net.sf.saxon.xpath

Class JAXPXPathStaticContext

java.lang.Object

net.sf.saxon.sxpath.AbstractStaticContext

net.sf.saxon.xpath.JAXPXPathStaticContext

All Implemented Interfaces:

StaticContext, NamespaceResolver

public class JAXPXPathStaticContext
extends AbstractStaticContext
implements NamespaceResolver

A JAXPXPathStaticContext provides a context for parsing an XPath expression in a context other than a stylesheet. In particular, it is used to support the JAXP 1.3 XPath API. The JAXP API does not actually expose the StaticContext object directly; rather, the static context (namespaces, variables, and functions) is manipulated through the XPath object, implemented in Saxon by the XPathEvaluator

Field Summary

Fields inherited from class net.sf.saxon.sxpath.AbstractStaticContext

usingDefaultFunctionLibrary

Constructor Summary

Constructors

Constructor and Description
JAXPXPathStaticContext(Configuration config) Create a JAXPXPathStaticContext using a specific Configuration.

Method Summary

Methods

Modifier and Type	Method and Description
Expression	bindVariable(StructuredQName qName) Bind a variable used in an XPath Expression to the XSLVariable element in which it is declared.
Set<String>	getImportedSchemaNamespaces() Get the set of imported schemas
NamespaceContext	getNamespaceContext() Get the NamespaceContext that was set using setNamespaceContext(javax.xml.namespace.NamespaceContext)
NamespaceResolver	getNamespaceResolver() Get a namespace resolver to resolve the namespaces declared in this static context.
SlotManager	getStackFrameMap() Get the stack frame map containing the slot number allocations for the variables declared in this static context
String	getURIForPrefix(String prefix, boolean useDefault) Get the namespace URI corresponding to a given prefix.
XPathFunctionResolver	getXPathFunctionResolver()
XPathVariableResolver	getXPathVariableResolver() Get the XPathVariableResolver
void	importSchema(Source source) Import a schema.
boolean	isImportedSchema(String namespace) Determine whether a Schema for a given target namespace has been imported.
Iterator<String>	iteratePrefixes() Get an iterator over all the prefixes declared in this namespace context.
void	setNamespaceContext(NamespaceContext context) Supply the NamespaceContext used to resolve namespaces.
void	setXPathFunctionResolver(XPathFunctionResolver xPathFunctionResolver)
void	setXPathVariableResolver(XPathVariableResolver resolver) Set an XPathVariableResolver.

Methods inherited from class net.sf.saxon.sxpath.AbstractStaticContext

addFunctionLibrary, declareCollation, getConfiguration, getContainingLocation, getDecimalFormatManager, getDefaultCollationName, getDefaultElementNamespace, getDefaultFunctionNamespace, getFunctionLibrary, getHostLanguage, getKeyManager, getPackageData, getRequiredContextItemType, getStaticBaseURI, getSystemId, getXPathVersion, isInBackwardsCompatibleMode, issueWarning, makeEarlyEvaluationContext, makeRetainedStaticContext, setBackwardsCompatibilityMode, setBaseURI, setConfiguration, setContainingLocation, setDecimalFormatManager, setDefaultCollationName, setDefaultElementNamespace, setDefaultFunctionLibrary, setDefaultFunctionNamespace, setFunctionLibrary, setPackageData, setSchemaAware, setXPathLanguageLevel

Methods inherited from class java.lang.Object

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

Constructor Detail

JAXPXPathStaticContext

public JAXPXPathStaticContext(Configuration config)

Create a JAXPXPathStaticContext using a specific Configuration.

Parameters:

config - the Configuration. For schema-aware XPath expressions, this must be an EnterpriseConfiguration.

Method Detail

setNamespaceContext

public void setNamespaceContext(NamespaceContext context)

Supply the NamespaceContext used to resolve namespaces.

getNamespaceContext

public NamespaceContext getNamespaceContext()

Get the NamespaceContext that was set using setNamespaceContext(javax.xml.namespace.NamespaceContext)

getStackFrameMap

public SlotManager getStackFrameMap()

Get the stack frame map containing the slot number allocations for the variables declared in this static context

setXPathVariableResolver

public void setXPathVariableResolver(XPathVariableResolver resolver)

Set an XPathVariableResolver. This is used to resolve variable references if no variable has been explicitly declared.

Parameters:

resolver - A JAXP 1.3 XPathVariableResolver

getXPathVariableResolver

public XPathVariableResolver getXPathVariableResolver()

Get the XPathVariableResolver

setXPathFunctionResolver

public void setXPathFunctionResolver(XPathFunctionResolver xPathFunctionResolver)

getXPathFunctionResolver

public XPathFunctionResolver getXPathFunctionResolver()

getNamespaceResolver

public NamespaceResolver getNamespaceResolver()

Description copied from interface: StaticContext

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

Specified by:

getNamespaceResolver in interface StaticContext

Returns:

a namespace resolver.

getURIForPrefix

public String getURIForPrefix(String prefix,
                     boolean useDefault)

Get the namespace URI corresponding to a given prefix. Return null if the prefix is not in scope. This method searches any namespace context supplied using setNamespaceContext(javax.xml.namespace.NamespaceContext).

Specified by:

getURIForPrefix in interface NamespaceResolver

Parameters:

prefix - the namespace prefix

useDefault - true if the default namespace for elements and types is to be used when the prefix is ""

Returns:

the uri for the namespace, or null if the prefix is not in scope. Return "" if the prefix maps to the null namespace.

iteratePrefixes

public Iterator<String> iteratePrefixes()

Get an iterator over all the prefixes declared in this namespace context. This method is implemented only in the case where the NamespaceContext supplied using setNamespaceContext(javax.xml.namespace.NamespaceContext) is an instance of Saxon's NamespaceResolver class. In other cases the method throws an UnsupportedOperationException

Specified by:

iteratePrefixes in interface NamespaceResolver

Returns:

an iterator over all the inscope namespace prefixes, if available

Throws:

UnsupportedOperationException - if the NamespaceContext object is not a NamespaceResolver.

bindVariable

public final Expression bindVariable(StructuredQName qName)
                              throws XPathException

Bind a variable used in an XPath Expression to the XSLVariable element in which it is declared. This method is provided for use by the XPath parser, and it should not be called by the user of the API.

Specified by:

bindVariable in interface StaticContext

Parameters:

qName -

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 no VariableResolver has been supplied.

importSchema

public void importSchema(Source source)
                  throws SchemaException

Import a schema. This is possible only if Saxon-EE is being used, and if the Configuration is a EnterpriseConfiguration. Having imported a schema, the types defined in that schema become part of the static context.

Parameters:

source - A Source object identifying the schema document to be loaded

Throws:

SchemaException - if the schema contained in this document is invalid

UnsupportedOperationException - if the configuration is not schema-aware

isImportedSchema

public boolean isImportedSchema(String namespace)

Determine 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).

Specified by:

isImportedSchema in interface StaticContext

Parameters:

namespace - the target namespace in question

Returns:

true if schema components for the given namespace have been imported into the schema-aware configuration

getImportedSchemaNamespaces

public Set<String> getImportedSchemaNamespaces()

Get the set of imported schemas

Specified by:

getImportedSchemaNamespaces in interface StaticContext

Returns:

a Set, the set of URIs representing the names of imported schemas