net.sf.saxon.sxpath
Class AbstractStaticContext

java.lang.Object
  net.sf.saxon.sxpath.AbstractStaticContext

All Implemented Interfaces:

StaticContext

Direct Known Subclasses:

IndependentContext, JAXPXPathStaticContext, UseWhenStaticContext

public abstract class AbstractStaticContext
extends Object
implements StaticContext

An abstract and configurable implementation of the StaticContext interface, which defines the static context of an XPath expression.

This class implements those parts of the functionality of a static context that tend to be common to most implementations: simple-valued properties such as base URI and default element namespace; availability of the standard function library; and support for collations.

Field Summary

protected boolean

usingDefaultFunctionLibrary

Constructor Summary

AbstractStaticContext()

Method Summary

protected void	addFunctionLibrary(FunctionLibrary library) Add a function library to the list of function libraries
void	declareCollation(String name, StringCollator comparator, boolean isDefault) Declare a named collation
String	getBaseURI() Get the Base URI, for resolving any relative URI's used in the expression.
StringCollator	getCollation(String name) Get a named collation.
int	getColumnNumber() Return the character position where the current document event ends.
Configuration	getConfiguration() Get the system configuration
DecimalFormatManager	getDecimalFormatManager() Get a DecimalFormatManager to resolve the names of decimal formats used in calls to the format-number() function.
String	getDefaultCollationName() Get the name of the default collation.
String	getDefaultElementNamespace() Get the default namespace URI for elements and types Return NamespaceConstant.NULL (that is, the zero-length string) for the non-namespace
String	getDefaultFunctionNamespace() Get the default function namespace.
FunctionLibrary	getFunctionLibrary() Get the function library containing all the in-scope functions available in this static context.
int	getHostLanguage() Get the host language (XSLT, XQuery, XPath) used to implement the code in this container
int	getLineNumber() Get the line number of the expression within that container.
LocationMap	getLocationMap() Get the location map.
LocationProvider	getLocationProvider() Get the LocationProvider allowing location identifiers to be resolved.
NamePool	getNamePool() Get the NamePool used for compiling expressions
String	getPublicId() Return the public identifier.
ItemType	getRequiredContextItemType() Get the required type of the context item.
String	getSystemId() Get the system ID of the container of the expression.
DecimalValue	getXPathLanguageLevel() Get the XPath language level supported, as a string.
boolean	isAllowedBuiltInType(BuiltInAtomicType type) Determine whether a built-in type is available in this context.
boolean	isInBackwardsCompatibleMode() Determine whether Backwards Compatible Mode is used
boolean	isSchemaAware() Ask whether this static context is schema-aware
void	issueWarning(String s, SourceLocator locator) Issue a compile-time warning.
XPathContext	makeEarlyEvaluationContext() Construct a dynamic context for early evaluation of constant subexpressions
void	setBackwardsCompatibilityMode(boolean option) Set XPath 1.0 backwards compatibility mode on or off
void	setBaseURI(String baseURI) Set the base URI in the static context
protected void	setConfiguration(Configuration config) Set the Configuration.
void	setDecimalFormatManager(DecimalFormatManager manager) Set the DecimalFormatManager used to resolve the names of decimal formats used in calls to the format-number() function.
void	setDefaultElementNamespace(String uri) Set the default namespace for elements and types
protected void	setDefaultFunctionLibrary() Initialize the default function library for XPath.
void	setDefaultFunctionNamespace(String uri) Set the default function namespace
void	setFunctionLibrary(FunctionLibraryList lib) Set the function library to be used
void	setLocationMap(LocationMap locationMap) Set the location map, which is used for translating location identifiers into URIs and line numbers
void	setSchemaAware(boolean aware) Say whether this static context is schema-aware
void	setXPathLanguageLevel(DecimalValue level) Set the XPath language level supported, as a string.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.saxon.expr.StaticContext

bindVariable, getImportedSchemaNamespaces, getNamespaceResolver, getURIForPrefix, isImportedSchema

Field Detail

usingDefaultFunctionLibrary

protected boolean usingDefaultFunctionLibrary

Constructor Detail

AbstractStaticContext

public AbstractStaticContext()

Method Detail

setConfiguration

protected void setConfiguration(Configuration config)

Set the Configuration. This is protected so it can be used only by subclasses; the configuration will normally be set at construction time

