLOutput(java.io.Writer writer)
Creates a text based XMLOutput which converts all XML events into text and writes to the underlying Writer.


createXMLOutput

public static XMLOutput createXMLOutput(java.io.Writer writer,
                                        boolean escapeText)
Creates a text based XMLOutput which converts all XML events into text and writes to the underlying Writer.

Parameters:
writer - is the writer to output to
escapeText - is whether or not text output will be escaped. This must be true if the underlying output is XML or could be false if the underlying output is textual.

createXMLOutput

public static XMLOutput createXMLOutput(java.io.OutputStream out)
                                 throws java.io.UnsupportedEncodingException
Creates a text based XMLOutput which converts all XML events into text and writes to the underlying OutputStream.

Throws:
java.io.UnsupportedEncodingException

createXMLOutput

public static XMLOutput createXMLOutput(java.io.OutputStream out,
                                        boolean escapeText)
                                 throws java.io.UnsupportedEncodingException
Creates a text based XMLOutput which converts all XML events into text and writes to the underlying OutputStream.

Parameters:
out - is the output stream to write
escapeText - is whether or not text output will be escaped. This must be true if the underlying output is XML or could be false if the underlying output is textual.
Throws:
java.io.UnsupportedEncodingException - if the underlying write could not be created.

createDummyXMLOutput

public static XMLOutput createDummyXMLOutput()
returns an XMLOutput object that will discard all tag-generated XML events. Useful when tag output is not expected or not significant.

Returns:
a no-op XMLOutput

write

public void write(java.lang.String text)
           throws org.xml.sax.SAXException
Outputs the given String as a piece of valid text in the XML event stream. Any special XML characters should come out properly escaped.

Throws:
org.xml.sax.SAXException

writeCDATA

public void writeCDATA(java.lang.String text)
                throws org.xml.sax.SAXException
Outputs the given String as a piece of CDATA in the XML event stream.

Throws:
org.xml.sax.SAXException

writeComment

public void writeComment(java.lang.String text)
                  throws org.xml.sax.SAXException
Outputs a comment to the XML stream.

Throws:
org.xml.sax.SAXException

startElement

public void startElement(java.lang.String localName)
                  throws org.xml.sax.SAXException
Helper method for outputting a start element event for an element in no namespace.

Throws:
org.xml.sax.SAXException

startElement

public void startElement(java.lang.String localName,
                         org.xml.sax.Attributes attributes)
                  throws org.xml.sax.SAXException
Helper method for outputting a start element event for an element in no namespace.

Throws:
org.xml.sax.SAXException

endElement

public void endElement(java.lang.String localName)
                throws org.xml.sax.SAXException
Helper method for outputting an end element event for an element in no namespace.

Throws:
org.xml.sax.SAXException

setDocumentLocator

public void setDocumentLocator(org.xml.sax.Locator locator)
Receive an object for locating the origin of SAX document events.

SAX parsers are strongly encouraged (though not absolutely required) to supply a locator: if it does so, it must supply the locator to the application by invoking this method before invoking any of the other methods in the ContentHandler interface.

The locator allows the application to determine the end position of any document-related event, even if the parser is not reporting an error. Typically, the application will use this information for reporting its own errors (such as character content that does not match an application's business rules). The information returned by the locator is probably not sufficient for use with a search engine.

Note that the locator will return correct information only during the invocation of the events in this interface. The application should not attempt to use it at any other time.

Specified by:
setDocumentLocator in interface org.xml.sax.ContentHandler
Parameters:
locator - An object that can return the location of any SAX document event.
See Also:
Locator

startDocument

public void startDocument()
                   throws org.xml.sax.SAXException
Receive notification of the beginning of a document.

The SAX parser will invoke this method only once, before any other event callbacks (except for setDocumentLocator).

Specified by:
startDocument in interface org.xml.sax.ContentHandler
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
endDocument()

endDocument

public void endDocument()
                 throws org.xml.sax.SAXException
Receive notification of the end of a document.

The SAX parser will invoke this method only once, and it will be the last method invoked during the parse. The parser shall not invoke this method until it has either abandoned parsing (because of an unrecoverable error) or reached the end of input.

Specified by:
endDocument in interface org.xml.sax.ContentHandler
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
startDocument()

startPrefixMapping

public void startPrefixMapping(java.lang.String prefix,
                               java.lang.String uri)
                        throws org.xml.sax.SAXException
Begin the scope of a prefix-URI Namespace mapping.

The information from this event is not necessary for normal Namespace processing: the SAX XML reader will automatically replace prefixes for element and attribute names when the http://xml.org/sax/features/namespaces feature is true (the default).

