net.sf.saxon.functions

Class DocumentFn

java.lang.Object

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.DocumentFn

All Implemented Interfaces:

Callable, Function, GroundedValue, Item, Sequence

public class DocumentFn
extends SystemFunction
implements Callable

Implements the XSLT document() function

Constructor Summary

Constructors

Constructor and Description
DocumentFn()

Method Summary

Modifier and Type	Method and Description
Sequence	call(XPathContext context, Sequence[] arguments) Evaluate the expression
static DocumentKey	computeDocumentKey(java.lang.String href, java.lang.String baseURI, PackageData packageData, javax.xml.transform.URIResolver resolver, boolean strip) Compute a document key (an absolute URI that can be used to see if a document is already loaded)
protected static DocumentKey	computeDocumentKey(java.lang.String href, java.lang.String baseURI, PackageData packageData, XPathContext c) Compute a document key
int	getCardinality(Expression[] arguments) Determine the static cardinality
int	getSpecialProperties(Expression[] arguments) Get the static properties of this expression (other than its type).
static NodeInfo	makeDoc(java.lang.String href, java.lang.String baseURI, PackageData packageData, ParseOptions options, XPathContext c, Location locator, boolean silent) Supporting routine to load one external document given a URI (href) and a baseURI.
Expression	makeFunctionCall(Expression... arguments) Make an expression that either calls this function, or that is equivalent to a call on this function
static NodeInfo	preLoadDoc(java.lang.String href, java.lang.String baseURI, Configuration config, javax.xml.transform.SourceLocator locator) Supporting routine to load one external document given a URI (href) and a baseURI.
static javax.xml.transform.Source	resolveURI(java.lang.String href, java.lang.String baseURI, java.lang.String documentKey, XPathContext context) Call the URIResolver to resolve a URI
static void	sendDoc(java.lang.String href, java.lang.String baseURL, XPathContext c, Location locator, Receiver out, ParseOptions parseOptions) Supporting routine to push one external document given a URI (href) and a baseURI to a given Receiver.
static boolean	sourceIsTree(javax.xml.transform.Source source)

Methods inherited from class net.sf.saxon.functions.SystemFunction

dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCompilerName, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getStaticBaseUriString, getStreamerName, getUniStringArg, hashCode, importAttributes, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, makeOptimizedFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, toShortString, toString, typeCheckCaller

Methods inherited from class net.sf.saxon.functions.AbstractFunction

atomize, deepEquals, effectiveBooleanValue, getAnnotations, getUnicodeStringValue, isArray, isMap, makeNewContext, simplify, typeCheck

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.sf.saxon.om.Function

getGenre

Methods inherited from interface net.sf.saxon.om.Item

getLength, getStringValue, head, isStreamed, itemAt, iterate, reduce, subsequence

Methods inherited from interface net.sf.saxon.om.GroundedValue

asIterable, concatenate, containsNode, materialize

Methods inherited from interface net.sf.saxon.om.Sequence

makeRepeatable

Constructor Detail

DocumentFn

public DocumentFn()

Method Detail

getCardinality

public int getCardinality(Expression[] arguments)

Determine the static cardinality

Overrides:

getCardinality in class SystemFunction

Parameters:

arguments - the actual arguments supplied

Returns:

the most precise available cardinality that the function will return

getSpecialProperties

public int getSpecialProperties(Expression[] arguments)

Get the static properties of this expression (other than its type). The result is bit-signficant. These properties are used for optimizations. In general, if property bit is set, it is true, but if it is unset, the value is unknown.

