net.sf.saxon.style
Class XSLVariableDeclaration

java.lang.Object
  net.sf.saxon.tree.linked.NodeImpl
      net.sf.saxon.tree.linked.ElementImpl
          net.sf.saxon.style.StyleElement
              net.sf.saxon.style.XSLGeneralVariable
                  net.sf.saxon.style.XSLVariableDeclaration

All Implemented Interfaces:

Serializable, Source, SourceLocator, LocationProvider, SaxonLocator, PullEvent, Container, VariableDeclaration, FingerprintedNode, Item<NodeInfo>, MutableNodeInfo, NamespaceResolver, NodeInfo, ValueRepresentation<NodeInfo>, StylesheetProcedure, InstructionInfo, SiblingCountingNode, Locator

Direct Known Subclasses:

XSLParam, XSLVariable

public abstract class XSLVariableDeclaration
extends XSLGeneralVariable
implements VariableDeclaration, StylesheetProcedure

Generic class for xsl:variable and xsl:param elements.

See Also:

Serialized Form

Field Summary

protected List

references

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

assignable, compiledVariable, constantText, global, implicitlyRequiredParam, redundant, requiredParam, requiredType, select, slotManager, tunnel

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

ACTION_COMPILE, ACTION_FIXUP, ACTION_OPTIMIZE, ACTION_PROCESS_ATTRIBUTES, ACTION_TYPECHECK, ACTION_VALIDATE, actionsCompleted, defaultCollationName, defaultXPathNamespace, extensionNamespaces, REPORT_ALWAYS, REPORT_IF_INSTANTIATED, REPORT_UNLESS_FALLBACK_AVAILABLE, REPORT_UNLESS_FORWARDS_COMPATIBLE, reportingCircumstances, staticContext, validationError, version, YES_NO

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

NODE_LETTER

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

ALL_NAMESPACES, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES

Constructor Summary

XSLVariableDeclaration()

Method Summary

protected void	addChild(NodeImpl node, int index) Add a child node to this node.
void	compact(int size) Compact the space used by this node
protected AxisIterator	enumerateChildren(NodeTest test) Get an enumeration of the children of this node
protected void	fixupBinding(Binding binding) Notify all variable references of the Binding instruction
void	fixupReferences() Notify all references to this variable of the data type
GeneralVariable	getCompiledVariable() Get the compiled variable
NodeInfo	getFirstChild() Get the first child node of the element
NodeInfo	getLastChild() Get the last child node of the element
protected NodeImpl	getNthChild(int n) Get the nth child node of the element (numbering from 0)
int	getNumberOfChildren() Determine how many children the node has
protected int	getRawSequenceNumber()
abstract SequenceType	getRequiredType() Get the static type of the variable.
protected long	getSequenceNumber() Get the node sequence number (in document order).
SlotManager	getSlotManager() Get the SlotManager associated with this stylesheet construct.
int	getSlotNumber() Get the slot number allocated to this variable (its position in the stackframe)
String	getStringValue() Return the string-value of the node, that is, the concatenation of the character content of all descendent elements and text nodes.
CharSequence	getStringValueCS() Get the value of the item as a CharSequence.
boolean	hasChildNodes() Determine if the node has any children.
protected void	index(Declaration decl, PrincipalStylesheetModule top) Method supplied by declaration elements to add themselves to a stylesheet-level index
void	insertChildren(NodeInfo[] source, boolean atStart, boolean inherit) Insert a sequence of nodes as children of this node.
protected void	insertChildrenAt(NodeInfo[] source, int index, boolean inherit) Insert children before or after a given existing child
boolean	isDeclaration() Ask whether this node is a declaration, that is, a permitted child of xsl:stylesheet (including xsl:include and xsl:import).
boolean	isInstruction() Determine whether this node is an instruction.
void	optimize(Declaration declaration) Optimize the stylesheet construct
void	registerReference(BindingReference ref) Method called by VariableReference to register the variable reference for subsequent fixup
protected void	removeChild(NodeImpl child) Remove a given child
protected void	replaceChildrenAt(NodeInfo[] source, int index, boolean inherit) Replace child at a given index by new children
protected void	setChildren(Object children) Set the children of this node
protected void	setRawSequenceNumber(int seq)
protected void	setReferenceCount(GeneralVariable var) Set the number of references to this variable.
void	setSlotNumber(int slot) Allocate a slot number to this variable
void	validate(Declaration decl) Check that the variable is not already declared, and allocate a slot number

