Class Serializer

  • All Implemented Interfaces:
    Destination

    public class Serializer
    extends java.lang.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.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      static class  Serializer.Property
      Enumerator over the defined serialization properties
    • Constructor Summary

      Constructors 
      Constructor Description
      Serializer()
      Create a Serializer
      Serializer​(java.io.File file)
      Create a Serializer initialized to write to a given File.
      Serializer​(java.io.OutputStream stream)
      Create a Serializer initialized to write to a given OutputStream.
      Serializer​(java.io.Writer writer)
      Create a Serializer initialized to write to a given Writer.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      Close any resources associated with this destination.
      java.lang.Object getOutputDestination()
      Get the current output destination.
      protected java.util.Properties getOutputProperties()
      Create a Properties object holding the defined serialization properties.
      java.lang.String getOutputProperty​(Serializer.Property property)
      Get the value of a serialization property
      Receiver getReceiver​(Configuration config)
      Return a receiver to which Saxon will send events.
      protected Receiver getReceiver​(Executable executable)
      Return a receiver to which Saxon will send events.
      protected javax.xml.transform.Result getResult()
      Get the JAXP StreamResult object representing the output destination of this serializer
      StreamWriterToReceiver getXMLStreamWriter()
      Get an XMLStreamWriter that can be used for writing application-generated XML to be output via this serializer.
      void serializeNode​(XdmNode node)
      Serialize an XdmNode to the selected output destination using this serializer
      java.lang.String serializeNodeToString​(XdmNode node)
      Serialize an XdmNode to a string using this serializer
      void serializeXdmValue​(XdmValue value)
      Serialize an arbitrary XdmValue to the selected output destination using this serializer.
      void setOutputFile​(java.io.File file)
      Set the destination of the serialized output, as a File.
      void setOutputProperty​(Serializer.Property property, java.lang.String value)
      Set the value of a serialization property.
      void setOutputStream​(java.io.OutputStream stream)
      Set the destination of the serialized output, as an OutputStream.
      void setOutputWriter​(java.io.Writer writer)
      Set the destination of the serialized output, as a Writer.
      void setProcessor​(Processor processor)
      Set the Processor associated with this Serializer.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • Serializer

        public Serializer()
        Create a Serializer
      • Serializer

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

      • 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,
                                      java.lang.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:
        java.lang.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 java.lang.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​(java.io.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​(java.io.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​(java.io.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:
        java.lang.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:
        java.lang.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 java.lang.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:
        java.lang.IllegalStateException - if no Processor has been set for this Serializer
        SaxonApiException - if any other failure occurs
        Since:
        9.3
      • 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 java.util.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 javax.xml.transform.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