Parameters:

config - the configuration

getConfiguration

public Configuration getConfiguration()

Get the system configuration

Specified by:

getConfiguration in interface StaticContext

Returns:

the Saxon configuration

setSchemaAware

public void setSchemaAware(boolean aware)

Say whether this static context is schema-aware

Parameters:

aware - true if this static context is schema-aware

isSchemaAware

public boolean isSchemaAware()

Ask whether this static context is schema-aware

Specified by:

isSchemaAware in interface StaticContext

Returns:

true if this context is schema-aware

setDefaultFunctionLibrary

protected final void setDefaultFunctionLibrary()

Initialize the default function library for XPath. This can be overridden using setFunctionLibrary().

addFunctionLibrary

protected final void addFunctionLibrary(FunctionLibrary library)

Add a function library to the list of function libraries

Parameters:

library - the function library to be added

getHostLanguage

public int getHostLanguage()

Get the host language (XSLT, XQuery, XPath) used to implement the code in this container

Returns:

the value Configuration.XPATH

makeEarlyEvaluationContext

public XPathContext makeEarlyEvaluationContext()

Construct a dynamic context for early evaluation of constant subexpressions

Specified by:

makeEarlyEvaluationContext in interface StaticContext

Returns:

a newly constructed dynamic context

getLocationMap

public LocationMap getLocationMap()

Description copied from interface: StaticContext

Get the location map. This is a mapping from short location ids held with each expression or subexpression, to a fully-resolved location in a source stylesheet or query.

Specified by:

getLocationMap in interface StaticContext

Returns:

the location map

setLocationMap

public void setLocationMap(LocationMap locationMap)

Set the location map, which is used for translating location identifiers into URIs and line numbers

Parameters:

locationMap - the location map to be used

setBaseURI

public void setBaseURI(String baseURI)

Set the base URI in the static context

Parameters:

baseURI - the base URI of the expression

getBaseURI

public String getBaseURI()

Get the Base URI, for resolving any relative URI's used in the expression. Used by the document() function, resolve-uri(), etc.

Specified by:

getBaseURI in interface StaticContext

Returns:

"" if no base URI has been set

getFunctionLibrary

public FunctionLibrary getFunctionLibrary()

Get the function library containing all the in-scope functions available in this static context. This method is called by the XPath parser when binding a function call in the XPath expression to an implementation of the function.

Specified by:

getFunctionLibrary in interface StaticContext

Returns:

the function library

setFunctionLibrary

public void setFunctionLibrary(FunctionLibraryList lib)

Set the function library to be used

Parameters:

lib - the function library

declareCollation

public void declareCollation(String name,
                             StringCollator comparator,
                             boolean isDefault)

Declare a named collation

Parameters:

name - The name of the collation (technically, a URI)

comparator - The StringCollator used to implement the collating sequence

isDefault - True if this is to be used as the default collation

getCollation

public StringCollator getCollation(String name)

Get a named collation.

Specified by:

getCollation in interface StaticContext

Parameters:

name - The name of the required collation. Supply null to get the default collation.

Returns:

the collation identified by the given name, as set previously using declareCollation. Return null if no collation with this name is found.

getDefaultCollationName

public String getDefaultCollationName()

Get the name of the default collation.

Specified by:

getDefaultCollationName in interface StaticContext

Returns:

the name of the default collation; or the name of the codepoint collation if no default collation has been defined

getNamePool

public NamePool getNamePool()

Get the NamePool used for compiling expressions

Specified by:

getNamePool in interface StaticContext

Returns:

the name pool

issueWarning

public void issueWarning(String s,
                         SourceLocator locator)

Issue a compile-time warning. This method is used during XPath expression compilation to output warning conditions. The default implementation writes the message to the error listener registered with the Configuration.

Specified by:

issueWarning in interface StaticContext

Parameters:

s - The warning message. This should not contain any prefix such as "Warning".

locator - the location of the construct in question. May be null.

getSystemId

public String getSystemId()

Get the system ID of the container of the expression. Used to construct error messages.

Specified by:

getSystemId in interface StaticContext

Returns:

"" always

getLineNumber

public int getLineNumber()

Get the line number of the expression within that container. Used to construct error messages.

