Package net.sf.saxon.event

Interface Receiver

All Superinterfaces:
Result
All Known Subinterfaces:
ReceiverWithOutputProperties
All Known Implementing Classes:
AdaptiveEmitter, BinaryTextDecoder, Builder, BuilderMonitor, CDATAFilter, CharacterMapExpander, CheckSumFilter, CloseNotifier, CommentStripper, ComplexContentOutputter, ContentHandlerProxy, CountingFilter, DocumentValidator, DOM4JWriter, DOMWriter, Emitter, EventBuffer, EventMonitor, HTML40Emitter, HTML50Emitter, HTMLEmitter, HTMLIndenter, HTMLURIEscaper, IDFilter, IgnorableWhitespaceStripper, JDOM2Writer, JDOMWriter, JsonReceiver, JSONSerializer, LinkedBuilderMonitor, LinkedTreeBuilder, MessageEmitter, MessageListener2Proxy, MessageListenerProxy, MessageWarner, MetaTagAdjuster, NamePoolConverter, NamespaceReducer, PackageInspector, PathMaintainer, PIGrabber, PrincipalOutputGatekeeper, ProxyReceiver, ReceiverToXMLStreamWriter, RegularSequenceChecker, SequenceNormalizer, SequenceNormalizerWithItemSeparator, SequenceNormalizerWithSpaceSeparator, SequenceOutputter, SequenceReceiver, SequenceWrapper, SequenceWriter, SignificantItemDetector, Sink, StartTagBuffer, Stripper, TeeOutputter, TEXTEmitter, TinyBuilder, TinyBuilderCondensed, TinyBuilderMonitor, TracingFilter, TransformerReceiver, TreeReceiver, TypeCheckingFilter, UncommittedSerializer, UnicodeNormalizer, UseWhenFilter, Valve, XHTML1Emitter, XHTML5Emitter, XHTMLPrefixRemover, XHTMLURIEscaper, XML10ContentChecker, XMLEmitter, XMLIndenter, XOMWriter
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. 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.

Since:
8.0. Extended in 9.9 to support additional methods with default implementations.

  • Method Details

    • setPipelineConfiguration

      void setPipelineConfiguration(PipelineConfiguration pipe)
      Set the pipeline configuration
      Parameters:
      pipe - the pipeline configuration

    • getPipelineConfiguration

      PipelineConfiguration getPipelineConfiguration()
      Get the pipeline configuration
      Returns:
      the pipeline configuration

    • setSystemId

      void setSystemId(String systemId)
      Set the System ID of the tree represented by this event stream
      Specified by:
      setSystemId in interface Result
      Parameters:
      systemId - the system ID (which is used as the base URI of the nodes if there is no xml:base attribute)

    • open

      void open() throws XPathException
      Notify the start of the event stream
      Throws:
      XPathException - if an error occurs

    • startDocument

      void startDocument(int properties) throws XPathException
      Notify the 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 - if an error occurs

    • endDocument

      void endDocument() throws XPathException
      Notify the end of a document node
      Throws:
      XPathException - if an error occurs

    • setUnparsedEntity

      void setUnparsedEntity(String name, String systemID, String publicID) throws XPathException
      Notify an unparsed entity URI.
      Parameters:
      name - The name of the unparsed entity
      systemID - The system identifier of the unparsed entity
      publicID - The identifier of the unparsed entity
      Throws:
      XPathException - if an error occurs

    • startElement

      void startElement(NodeName elemName, SchemaType typeCode, Location location, int properties) throws XPathException
      Notify the start of an element
      Parameters:
      elemName - the name of the element.
      typeCode - 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 revelant properties, zero is supplied. The definitions of the bits are in class ReceiverOptions
      Throws:
      XPathException - if an error occurs

    • namespace

      void namespace(NamespaceBindingSet namespaceBindings, int properties) throws XPathException
      Notify one or more namespaces. 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:
      namespaceBindings - contains the namespace prefix and namespace URI
      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:
      Throws:
      XPathException - if an error occurs
      Since:
      9.8: changed in 9.8 to allow multiple namespace bindings to be supplied in a single call

    • attribute

      void attribute(NodeName attName, SimpleType typeCode, CharSequence value, Location location, 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:
      attName - The name of the attribute
      typeCode - 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

    • startContent

      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 - if an error occurs

    • endElement

      void endElement() throws XPathException
      Notify the end of an element. The receiver must maintain a stack if it needs to know which element is ending.
      Throws:
      XPathException - if an error occurs

    • characters

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

      void processingInstruction(String name, CharSequence data, Location location, int properties) throws XPathException
      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
      location - provides information such as line number and system ID.
      properties - Additional information about the PI.
      Throws:
      XPathException - if an error occurs

    • comment

      void comment(CharSequence content, Location location, int properties) throws XPathException
      Notify a comment. Comments are only notified if they are outside the DTD.
      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

      default void append(Item item, Location locationId, int properties) throws XPathException
      Append an arbitrary item (node, atomic value, or function) to the output. The default implementation throws UnsupportedOperationException.
      Parameters:
      item - the item to be appended
      locationId - 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 ReceiverOptions.ALL_NAMESPACES, ReceiverOptions.LOCAL_NAMESPACES; the default (0) means no namespaces
      Throws:
      XPathException

    • append

      default void append(Item item) throws XPathException
      Append an arbitrary item (node, atomic value, or function) to the output. By default, if the item is an element node, it is copied with all namespaces. The default implementation calls append(Item, Location, int), whose default implementation throws UnsupportedOperationException
      Parameters:
      item - the item to be appended
      Throws:
      XPathException - if the operation fails

    • close

      void close() throws XPathException
      Notify the end of the event stream
      Throws:
      XPathException - if an error occurs

    • usesTypeAnnotations

      default boolean usesTypeAnnotations()
      Ask whether this Receiver (or the downstream pipeline) makes any use of the type annotations supplied on element and attribute events. The default implementation of this method returns false.
      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 (or conversely, it may avoid stripping unwanted type annotations)

    • handlesAppend

      default boolean handlesAppend()
      Ask whether this Receiver can handle arbitrary items in its append(net.sf.saxon.om.Item, net.sf.saxon.expr.parser.Location, int) and append(Item, Location, int) methods. If it cannot, then calling these methods will raise an exception (typically but not necessarily an UnsupportedOperationException). The default implementation of this method returns false.
      Returns:
      true if the Receiver is able to handle items supplied to its append(net.sf.saxon.om.Item, net.sf.saxon.expr.parser.Location, int) and append(Item, Location, int) methods. A receiver that returns true may still reject some kinds of item, for example it may reject function items.