net.sf.saxon.event
Class ProxyReceiver

java.lang.Object
  extended by net.sf.saxon.event.SequenceReceiver
      extended by net.sf.saxon.event.ProxyReceiver
All Implemented Interfaces:
Result, Receiver
Direct Known Subclasses:
CDATAFilter, CharacterMapExpander, CommentStripper, DocumentValidator, EvaluationNuisance, HTMLIndenter, HTMLURIEscaper, IdValidator, IgnorableWhitespaceStripper, ImplicitResultChecker, MetaTagAdjuster, NamePoolConverter, NamespaceReducer, PIGrabber, Projector, StartTagBuffer, Stripper, TracingFilter, TransformerReceiver, TypeCheckingFilter, UncommittedSerializer, UnicodeNormalizer, UseWhenFilter, ValidatingFilter, VersionControlFilter, WatchManager, XML10ContentChecker, XMLIndenter

public abstract class ProxyReceiver
extends SequenceReceiver

A ProxyReceiver is an Receiver that filters data before passing it to another underlying Receiver.


Field Summary
protected  Receiver 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
ProxyReceiver()
           
 
Method Summary
 void append(Item item, int locationId, int copyNamespaces)
          Append an arbitrary item (node or atomic value) to the output
 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 output.
 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
 Configuration getConfiguration()
          Get the Saxon Configuration
 LocationProvider getDocumentLocator()
          Get the Document Locator
 NamePool getNamePool()
          Get the namepool for this configuration
 Receiver getUnderlyingReceiver()
          Get the underlying Receiver (that is, the next one in the pipeline)
 void namespace(int namespaceCode, int properties)
          Notify a namespace.
 void open()
          Start of event stream
 void processingInstruction(String target, CharSequence data, int locationId, int properties)
          Processing Instruction
 void setPipelineConfiguration(PipelineConfiguration pipe)
          Set the pipeline configuration
 void setSystemId(String systemId)
          Set the system ID
 void setUnderlyingReceiver(Receiver receiver)
          Set the underlying receiver.
 void setUnparsedEntity(String name, String uri, String publicId)
          Set the URI for an unparsed entity in the document.
 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)
          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 net.sf.saxon.event.SequenceReceiver
getPipelineConfiguration, getSystemId
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

nextReceiver

protected Receiver nextReceiver
Constructor Detail

ProxyReceiver

public ProxyReceiver()
Method Detail

setSystemId

public void setSystemId(String systemId)
Description copied from class: SequenceReceiver
Set the system ID

Specified by:
setSystemId in interface Result
Specified by:
setSystemId in interface Receiver
Overrides:
setSystemId in class SequenceReceiver
Parameters:
systemId - the URI used to identify the tree being passed across this interface

setUnderlyingReceiver

public void setUnderlyingReceiver(Receiver receiver)
Set the underlying receiver. This call is mandatory before using the Receiver.

Parameters:
receiver - the underlying receiver, the one that is to receive events after processing by this filter.

getUnderlyingReceiver

public Receiver getUnderlyingReceiver()
Get the underlying Receiver (that is, the next one in the pipeline)


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 SequenceReceiver
Parameters:
pipe - the pipeline configuration

getConfiguration

public Configuration getConfiguration()
Description copied from class: SequenceReceiver
Get the Saxon Configuration

Overrides:
getConfiguration in class SequenceReceiver
Returns:
the Configuration

getNamePool

public NamePool getNamePool()
Get the namepool for this configuration

Overrides:
getNamePool in class SequenceReceiver
Returns:
the Name Pool that was supplied using the setConfiguration() method

open

public void open()
          throws XPathException
Start of event stream

Specified by:
open in interface Receiver
Overrides:
open in class SequenceReceiver
Throws:
XPathException

close

public void close()
           throws XPathException
End of output. Note that closing this receiver also closes the rest of the pipeline.

Throws:
XPathException

startDocument

public void startDocument(int properties)
                   throws XPathException
Start of a document node.

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

startElement

public void startElement(int nameCode,
                         int typeCode,
                         int locationId,
                         int properties)
                  throws XPathException
Notify the start of an element

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.
properties - properties of the element node
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.
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; however, duplicates may be reported. 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:
IllegalStateException: - attempt to output a namespace when there is no open element start tag
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.

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
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
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.
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.

Throws:
XPathException

endElement

public void endElement()
                throws XPathException
End of 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

processingInstruction

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

comment

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

setUnparsedEntity

public void setUnparsedEntity(String name,
                              String uri,
                              String publicId)
                       throws XPathException
Set the URI for an unparsed entity in the document.

Specified by:
setUnparsedEntity in interface Receiver
Overrides:
setUnparsedEntity in class SequenceReceiver
Parameters:
name - The name of the unparsed entity
uri - The system identifier of the unparsed entity
publicId - The public identifier of the unparsed entity
Throws:
XPathException

append

public void append(Item item,
                   int locationId,
                   int copyNamespaces)
            throws XPathException
Append an arbitrary item (node or atomic value) to the output

Specified by:
append in class SequenceReceiver
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 NodeInfo.ALL_NAMESPACES, NodeInfo.LOCAL_NAMESPACES, NodeInfo.NO_NAMESPACES
Throws:
XPathException

getDocumentLocator

public LocationProvider getDocumentLocator()
Get the Document Locator


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


Copyright (c) Saxonica Limited. All rights reserved.