com.icl.saxon.style

Class ExpressionContext

public class ExpressionContext extends Object implements StaticContext

An ExpressionContext represents the context for an XPath expression written in the stylesheet.
Constructor Summary
ExpressionContext(StyleElement styleElement)
Method Summary
booleanallowsKeyFunction()
Determine whether the key() function is permmitted in this context
BindingbindVariable(int fingerprint)
Bind a variable to an object that can be used to refer to it
booleanforwardsCompatibleModeIsEnabled()
Determine whether forwards-compatible mode is enabled
StringgetBaseURI()
Get the Base URI of the element containing the expression, for resolving any relative URI's used in the expression.
ClassgetExternalJavaClass(String uri)
Get an external Java class corresponding to a given namespace prefix, if there is one.
intgetFingerprint(String qname, boolean useDefault)
Get a fingerprint for a name, using this as the context for namespace resolution
intgetLineNumber()
Get the line number of the expression within its containing entity Returns -1 if no line number is available
FunctiongetStyleSheetFunction(int fingerprint)
StringgetSystemId()
Get the System ID of the entity containing the expression (used for diagnostics)
StringgetURIForPrefix(String prefix)
Get the URI for a prefix, using this Element as the context for namespace resolution
StringgetVersion()
Get the effective XSLT version in this region of the stylesheet
booleanisElementAvailable(String qname)
Determine if an extension element is available
booleanisExtensionNamespace(short uriCode)
Determine whether a given URI code identifies an extension element namespace
booleanisFunctionAvailable(String qname)
Determine if a function is available
intmakeNameCode(String qname, boolean useDefault)
Make a NameCode, using this Element as the context for namespace resolution
NamespaceTestmakeNamespaceTest(short nodeType, String prefix)
Make a NamespaceTest, using this element as the context for namespace resolution
NameTestmakeNameTest(short nodeType, String qname, boolean useDefault)
Make a NameTest, using this element as the context for namespace resolution
StaticContextmakeRuntimeContext(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
StringtoString()
String representation for diagnostics

Constructor Detail

ExpressionContext

public ExpressionContext(StyleElement styleElement)

Method Detail

allowsKeyFunction

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

bindVariable

public Binding bindVariable(int fingerprint)
Bind a variable to an object that can be used to refer to it

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

forwardsCompatibleModeIsEnabled

public boolean forwardsCompatibleModeIsEnabled()
Determine whether forwards-compatible mode is enabled

getBaseURI

public 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.

getExternalJavaClass

public Class getExternalJavaClass(String uri)
Get an external Java class corresponding to a given namespace prefix, if there is one.

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.

getFingerprint

public int getFingerprint(String qname, boolean useDefault)
Get a fingerprint for a name, using this as the context for namespace resolution

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

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

UNKNOWN: useDefault Defines the action when there is no prefix. If true, use the default namespace URI (as for element names). If false, use no namespace URI (as for attribute names).

getLineNumber

public int getLineNumber()
Get the line number of the expression within its containing entity Returns -1 if no line number is available

getStyleSheetFunction

public Function getStyleSheetFunction(int fingerprint)

getSystemId

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

getURIForPrefix

public String getURIForPrefix(String prefix)
Get the URI for a prefix, using this Element as the context for namespace resolution

Parameters: prefix The prefix

UNKNOWN: XPathxception if the prefix is not declared

getVersion

public String getVersion()
Get the effective XSLT version in this region of the stylesheet

isElementAvailable

public boolean isElementAvailable(String qname)
Determine if an extension element is available

Throws: XPathException if the name is invalid or the prefix is not declared

isExtensionNamespace

public boolean isExtensionNamespace(short uriCode)
Determine whether a given URI code identifies an extension element namespace

isFunctionAvailable

public boolean isFunctionAvailable(String qname)
Determine if a function is available

makeNameCode

public final int makeNameCode(String qname, boolean useDefault)
Make a NameCode, using this Element as the context for namespace resolution

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

UNKNOWN: useDefault Defines the action when there is no prefix. If true, use the default namespace URI (as for element names). If false, use no namespace URI (as for attribute names).

makeNamespaceTest

public NamespaceTest makeNamespaceTest(short nodeType, String prefix)
Make a NamespaceTest, using this element as the context for namespace resolution

makeNameTest

public NameTest makeNameTest(short nodeType, String qname, boolean useDefault)
Make a NameTest, using this element as the context for namespace resolution

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

toString

public String toString()
String representation for diagnostics