net.sf.saxon.expr

Interface StaticContext

All Known Subinterfaces:

XPathStaticContext, XSLTStaticContext

All Known Implementing Classes:

AbstractStaticContext, ExpressionContext, IndependentContext, JAXPXPathStaticContext, QueryLibrary, QueryLibraryImpl, QueryModule, SchemaElement.XPathStaticContext, TextValueTemplateContext, UseWhenStaticContext

public interface StaticContext

A StaticContext contains the information needed while an expression or pattern is being parsed. The information is also sometimes needed at run-time.

Method Summary

Modifier and Type	Method and Description
Expression	bindVariable(StructuredQName qName) Bind a variable used in this expression to the Binding object in which it is declared
Configuration	getConfiguration() Get the system configuration
Location	getContainingLocation() Get the containing location.
DecimalFormatManager	getDecimalFormatManager() Get a DecimalFormatManager to resolve the names of decimal formats used in calls to the format-number() function.
java.lang.String	getDefaultCollationName() Get the name of the default collation.
java.lang.String	getDefaultElementNamespace() Get the default XPath namespace for elements and types
java.lang.String	getDefaultFunctionNamespace() Get the default function namespace
FunctionLibrary	getFunctionLibrary() Get the function library containing all the in-scope functions available in this static context
java.util.Set<java.lang.String>	getImportedSchemaNamespaces() Get the set of imported schemas
KeyManager	getKeyManager() Get the KeyManager, containing definitions of keys available for use.
NamespaceResolver	getNamespaceResolver() Get a namespace resolver to resolve the namespaces declared in this static context.
PackageData	getPackageData() Get information about the containing package (unit of compilation)
ItemType	getRequiredContextItemType() Get the required type of the context item.
java.lang.String	getStaticBaseURI() Get the static base URI, for resolving any relative URI's used in the expression.
java.lang.String	getSystemId() Get the System ID of the container of the expression.
int	getXPathVersion() Get the XPath language level supported, as an integer (being the actual version number times ten).
boolean	isImportedSchema(java.lang.String namespace) Ask whether a Schema for a given target namespace has been imported.
boolean	isInBackwardsCompatibleMode() Determine whether backwards compatibility mode is used
void	issueWarning(java.lang.String message, Location locator) Issue a compile-time warning.
XPathContext	makeEarlyEvaluationContext() Construct a dynamic context for early evaluation of constant subexpressions.
RetainedStaticContext	makeRetainedStaticContext() Construct a RetainedStaticContext, which extracts information from this StaticContext to provide the subset of static context information that is potentially needed during expression evaluation
ItemType	resolveTypeAlias(StructuredQName typeName) Get type alias.

Method Detail

getConfiguration

Configuration getConfiguration()

Get the system configuration

Returns:

the Saxon configuration

getPackageData

PackageData getPackageData()

Get information about the containing package (unit of compilation)

Returns:

the package data

makeEarlyEvaluationContext

XPathContext makeEarlyEvaluationContext()

Construct a dynamic context for early evaluation of constant subexpressions.

Returns:

a newly constructed dynamic context

makeRetainedStaticContext

RetainedStaticContext makeRetainedStaticContext()

Construct a RetainedStaticContext, which extracts information from this StaticContext to provide the subset of static context information that is potentially needed during expression evaluation

Returns:

a RetainedStaticContext object: either a newly created one, or one that is reused from a previous invocation.

getContainingLocation

Location getContainingLocation()

Get the containing location. This is location information relevant to an expression or query as a whole. In the case of an XPath expression held in a node of an XML document, it will provide the location of that node. In the case of a query held in a file, it contains the location of the file (in its systemId property). The method does NOT provide fine-grained location information for each contained subexpression. The location that is returned should be immutable for the duration of parsing of an XPath expression or query.

Returns:

the containing location

issueWarning

void issueWarning(java.lang.String message,
                  Location locator)

Issue a compile-time warning.

Parameters:

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

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

getSystemId

java.lang.String getSystemId()

Get the System ID of the container of the expression. This is the containing entity (file) and is therefore useful for diagnostics. Use getBaseURI() to get the base URI, which may be different.

Returns:

the system ID

getStaticBaseURI

java.lang.String getStaticBaseURI()

Get the static base URI, for resolving any relative URI's used in the expression. Used by the document(), doc(), resolve-uri(), and base-uri() functions. May return null if the base URI is not known.

Returns:

the static base URI, or null if not known

bindVariable

Expression bindVariable(StructuredQName qName)
                 throws XPathException

Bind a variable used in this expression to the Binding object in which it is declared

Parameters:

qName - The name of the variable

Returns:

an expression representing the variable reference, This will often be a VariableReference, suitably initialized to refer to the corresponding variable declaration, but in general it can be any expression which returns the variable's value when evaluated.

Throws:

XPathException - if the variable cannot be bound (has not been declared)

getFunctionLibrary

FunctionLibrary getFunctionLibrary()

Get the function library containing all the in-scope functions available in this static context

Returns:

the function library

getDefaultCollationName

java.lang.String getDefaultCollationName()

Get the name of the default collation.

Returns:

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

getDefaultElementNamespace

java.lang.String getDefaultElementNamespace()

Get the default XPath namespace for elements and types

Returns:

the default namespace, or NamespaceConstant.NULL for the non-namespace

getDefaultFunctionNamespace

java.lang.String getDefaultFunctionNamespace()

Get the default function namespace

Returns:

the default namespace for function names

isInBackwardsCompatibleMode

boolean isInBackwardsCompatibleMode()

Determine whether backwards compatibility mode is used

Returns:

true if 1.0 compaibility mode is in force.

isImportedSchema

boolean isImportedSchema(java.lang.String namespace)

Ask whether a Schema for a given target namespace has been imported. Note that the in-scope element declarations, attribute declarations and schema types are the types registered with the (schema-aware) configuration, provided that their namespace URI is registered in the static context as being an imported schema namespace. (A consequence of this is that within a Configuration, there can only be one schema for any given namespace, including the null namespace).

Parameters:

namespace - the target namespace in question

Returns:

true if the given namespace has been imported

getImportedSchemaNamespaces

java.util.Set<java.lang.String> getImportedSchemaNamespaces()

Get the set of imported schemas

Returns:

a Set, the set of URIs representing the target namespaces of imported schemas, using the zero-length string to denote the "null" namespace.

getNamespaceResolver

NamespaceResolver getNamespaceResolver()

Get a namespace resolver to resolve the namespaces declared in this static context.

Returns:

a namespace resolver.

getRequiredContextItemType

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.

Returns:

the required type of the context item

Since:

9.3

getDecimalFormatManager

DecimalFormatManager getDecimalFormatManager()

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

Returns:

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

Since:

9.2

getXPathVersion

int getXPathVersion()

Get the XPath language level supported, as an integer (being the actual version number times ten). From

Returns:

the XPath language level; the return value will be either 20, 30, or 31

Since:

9.7

getKeyManager

KeyManager getKeyManager()

Get the KeyManager, containing definitions of keys available for use.

Returns:

the KeyManager. This is used to resolve key names, both explicit calls on key() used in XSLT, and system-generated calls on key() which may also appear in XQuery and XPath

resolveTypeAlias

ItemType resolveTypeAlias(StructuredQName typeName)

Get type alias. This is a Saxon extension. A type alias is a QName which can be used as a shorthand for an itemtype, using the syntax ~typename anywhere that an item type is permitted.

Parameters:

typeName - the name of the type alias

Returns:

the corresponding item type, if the name is recognised; otherwise null.