There are cases, however, when applications need to use prefixes in character data or in attribute values, where they cannot safely be expanded automatically; the start/endPrefixMapping event supplies the information to the application to expand prefixes in those contexts itself, if necessary.

Note that start/endPrefixMapping events are not guaranteed to be properly nested relative to each other: all startPrefixMapping events will occur immediately before the corresponding startElement event, and all endPrefixMapping events will occur immediately after the corresponding endElement event, but their order is not otherwise guaranteed.

There should never be start/endPrefixMapping events for the "xml" prefix, since it is predeclared and immutable.

Specified by:
startPrefixMapping in interface org.xml.sax.ContentHandler
Parameters:
prefix - The Namespace prefix being declared. An empty string is used for the default element namespace, which has no prefix.
uri - The Namespace URI the prefix is mapped to.
Throws:
org.xml.sax.SAXException - The client may throw an exception during processing.
See Also:
endPrefixMapping(java.lang.String), startElement(java.lang.String)

endPrefixMapping

public void endPrefixMapping(java.lang.String prefix)
                      throws org.xml.sax.SAXException
End the scope of a prefix-URI mapping.

See startPrefixMapping for details. These events will always occur immediately after the corresponding endElement event, but the order of endPrefixMapping events is not otherwise guaranteed.

Specified by:
endPrefixMapping in interface org.xml.sax.ContentHandler
Parameters:
prefix - The prefix that was being mapped. This is the empty string when a default mapping scope ends.
Throws:
org.xml.sax.SAXException - The client may throw an exception during processing.
See Also:
startPrefixMapping(java.lang.String, java.lang.String), endElement(java.lang.String)

startElement

public void startElement(java.lang.String uri,
                         java.lang.String localName,
                         java.lang.String qName,
                         org.xml.sax.Attributes atts)
                  throws org.xml.sax.SAXException
Receive notification of the beginning of an element.

The Parser will invoke this method at the beginning of every element in the XML document; there will be a corresponding endElement event for every startElement event (even when the element is empty). All of the element's content will be reported, in order, before the corresponding endElement event.

This event allows up to three name components for each element:

  1. the Namespace URI;
  2. the local name; and
  3. the qualified (prefixed) name.

Any or all of these may be provided, depending on the values of the http://xml.org/sax/features/namespaces and the http://xml.org/sax/features/namespace-prefixes properties:

Note that the attribute list provided will contain only attributes with explicit values (specified or defaulted): #IMPLIED attributes will be omitted. The attribute list will contain attributes used for Namespace declarations (xmlns* attributes) only if the http://xml.org/sax/features/namespace-prefixes property is true (it is false by default, and support for a true value is optional).

Like characters(), attribute values may have characters that need more than one char value.

Specified by:
startElement in interface org.xml.sax.ContentHandler
Parameters:
uri - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.
localName - The local name (without prefix), or the empty string if Namespace processing is not being performed.
qName - The qualified name (with prefix), or the empty string if qualified names are not available.
atts - The attributes attached to the element. If there are no attributes, it shall be an empty Attributes object.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
endElement(java.lang.String), Attributes

endElement

public void endElement(java.lang.String uri,
                       java.lang.String localName,
                       java.lang.String qName)
                throws org.xml.sax.SAXException
Receive notification of the end of an element.

The SAX parser will invoke this method at the end of every element in the XML document; there will be a corresponding startElement event for every endElement event (even when the element is empty).

For information on the names, see startElement.

Specified by:
endElement in interface org.xml.sax.ContentHandler
Parameters:
uri - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.
localName - The local name (without prefix), or the empty string if Namespace processing is not being performed.
qName - The qualified XML 1.0 name (with prefix), or the empty string if qualified names are not available.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

characters

public void characters(char[] ch,
                       int start,
                       int length)
                throws org.xml.sax.SAXException
Receive notification of character data.

The Parser will call this method to report each chunk of character data. SAX parsers may return all contiguous character data in a single chunk, or they may split it into several chunks; however, all of the characters in any single event must come from the same external entity so that the Locator provides useful information.

The application must not attempt to read from the array outside of the specified range.

Individual characters may consist of more than one Java char value. There are two important cases where this happens, because characters can't be represented in just sixteen bits. In one case, characters are represented in a Surrogate Pair, using two special Unicode values. Such characters are in the so-called "Astral Planes", with a code point above U+FFFF. A second case involves composite characters, such as a base character combining with one or more accent characters.

