net.sf.saxon.trace

Class CountingFilter

java.lang.Object

net.sf.saxon.event.SequenceReceiver

net.sf.saxon.event.ProxyReceiver

net.sf.saxon.trace.CountingFilter

All Implemented Interfaces:

javax.xml.transform.Result, Receiver

public class CountingFilter
extends ProxyReceiver

A filter that can be inserted into a Receiver pipeline to count the events that pass through. This class is not normally used in Saxon, but is available for diagnostics when needed. Note that the counters are only maintained if Instrumentation.ACTIVE is set to true. The counters can be displayed by calling Instrumentation.report().

Field Summary

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

nextReceiver

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

pipelineConfiguration, previousAtomic, systemId

Fields inherited from interface javax.xml.transform.Result

PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING

Constructor Summary

Constructors

Constructor and Description
CountingFilter(Receiver nextReceiver) Create a TracingFilter and allocate a unique Id.
CountingFilter(Receiver nextReceiver, java.io.PrintStream diagnosticOutput) Create a TracingFilter, allocate a unique Id, and supply the destination for diagnostic trace messages

Method Summary

Modifier and Type	Method and Description
void	append(Item item, Location locationId, int copyNamespaces) Append an arbitrary item (node or atomic value) to the output
void	characters(java.lang.CharSequence chars, Location locationId, int properties) Character data
void	close() End of document
void	comment(java.lang.CharSequence chars, Location locationId, int properties) Output a comment
void	endDocument() Notify the end of a document node
void	endElement() End of element
int	getId() Get the unique id that was allocated to this TracingFilter
void	open() Start of event stream
void	processingInstruction(java.lang.String target, java.lang.CharSequence data, Location locationId, int properties) Processing Instruction
void	startDocument(int properties) Start of a document node.
void	startElement(NodeName elemName, SchemaType type, AttributeMap attributes, NamespaceMap namespaces, Location location, int properties) Notify the start of an element

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

getNamePool, getNextReceiver, setPipelineConfiguration, setSystemId, setUnderlyingReceiver, setUnparsedEntity, usesTypeAnnotations

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

append, decompose, flatten, getConfiguration, getErrorCodeForDecomposingFunctionItems, getPipelineConfiguration, getSystemId, handlesAppend

Methods inherited from class java.lang.Object

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

Constructor Detail

CountingFilter

public CountingFilter(Receiver nextReceiver)

Create a TracingFilter and allocate a unique Id.

Parameters:

nextReceiver - the underlying receiver to which the events will be sent

CountingFilter

public CountingFilter(Receiver nextReceiver,
                      java.io.PrintStream diagnosticOutput)

Create a TracingFilter, allocate a unique Id, and supply the destination for diagnostic trace messages

Parameters:

nextReceiver - the underlying receiver to which the events will be sent

diagnosticOutput - the destination for diagnostic trace messages

Method Detail

getId

public int getId()

Get the unique id that was allocated to this TracingFilter

Returns:

the unique id (which is included in all diagnostic messages)

append

public void append(Item item,
                   Location locationId,
                   int copyNamespaces)
            throws XPathException

Append an arbitrary item (node or atomic value) to the output

Specified by:

append in interface Receiver

Overrides:

append in class ProxyReceiver

Parameters:

item - the item to be appended

locationId - the location of the calling instruction, for diagnostics

copyNamespaces - 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

characters

public void characters(java.lang.CharSequence chars,
                       Location locationId,
                       int properties)
                throws XPathException

Character data

Specified by:

characters in interface Receiver

Overrides:

characters in class ProxyReceiver

Parameters:

chars - The characters

locationId - 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

close

public void close()
           throws XPathException

End of document

Specified by:

close in interface Receiver

Overrides:

close in class ProxyReceiver

Throws:

XPathException - if an error occurs

comment

public void comment(java.lang.CharSequence chars,
                    Location locationId,
                    int properties)
             throws XPathException

Output a comment

Specified by:

comment in interface Receiver

Overrides:

comment in class ProxyReceiver

Parameters:

chars - The content of the comment

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

properties - Additional information about the comment.

Throws:

XPathException - if an error occurs

endDocument

public void endDocument()
                 throws XPathException

Notify the end of a document node

Specified by:

endDocument in interface Receiver

Overrides:

endDocument in class ProxyReceiver

Throws:

XPathException - if an error occurs

endElement

public void endElement()
                throws XPathException

End of element

Specified by:

endElement in interface Receiver

Overrides:

endElement in class ProxyReceiver

Throws:

XPathException - if an error occurs

open

public void open()
          throws XPathException

Start of event stream

Specified by:

open in interface Receiver

Overrides:

open in class ProxyReceiver

Throws:

XPathException - if an error occurs

processingInstruction

public void processingInstruction(java.lang.String target,
                                  java.lang.CharSequence data,
                                  Location locationId,
                                  int properties)
                           throws XPathException

Processing Instruction

Specified by:

processingInstruction in interface Receiver

Overrides:

processingInstruction in class ProxyReceiver

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 - provides information such as line number and system ID.

properties - Additional information about the PI.

Throws:

XPathException - if an error occurs

startDocument

public void startDocument(int properties)
                   throws XPathException

Start of a document node.

Specified by:

startDocument in interface Receiver

Overrides:

startDocument in class ProxyReceiver

Parameters:

properties -

Throws:

XPathException - if an error occurs

startElement

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

Notify the start of an element

Specified by:

startElement in interface Receiver

Overrides:

startElement in class ProxyReceiver

Parameters:

elemName - the name of the element.

type - the type annotation of the element.

attributes - the attributes of this element

namespaces - the in-scope namespaces of this element: generally this is all the in-scope namespaces, without relying on inheriting namespaces from parent elements

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