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

allowsAsAttribute, allowsRequired, allowsTunnelAttribute, allowsValue, checkAgainstRequiredType, getConstructType, getReturnedItemType, getVariableDisplayName, getVariableQName, initializeBinding, isAssignable, isGlobal, isRequiredParam, isTunnelParam, mayContainSequenceConstructor, postValidate, prepareAttributes, setRedundant

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

allocateLocationId, allocatePatternSlots, allocateSlots, bindLocalVariable, bindVariable, checkAttributeValue, checkEmpty, checkSortComesFirst, checkTopLevel, checkUnknownAttribute, compile, compileDeclaration, compileError, compileError, compileError, compileError, compileSequenceConstructor, compileWarning, compileWarning, definesExcludedNamespace, definesExtensionElement, fallbackProcessing, forwardsCompatibleModeIsEnabled, getAttributeSets, getAttributeValue, getColumnNumber, getCommonChildItemType, getContainerGranularity, getContainingSlotManager, getContainingStylesheet, getDefaultCollationName, getDefaultXPathNamespace, getEffectiveVersion, getExecutable, getHostLanguage, getLastChildInstruction, getLineNumber, getLocationProvider, getNamespaceResolver, getObjectName, getPreparedStylesheet, getPrincipalStylesheetModule, getProcessorVersion, getProperties, getProperty, getSchemaType, getStaticContext, getSystemId, getTypeAnnotation, getWithParamInstructions, isActionCompleted, isExcludedNamespace, isExplaining, isExtensionNamespace, isPermittedChild, issueWarning, issueWarning, isTopLevel, isXslt30Processor, makeAttributeValueTemplate, makeExpression, makeExpressionVisitor, makeNamespaceContext, makePattern, makeQName, makeSequenceType, makeSortKeys, makeTraceInstruction, markTailCalls, mayContainFallback, mayContainParam, processAllAttributes, processAttributes, processDefaultCollationAttribute, processDefaultXPathNamespaceAttribute, processExcludedNamespaces, processExtensionElementAttribute, processStandardAttributes, processVersionAttribute, reportAbsence, seesAvuncularVariables, setActionCompleted, setObjectName, setValidationError, substituteFor, typeCheck, typeCheck, undeclaredNamespaceError, validateChildren, validateSubtree, xPath10ModeIsEnabled

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

addAttribute, addNamespace, copy, delete, fixupInsertedNamespaces, generateId, getAttributeList, getAttributeValue, getAttributeValue, getBaseURI, getColumnNumber, getDeclaredNamespaces, getDocumentRoot, getLineNumber, getNameCode, getNamespaceList, getNodeKind, getPrefixForURI, getRoot, getSchemaType, getSystemId, getTypeAnnotation, getURIForPrefix, gsetAttributeCollection, initialise, isId, isNilled, iteratePrefixes, removeAttribute, removeTypeAnnotation, rename, replaceStringValue, setAttributeList, setLocation, setNameCode, setNamespaceDeclarations, setNamespaceList, setSystemId, setTypeAnnotation

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

atomize, compareOrder, equals, getConfiguration, getDisplayName, getDocumentNumber, getFingerprint, getLocalPart, getNamePool, getNextInDocument, getNextSibling, getParent, getPhysicalRoot, getPrefix, getPreviousInDocument, getPreviousSibling, getPublicId, getRawParent, getSiblingPosition, getTypedValue, getURI, insertSiblings, isDeleted, isIdref, isSameNodeInfo, iterateAxis, iterateAxis, newBuilder, replace, setRawParent, setSiblingPosition

Methods inherited from class java.lang.Object

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

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

getVariableQName

Methods inherited from interface net.sf.saxon.trace.InstructionInfo

getLineNumber, getSystemId

Methods inherited from interface org.xml.sax.Locator

getColumnNumber, getPublicId

Methods inherited from interface javax.xml.transform.SourceLocator

getColumnNumber, getPublicId

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

hashCode

Field Detail

references

protected List references

Constructor Detail

XSLVariableDeclaration

public XSLVariableDeclaration()

Method Detail

isDeclaration

public boolean isDeclaration()

Ask whether this node is a declaration, that is, a permitted child of xsl:stylesheet (including xsl:include and xsl:import).

