net.sf.saxon.style
Class XSLGeneralVariable

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

All Implemented Interfaces:

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

Direct Known Subclasses:

SaxonAssign, XSLVariableDeclaration, XSLWithParam

public abstract class XSLGeneralVariable
extends StyleElement

This class defines common behaviour across xsl:variable, xsl:param, and xsl:with-param

See Also:

Serialized Form

Field Summary

protected boolean	assignable
protected Object	children
protected GeneralVariable	compiledVariable
protected String	constantText
protected boolean	global
protected boolean	implicitlyRequiredParam
protected boolean	redundant
protected boolean	requiredParam
protected SequenceType	requiredType
protected Expression	select
protected int	sequence
protected SlotManager	slotManager
protected boolean	tunnel

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

defaultCollationName, defaultXPathNamespace, extensionNamespaces, REPORT_ALWAYS, REPORT_IF_INSTANTIATED, REPORT_UNLESS_FALLBACK_AVAILABLE, REPORT_UNLESS_FORWARDS_COMPATIBLE, reportingCircumstances, staticContext, validationError, version

Fields inherited from class net.sf.saxon.tree.ElementImpl

attributeList, nameCode, namespaceList, typeCode

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

index, NODE_LETTER, parent

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

ALL_NAMESPACES, EMPTY_NAMESPACE_LIST, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES

Constructor Summary

XSLGeneralVariable()

Method Summary

void	addChild(NodeImpl node, int index) Add a child node to this node.
protected boolean	allowsAsAttribute()
protected boolean	allowsRequired()
protected boolean	allowsTunnelAttribute()
protected boolean	allowsValue()
void	checkAgainstRequiredType(SequenceType required) Check the supplied select expression against the required type.
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
int	getConstructType() Get the type of construct.
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 ItemType	getReturnedItemType() Determine the type of item returned by this instruction (only relevant if it is an instruction).
protected long	getSequenceNumber() Get the node sequence number (in document order).
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.
String	getVariableDisplayName() Get the display name of the variable.
StructuredQName	getVariableQName() Get the QName of the variable
boolean	hasChildNodes() Determine if the node has any children.
protected void	initializeInstruction(Executable exec, GeneralVariable var) Initialize - common code called from the compile() method of all subclasses
void	insertChildren(NodeInfo[] source, boolean atStart, boolean inherit) Insert copies of 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	isAssignable() Test whether it is permitted to assign to the variable using the saxon:assign extension element.
boolean	isGlobal() Test whether this is a global variable or parameter
boolean	isRequiredParam() Test whether this is a required parameter (required="yes")
boolean	isTunnelParam() Test whether this is a tunnel parameter (tunnel="yes")
boolean	mayContainSequenceConstructor() Determine whether this type of element is allowed to contain a template-body
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.
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
void	setRedundant() Mark this global variable as redundant.
protected void	setReferenceCount(GeneralVariable var)
protected void	useChildrenArray(NodeImpl[] array) Supply an array to be used for the array of children.
void	validate() Check that the stylesheet element is valid.

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

allocateLocationId, allocatePatternSlots, allocateSlots, backwardsCompatibleModeIsEnabled, bindVariable, checkEmpty, checkSortComesFirst, checkTopLevel, checkUnknownAttribute, checkWithinTemplate, compile, compileError, compileError, compileError, compileError, compileSequenceConstructor, compileWarning, compileWarning, definesExcludedNamespace, definesExtensionElement, fallbackProcessing, fixupReferences, forwardsCompatibleModeIsEnabled, getAllStylesheetFunctions, getAttributeSets, getAttributeValue, getColumnNumber, getCommonChildItemType, getContainerGranularity, getContainingSlotManager, getContainingStylesheet, getDefaultCollationName, getDefaultXPathNamespace, getExecutable, getHostLanguage, getLastChildInstruction, getLineNumber, getLocationProvider, getNamespaceResolver, getObjectName, getPrecedence, getPreparedStylesheet, getPrincipalStylesheet, getProperties, getProperty, getSchemaType, getStaticContext, getStylesheetFunction, getSystemId, getTypeAnnotation, getVersion, getWithParamInstructions, index, isExcludedNamespace, isExplaining, isExtensionNamespace, isInstruction, isPermittedChild, issueWarning, issueWarning, isTopLevel, makeAttributeValueTemplate, makeExpression, makeExpressionVisitor, makeNamespaceContext, makePattern, makeQName, makeSequenceType, makeSortKeys, makeTraceInstruction, markTailCalls, mayContainFallback, mayContainParam, processAllAttributes, processAttributes, processDefaultCollationAttribute, processDefaultXPathNamespaceAttribute, processExcludedNamespaces, processExtensionElementAttribute, processStandardAttributes, processVersionAttribute, replaceSubExpression, reportAbsence, seesAvuncularVariables, setObjectName, setValidationError, substituteFor, typeCheck, typeCheck, undeclaredNamespaceError, validateChildren, validateSubtree

