net.sf.saxon.event

Interface Receiver

public interface Receiver extends Result

Receiver: This interface represents a recipient of XML tree-walking (push) events. It is based on SAX2's ContentHandler, but adapted to handle additional events, and to use Saxon's name pool. Namespaces and Attributes are handled by separate events following the startElement event. Schema types can be defined for elements and attributes.

The Receiver interface is an important internal interface within Saxon, and provides a powerful mechanism for integrating Saxon with other applications. It has been designed with extensibility and stability in mind. However, it should be considered as an interface designed primarily for internal use, and not as a completely stable part of the public Saxon API.

Author: Michael H. Kay

Method Summary
voidattribute(int nameCode, int typeCode, CharSequence value, int locationId, int properties)
Notify an attribute.
voidcharacters(CharSequence chars, int locationId, int properties)
Notify character data.
voidclose()
Notify the end of the event stream
voidcomment(CharSequence content, int locationId, int properties)
Notify a comment.
voidendDocument()
Notify the end of a document node
voidendElement()
Notify the end of an element.
PipelineConfigurationgetPipelineConfiguration()
Get the pipeline configuration
voidnamespace(int namespaceCode, int properties)
Notify a namespace.
voidopen()
Notify the start of the event stream
voidprocessingInstruction(String name, CharSequence data, int locationId, int properties)
Output a processing instruction
voidsetPipelineConfiguration(PipelineConfiguration config)
Set the pipeline configuration
voidsetSystemId(String systemId)
Set the System ID of the destination tree
voidsetUnparsedEntity(String name, String systemID, String publicID)
Notify an unparsed entity URI.
voidstartContent()
Notify the start of the content, that is, the completion of all attributes and namespaces.
voidstartDocument(int properties)
Notify the start of a document node
voidstartElement(int nameCode, int typeCode, int locationId, int properties)
Notify the start of an element

Method Detail

attribute

public void attribute(int nameCode, int typeCode, CharSequence value, int locationId, int properties)
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. The additional bit NodeInfo.IS_DTD_TYPE may be set to indicate a DTD-derived type. locationId an integer which can be interpreted using a LocationMap 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

characters

public void characters(CharSequence chars, int locationId, int properties)
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.

Parameters: chars The characters locationId an integer which can be interpreted using a LocationMap 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
NO_SPECIAL_CHARACTERS
Value contains no special characters
WHITESPACE
Text is all whitespace

close

public void close()
Notify the end of the event stream

comment

public void comment(CharSequence content, int locationId, int properties)
Notify a comment. Comments are only notified if they are outside the DTD.

Parameters: content The content of the comment locationId an integer which can be interpreted using a LocationMap 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

endDocument

public void endDocument()
Notify the end of a document node

endElement

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

getPipelineConfiguration

public PipelineConfiguration getPipelineConfiguration()
Get the pipeline configuration

namespace

public void namespace(int namespaceCode, int properties)
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.

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.

open

public void open()
Notify the start of the event stream

processingInstruction

public void processingInstruction(String name, CharSequence data, int locationId, int properties)
Output a processing instruction

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 LocationMap 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

setPipelineConfiguration

public void setPipelineConfiguration(PipelineConfiguration config)
Set the pipeline configuration

setSystemId

public void setSystemId(String systemId)
Set the System ID of the destination tree

setUnparsedEntity

public void setUnparsedEntity(String name, String systemID, String publicID)
Notify an unparsed entity URI.

Parameters: name The name of the unparsed entity systemID The system identifier of the unparsed entity publicID The public identifier of the unparsed entity

startContent

public void startContent()
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.

startDocument

public void startDocument(int properties)
Notify the start of a document node

startElement

public void startElement(int nameCode, int typeCode, int locationId, int properties)
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. The value -1 indicates the default type, xdt:untyped. locationId an integer which can be interpreted using a LocationMap 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.