com.saxonica.stream
Class Projector

java.lang.Object
  extended by net.sf.saxon.event.SequenceReceiver
      extended by net.sf.saxon.event.ProxyReceiver
          extended by com.saxonica.stream.Projector
All Implemented Interfaces:
Result, Receiver

public class Projector
extends ProxyReceiver

This class uses a PathMap to do document projection. It acts as a push filter, passing through only those events that are necessary to evaluate the expression that was used to generate the PathMap.


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
Projector(PathMap.PathMapRoot pathMapRoot, Receiver next)
          Create a document projector
 
Method Summary
 void attribute(NodeName nameCode, SimpleType typeCode, CharSequence value, int locationId, int properties)
          Notify an attribute.
 void characters(CharSequence chars, int locationId, int properties)
          Character data
 void comment(CharSequence chars, int locationId, int properties)
          Output a comment
 void endDocument()
          Notify the end of a document node
 void endElement()
          End of element
 void namespace(NamespaceBinding namespaceBinding, int properties)
          Notify a namespace.
 void outputStatistics(PrintStream out)
          Output statistics showing the effectiveness of filtering
 void processingInstruction(String target, CharSequence data, int locationId, int properties)
          Processing Instruction
 void setPipelineConfiguration(PipelineConfiguration pipe)
          Set the pipeline configuration
 void startElement(NodeName elemName, SchemaType typeCode, int locationId, int properties)
          Notify the start of an element
 
Methods inherited from class net.sf.saxon.event.ProxyReceiver
append, close, getNamePool, getUnderlyingReceiver, open, setSystemId, setUnderlyingReceiver, setUnparsedEntity, startContent, startDocument, usesTypeAnnotations
 
Methods inherited from class net.sf.saxon.event.SequenceReceiver
append, getConfiguration, getPipelineConfiguration, getSystemId
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Projector

public Projector(PathMap.PathMapRoot pathMapRoot,
                 Receiver next)
Create a document projector

Parameters:
pathMapRoot - defines the paths within the document that need to be retained
next - the next receiver in the pipeline
Method Detail

setPipelineConfiguration

public void setPipelineConfiguration(PipelineConfiguration pipe)
Description copied from interface: Receiver
Set the pipeline configuration

Specified by:
setPipelineConfiguration in interface Receiver
Overrides:
setPipelineConfiguration in class ProxyReceiver
Parameters:
pipe - the pipeline configuration

startElement

public void startElement(NodeName elemName,
                         SchemaType typeCode,
                         int locationId,
                         int properties)
                  throws XPathException
Description copied from class: ProxyReceiver
Notify the start of an element

Specified by:
startElement in interface Receiver
Overrides:
startElement in class ProxyReceiver
Parameters:
elemName - integer code identifying the name of the element within the name pool.
typeCode - integer code identifying the element's type within the name pool.
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 - properties of the element node
Throws:
XPathException - if an error occurs

attribute

public void attribute(NodeName nameCode,
                      SimpleType typeCode,
                      CharSequence value,
                      int locationId,
                      int properties)
               throws XPathException
Description copied from class: ProxyReceiver
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
Overrides:
attribute in class ProxyReceiver
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
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 - if an error occurs

namespace

public void namespace(NamespaceBinding namespaceBinding,
                      int properties)
               throws XPathException
Description copied from class: ProxyReceiver
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; however, duplicates may be reported. A namespace must not conflict with any namespaces already used for element or attribute names.

Specified by:
namespace in interface Receiver
Overrides:
namespace in class ProxyReceiver
Parameters:
namespaceBinding - the prefix/uri pair representing the namespace binding
properties - any special properties to be passed on this call
Throws:
XPathException - if an error occurs

characters

public void characters(CharSequence chars,
                       int locationId,
                       int properties)
                throws XPathException
Description copied from class: ProxyReceiver
Character data

Specified by:
characters in interface Receiver
Overrides:
characters in class ProxyReceiver
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 - if an error occurs

comment

public void comment(CharSequence chars,
                    int locationId,
                    int properties)
             throws XPathException
Description copied from class: ProxyReceiver
Output a comment

Specified by:
comment in interface Receiver
Overrides:
comment in class ProxyReceiver
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.
Throws:
XPathException - if an error occurs

processingInstruction

public void processingInstruction(String target,
                                  CharSequence data,
                                  int locationId,
                                  int properties)
                           throws XPathException
Description copied from class: ProxyReceiver
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 - 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.
Throws:
XPathException - if an error occurs

endElement

public void endElement()
                throws XPathException
Description copied from class: ProxyReceiver
End of element

Specified by:
endElement in interface Receiver
Overrides:
endElement in class ProxyReceiver
Throws:
XPathException - if an error occurs

endDocument

public void endDocument()
                 throws XPathException
Description copied from class: ProxyReceiver
Notify the end of a document node

Specified by:
endDocument in interface Receiver
Overrides:
endDocument in class ProxyReceiver
Throws:
XPathException - if an error occurs

outputStatistics

public void outputStatistics(PrintStream out)
Output statistics showing the effectiveness of filtering

Parameters:
out - the output destination


Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.