Your code should not assume that algorithms using char-at-a-time idioms will be working in character units; in some cases they will split characters. This is relevant wherever XML permits arbitrary characters, such as attribute values, processing instruction data, and comments as well as in data reported from this method. It's also generally relevant whenever Java code manipulates internationalized text; the issue isn't unique to XML.

Note that some parsers will report whitespace in element content using the ignorableWhitespace method rather than this one (validating parsers must do so).

Specified by:
characters in interface org.xml.sax.ContentHandler
Parameters:
ch - The characters from the XML document.
start - The start position in the array.
length - The number of characters to read from the array.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
ignorableWhitespace(char[], int, int), Locator

ignorableWhitespace

public void ignorableWhitespace(char[] ch,
                                int start,
                                int length)
                         throws org.xml.sax.SAXException
Receive notification of ignorable whitespace in element content.

Validating Parsers must use this method to report each chunk of whitespace in element content (see the W3C XML 1.0 recommendation, section 2.10): non-validating parsers may also use this method if they are capable of parsing and using content models.

SAX parsers may return all contiguous whitespace in a single chunk, or they may split it into several chunks; however, all of the characters in any single event must come from the same external entity, so that the Locator provides useful information.

The application must not attempt to read from the array outside of the specified range.

Specified by:
ignorableWhitespace in interface org.xml.sax.ContentHandler
Parameters:
ch - The characters from the XML document.
start - The start position in the array.
length - The number of characters to read from the array.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
characters(char[], int, int)

processingInstruction

public void processingInstruction(java.lang.String target,
                                  java.lang.String data)
                           throws org.xml.sax.SAXException
Receive notification of a processing instruction.

The Parser will invoke this method once for each processing instruction found: note that processing instructions may occur before or after the main document element.

A SAX parser must never report an XML declaration (XML 1.0, section 2.8) or a text declaration (XML 1.0, section 4.3.1) using this method.

Like characters(), processing instruction data may have characters that need more than one char value.

Specified by:
processingInstruction in interface org.xml.sax.ContentHandler
Parameters:
target - The processing instruction target.
data - The processing instruction data, or null if none was supplied. The data does not include any whitespace separating it from the target.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

skippedEntity

public void skippedEntity(java.lang.String name)
                   throws org.xml.sax.SAXException
Receive notification of a skipped entity. This is not called for entity references within markup constructs such as element start tags or markup declarations. (The XML recommendation requires reporting skipped external entities. SAX also reports internal entity expansion/non-expansion, except within markup constructs.)

The Parser will invoke this method each time the entity is skipped. Non-validating processors may skip entities if they have not seen the declarations (because, for example, the entity was declared in an external DTD subset). All processors may skip external entities, depending on the values of the http://xml.org/sax/features/external-general-entities and the http://xml.org/sax/features/external-parameter-entities properties.

Specified by:
skippedEntity in interface org.xml.sax.ContentHandler
Parameters:
name - The name of the skipped entity. If it is a parameter entity, the name will begin with '%', and if it is the external DTD subset, it will be the string "[dtd]".
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

startDTD

public void startDTD(java.lang.String name,
                     java.lang.String publicId,
                     java.lang.String systemId)
              throws org.xml.sax.SAXException
Report the start of DTD declarations, if any.

This method is intended to report the beginning of the DOCTYPE declaration; if the document has no DOCTYPE declaration, this method will not be invoked.

All declarations reported through DTDHandler or DeclHandler events must appear between the startDTD and endDTD events. Declarations are assumed to belong to the internal DTD subset unless they appear between startEntity and endEntity events. Comments and processing instructions from the DTD should also be reported between the startDTD and endDTD events, in their original order of (logical) occurrence; they are not required to appear in their correct locations relative to DTDHandler or DeclHandler events, however.

Note that the start/endDTD events will appear within the start/endDocument events from ContentHandler and before the first startElement event.

Specified by:
startDTD in interface org.xml.sax.ext.LexicalHandler
Parameters:
name - The document type name.
publicId - The declared public identifier for the external DTD subset, or null if none was declared.
systemId - The declared system identifier for the external DTD subset, or null if none was declared. (Note that this is not resolved against the document base URI.)
Throws:
org.xml.sax.SAXException - The application may raise an exception.
See Also:
endDTD(), startEntity(java.lang.String)

endDTD

public void endDTD()
            throws org.xml.sax.SAXException
Report the end of DTD declarations.

This method is intended to report the end of the DOCTYPE declaration; if the document has no DOCTYPE declaration, this method will not be invoked.

