Package net.sf.saxon.event

Class EventMonitor

java.lang.Object

net.sf.saxon.event.Outputter

net.sf.saxon.event.EventMonitor

All Implemented Interfaces:

javax.xml.transform.Result, Receiver

public class EventMonitor
extends Outputter

An EventMonitor is a filter that passes all events down the pipeline unchanged, keeping a note of whether any data has passed through the filter. At any stage it is possible to ask whether any data has been written.

Since:

9.9

Field Summary

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

pipelineConfiguration, systemId

Fields inherited from interface javax.xml.transform.Result

PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING

Constructor Summary

Constructors

Constructor	Description
EventMonitor(Outputter next)

Method Summary

Modifier and Type	Method	Description
void	append(Item item, Location location, int properties)	Append an arbitrary item (node, atomic value, or function) to the output.
void	attribute(NodeName name, SimpleType type, java.lang.String value, Location location, int properties)	Notify an attribute.
void	characters(UnicodeString chars, Location location, int properties)	Notify character data.
void	comment(UnicodeString content, Location location, int properties)	Notify a comment.
void	endDocument()	Notify the end of a document node
void	endElement()	Notify the end of an element.
boolean	hasBeenWrittenTo()
void	namespace(java.lang.String prefix, NamespaceUri uri, int properties)	Notify a namespace binding.
void	processingInstruction(java.lang.String name, UnicodeString data, Location location, int properties)	Output a processing instruction
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(NodeName elemName, SchemaType type, Location location, int properties)	Notify the start of an element.

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

append, close, getConfiguration, getPipelineConfiguration, getStringReceiver, getSystemId, namespaces, open, setPipelineConfiguration, setSystemId, setUnparsedEntity, startElement, usesTypeAnnotations

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.saxon.event.Receiver

handlesAppend

Constructor Detail

EventMonitor

public EventMonitor(Outputter next)

Method Detail

startDocument

public void startDocument(int properties)
                   throws XPathException

Description copied from class: Outputter

Notify the start of a document node

Specified by:

startDocument in interface Receiver

Specified by:

startDocument in class Outputter

Parameters:

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

Throws:

XPathException - if an error occurs

startElement

public void startElement(NodeName elemName,
                         SchemaType type,
                         Location location,
                         int properties)
                  throws XPathException

Description copied from class: Outputter

Notify the start of an element. This version of startElement() must be followed by calls on Outputter.attribute(NodeName, SimpleType, String, Location, int) and Outputter.namespace(String, NamespaceUri, int) to supply the attributes and namespaces; these calls may be terminated by a call on Outputter.startContent() but this is not mandatory.

Specified by:

startElement in class Outputter

Parameters:

elemName - the name of the element.

type - the type annotation of the element.

location - an object providing information about the module, line, and column where the node originated

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

Throws:

XPathException - if an error occurs

endElement

public void endElement()
                throws XPathException

Description copied from class: Outputter

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

Specified by:

endElement in interface Receiver

Specified by:

endElement in class Outputter

Throws:

XPathException - if an error occurs

attribute

public void attribute(NodeName name,
                      SimpleType type,
                      java.lang.String value,
                      Location location,
                      int properties)
               throws XPathException

Description copied from class: Outputter

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

Specified by:

attribute in class Outputter

Parameters:

name - The name of the attribute

type - The type annotation of the attribute

value - the string value of the attribute

location - provides information such as line number and system ID.

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 - if an error occurs

namespace

public void namespace(java.lang.String prefix,
                      NamespaceUri uri,
                      int properties)
               throws XPathException

Description copied from class: Outputter

Notify a namespace binding. This method is called at some point after startElement(). The semantics are similar to the xsl:namespace instruction in XSLT, or the namespace node constructor in XQuery. A namespace must not conflict with any namespaces already used for element or attribute names.

Specified by:

namespace in class Outputter

Parameters:

prefix - The namespace prefix; zero-length string for the default namespace

uri - The namespace URI. In some cases a zero-length string may be used to indicate a namespace undeclaration.

properties - The REJECT_DUPLICATES property: if 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:

Throws:

XPathException - if an error occurs

startContent

public void startContent()
                  throws XPathException

Description copied from class: Outputter

Notify the start of the content, that is, the completion of all attributes and namespaces. Note that the initial Outputter 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.

Overrides:

startContent in class Outputter

Throws:

XPathException - if an error occurs

characters

public void characters(UnicodeString chars,
                       Location location,
                       int properties)
                throws XPathException

Description copied from class: Outputter

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

Specified by:

characters in class Outputter

Parameters:

chars - The characters

location - provides information such as line number and system ID.

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 - if an error occurs

processingInstruction

public void processingInstruction(java.lang.String name,
                                  UnicodeString data,
                                  Location location,
                                  int properties)
                           throws XPathException

Description copied from class: Outputter

Output a processing instruction

Specified by:

processingInstruction in interface Receiver

Specified by:

processingInstruction in class Outputter

Parameters:

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

data - The data portion of the processing instruction

location - provides information such as line number and system ID.

properties - Additional information about the PI.

Throws:

XPathException - if an error occurs

comment

public void comment(UnicodeString content,
                    Location location,
                    int properties)
             throws XPathException

Description copied from class: Outputter

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

Specified by:

comment in interface Receiver

Specified by:

comment in class Outputter

Parameters:

content - The content of the comment

location - provides information such as line number and system ID.

properties - Additional information about the comment.

Throws:

XPathException - if an error occurs

append

public void append(Item item,
                   Location location,
                   int properties)
            throws XPathException

Description copied from class: Outputter

Append an arbitrary item (node, atomic value, or function) to the output. The default implementation throws UnsupportedOperationException.

Specified by:

append in interface Receiver

Overrides:

append in class Outputter

Parameters:

item - the item to be appended

location - the location of the calling instruction, for diagnostics

properties - if the item is an element node, this indicates whether its namespaces need to be copied. Values are ReceiverOption.ALL_NAMESPACES; the default (0) means

Throws:

XPathException - if an error occurs

endDocument

public void endDocument()
                 throws XPathException

Description copied from class: Outputter

Notify the end of a document node

Specified by:

endDocument in interface Receiver

Specified by:

endDocument in class Outputter

Throws:

XPathException - if an error occurs

hasBeenWrittenTo

public boolean hasBeenWrittenTo()