Class XsltTransformer

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

public class XsltTransformer extends Object implements Destination
An XsltTransformer represents a compiled and loaded stylesheet ready for execution. The XsltTransformer holds details of the dynamic evaluation context for the stylesheet.

An XsltTransformer must not be used concurrently in multiple threads. It is safe, however, to reuse the object within a single thread to run the same stylesheet several times. Running the stylesheet does not change the context that has been established.

An XsltTransformer is always constructed by running the Load method of an XsltExecutable.

An XsltTransformer is itself a Destination. This means it is possible to use one XsltTransformer as the destination to receive the results of another transformation, this providing a simple way for transformations to be chained into a pipeline. Note however that a when the input to a transformation is supplied in this way, it will always be built as a tree in memory, rather than the transformation being streamed.

Since:
9.0
  • Field Details

    • baseOutputUriWasSet

      boolean baseOutputUriWasSet
  • Constructor Details

    • XsltTransformer

      protected XsltTransformer(Processor processor, Controller controller)
      Protected constructor
      Parameters:
      processor - the S9API processor
      controller - the Saxon controller object
  • Method Details

    • setInitialTemplate

      public void setInitialTemplate(QName templateName) throws SaxonApiException
      Set the initial named template for the transformation
      Parameters:
      templateName - the name of the initial template, or null to indicate that there should be no initial named template
      Throws:
      SaxonApiException - if there is no named template with this name
    • getInitialTemplate

      public QName getInitialTemplate()
      Get the initial named template for the transformation, if one has been set
      Returns:
      the name of the initial template, or null if none has been set
    • setInitialMode

      public void setInitialMode(QName modeName)
      Set the initial mode for the transformation
      Parameters:
      modeName - the name of the initial mode, or null to indicate the default (unnamed) mode
    • getInitialMode

      public QName getInitialMode()
      Get the name of the initial mode for the transformation, if one has been set.
      Returns:
      the initial mode for the transformation. Returns null if no mode has been set, or if the mode was set to null to represent the default (unnamed) mode
    • setSchemaValidationMode

      public void setSchemaValidationMode(ValidationMode mode)
      Set the schema validation mode for the transformation. This indicates how source documents loaded specifically for this transformation will be handled. This applies to the principal source document if supplied as a SAXSource or StreamSource, and to all documents loaded during the transformation using the doc(), document(), or collection() functions.
      Parameters:
      mode - the validation mode. Passing null causes no change to the existing value. Passing ValidationMode.DEFAULT resets to the initial value, which determines the validation requirements from the Saxon Configuration.
    • getSchemaValidationMode

      public ValidationMode getSchemaValidationMode()
      Get the schema validation mode for the transformation. This indicates how source documents loaded specifically for this transformation will be handled. This applies to the principal source document if supplied as a SAXSource or StreamSource, and to all documents loaded during the transformation using the doc(), document(), or collection() functions.
      Returns:
      the validation mode.
    • setSource

      public void setSource(Source source) throws SaxonApiException
      Set the source document for the transformation.

      If the source is an instance of NodeInfo, the supplied node is used directly as the context node of the query.

      If the source is an instance of DOMSource, the DOM node identified by the DOMSource is wrapped as a Saxon node, and this is then used as the context item

      In all other cases a new Saxon tree will be built by the transformation engine when the transformation starts, unless it is a Saxon-EE streaming transformation, in which case the document is processed in streaming fashion as it is being parsed.

      To run a transformation in streaming mode, the source should be supplied as an instance of StreamSource, SAXSource, or Transmitter.

      Parameters:
      source - the principal source document for the transformation
      Throws:
      SaxonApiException
    • setInitialContextNode

      public void setInitialContextNode(XdmNode node)
      Set the initial context node for the transformation.

      This is ignored in the case where the XsltTransformer is used as the Destination of another process. In that case the initial context node will always be the document node of the document that is being streamed to this destination.

      Calling this method has the side-effect of setting the initial source to null.

      Parameters:
      node - the initial context node, or null if there is to be no initial context node
    • getInitialContextNode

      public XdmNode getInitialContextNode()
      Get the initial context node for the transformation, if one has been set
      Returns:
      the initial context node, or null if none has been set. This will not necessarily be the same XdmNode instance as was supplied, but it will be an XdmNode object that represents the same underlying node.
    • setParameter

      public void setParameter(QName name, XdmValue value)
      Set the value of a stylesheet parameter
      Parameters:
      name - the name of the stylesheet parameter, as a QName
      value - the value of the stylesheet parameter, or null to clear a previously set value
    • getParameter

      public XdmValue getParameter(QName name)
      Get the value that has been set for a stylesheet parameter
      Parameters:
      name - the parameter whose name is required
      Returns:
      the value that has been set for the parameter, or null if no value has been set
    • setDestination

      public void setDestination(Destination destination)
      Set the destination to be used for the result of the transformation.

      This method can be used to chain transformations into a pipeline, by using one XsltTransformer as the destination of another

      If the destination is a Serializer, then a side-effect of this method is to set the base output URI for the transformation. This acts as the base URI for resolving the href attribute of any xsl:result-document instruction. The serialiation parameters defined in the Serializer override any serialization parameters defined using xsl:output for the principal output of the transformation. However, they have no effect on any output produced using xsl:result-document.