Specified by:
endDTD in interface org.xml.sax.ext.LexicalHandler
Throws:
org.xml.sax.SAXException - The application may raise an exception.
See Also:
startDTD(java.lang.String, java.lang.String, java.lang.String)

startEntity

public void startEntity(java.lang.String name)
                 throws org.xml.sax.SAXException
Report the beginning of some internal and external XML entities.

The reporting of parameter entities (including the external DTD subset) is optional, and SAX2 drivers that report LexicalHandler events may not implement it; you can use the http://xml.org/sax/features/lexical-handler/parameter-entities feature to query or control the reporting of parameter entities.

General entities are reported with their regular names, parameter entities have '%' prepended to their names, and the external DTD subset has the pseudo-entity name "[dtd]".

When a SAX2 driver is providing these events, all other events must be properly nested within start/end entity events. There is no additional requirement that events from DeclHandler or DTDHandler be properly ordered.

Note that skipped entities will be reported through the skippedEntity event, which is part of the ContentHandler interface.

Because of the streaming event model that SAX uses, some entity boundaries cannot be reported under any circumstances:

These will be silently expanded, with no indication of where the original entity boundaries were.

Note also that the boundaries of character references (which are not really entities anyway) are not reported.

All start/endEntity events must be properly nested.

Specified by:
startEntity in interface org.xml.sax.ext.LexicalHandler
Parameters:
name - The name of the entity. If it is a parameter entity, the name will begin with '%', and if it is the external DTD subset, it will be "[dtd]".
Throws:
org.xml.sax.SAXException - The application may raise an exception.
See Also:
endEntity(java.lang.String), DeclHandler.internalEntityDecl(java.lang.String, java.lang.String), DeclHandler.externalEntityDecl(java.lang.String, java.lang.String, java.lang.String)

endEntity

public void endEntity(java.lang.String name)
               throws org.xml.sax.SAXException
Report the end of an entity.

Specified by:
endEntity in interface org.xml.sax.ext.LexicalHandler
Parameters:
name - The name of the entity that is ending.
Throws:
org.xml.sax.SAXException - The application may raise an exception.
See Also:
startEntity(java.lang.String)

startCDATA

public void startCDATA()
                throws org.xml.sax.SAXException
Report the start of a CDATA section.

The contents of the CDATA section will be reported through the regular characters event; this event is intended only to report the boundary.

Specified by:
startCDATA in interface org.xml.sax.ext.LexicalHandler
Throws:
org.xml.sax.SAXException - The application may raise an exception.
See Also:
endCDATA()

endCDATA

public void endCDATA()
              throws org.xml.sax.SAXException
Report the end of a CDATA section.

Specified by:
endCDATA in interface org.xml.sax.ext.LexicalHandler
Throws:
org.xml.sax.SAXException - The application may raise an exception.
See Also:
startCDATA()

comment

public void comment(char[] ch,
                    int start,
                    int length)
             throws org.xml.sax.SAXException
Report an XML comment anywhere in the document.

This callback will be used for comments inside or outside the document element, including comments in the external DTD subset (if read). Comments in the DTD must be properly nested inside start/endDTD and start/endEntity events (if used).

Specified by:
comment in interface org.xml.sax.ext.LexicalHandler
Parameters:
ch - An array holding the characters in the comment.
start - The starting position in the array.
length - The number of characters to use from the array.
Throws:
org.xml.sax.SAXException - The application may raise an exception.

objectData

public void objectData(java.lang.Object object)
                throws org.xml.sax.SAXException
Pass data through the pipline. By default, this call is ignored. Subclasses are invited to use this as a way for children tags to pass data to their parent.

Parameters:
object - the data to pass
Throws:
org.xml.sax.SAXException - The application may raise an exception.

getContentHandler

public org.xml.sax.ContentHandler getContentHandler()
Returns:
the SAX ContentHandler to use to pipe SAX events into

setContentHandler

public void setContentHandler(org.xml.sax.ContentHandler contentHandler)
Sets the SAX ContentHandler to pipe SAX events into

Parameters:
contentHandler - is the new ContentHandler to use. This value cannot be null.

getLexicalHandler

public org.xml.sax.ext.LexicalHandler getLexicalHandler()
Returns:
the SAX LexicalHandler to use to pipe SAX events into

setLexicalHandler

public void setLexicalHandler(org.xml.sax.ext.LexicalHandler lexicalHandler)
Sets the SAX LexicalHandler to pipe SAX events into

Parameters:
lexicalHandler - is the new LexicalHandler to use. This value can be null.

createXMLOutput

protected static XMLOutput createXMLOutput(org.dom4j.io.XMLWriter xmlWriter)
Factory method to create a new XMLOutput from an XMLWriter



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