com.saxonica.stream
Class StreamingDespatcher

java.lang.Object
  com.saxonica.stream.StreamingDespatcher

All Implemented Interfaces:

Result, Receiver

public class StreamingDespatcher
extends Object
implements Receiver

This class receives events from streamed processing of an input file, and fires off template rules in streaming mode to process the nodes as they are read.

Field Summary

Fields inherited from interface javax.xml.transform.Result

PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING

Constructor Summary

StreamingDespatcher(Mode mode, StartTagBuffer buffer, XPathContext matchContext)

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) Notify character data.
void	close() Notify the end of the event stream
void	comment(CharSequence content, int locationId, int properties) Notify a comment.
void	endDocument() Notify the end of a document node
void	endElement() Notify the end of an element.
PipelineConfiguration	getPipelineConfiguration() Get the pipeline configuration
String	getSystemId() Get the system identifier that was set with setSystemId.
void	namespace(int namespaceCode, int properties) Notify a namespace.
void	open() Notify the start of the event stream
void	processingInstruction(String name, CharSequence data, int locationId, int properties) Output a processing instruction
void	setPipelineConfiguration(PipelineConfiguration pipe) Set the pipeline configuration
void	setSystemId(String systemId) Set the System ID of the tree represented by this event stream
void	setUnparsedEntity(String name, String systemID, String publicID) Notify an unparsed entity URI.
void	startContent() Notify the start of the content, that is, the completion of all attributes and namespaces.
void	startDocument(int properties) Notify the start of a document node
void	startElement(int nameCode, int typeCode, int locationId, int properties) Notify the start of an element
boolean	usesTypeAnnotations() Ask whether this Receiver (or the downstream pipeline) makes any use of the type annotations supplied on element and attribute events

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamingDespatcher

public StreamingDespatcher(Mode mode,
                           StartTagBuffer buffer,
                           XPathContext matchContext)

Method Detail

setPipelineConfiguration

public void setPipelineConfiguration(PipelineConfiguration pipe)

Set the pipeline configuration

Specified by:

setPipelineConfiguration in interface Receiver

Parameters:

pipe - the pipeline configuration

getPipelineConfiguration

public PipelineConfiguration getPipelineConfiguration()

Get the pipeline configuration

Specified by:

getPipelineConfiguration in interface Receiver

Returns:

the pipeline configuration

setSystemId

public void setSystemId(String systemId)

Set the System ID of the tree represented by this event stream

Specified by:

setSystemId in interface Result

Specified by:

setSystemId in interface Receiver

Parameters:

systemId - the system ID (which is used as the base URI of the nodes if there is no xml:base attribute)

open

public void open()
          throws XPathException

Notify the start of the event stream

Specified by:

open in interface Receiver

Throws:

XPathException

setUnparsedEntity

public void setUnparsedEntity(String name,
                              String systemID,
                              String publicID)
                       throws XPathException

Notify an unparsed entity URI.

Specified by:

setUnparsedEntity in interface Receiver

Parameters:

name - The name of the unparsed entity

systemID - The system identifier of the unparsed entity

publicID - The public identifier of the unparsed entity

Throws:

XPathException

getSystemId

public String getSystemId()

Get the system identifier that was set with setSystemId.

Specified by:

getSystemId in interface Result

Returns:

The system identifier that was set with setSystemId, or null if setSystemId was not called.

startDocument

public void startDocument(int properties)
                   throws XPathException

Notify the start of a document node

Specified by:

startDocument in interface Receiver

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

Specified by:

endDocument in interface Receiver

Throws:

XPathException

startElement

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

Notify the start of an element

Specified by:

startElement in interface Receiver

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

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.

Specified by:

namespace in interface Receiver

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

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

Specified by:

attribute in interface Receiver

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:

IllegalStateException: - attempt to output an attribute when there is no open element start tag

XPathException

startContent

public void startContent()
                  throws XPathException

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.

Specified by:

startContent in interface Receiver

Throws:

XPathException

endElement

public void endElement()
                throws XPathException

Notify the end of an element. The receiver must maintain a stack if it needs to know which element is ending.

Specified by:

endElement in interface Receiver

Throws:

XPathException

characters

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

Notify character data. Note that some receivers may require the character data to be sent in a single event, but in general this is not a requirement.

Specified by:

characters in interface Receiver

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

processingInstruction

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

Output a processing instruction

Specified by:

processingInstruction in interface Receiver

Parameters:

name - 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:

IllegalArgumentException: - the content is invalid for an XML processing instruction

XPathException

comment

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

Notify a comment. Comments are only notified if they are outside the DTD.

Specified by:

comment in interface Receiver

Parameters:

content - 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:

IllegalArgumentException: - the content is invalid for an XML comment

XPathException

close

public void close()
           throws XPathException

Notify the end of the event stream

Specified by:

close in interface Receiver

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

Specified by:

usesTypeAnnotations in interface Receiver

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