net.sf.saxon.event
Class XMLEmitter

java.lang.Object
  net.sf.saxon.event.Emitter
      net.sf.saxon.event.XMLEmitter

All Implemented Interfaces:

Result, Receiver

Direct Known Subclasses:

HTMLEmitter, MessageEmitter, MessageWarner, TEXTEmitter, XHTMLEmitter, XQueryEmitter

public class XMLEmitter
extends Emitter

XMLEmitter is an Emitter that generates XML output to a specified destination.

Field Summary

protected boolean	declarationIsWritten
protected int	elementCode
protected Stack	elementStack
protected boolean	openStartTag
protected boolean	preferHex
protected boolean	started
protected boolean	startedElement
protected boolean	undeclareNamespaces

Fields inherited from class net.sf.saxon.event.Emitter

allCharactersEncodable, characterSet, namePool, outputProperties, outputStream, pipelineConfig, streamResult, systemId, writer

Fields inherited from interface javax.xml.transform.Result

PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING

Constructor Summary

XMLEmitter()

Method Summary

void	attribute(int nameCode, int typeCode, CharSequence value, int locationId, int properties) Notify an attribute.
void	characters(CharSequence chars, int locationId, int properties) Character data.
void	close() End of the document.
void	closeStartTag() Mark the end of the start tag
void	comment(CharSequence chars, int locationId, int properties) Handle a comment.
protected String	emptyElementTagCloser(String displayName, int nameCode) Close an empty element tag.
void	endDocument() Notify the end of a document node
void	endElement() End of an element.
protected String	getCachedName(int nameCode) Get a name from the local name cache
void	namespace(int namespaceCode, int properties) Notify a namespace.
void	open() Start of the event stream.
protected void	openDocument() Do the real work of starting the document.
protected void	outputCharacterReference(int charval)
void	processingInstruction(String target, CharSequence data, int locationId, int properties) Handle a processing instruction.
protected void	putCachedName(int nameCode, String displayName) Add a name to the local name cache
void	startContent() Notify the start of the content, that is, the completion of all attributes and namespaces.
void	startDocument(int properties) Start of a document node.
void	startElement(int nameCode, int typeCode, int locationId, int properties) Start of an element.
protected int	testCharacters(CharSequence chars) Test that all characters in a name (for example) are supported in the target encoding.
boolean	usesTypeAnnotations() Ask whether this Receiver (or the downstream pipeline) makes any use of the type annotations supplied on element and attribute events
protected void	writeAttribute(int elCode, String attname, CharSequence value, int properties) Write attribute name=value pair.
void	writeCharSequence(CharSequence s) Write a CharSequence (without any escaping of special characters): various implementations
void	writeDeclaration() Output the XML declaration
protected void	writeDocType(String type, String systemId, String publicId) Output the document type declaration
protected void	writeEscape(CharSequence chars, boolean inAttribute) Write contents of array to current writer, after escaping special characters.

Methods inherited from class net.sf.saxon.event.Emitter

getConfiguration, getOutputProperties, getOutputStream, getPipelineConfiguration, getSystemId, getWriter, makeWriter, setOutputProperties, setOutputStream, setPipelineConfiguration, setStreamResult, setSystemId, setUnparsedEntity, setWriter, usesWriter

Methods inherited from class java.lang.Object

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

Field Detail

started

protected boolean started

startedElement

protected boolean startedElement

openStartTag

protected boolean openStartTag

declarationIsWritten

protected boolean declarationIsWritten

elementCode

protected int elementCode

preferHex

protected boolean preferHex

undeclareNamespaces

protected boolean undeclareNamespaces

elementStack

protected Stack elementStack

Constructor Detail

XMLEmitter

public XMLEmitter()

Method Detail

open

public void open()
          throws XPathException

Start of the event stream. Nothing is done at this stage: the opening of the output file is deferred until some content is written to it.

Throws:

XPathException

startDocument

public void startDocument(int properties)
                   throws XPathException

Start of a document node. Nothing is done at this stage: the opening of the output file is deferred until some content is written to it.

