net.sf.saxon.style

Class XSLGlobalVariable

java.lang.Object

net.sf.saxon.tree.linked.NodeImpl

net.sf.saxon.tree.linked.ParentNodeImpl

net.sf.saxon.tree.linked.ElementImpl

net.sf.saxon.style.StyleElement

net.sf.saxon.style.XSLGlobalVariable

All Implemented Interfaces:

javax.xml.transform.Source, javax.xml.transform.SourceLocator, GroundedValue, Item, MutableNodeInfo, NamespaceResolver, NodeInfo, Sequence, Location, StylesheetComponent, SteppingNode<NodeImpl>, SiblingCountingNode, org.xml.sax.Locator

Direct Known Subclasses:

XSLGlobalParam

public class XSLGlobalVariable
extends StyleElement
implements StylesheetComponent

Handler for xsl:variable elements appearing as a child of xsl:stylesheet.

The xsl:variable element has mandatory attribute name and optional attribute select (inter alia)

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.saxon.style.StyleElement

StyleElement.OnFailure

Field Summary

Fields

Modifier and Type	Field and Description
protected GlobalVariable	compiledVariable
protected boolean	redundant
protected SourceBinding	sourceBinding

Fields inherited from class net.sf.saxon.style.StyleElement

ACTION_COMPILE, ACTION_FIXUP, ACTION_OPTIMIZE, ACTION_PROCESS_ATTRIBUTES, ACTION_TYPECHECK, ACTION_VALIDATE, actionsCompleted, defaultCollationName, defaultMode, defaultXPathNamespace, expandText, extensionNamespaces, reportingCircumstances, staticContext, validationError, version

Fields inherited from class net.sf.saxon.tree.linked.NodeImpl

NODE_LETTER

Fields inherited from interface net.sf.saxon.om.NodeInfo

IS_DTD_TYPE, IS_NILLED

Constructor Summary

Constructors

Constructor and Description
XSLGlobalVariable()

Method Summary

Modifier and Type	Method and Description
void	checkCompatibility(Component component) Check the compatibility of this component with another component that it is overriding
void	compileDeclaration(Compilation compilation, ComponentDeclaration decl) Compile.
void	fixupReferences() Fix up references from XPath expressions.
void	generateByteCode(Optimizer opt) Generate byte code if appropriate
Actor	getActor() Get the corresponding Procedure object that results from the compilation of this StylesheetProcedure
SourceBinding	getBindingInformation(StructuredQName name) Ask whether this element contains a binding for a variable with a given name; and if it does, return the source binding information
GlobalVariable	getCompiledVariable()
StructuredQName	getObjectName() Get a name identifying the object of the expression, for example a function name, template name, variable name, key name, element name, etc.
protected java.util.EnumSet<SourceBinding.BindingProperty>	getPermittedAttributes()
SequenceType	getRequiredType() Get the static type of the variable.
SlotManager	getSlotManager() Get the SlotManager associated with this stylesheet construct.
SourceBinding	getSourceBinding() Get the source binding object that holds information about the declared variable.
SymbolicName	getSymbolicName() Get the symbolic name of the component, that is, the combination of the component kind and the qualified name
StructuredQName	getVariableQName()
void	index(ComponentDeclaration decl, PrincipalStylesheetModule top) Method supplied by declaration elements to add themselves to a stylesheet-level index
protected void	initializeBinding(GlobalVariable var) Initialize - common code called from the compile() method of all subclasses
boolean	isAssignable() Ask whether the global variable is declared with assignable="yes"
boolean	isDeclaration() Determine whether this node is a declaration.
boolean	isGlobal() Test whether this is a global variable or parameter
boolean	isInstruction() Determine whether this node is an instruction.
boolean	mayContainSequenceConstructor() Determine whether this type of element is allowed to contain a template-body
void	optimize(ComponentDeclaration declaration) Optimize the stylesheet construct
void	postValidate() Hook to allow additional validation of a parent element immediately after its children have been validated.
void	prepareAttributes() Set the attribute list for the element.
void	setRedundant(boolean redundant) Mark this global variable as redundant, typically because it is overridden by another global variable of the same name, or because there are no references to it
void	validate(ComponentDeclaration decl) Check that the stylesheet element is valid.