      Parameters:
      destination - the destination to be used
    • getDestination

      public Destination getDestination()
      Get the destination that was specified in a previous call of setDestination(net.sf.saxon.s9api.Destination)
      Returns:
      the destination, or null if none has been supplied
    • setBaseOutputURI

      public void setBaseOutputURI(String uri)
      Set the base output URI.

      This defaults to the system ID of the Destination for the principal output of the transformation if this is known; if it is not known, it defaults to the current directory.

      If no base output URI is supplied, but the Destination of the transformation is a Serializer that writes to a file, then the URI of this file is used as the base output URI.

      The base output URI is used for resolving relative URIs in the href attribute of the xsl:result-document instruction.

      Parameters:
      uri - the base output URI
      Since:
      9.2
    • getBaseOutputURI

      public String getBaseOutputURI()
      Get the base output URI.

      This returns the value set using the setBaseOutputURI(java.lang.String) method. If no value has been set explicitly, then the method returns null if called before the transformation, or the computed default base output URI if called after the transformation.

      The base output URI is used for resolving relative URIs in the href attribute of the xsl:result-document instruction.

      Returns:
      the base output URI
      Since:
      9.2
    • setURIResolver

      public void setURIResolver(URIResolver resolver)
      Set an object that will be used to resolve URIs used in fn:doc() and related functions.
      Parameters:
      resolver - An object that implements the URIResolver interface, or null.
      Since:
      9.3
    • getURIResolver

      public URIResolver getURIResolver()
      Get the URI resolver.
      Returns:
      the user-supplied URI resolver if there is one, or null otherwise
      Since:
      9.3
    • setErrorListener

      public void setErrorListener(ErrorListener listener)
      Set the ErrorListener to be used during this transformation
      Parameters:
      listener - The error listener to be used. This is notified of all dynamic errors detected during the transformation.
      Since:
      9.2
    • getErrorListener

      public ErrorListener getErrorListener()
      Get the ErrorListener being used during this compilation episode
      Returns:
      listener The error listener in use. This is notified of all dynamic errors detected during the transformation. If no user-supplied ErrorListener has been set the method will return a system-supplied ErrorListener.
      Since:
      9.2
    • setMessageListener

      public void setMessageListener(MessageListener listener)
      Set the MessageListener to be notified whenever the stylesheet evaluates an xsl:message instruction. If no MessageListener is nominated, the output of xsl:message instructions will be serialized and sent to the standard error stream.
      Parameters:
      listener - the MessageListener to be used
      Since:
      9.1
    • getMessageListener

      public MessageListener getMessageListener()
      Get the MessageListener to be notified whenever the stylesheet evaluates an xsl:message instruction. If no MessageListener has been nominated, return null
      Returns:
      the user-supplied MessageListener, or null if none has been supplied
      Since:
      9.1
    • setTraceListener

      public void setTraceListener(TraceListener listener)
      Set a TraceListener to be notified of all events occurring during the transformation. This will only be effective if the stylesheet was compiled with trace code enabled (see XsltCompiler.setCompileWithTracing(boolean))
      Parameters:
      listener - the TraceListener to be used. Note that the TraceListener has access to interal Saxon interfaces which may vary from one release to the next. It is also possible that the TraceListener interface itself may be changed in future releases.
      Since:
      9.2
    • getTraceListener

      public TraceListener getTraceListener()
      Get the TraceListener to be notified of all events occurring during the transformation. If no TraceListener has been nominated, return null
      Returns:
      the user-supplied TraceListener, or null if none has been supplied
      Since:
      9.2
    • transform

      public void transform() throws SaxonApiException
      Perform the transformation. If this method is used, a destination must have been supplied previously
      Throws:
      SaxonApiException - if any dynamic error occurs during the transformation
      IllegalStateException - if no destination has been supplied
    • getReceiver

      public Receiver getReceiver(Configuration config) throws SaxonApiException
      Return a Receiver which can be used to supply the principal source document for the transformation. This method is intended primarily for internal use, though it can also be called by a user application that wishes to feed events into the transformation engine.

      Saxon calls this method to obtain a Receiver, to which it then sends a sequence of events representing the content of an XML document. This method is provided so that XsltTransformer implements Destination, allowing one transformation to receive the results of another in a pipeline.

      Before calling this method, the setDestination(net.sf.saxon.s9api.Destination) method must be called to supply a destination for the transformation.

      Note that when an XsltTransformer is used as a Destination, the initial context node set on that XsltTransformer using setInitialContextNode(XdmNode) is ignored, as is the source set using setSource(javax.xml.transform.Source).

      Specified by:
      getReceiver in interface Destination
      Parameters:
      config - The Saxon configuration. This is supplied so that the destination can use information from the configuration (for example, a reference to the name pool) to construct or configure the returned Receiver.
      Returns:
      the Receiver to which events are to be sent.
      Throws:
      SaxonApiException - if the Receiver cannot be created
      IllegalStateException - if no Destination has been supplied
    • close

      public void close() throws SaxonApiException
      Close this destination, allowing resources to be released. Used when this XsltTransformer is acting as the destination of another transformation. Saxon calls this method when it has finished writing to the destination.
      Specified by:
      close in interface Destination
      Throws:
      SaxonApiException - if any failure occurs
    • getUnderlyingController

      public Controller getUnderlyingController()
      Get the underlying Controller used to implement this XsltTransformer. This provides access to lower-level methods not otherwise available in the s9api interface. Note that classes and methods obtained by this route cannot be guaranteed stable from release to release.
      Since:
      9.0.0.4