Parameters:

properties - bit-significant integer indicating properties of the document node. The definitions of the bits are in class ReceiverOptions

Throws:

XPathException

endDocument

public void endDocument()
                 throws XPathException

Notify the end of a document node

Throws:

XPathException

openDocument

protected void openDocument()
                     throws XPathException

Do the real work of starting the document. This happens when the first content is written.

Throws:

XPathException

writeDeclaration

public void writeDeclaration()
                      throws XPathException

Output the XML declaration

Throws:

XPathException

writeDocType

protected void writeDocType(String type,
                            String systemId,
                            String publicId)
                     throws XPathException

Output the document type declaration

Parameters:

type - The element name

systemId - The DOCTYP system identifier

publicId - The DOCTYPE public identifier

Throws:

XPathException

close

public void close()
           throws XPathException

End of the document.

Throws:

XPathException

startElement

public void startElement(int nameCode,
                         int typeCode,
                         int locationId,
                         int properties)
                  throws XPathException

Start of an element. Output the start tag, escaping special characters.

Parameters:

nameCode - integer code identifying the name of the element within the name pool.

typeCode - integer code identifying the element's type within the name pool. The value -1 indicates the default type, xs:untyped.

locationId - an integer which can be interpreted using a LocationProvider to return information such as line number and system ID. If no location information is available, the value zero is supplied.

properties - bit-significant properties of the element node. If there are no revelant properties, zero is supplied. The definitions of the bits are in class ReceiverOptions

Throws:

XPathException

namespace

public void namespace(int namespaceCode,
                      int properties)
               throws XPathException

Description copied from interface: Receiver

Notify a namespace. Namespaces are notified after the startElement event, and before any children for the element. The namespaces that are reported are only required to include those that are different from the parent element. The events represent namespace declarations and undeclarations rather than in-scope namespace nodes: an undeclaration is represented by a namespace code of zero. If the sequence of namespace events contains two A namespace must not conflict with any namespaces already used for element or attribute names.

Parameters:

namespaceCode - an integer: the top half is a prefix code, the bottom half a URI code. These may be translated into an actual prefix and URI using the name pool. A prefix code of zero represents the empty prefix (that is, the default namespace). A URI code of zero represents a URI of "", that is, a namespace undeclaration.

properties - The most important property is REJECT_DUPLICATES. If this property is set, the namespace declaration will be rejected if it conflicts with a previous declaration of the same prefix. If the property is not set, the namespace declaration will be ignored if it conflicts with a previous declaration. This reflects the fact that when copying a tree, namespaces for child elements are emitted before the namespaces of their parent element. Unfortunately this conflicts with the XSLT rule for complex content construction, where the recovery action in the event of conflicts is to take the namespace that comes last. XSLT therefore doesn't recover from this error: it sets the REJECT_DUPLICATES flag, and this is treated as a hard error.

Throws:

XPathException

attribute

public void attribute(int nameCode,
                      int typeCode,
                      CharSequence value,
                      int locationId,
                      int properties)
               throws XPathException

Description copied from interface: Receiver

Notify an attribute. Attributes are notified after the startElement event, and before any children. Namespaces and attributes may be intermingled.

Parameters:

nameCode - The name of the attribute, as held in the name pool

typeCode - The type of the attribute, as held in the name pool. The additional bit NodeInfo.IS_DTD_TYPE may be set to indicate a DTD-derived type.

value - the string value of the attribute

locationId - an integer which can be interpreted using a LocationProvider to return information such as line number and system ID. If no location information is available, the value zero is supplied.

properties - Bit significant value. The following bits are defined:

DISABLE_ESCAPING

Disable escaping for this attribute

NO_SPECIAL_CHARACTERS

Attribute value contains no special characters

Throws:

XPathException

startContent

public void startContent()
                  throws XPathException

Description copied from interface: Receiver

Notify the start of the content, that is, the completion of all attributes and namespaces. Note that the initial receiver of output from XSLT instructions will not receive this event, it has to detect it itself. Note that this event is reported for every element even if it has no attributes, no namespaces, and no content.