Methods inherited from class net.sf.saxon.style.StyleElement

allocateLocation, bindLocalVariable, bindVariable, checkEmpty, checkTopLevel, checkUnknownAttribute, compile, compileError, compileError, compileError, compileError, compileError, compileError, compileErrorInAttribute, compileSequenceConstructor, compileSequenceConstructor, compileWarning, compileWarning, compileWarning, generateId, getAttributeValue, getBaseURI, getCompilation, getConfiguration, getContainingPackage, getContainingSlotManager, getDeclaredVisibility, getDefaultCollationName, getDefaultXPathNamespace, getNamespaceResolver, getPackageData, getPrincipalStylesheetModule, getProperties, getSchemaType, getStaticContext, getStaticContext, getTypeAnnotation, getUsedPackage, getVisibility, getWithParamInstructions, getXslOriginal, hasImplicitBinding, invalidAttribute, isExtensionAttributeAllowed, isExtensionNamespace, isPermittedChild, isSchemaAware, issueWarning, issueWarning, isTopLevel, isWithinDeclaredStreamableConstruct, makeAttributeValueTemplate, makeExpression, makeExpressionVisitor, makeQName, makeRetainedStaticContext, makeSequenceType, markTailCalls, mayContainFallback, mayContainParam, processAllAttributes, processBooleanAttribute, processStandardAttributes, processVersionAttribute, reportAbsence, requireSyntaxExtensions, seesAvuncularVariables, setCompilation, setObjectName, setValidationError, substituteFor, typeCheck, typeCheck, validateChildren, validateSubtree, validateValidationAttribute

Methods inherited from class net.sf.saxon.tree.linked.ElementImpl

addAttribute, addNamespace, addNamespace, attributes, copy, delete, fixupInsertedNamespaces, generateId, getAllNamespaces, getAttributeValue, getColumnNumber, getDeclaredNamespaces, getLineNumber, getNodeKind, getNodeName, getRoot, getSchemaType, getSystemId, getURIForPrefix, initialise, isId, isIdref, isInScopeNamespace, isNilled, iteratePrefixes, removeAttribute, removeNamespace, removeTypeAnnotation, rename, replaceStringValue, setAttributeInfo, setAttributes, setLocation, setNamespaceMap, setNilled, setNodeName, setSystemId, setTypeAnnotation

Methods inherited from class net.sf.saxon.tree.linked.ParentNodeImpl

addChild, children, compact, getFirstChild, getLastChild, getNthChild, getNumberOfChildren, getRawSequenceNumber, getSequenceNumber, getStringValue, getStringValueCS, hasChildNodes, insertChildren, iterateChildren, removeChild, replaceChildrenAt, setChildren, setRawSequenceNumber

Methods inherited from class net.sf.saxon.tree.linked.NodeImpl

atomize, compareOrder, effectiveBooleanValue, equals, getDisplayName, getFingerprint, getLocalPart, getNamePool, getNextInDocument, getNextSibling, getParent, getPhysicalRoot, getPrefix, getPreviousInDocument, getPreviousSibling, getRawParent, getSiblingPosition, getSuccessorElement, getTreeInfo, getURI, hasFingerprint, head, insertSiblings, isDeleted, iterateAxis, iterateAxis, newBuilder, replace, saveLocation, setRawParent, setSiblingPosition

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.om.NodeInfo

children, equals, getGenre, getPublicId, hashCode, isSameNodeInfo, isStreamed, toShortString

Methods inherited from interface net.sf.saxon.om.Item

getLength, itemAt, iterate, reduce, subsequence, toGroundedValue

Methods inherited from interface net.sf.saxon.om.GroundedValue

asIterable, concatenate, containsNode, materialize

Methods inherited from interface net.sf.saxon.om.Sequence

makeRepeatable

Field Detail

sourceBinding

protected SourceBinding sourceBinding

compiledVariable

protected GlobalVariable compiledVariable

redundant

protected boolean redundant

Constructor Detail

XSLGlobalVariable

public XSLGlobalVariable()

Method Detail

getSourceBinding

public SourceBinding getSourceBinding()

Get the source binding object that holds information about the declared variable.

Returns:

the source binding

getVariableQName

public StructuredQName getVariableQName()

getObjectName

public StructuredQName getObjectName()

Description copied from class: StyleElement

Get a name identifying the object of the expression, for example a function name, template name, variable name, key name, element name, etc. This is used only where the name is known statically. If there is no name, the value will be null.

Overrides:

getObjectName in class StyleElement

Returns:

the name of the object declared in this element, if any

mayContainSequenceConstructor

public boolean mayContainSequenceConstructor()

Determine whether this type of element is allowed to contain a template-body

Overrides:

mayContainSequenceConstructor in class StyleElement

Returns:

true: yes, it may contain a template-body

isGlobal

public boolean isGlobal()

Test whether this is a global variable or parameter

Returns:

true if this is global

postValidate

public void postValidate()
                  throws XPathException

Hook to allow additional validation of a parent element immediately after its children have been validated.

