Class Serializer

java.lang.Object
net.sf.saxon.s9api.Serializer
All Implemented Interfaces:
Destination

public class Serializer extends Object implements Destination
A Serializer takes a tree representation of XML and turns it into lexical XML markup.

Note that this is XML serialization in the sense of the W3C XSLT and XQuery specifications. This has nothing to do with the serialization of Java objects, or the Serializable interface.

The serialization may be influenced by a number of serialization parameters. A parameter has a name, which is an instance of Serializer.Property, and a value, which is expressed as a string. The effect of most of the properties is as described in the W3C specification XSLT 2.0 and XQuery 1.0 Serialization. Saxon supports all the serialization parameters defined in that specification, together with some additional parameters, whose property names are prefixed "SAXON_".

Serialization parameters defined via this interface take precedence over any serialization parameters defined within the source of the query or stylesheet.

  • Constructor Details

    • Serializer

      public Serializer()
      Create a Serializer
    • Serializer

      public Serializer(OutputStream stream)
      Create a Serializer initialized to write to a given OutputStream.

      Closing the output stream after use is the responsibility of the caller.

      Parameters:
      stream - The OutputStream to which the Serializer will write
    • Serializer

      public Serializer(Writer writer)
      Create a Serializer initialized to write to a given Writer.

      Closing the writer after use is the responsibility of the caller.

      Parameters:
      writer - The Writer to which the Serializer will write
    • Serializer

      public Serializer(File file)
      Create a Serializer initialized to write to a given File.
      Parameters:
      file - The File to which the Serializer will write
  • Method Details

    • setProcessor

      public void setProcessor(Processor processor)
      Set the Processor associated with this Serializer. This will be called automatically if the serializer is created using one of the Processor.newSerializer() methods. The Serializer currently needs to know about the Processor only if the method getXMLStreamWriter() is called.
      Parameters:
      processor - the associated Processor
      Since:
      9.3
    • setOutputProperty

      public void setOutputProperty(Serializer.Property property, String value)
      Set the value of a serialization property. Any existing value of the property is overridden. If the supplied value is null, any existing value of the property is removed.

      Example:

      serializer.setOutputProperty(Serializer.Property.METHOD, "xml");

      Any serialization properties supplied via this interface take precedence over serialization properties defined in the source stylesheet or query.

      Parameters:
      property - The name of the property to be set
      value - The value of the property, as a string. The format is generally as defined in the xsl:output declaration in XSLT: this means that boolean properties, for example, are represented using the strings "yes" and "no". Properties whose values are QNames, such as cdata-section-elements are expressed using the Clark representation of a QName, that is "{uri}local". Multi-valued properties (again, cdata-section-elements is an example) are expressed as a space-separated list.
      Throws:
      IllegalArgumentException - if the value of the property is invalid. The property is validated individually; invalid combinations of properties will be detected only when the properties are actually used to serialize an XML event stream.
    • getOutputProperty

      public String getOutputProperty(Serializer.Property property)
      Get the value of a serialization property
      Parameters:
      property - the name of the required property
      Returns:
      the value of the required property as a string, or null if the property has not been given any value.
    • setOutputWriter

      public void setOutputWriter(Writer writer)
      Set the destination of the serialized output, as a Writer.

      Note that when this option is used, the serializer does not perform character encoding. This also means that it never replaces special characters with XML numeric character references. The final encoding is the responsibility of the supplied Writer.

      Closing the writer after use is the responsibility of the caller.

      Calling this method has the side-effect of setting the OutputStream and OutputFile to null.

      Parameters:
      writer - the Writer to which the serialized XML output will be written.
    • setOutputStream

      public void setOutputStream(OutputStream stream)
      Set the destination of the serialized output, as an OutputStream.

      Closing the output stream after use is the responsibility of the caller.

      Calling this method has the side-effect of setting the OutputWriter and OutputFile to null.

      Parameters:
      stream - the OutputStream to which the serialized XML output will be written.
    • setOutputFile

      public void setOutputFile(File file)
      Set the destination of the serialized output, as a File.