Overrides:

isDeclaration in class StyleElement

Returns:

true for this element

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 StylesheetProcedure

Returns:

the associated SlotManager object

getSlotNumber

public int getSlotNumber()

Get the slot number allocated to this variable (its position in the stackframe)

Returns:

the allocated slot number

setSlotNumber

public void setSlotNumber(int slot)

Allocate a slot number to this variable

Parameters:

slot - the position of the variable on the local stack frame

getRequiredType

public abstract SequenceType getRequiredType()

Get the static type of the variable.

Returns:

the static type declared for the variable

registerReference

public void registerReference(BindingReference ref)

Method called by VariableReference to register the variable reference for subsequent fixup

Specified by:

registerReference in interface VariableDeclaration

Parameters:

ref - the variable reference

isInstruction

public boolean isInstruction()

Determine whether this node is an instruction.

Overrides:

isInstruction in class StyleElement

Returns:

true - it is an instruction (well, it can be, anyway)

fixupReferences

public void fixupReferences()
                     throws XPathException

Notify all references to this variable of the data type

Overrides:

fixupReferences in class StyleElement

Throws:

XPathException - if any references cannot be fixed up.

validate

public void validate(Declaration decl)
              throws XPathException

Check that the variable is not already declared, and allocate a slot number

Overrides:

validate in class XSLGeneralVariable

Parameters:

decl -

Throws:

XPathException - if any error is found during validation

fixupBinding

protected void fixupBinding(Binding binding)

Notify all variable references of the Binding instruction

Parameters:

binding - the Binding that represents this variable declaration in the executable code tree

setReferenceCount

protected void setReferenceCount(GeneralVariable var)

Set the number of references to this variable. This code is invoked only for a global variable, and only if there is at least one reference.

Overrides:

setReferenceCount in class XSLGeneralVariable

Parameters:

var - the variable

index

protected void index(Declaration 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 - the outermost XSLStylesheet element

Throws:

XPathException - if any error is encountered

optimize

public void optimize(Declaration declaration)
              throws XPathException

Optimize the stylesheet construct

Specified by:

optimize in interface StylesheetProcedure

Parameters:

declaration -

Throws:

XPathException

getCompiledVariable

public GeneralVariable getCompiledVariable()

Get the compiled variable

Returns:

the compiled variable if it has been compiled, or null otherwise

getSequenceNumber

protected final long getSequenceNumber()

Get the node sequence number (in document order). Sequence numbers are monotonic but not consecutive. In the current implementation, parent nodes (elements and document nodes) have a zero least-significant word, while namespaces, attributes, text nodes, comments, and PIs have the top word the same as their owner and the bottom half reflecting their relative position. For nodes added by XQUery Update, the sequence number is -1L

Overrides:

getSequenceNumber in class NodeImpl

Returns:

the sequence number if there is one, or -1L otherwise.

getRawSequenceNumber

protected final int getRawSequenceNumber()

setRawSequenceNumber

protected final void setRawSequenceNumber(int seq)

setChildren

protected final void setChildren(Object children)

Set the children of this node

Parameters:

children - null if there are no children, a single NodeInfo if there is one child, an array of NodeInfo if there are multiple children

hasChildNodes

public final boolean hasChildNodes()

Determine if the node has any children.