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

addAttribute, addNamespace, copy, delete, fixupInsertedNamespaces, generateId, getAttributeList, getAttributeValue, getAttributeValue, getBaseURI, getColumnNumber, getDeclaredNamespaces, getDocumentRoot, getInScopeNamespaceCodes, getLineNumber, getNameCode, getNodeKind, getPrefixForURI, getRoot, getSystemId, getTypeAnnotation, getURICodeForPrefix, getURICodeForPrefixCode, getURIForPrefix, initialise, isId, isNilled, iteratePrefixes, removeAttribute, removeTypeAnnotation, rename, replaceStringValue, setLineAndColumn, setLocation, setNameCode, setNamespaceDeclarations, setSystemId, setTypeAnnotation

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

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

Methods inherited from class java.lang.Object

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

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

select

protected Expression select

requiredType

protected SequenceType requiredType

constantText

protected String constantText

global

protected boolean global

slotManager

protected SlotManager slotManager

assignable

protected boolean assignable

redundant

protected boolean redundant

requiredParam

protected boolean requiredParam

implicitlyRequiredParam

protected boolean implicitlyRequiredParam

tunnel

protected boolean tunnel

compiledVariable

protected GeneralVariable compiledVariable

children

protected Object children

sequence

protected int sequence

Constructor Detail

XSLGeneralVariable

public XSLGeneralVariable()

Method Detail

getReturnedItemType

protected ItemType getReturnedItemType()

Determine the type of item returned by this instruction (only relevant if it is an instruction).

Overrides:

getReturnedItemType in class StyleElement

Returns:

the item type returned. This is null for a variable: we are not interested in the type of the variable, but in what the xsl:variable constributes to the result of the sequence constructor it is part of.

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

allowsAsAttribute

protected boolean allowsAsAttribute()

allowsTunnelAttribute

protected boolean allowsTunnelAttribute()

allowsValue

protected boolean allowsValue()

allowsRequired

protected boolean allowsRequired()

isAssignable

public boolean isAssignable()

Test whether it is permitted to assign to the variable using the saxon:assign extension element.

Returns:

true if the extra attribute saxon:assignable="yes" is present.

isTunnelParam

public boolean isTunnelParam()

Test whether this is a tunnel parameter (tunnel="yes")

Returns:

true if this is a tunnel parameter

isRequiredParam

public boolean isRequiredParam()

Test whether this is a required parameter (required="yes")

Returns:

true if this is a required parameter

isGlobal

public boolean isGlobal()

Test whether this is a global variable or parameter

Returns:

true if this is global

getVariableDisplayName

public String getVariableDisplayName()

Get the display name of the variable.

Returns:

the lexical QName

setRedundant

public void setRedundant()

Mark this global variable as redundant. This is done before prepareAttributes is called.

getVariableQName

public StructuredQName getVariableQName()

Get the QName of the variable

Returns:

the name as a structured QName, or a dummy name if the variable has no name attribute or has an invalid name attribute

prepareAttributes

public void prepareAttributes()
                       throws XPathException

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

Throws:

XPathException

validate

public void validate()
              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

Throws:

XPathException

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

checkAgainstRequiredType

public void checkAgainstRequiredType(SequenceType required)
                              throws XPathException

Check the supplied select expression against the required type.

Parameters:

required - The type required by the variable declaration, or in the case of xsl:with-param, the signature of the called template

Throws:

XPathException

initializeInstruction

protected void initializeInstruction(Executable exec,
                                     GeneralVariable var)
                              throws XPathException

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

Parameters:

exec - the executable

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

Throws:

XPathException

setReferenceCount

protected void setReferenceCount(GeneralVariable var)

getConstructType

public int getConstructType()

Get the type of construct. This will be a constant in class Location. This method is part of the InstructionInfo interface

Specified by:

getConstructType in interface InstructionInfo

Overrides:

getConstructType in class StyleElement

Returns:

an integer identifying the kind of construct

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.

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 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

Specified by:

getStringValueCS in interface ValueRepresentation

Overrides:

getStringValueCS in class NodeImpl

Returns:

the string value of the item

See Also:

Item.getStringValue()

useChildrenArray

protected void useChildrenArray(NodeImpl[] array)

Supply an array to be used for the array of children. For system use only.

Parameters:

array - the array to be used

addChild

public 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

index - the position where the child is to be added

insertChildren

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

Insert copies of 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 be copied to form the new children. Adjacent text nodes will be merged, and zero-length text nodes removed.

Specified by:

insertChildren in interface MutableNodeInfo

Overrides:

insertChildren in class NodeImpl

Parameters:

source - the nodes to be inserted

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

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

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

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