com.icl.saxon.style
Class ExpressionContext

java.lang.Object
  com.icl.saxon.style.ExpressionContext

All Implemented Interfaces:

StaticContext

public class ExpressionContext

extends java.lang.Object

implements StaticContext

An ExpressionContext represents the context for an XPath expression written in the stylesheet.

Constructor Summary

ExpressionContext(StyleElement styleElement)

Method Summary

boolean	allowsKeyFunction() Determine whether the key() function is permmitted in this context
Binding	bindVariable(int fingerprint) Bind a variable to an object that can be used to refer to it
boolean	forwardsCompatibleModeIsEnabled() Determine whether forwards-compatible mode is enabled
java.lang.String	getBaseURI() Get the Base URI of the element containing the expression, for resolving any relative URI's used in the expression.
java.lang.Class	getExternalJavaClass(java.lang.String uri) Get an external Java class corresponding to a given namespace prefix, if there is one.
int	getFingerprint(java.lang.String qname, boolean useDefault) Get a fingerprint for a name, using this as the context for namespace resolution
int	getLineNumber() Get the line number of the expression within its containing entity Returns -1 if no line number is available
Function	getStyleSheetFunction(int fingerprint)
java.lang.String	getSystemId() Get the System ID of the entity containing the expression (used for diagnostics)
java.lang.String	getURIForPrefix(java.lang.String prefix) Get the URI for a prefix, using this Element as the context for namespace resolution
java.lang.String	getVersion() Get the effective XSLT version in this region of the stylesheet
boolean	isElementAvailable(java.lang.String qname) Determine if an extension element is available
boolean	isExtensionNamespace(short uriCode) Determine whether a given URI code identifies an extension element namespace
boolean	isFunctionAvailable(java.lang.String qname) Determine if a function is available
int	makeNameCode(java.lang.String qname, boolean useDefault) Make a NameCode, using this Element as the context for namespace resolution
NamespaceTest	makeNamespaceTest(short nodeType, java.lang.String prefix) Make a NamespaceTest, using this element as the context for namespace resolution
NameTest	makeNameTest(short nodeType, java.lang.String qname, boolean useDefault) Make a NameTest, using this element as the context for namespace resolution
StaticContext	makeRuntimeContext(NamePool pool) Create a context for parsing XPath expressions at runtime, using this styelsheet element for namespace declarations, variables, etc, but using the runtime NamePool
java.lang.String	toString() String representation for diagnostics

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ExpressionContext

public ExpressionContext(StyleElement styleElement)

Method Detail

makeRuntimeContext

public StaticContext makeRuntimeContext(NamePool pool)

Create a context for parsing XPath expressions at runtime, using this styelsheet element for namespace declarations, variables, etc, but using the runtime NamePool

Specified by:

makeRuntimeContext in interface StaticContext

getSystemId

public java.lang.String getSystemId()

Get the System ID of the entity containing the expression (used for diagnostics)

Specified by:

getSystemId in interface StaticContext

getLineNumber

public int getLineNumber()

Get the line number of the expression within its containing entity Returns -1 if no line number is available

Specified by:

getLineNumber in interface StaticContext

getBaseURI

public java.lang.String getBaseURI()

Get the Base URI of the element containing the expression, for resolving any relative URI's used in the expression. Used by the document() function.

Specified by:

getBaseURI in interface StaticContext

getURIForPrefix

public java.lang.String getURIForPrefix(java.lang.String prefix)
                                 throws XPathException

Get the URI for a prefix, using this Element as the context for namespace resolution

Specified by:

getURIForPrefix in interface StaticContext

Parameters:

prefix - The prefix

Throws:

XPathException

makeNameCode

public final int makeNameCode(java.lang.String qname,
                              boolean useDefault)
                       throws XPathException

Make a NameCode, using this Element as the context for namespace resolution

Specified by:

makeNameCode in interface StaticContext

Parameters:

qname - The name as written, in the form "[prefix:]localname"

Throws:

XPathException

getFingerprint

public int getFingerprint(java.lang.String qname,
                          boolean useDefault)
                   throws XPathException

Get a fingerprint for a name, using this as the context for namespace resolution

Specified by:

getFingerprint in interface StaticContext

Parameters:

qname - The name as written, in the form "[prefix:]localname"

Returns:

-1 if the name is not already present in the name pool

Throws:

XPathException

makeNameTest

public NameTest makeNameTest(short nodeType,
                             java.lang.String qname,
                             boolean useDefault)
                      throws XPathException

Make a NameTest, using this element as the context for namespace resolution

Specified by:

makeNameTest in interface StaticContext

Throws:

XPathException

makeNamespaceTest

public NamespaceTest makeNamespaceTest(short nodeType,
                                       java.lang.String prefix)
                                throws XPathException

Make a NamespaceTest, using this element as the context for namespace resolution

Specified by:

makeNamespaceTest in interface StaticContext

Throws:

XPathException

bindVariable

public Binding bindVariable(int fingerprint)
                     throws XPathException

Bind a variable to an object that can be used to refer to it

Specified by:

bindVariable in interface StaticContext

Parameters:

fingerprint - The fingerprint of the variable name

Returns:

a Binding object that can be used to identify it in the Bindery

Throws:

XPathException - if the variable has not been declared

isExtensionNamespace

public boolean isExtensionNamespace(short uriCode)
                             throws XPathException

Determine whether a given URI code identifies an extension element namespace

Specified by:

isExtensionNamespace in interface StaticContext

Throws:

XPathException

forwardsCompatibleModeIsEnabled

public boolean forwardsCompatibleModeIsEnabled()
                                        throws XPathException

Determine whether forwards-compatible mode is enabled

Specified by:

forwardsCompatibleModeIsEnabled in interface StaticContext

Throws:

XPathException

getStyleSheetFunction

public Function getStyleSheetFunction(int fingerprint)
                               throws XPathException

Specified by:

getStyleSheetFunction in interface StaticContext

Throws:

XPathException

getExternalJavaClass

public java.lang.Class getExternalJavaClass(java.lang.String uri)
                                     throws TransformerException

Get an external Java class corresponding to a given namespace prefix, if there is one.

Specified by:

getExternalJavaClass in interface StaticContext

Parameters:

uri - The namespace URI corresponding to the prefix used in the function call.

Returns:

the Java class name if a suitable class exists, otherwise return null.

Throws:

TransformerException - if the class is found, but cannot be loaded.

isElementAvailable

public boolean isElementAvailable(java.lang.String qname)
                           throws XPathException

Determine if an extension element is available

Specified by:

isElementAvailable in interface StaticContext

Throws:

XPathException - if the name is invalid or the prefix is not declared

isFunctionAvailable

public boolean isFunctionAvailable(java.lang.String qname)
                            throws XPathException

Determine if a function is available

Specified by:

isFunctionAvailable in interface StaticContext

Throws:

XPathException

allowsKeyFunction

public boolean allowsKeyFunction()

Determine whether the key() function is permmitted in this context

Specified by:

allowsKeyFunction in interface StaticContext

getVersion

public java.lang.String getVersion()

Get the effective XSLT version in this region of the stylesheet

Specified by:

getVersion in interface StaticContext

toString

public java.lang.String toString()

String representation for diagnostics