Specified by:

getLineNumber in interface StaticContext

Returns:

-1 always

getDefaultElementNamespace

public String getDefaultElementNamespace()

Get the default namespace URI for elements and types Return NamespaceConstant.NULL (that is, the zero-length string) for the non-namespace

Specified by:

getDefaultElementNamespace in interface StaticContext

Returns:

the default namespace for elements and type

setDefaultElementNamespace

public void setDefaultElementNamespace(String uri)

Set the default namespace for elements and types

Parameters:

uri - the namespace to be used for unprefixed element and type names. The value "" (or NamespaceConstant.NULL) represents the non-namespace

setDefaultFunctionNamespace

public void setDefaultFunctionNamespace(String uri)

Set the default function namespace

Parameters:

uri - the namespace to be used for unprefixed function names. The value "" (or NamespaceConstant.NULL) represents the non-namespace

getDefaultFunctionNamespace

public String getDefaultFunctionNamespace()

Get the default function namespace. The value "" (or NamespaceConstant.NULL) represents the non-namespace

Specified by:

getDefaultFunctionNamespace in interface StaticContext

Returns:

the default namesapce for functions

setXPathLanguageLevel

public void setXPathLanguageLevel(DecimalValue level)

Set the XPath language level supported, as a string. The current levels supported are 2.0, and 3.0. The default is 2.0. If running XQuery 1.0, the value is "2.0"; if running XQuery 3.0, it is 3.0.

Parameters:

level - the XPath language level

Since:

9.3

getXPathLanguageLevel

public DecimalValue getXPathLanguageLevel()

Get the XPath language level supported, as a string. The current levels supported are "2.0", and "3.0". The default is "2.0". If running XQuery 1.0, the value is "2.0"; if running XQuery 3.0, it is "3.0".

Specified by:

getXPathLanguageLevel in interface StaticContext

Returns:

the XPath language level

Since:

9.3

setBackwardsCompatibilityMode

public void setBackwardsCompatibilityMode(boolean option)

Set XPath 1.0 backwards compatibility mode on or off

Parameters:

option - true if XPath 1.0 compatibility mode is to be set to true; otherwise false

isInBackwardsCompatibleMode

public boolean isInBackwardsCompatibleMode()

Determine whether Backwards Compatible Mode is used

Specified by:

isInBackwardsCompatibleMode in interface StaticContext

Returns:

true if XPath 1.0 compatibility mode is to be set to true; otherwise false

isAllowedBuiltInType

public boolean isAllowedBuiltInType(BuiltInAtomicType type)

Determine whether a built-in type is available in this context. This method caters for differences between host languages as to which set of types are built in.

Specified by:

isAllowedBuiltInType in interface StaticContext

Parameters:

type - the supposedly built-in type. This will always be a type in the XS namespace.

Returns:

true if this type can be used in this static context

setDecimalFormatManager

public void setDecimalFormatManager(DecimalFormatManager manager)

Set the DecimalFormatManager used to resolve the names of decimal formats used in calls to the format-number() function.

Parameters:

manager - the decimal format manager for this static context, or null if no named decimal formats are available in this environment.

getRequiredContextItemType

public ItemType getRequiredContextItemType()

Get the required type of the context item. If no type has been explicitly declared for the context item, an instance of AnyItemType (representing the type item()) is returned.

Specified by:

getRequiredContextItemType in interface StaticContext

Returns:

the required type of the context item

Since:

9.3

getDecimalFormatManager

public DecimalFormatManager getDecimalFormatManager()

Get a DecimalFormatManager to resolve the names of decimal formats used in calls to the format-number() function.

Specified by:

getDecimalFormatManager in interface StaticContext

Returns:

the decimal format manager for this static context, or null if no named decimal formats are available in this environment.

Since:

9.2

getLocationProvider

public LocationProvider getLocationProvider()

Get the LocationProvider allowing location identifiers to be resolved.

Returns:

the LocationProvider that translates location identifiers into URIs and line numbers

getPublicId

public String getPublicId()

Return the public identifier.

The return value is the public identifier of the document entity or of the external parsed entity in which the markup that triggered the event appears.

Returns:

null (always).

See Also:

getSystemId()

getColumnNumber

public int getColumnNumber()

Return the character position where the current document event ends.

Returns:

-1 (no column number is available).

See Also:

getLineNumber()