Package net.sf.saxon.s9api
This package provides a Java API for Saxon that hides as much as possible of the detail of the implementation. However, the API architecture faithfully reflects the internal architecture of the Saxon product, unlike standard APIs such as JAXP and XQJ which in many cases force compromises in the design of the application.
An application starts by loading a Processor
, which allows configuration options
to be set. As far as possible, an application should instantiate a single Processor
.
The interfaces for XSLT, XQuery, and XPath processing all follow the same pattern. There is a three-stage
execution model: first a compiler is created using a factory method in the Processor
object.
The compiler holds compile-time options and the static context information. Then the compiler's
compile()
method is called to create an executable, a representation of the compiled stylesheet,
query, or expression. This is thread-safe and immutable once created. To run the query or transformation,
first call the load()
method to create a run-time object called variously an XsltTransformer
,
XQueryEvaluator
, or XPathSelector
. This holds run-time context information
such as parameter settings and the initial context node; the object is therefore not shareable and should
only be run in a single thread; indeed it should normally only be used once. This object also provides
methods allowing the transformation or query to be executed.
In the schema-aware product the Processor
owns a SchemaManager
that holds
the cache of schema components and can be used to load new schema components from source schema documents.
It can also be used to create a SchemaValidator
, which in turn is used to validate instance
documents.
Source documents can be constructed using a DocumentBuilder
, which holds all the options
and parameters to control document building.
The output of a transformation, or of any other process that generates an XML tree, can be sent to a
Destination
. There are a number of implementations of this interface, including a
Serializer
which translates the XML document tree into lexical XML form.
There are classes to represent the objects of the XDM data model, including XDMValue
,
XDMItem
, XDMNode
, and XDMAtomicValue
.
The s9api interface is designed to take advantage of Java 5 constructs such as generics and iterables. Although the main Saxon run-time continues to work under JDK 1.4, the s9api interface cannot be used without upgrading to Java 5. For this reason it is in a separate JAR file.
Michael H. Kay
Saxonica Limited
27 September 2007
-
ClassDescriptionThis is an enumeration class containaing constants representing the thirteen XPath axesA Destination represents a place where XML can be sent.A document builder holds properties controlling how a Saxon document tree should be built, and provides methods to invoke the tree construction.This class represents a Destination (for example, the destination of the output of a transformation) in which the results are written to a newly constructed DOM tree in memory.An item type, as defined in the XPath/XQuery specifications.This class is used for creating ItemType objects.A user-written implementation of the MessageListener interface may be registered with the XsltTransformer to receive notification of xsl:message output.Represents one of the possible occurrence indicators in a SequenceType.The
Processor
class serves three purposes: it allows global Saxon configuration options to be set; it acts as a factory for generating XQuery, XPath, and XSLT compilers; and it owns certain shared resources such as the Saxon NamePool and compiled schemas.The QName class represents an instance of xs:QName, as defined in the XPath 2.0 data model.This class represents a Destination (for example, the destination of the output of a transformation) in which events representing the XML document are sent to a user-supplied SAX2 ContentHandler, as if the ContentHandler were receiving the document directly from an XML parser.An exception thrown by the Saxon s9api API.An unchecked exception thrown by the Saxon API.The SchemaManager is used to load schema documents, and to set options for the way in which they are loaded.A SchemaValidator is an object that is used for validating instance documents against a schema.A Serializer takes a tree representation of XML and turns it into lexical XML markup.A TeeDestination allows writing to two destinations at once.WhitespaceStrippingPolicy is an enumeration class defining the possible policies for handling whitespace text nodes in a source document.The class XdmAtomicValue represents an item in an XPath 2.0 sequence that is an atomic value.AnXdmDestination
is aDestination
in which anXdmNode
is constructed to hold the output of a query or transformation: that is, a tree using Saxon's implementation of the XDM data modelThe class XdmEmptySequence represents an empty sequence in the XDM Data Model.The class XdmItem represents an item in a sequence, as defined by the XDM data model.This class represents a node in the XDM data model.Enumeration class defining the seven kinds of node defined in the XDM modelAn iterator over an XPath sequence.An value in the XDM data model.An XPathCompiler object allows XPath queries to be compiled.An XPathExecutable represents the compiled form of an XPath expression.An XPathSelector represents a compiled and loaded XPath expression ready for execution.An XQueryCompiler object allows XQuery 1.0 queries to be compiled.AnXQueryEvaluator
represents a compiled and loaded stylesheet ready for execution.An XQueryExecutable represents the compiled form of a query.An XsltCompiler object allows XSLT 2.0 stylesheets to be compiled.An XsltExecutable represents the compiled form of a stylesheet.AnXsltTransformer
represents a compiled and loaded stylesheet ready for execution.