Throws:

XPathException

closeStartTag

public void closeStartTag()
                   throws XPathException

Mark the end of the start tag

Throws:

XPathException - if an IO exception occurs

emptyElementTagCloser

protected String emptyElementTagCloser(String displayName,
                                       int nameCode)

Close an empty element tag. (This is overridden in XHTMLEmitter).

Parameters:

displayName - the name of the empty element

nameCode - the fingerprint of the name of the empty element

Returns:

the string used to close an empty element tag.

writeAttribute

protected void writeAttribute(int elCode,
                              String attname,
                              CharSequence value,
                              int properties)
                       throws XPathException

Write attribute name=value pair.

Parameters:

elCode - The element name is not used in this version of the method, but is used in the HTML subclass.

attname - The attribute name, which has already been validated to ensure it can be written in this encoding

value - The value of the attribute

properties - Any special properties of the attribute

Throws:

XPathException

testCharacters

protected int testCharacters(CharSequence chars)
                      throws XPathException

Test that all characters in a name (for example) are supported in the target encoding.

Parameters:

chars - the characters to be tested

Returns:

zero if all the characters are available, or the value of the first offending character if not

Throws:

XPathException

endElement

public void endElement()
                throws XPathException

End of an element.

Throws:

XPathException

characters

public void characters(CharSequence chars,
                       int locationId,
                       int properties)
                throws XPathException

Character data.

Parameters:

chars - The characters

locationId - an integer which can be interpreted using a LocationProvider to return information such as line number and system ID. If no location information is available, the value zero is supplied.

properties - Bit significant value. The following bits are defined:

DISABLE_ESCAPING

Disable escaping for this text node

USE_CDATA

Output as a CDATA section

Throws:

XPathException

writeCharSequence

public void writeCharSequence(CharSequence s)
                       throws IOException

Write a CharSequence (without any escaping of special characters): various implementations

Parameters:

s - the character sequence to be written

Throws:

IOException

processingInstruction

public void processingInstruction(String target,
                                  CharSequence data,
                                  int locationId,
                                  int properties)
                           throws XPathException

Handle a processing instruction.

Parameters:

target - The PI name. This must be a legal name (it will not be checked).

data - The data portion of the processing instruction

locationId - an integer which can be interpreted using a LocationProvider to return information such as line number and system ID. If no location information is available, the value zero is supplied.

properties - Additional information about the PI. The following bits are defined:

CHECKED

Data is known to be legal (e.g. doesn't contain "?>")

Throws:

XPathException

writeEscape

protected void writeEscape(CharSequence chars,
                           boolean inAttribute)
                    throws IOException,
                           XPathException

Write contents of array to current writer, after escaping special characters. This method converts the XML special characters (such as < and &) into their predefined entities.

Parameters:

chars - The character sequence containing the string

inAttribute - Set to true if the text is in an attribute value

Throws:

IOException

XPathException

outputCharacterReference

protected void outputCharacterReference(int charval)
                                 throws IOException

Throws:

IOException

comment

public void comment(CharSequence chars,
                    int locationId,
                    int properties)
             throws XPathException

Handle a comment.

Parameters:

chars - The content of the comment

locationId - an integer which can be interpreted using a LocationProvider to return information such as line number and system ID. If no location information is available, the value zero is supplied.

properties - Additional information about the comment. The following bits are defined:

CHECKED

Comment is known to be legal (e.g. doesn't contain "--")

Throws:

XPathException

usesTypeAnnotations

public boolean usesTypeAnnotations()

Ask whether this Receiver (or the downstream pipeline) makes any use of the type annotations supplied on element and attribute events

Returns:

true if the Receiver makes any use of this information. If false, the caller may supply untyped nodes instead of supplying the type annotation

getCachedName

protected String getCachedName(int nameCode)

Get a name from the local name cache

Parameters:

nameCode - the integer name code

Returns:

a lexical QName if the name is in the cache; otherwise, null

putCachedName

protected void putCachedName(int nameCode,
                             String displayName)

Add a name to the local name cache

Parameters:

nameCode - the integer name code

displayName - the corresponding lexical QName