Overrides:

postValidate in class StyleElement

Throws:

XPathException - if any error is found during post-traversal validation

getCompiledVariable

public GlobalVariable getCompiledVariable()

getPermittedAttributes

protected java.util.EnumSet<SourceBinding.BindingProperty> getPermittedAttributes()

getActor

public Actor getActor()
               throws XPathException

Get the corresponding Procedure object that results from the compilation of this StylesheetProcedure

Specified by:

getActor in interface StylesheetComponent

Returns:

the compiled ComponentCode

Throws:

XPathException - if generating the ComponentBody fails

getSymbolicName

public SymbolicName getSymbolicName()

Description copied from interface: StylesheetComponent

Get the symbolic name of the component, that is, the combination of the component kind and the qualified name

Specified by:

getSymbolicName in interface StylesheetComponent

Returns:

the component's symbolic name

checkCompatibility

public void checkCompatibility(Component component)

Description copied from interface: StylesheetComponent

Check the compatibility of this component with another component that it is overriding

Specified by:

checkCompatibility in interface StylesheetComponent

Parameters:

component - the overridden component

getBindingInformation

public SourceBinding getBindingInformation(StructuredQName name)

Ask whether this element contains a binding for a variable with a given name; and if it does, return the source binding information

Overrides:

getBindingInformation in class StyleElement

Parameters:

name - the variable name

Returns:

the binding information if this element binds a variable of this name; otherwise null

prepareAttributes

public void prepareAttributes()

Description copied from class: StyleElement

Set the attribute list for the element. This is called to process the attributes (note the distinction from processAttributes in the superclass). Must be supplied in a subclass

Specified by:

prepareAttributes in class StyleElement

index

public void index(ComponentDeclaration decl,
                  PrincipalStylesheetModule top)
           throws XPathException

Description copied from class: StyleElement

Method supplied by declaration elements to add themselves to a stylesheet-level index

Overrides:

index in class StyleElement

Parameters:

decl - the Declaration being indexed. (This corresponds to the StyleElement object except in cases where one module is imported several times with different precedence.)

top - represents the outermost XSLStylesheet or XSLPackage element

Throws:

XPathException - if any error is encountered

validate

public void validate(ComponentDeclaration decl)
              throws XPathException

Description copied from class: StyleElement

Check that the stylesheet element is valid. This is called once for each element, after the entire tree has been built. As well as validation, it can perform first-time initialisation. The default implementation does nothing; it is normally overriden in subclasses.

Overrides:

validate in class StyleElement

Parameters:

decl - the declaration to be validated

Throws:

XPathException - if any error is found during validation

isAssignable

public boolean isAssignable()

Ask whether the global variable is declared with assignable="yes"

Returns:

true if assignabl="yes" was specified

isDeclaration

public boolean isDeclaration()

Determine whether this node is a declaration.

Overrides:

isDeclaration in class StyleElement

Returns:

true - a global variable is a declaration

isInstruction

public boolean isInstruction()

Determine whether this node is an instruction.

Overrides:

isInstruction in class StyleElement

Returns:

false - a global variable is not an instruction

getRequiredType

public SequenceType getRequiredType()

Get the static type of the variable. This is the declared type, unless the value is statically known and constant, in which case it is the actual type of the value.

Returns:

the declared or inferred static type of the variable

fixupReferences

public void fixupReferences()
                     throws XPathException

Description copied from class: StyleElement

Fix up references from XPath expressions. Overridden for function declarations and variable declarations

Overrides:

fixupReferences in class StyleElement

Throws:

XPathException - if any references cannot be fixed up.

compileDeclaration

public void compileDeclaration(Compilation compilation,
                               ComponentDeclaration decl)
                        throws XPathException

Compile. This method ensures space is available for local variables declared within this global variable

Overrides:

compileDeclaration in class StyleElement

Parameters:

compilation - the compilation episode

decl - the containing top-level declaration, for example xsl:function or xsl:template

Throws:

XPathException - if compilation fails

initializeBinding

protected void initializeBinding(GlobalVariable var)

Initialize - common code called from the compile() method of all subclasses

Parameters:

var - the representation of the variable declaration in the compiled executable

getSlotManager

public SlotManager getSlotManager()

Get the SlotManager associated with this stylesheet construct. The SlotManager contains the information needed to manage the local stack frames used by run-time instances of the code.

Specified by:

getSlotManager in interface StylesheetComponent

Returns:

the associated SlotManager object

optimize

public void optimize(ComponentDeclaration declaration)
              throws XPathException

Optimize the stylesheet construct

Specified by:

optimize in interface StylesheetComponent

Parameters:

declaration - the declaration of this variable

Throws:

XPathException

setRedundant

public void setRedundant(boolean redundant)

Mark this global variable as redundant, typically because it is overridden by another global variable of the same name, or because there are no references to it

Parameters:

redundant - true if this variable is redundant, otherwise false

generateByteCode

public void generateByteCode(Optimizer opt)

Generate byte code if appropriate

Specified by:

generateByteCode in interface StylesheetComponent

Parameters:

opt - the optimizer