Overrides:

getSpecialProperties in class SystemFunction

Parameters:

arguments - the expressions supplied as arguments to the function call

makeFunctionCall

public Expression makeFunctionCall(Expression... arguments)

Description copied from class: SystemFunction

Make an expression that either calls this function, or that is equivalent to a call on this function

Overrides:

makeFunctionCall in class SystemFunction

Parameters:

arguments - the supplied arguments to the function call

Returns:

either a function call on this function, or an expression that delivers the same result

sourceIsTree

public static boolean sourceIsTree(javax.xml.transform.Source source)

call

public Sequence call(XPathContext context,
                     Sequence[] arguments)
              throws XPathException

Evaluate the expression

Specified by:

call in interface Callable

Parameters:

context - the dynamic evaluation context

arguments - the values of the arguments, supplied as SequenceIterators

Returns:

the result of the evaluation, in the form of a SequenceIterator

Throws:

XPathException - if a dynamic error occurs during the evaluation of the expression

makeDoc

public static NodeInfo makeDoc(java.lang.String href,
                               java.lang.String baseURI,
                               PackageData packageData,
                               ParseOptions options,
                               XPathContext c,
                               Location locator,
                               boolean silent)
                        throws XPathException

Supporting routine to load one external document given a URI (href) and a baseURI. This is used in the normal case when a document is loaded at run-time (that is, when a Controller is available)

Parameters:

href - the relative URI

baseURI - the base URI

packageData - the stylesheet (or other) package in which the call appears

options - parse options to be used. May be null.

c - the dynamic XPath context

locator - used to identify the location of the instruction in event of error

silent - if true, errors should not be notified to the ErrorListener

Returns:

the root of the constructed document, or the selected element within the document if a fragment identifier was supplied, or null if the URIResolver returns an instance of EmptySource;

Throws:

XPathException - if reading or parsing the document fails

resolveURI

public static javax.xml.transform.Source resolveURI(java.lang.String href,
                                                    java.lang.String baseURI,
                                                    java.lang.String documentKey,
                                                    XPathContext context)
                                             throws XPathException

Call the URIResolver to resolve a URI

Parameters:

href - the supplied relative URI, stripped of any fragment identifier

baseURI - the base URI

documentKey - the absolute URI if already available, or null otherwise

context - the dynamic context

Returns:

a Source representing the document to be read

Throws:

XPathException - if the relative URI cannot be resolved

computeDocumentKey

protected static DocumentKey computeDocumentKey(java.lang.String href,
                                                java.lang.String baseURI,
                                                PackageData packageData,
                                                XPathContext c)
                                         throws XPathException

Compute a document key

Throws:

XPathException

computeDocumentKey

public static DocumentKey computeDocumentKey(java.lang.String href,
                                             java.lang.String baseURI,
                                             PackageData packageData,
                                             javax.xml.transform.URIResolver resolver,
                                             boolean strip)

Compute a document key (an absolute URI that can be used to see if a document is already loaded)

Parameters:

href - the relative URI

baseURI - the base URI

packageData - the package in which the call to doc() or document() appears (affects options such as strip-space)

resolver - the URIResolver

strip - true if the document is subject to whitespace stripping (typically a source document), false otherwise (typically a stylesheet module)

preLoadDoc

public static NodeInfo preLoadDoc(java.lang.String href,
                                  java.lang.String baseURI,
                                  Configuration config,
                                  javax.xml.transform.SourceLocator locator)
                           throws XPathException

Supporting routine to load one external document given a URI (href) and a baseURI. This is used when the document is pre-loaded at compile time.

Parameters:

href - the relative URI. This must not contain a fragment identifier

baseURI - the base URI

config - the Saxon configuration

locator - used to identify the location of the instruction in event of error. May be null.

Returns:

the root of the constructed document, or the selected element within the document if a fragment identifier was supplied

Throws:

XPathException

sendDoc

public static void sendDoc(java.lang.String href,
                           java.lang.String baseURL,
                           XPathContext c,
                           Location locator,
                           Receiver out,
                           ParseOptions parseOptions)
                    throws XPathException

Supporting routine to push one external document given a URI (href) and a baseURI to a given Receiver. This method cannot handle fragment identifiers

Parameters:

href - the relative URI

baseURL - the base URI

c - the XPath dynamic context

locator - used to identify the lcoation of the instruction in case of error

out - the destination where the document is to be sent

Throws:

XPathException