      Calling this method has the side-effect of setting the current OutputWriter and OutputStream to null.

      Parameters:
      file - the File to which the serialized XML output will be written.
    • serializeNode

      public void serializeNode(XdmNode node) throws SaxonApiException
      Serialize an XdmNode to the selected output destination using this serializer
      Parameters:
      node - The node to be serialized
      Throws:
      IllegalStateException - if no outputStream, Writer, or File has been supplied as the destination for the serialized output
      SaxonApiException - if a serialization error or I/O error occurs
      Since:
      9.3
    • serializeXdmValue

      public void serializeXdmValue(XdmValue value) throws SaxonApiException
      Serialize an arbitrary XdmValue to the selected output destination using this serializer. The supplied sequence is first wrapped in a document node according to the rules given in section 2 (Sequence Normalization) of the XSLT/XQuery serialization specification; the resulting document nodes is then serialized using the serialization parameters defined in this serializer.
      Parameters:
      value - The value to be serialized
      Throws:
      IllegalStateException - if no outputStream, Writer, or File has been supplied as the destination for the serialized output, or if no Processor is associated with the serializer
      SaxonApiException - if a serialization error or I/O error occurs
      Since:
      9.3
    • serializeNodeToString

      public String serializeNodeToString(XdmNode node) throws SaxonApiException
      Serialize an XdmNode to a string using this serializer
      Parameters:
      node - The node to be serialized
      Returns:
      the serialized representation of the node as lexical XML
      Throws:
      SaxonApiException - if a serialization error occurs
      Since:
      9.3
    • getXMLStreamWriter

      public StreamWriterToReceiver getXMLStreamWriter() throws SaxonApiException
      Get an XMLStreamWriter that can be used for writing application-generated XML to be output via this serializer.
      Returns:
      a newly constructed XMLStreamWriter that pipes events into this Serializer
      Throws:
      IllegalStateException - if no Processor has been set for this Serializer
      SaxonApiException - if any other failure occurs
      Since:
      9.3
    • getOutputDestination

      public Object getOutputDestination()
      Get the current output destination.
      Returns:
      an OutputStream, Writer, or File, depending on the previous calls to setOutputStream(java.io.OutputStream), setOutputWriter(java.io.Writer), or setOutputFile(java.io.File); or null, if no output destination has been set up.
    • getReceiver

      public Receiver getReceiver(Configuration config) throws SaxonApiException
      Return a receiver to which Saxon will send events. This method is provided primarily for internal use, though it could also be called by user applications wanting to make use of the Saxon serializer.
      Specified by:
      getReceiver in interface Destination
      Parameters:
      config - The Saxon configuration. This is an internal implementation object held within the Processor
      Returns:
      a receiver to which XML events will be sent
      Throws:
      SaxonApiException - if the Receiver cannot be created
    • getReceiver

      protected Receiver getReceiver(Executable executable) throws SaxonApiException
      Return a receiver to which Saxon will send events. This method is provided primarily for internal use, though it could also be called by user applications wanting to make use of the Saxon serializer.
      Parameters:
      executable - The Saxon Executable for the transformation or query. The serialization properties defined in this Serializer are supplemented by properties that have been defined in the query or stylesheet associated with the Executable. The properties defined in this Serializer take precedence over those in the stylesheet or query.
      Returns:
      a receiver to which XML events will be sent
      Throws:
      SaxonApiException - if any failure occurs
    • getOutputProperties

      protected Properties getOutputProperties()
      Create a Properties object holding the defined serialization properties. This will be in the same format as JAXP interfaces such as Transformer.getOutputProperties()
      Returns:
      a newly-constructed Properties object holding the declared serialization properties
    • getResult

      protected Result getResult()
      Get the JAXP StreamResult object representing the output destination of this serializer
    • close

      public void close() throws SaxonApiException
      Close any resources associated with this destination. Note that this does not close any user-supplied OutputStream or Writer; those must be closed explicitly by the calling application.
      Specified by:
      close in interface Destination
      Throws:
      SaxonApiException - if any failure occurs