Specified by:

hasChildNodes in interface NodeInfo

Overrides:

hasChildNodes in class NodeImpl

Returns:

true if the node has any children, false if the node has no children.

getNumberOfChildren

public final int getNumberOfChildren()

Determine how many children the node has

Returns:

the number of children of this parent node

enumerateChildren

protected final AxisIterator enumerateChildren(NodeTest test)

Get an enumeration of the children of this node

Parameters:

test - A NodeTest to be satisfied by the child nodes, or null if all child node are to be returned

Returns:

an iterator over the children of this node

getFirstChild

public final NodeInfo getFirstChild()

Get the first child node of the element

Overrides:

getFirstChild in class NodeImpl

Returns:

the first child node of the required type, or null if there are no children

getLastChild

public final NodeInfo getLastChild()

Get the last child node of the element

Overrides:

getLastChild in class NodeImpl

Returns:

the last child of the element, or null if there are no children

getNthChild

protected final NodeImpl getNthChild(int n)

Get the nth child node of the element (numbering from 0)

Parameters:

n - identifies the required child

Returns:

the last child of the element, or null if there is no n'th child

removeChild

protected void removeChild(NodeImpl child)

Remove a given child

Parameters:

child - the child to be removed

getStringValue

public String getStringValue()

Return the string-value of the node, that is, the concatenation of the character content of all descendent elements and text nodes.

Returns:

the accumulated character content of the element, including descendant elements.

See Also:

Item.getStringValueCS()

getStringValueCS

public CharSequence getStringValueCS()

Description copied from class: NodeImpl

Get the value of the item as a CharSequence. This is in some cases more efficient than the version of the method that returns a String.

Specified by:

getStringValueCS in interface Item<NodeInfo>

Specified by:

getStringValueCS in interface ValueRepresentation<NodeInfo>

Overrides:

getStringValueCS in class NodeImpl

Returns:

the string value of the item

See Also:

Item.getStringValue()

addChild

protected void addChild(NodeImpl node,
                        int index)

Add a child node to this node. For system use only. Note: normalizing adjacent text nodes is the responsibility of the caller.

Parameters:

node - the node to be added as a child of this node. This must be an instance of NodeImpl. It will be modified as a result of this call (by setting its parent property and sibling position)

index - the position where the child is to be added

insertChildren

public void insertChildren(NodeInfo[] source,
                           boolean atStart,
                           boolean inherit)

Insert a sequence of nodes as children of this node.

This method takes no action unless the target node is a document node or element node. It also takes no action in respect of any supplied nodes that are not elements, text nodes, comments, or processing instructions.

The supplied nodes will form the new children. Adjacent text nodes will be merged, and zero-length text nodes removed. The supplied nodes may be modified in situ, for example to change their parent property and to add namespace bindings, or they may be copied, at the discretion of the implementation.

Specified by:

insertChildren in interface MutableNodeInfo

Overrides:

insertChildren in class NodeImpl

Parameters:

source - the nodes to be inserted. The implementation determines what implementation classes of node it will accept; this implementation will accept text, comment, and processing instruction nodes belonging to any implementation, but elements must be instances of ElementImpl. The supplied nodes will be modified in situ, for example to change their parent property and to add namespace bindings, if they are instances of ElementImpl; otherwise they will be copied. If the nodes are copied, then on return the supplied source array will contain the copy rather than the original.

atStart - true if the new nodes are to be inserted before existing children; false if they are to be inserted after existing children

inherit - true if the inserted nodes are to inherit the namespaces of their new parent; false if such namespaces are to be undeclared

Throws:

IllegalArgumentException - if the supplied nodes use a node implementation that this implementation does not accept.

insertChildrenAt

protected void insertChildrenAt(NodeInfo[] source,
                                int index,
                                boolean inherit)

Insert children before or after a given existing child

Parameters:

source - the children to be inserted. We allow any kind of text, comment, or processing instruction node, but element nodes must be instances of this NodeInfo implementation.

index - the position before which they are to be inserted: 0 indicates insertion before the first child, 1 insertion before the second child, and so on.

inherit - true if the inserted nodes are to inherit the namespaces that are in-scope for their new parent; false if such namespaces should be undeclared on the children

replaceChildrenAt

protected void replaceChildrenAt(NodeInfo[] source,
                                 int index,
                                 boolean inherit)

Replace child at a given index by new children

Parameters:

source - the children to be inserted

index - the position at which they are to be inserted: 0 indicates replacement of the first child, replacement of the second child, and so on. The effect is undefined if index is out of range

inherit - set to true if the new child elements are to inherit the in-scope namespaces of their new parent

Throws:

IllegalArgumentException - if any of the replacement nodes is not an element, text, comment, or processing instruction node

compact

public void compact(int size)

Compact the space used by this node

Parameters:

size - the number of actual children