Class Emitter

  • All Implemented Interfaces:
    javax.xml.transform.Result, Receiver, ReceiverWithOutputProperties
    Direct Known Subclasses:
    BinaryEmitter, XMLEmitter

    public abstract class Emitter
    extends SequenceReceiver
    implements ReceiverWithOutputProperties
    Emitter: This abstract class defines methods that must be implemented by components that format SAXON output. There is one emitter for XML, one for HTML, and so on. Additional methods are concerned with setting options and providing a Writer.

    The interface is deliberately designed to be as close as possible to the standard SAX2 ContentHandler interface, however, it allows additional information to be made available.

    An Emitter is a Receiver, specifically it is a Receiver that can direct output to a Writer or OutputStream, using serialization properties defined in a Properties object.

    The Emitter (from 11.0 onwards) writes to a UnicodeWriter, which may itself bridge to a Writer or OutputStream.

    • Field Detail

      • outputProperties

        protected java.util.Properties outputProperties
      • allCharactersEncodable

        protected boolean allCharactersEncodable
    • Constructor Detail

      • Emitter

        public Emitter()
    • Method Detail

      • setOutputProperties

        public void setOutputProperties​(java.util.Properties details)
                                 throws XPathException
        Set output properties
        details - the output serialization properties
        XPathException - if an error occurs finding the encoding property
      • getOutputProperties

        public java.util.Properties getOutputProperties()
        Get the output properties
        Specified by:
        getOutputProperties in interface ReceiverWithOutputProperties
        the output serialization properties. The returned value will be null if setOutputProperties() has not been called
      • setUnicodeWriter

        public void setUnicodeWriter​(UnicodeWriter unicodeWriter)
        Set the output destination to which the emitter's output will be written
        unicodeWriter - the output destination
      • setMustClose

        public void setMustClose​(boolean mustClose)
        Set a flag indicating that the unicode writer must be closed after use. This will generally be true if the writer was created by Saxon, and false if it was supplied by the user
        mustClose - true if the unicode writer is to be closed after use.
      • setUnparsedEntity

        public void setUnparsedEntity​(java.lang.String name,
                                      java.lang.String uri,
                                      java.lang.String publicId)
                               throws XPathException
        Set unparsed entity URI. Needed to satisfy the Receiver interface, but not used, because unparsed entities can occur only in input documents, not in output documents.
        Specified by:
        setUnparsedEntity in interface Receiver
        setUnparsedEntity in class SequenceReceiver
        name - the entity name
        uri - the entity system ID
        publicId - the entity public ID
        XPathException - if an error occurs
      • 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
        Specified by:
        usesTypeAnnotations in interface Receiver
        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)
      • 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
        Specified by:
        append in class SequenceReceiver
        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
        XPathException - if an error occurs