net.sf.saxon.style
Class XSLGeneralVariable

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

All Implemented Interfaces:

Container, FingerprintedNode, InstructionInfo, Item, LocationProvider, org.xml.sax.Locator, NodeInfo, SaxonLocator, javax.xml.transform.Source, javax.xml.transform.SourceLocator, ValueRepresentation

Direct Known Subclasses:

SaxonAssign, SQLColumn, XSLVariableDeclaration, XSLWithParam

public abstract class XSLGeneralVariable

extends StyleElement

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

Field Summary

protected boolean	assignable
protected java.lang.String	constantText
protected boolean	global
protected boolean	redundant
protected boolean	requiredParam
protected SequenceType	requiredType
protected Expression	select
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.ElementWithAttributes

attributeList, namespaceList

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

nameCode, root, sequence

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, LOCAL_NAMESPACES, NO_NAMESPACES

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

EMPTY_VALUE_ARRAY

Constructor Summary

XSLGeneralVariable()

Method Summary

protected boolean	allowsAsAttribute()
protected boolean	allowsRequired()
protected boolean	allowsTunnelAttribute()
protected boolean	allowsValue()
protected void	checkAgainstRequiredType(SequenceType required) Check the supplied select expression against the required type.
int	getConstructType() Get the type of construct.
protected ItemType	getReturnedItemType() Determine the type of item returned by this instruction (only relevant if it is an instruction).
int	getVariableFingerprint() Get the fingerprint of the variable name
java.lang.String	getVariableName() Get the display name of the variable.
protected void	initializeInstruction(Executable exec, GeneralVariable var) Initialize - common code called from the compile() method of all subclasses
boolean	isAssignable() Test whether it is permitted to assign to the variable using the saxon:assign extension element.
boolean	isGlobal()
boolean	isRequiredParam()
boolean	isTunnelParam()
boolean	mayContainSequenceConstructor() Determine whether this type of element is allowed to contain a template-body
void	prepareAttributes() Set the attribute list for the element.
void	setRedundant() Mark this global variable as redundant.
protected void	setReferenceCount(GeneralVariable var)
void	validate() Check that the stylesheet element is valid.

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

allocateLocationId, allocateSlots, backwardsCompatibleModeIsEnabled, bindVariable, checkEmpty, checkSortComesFirst, checkTopLevel, checkUnknownAttribute, checkWithinTemplate, compile, compileError, compileError, compileError, compileSequenceConstructor, compileWarning, definesExcludedNamespace, definesExtensionElement, fallbackProcessing, fixupReferences, forwardsCompatibleModeIsEnabled, getAttributeSets, getAttributeValue, getCommonChildItemType, getContainingSlotManager, getContainingStylesheet, getDefaultCollationName, getDefaultXPathNamespace, getExecutable, getHostLanguage, getLastChildInstruction, getLineNumber, getLineNumber, getLocationProvider, getNamespaceResolver, getObjectFingerprint, getObjectNameCode, getPrecedence, getPreparedStylesheet, getPrincipalStylesheet, getProperties, getProperty, getSchemaType, getStaticContext, getStylesheetFunction, getSystemId, getTargetNamePool, getTypeAnnotation, getVersion, getWithParamInstructions, isExcludedNamespace, isExplaining, isExtensionNamespace, isInstruction, isPermittedChild, issueWarning, issueWarning, isTopLevel, makeAttributeValueTemplate, makeExpression, makeNameCode, makeNamespaceContext, makePattern, makeSequenceType, makeSortKeys, makeTraceInstruction, markTailCalls, mayContainFallback, postValidate, processAllAttributes, processAttributes, processDefaultCollationAttribute, processDefaultXPathNamespaceAttribute, processExcludedNamespaces, processExtensionElementAttribute, processVersionAttribute, reportAbsence, setLineNumber, setObjectNameCode, setValidationError, substituteFor, typeCheck, typeCheck, undeclaredNamespaceError, validateChildren, validateSubtree

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

copy, getAttributeList, getAttributeValue, getDeclaredNamespaces, getInScopeNamespaceCodes, getPrefixForURI, getURICodeForPrefix, getURIForPrefix, initialise, iteratePrefixes, sendNamespaceDeclarations, setNamespaceDeclarations

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

addChild, compact, enumerateChildren, generateId, getBaseURI, getDocumentRoot, getFirstChild, getLastChild, getNameCode, getNodeKind, getNthChild, getRoot, getSequenceNumber, getStringValue, getStringValueCS, getSystemId, hasChildNodes, setNameCode, setSystemId, useChildrenArray

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

atomize, compareOrder, equals, getColumnNumber, getConfiguration, getDisplayName, getDocumentNumber, getFingerprint, getLocalPart, getNamePool, getNextInDocument, getNextSibling, getParent, getPrefix, getPreviousInDocument, getPreviousSibling, getPublicId, getTypeAnnotation, getTypedValue, getURI, hashCode, isSameNodeInfo, iterateAxis, iterateAxis

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xml.sax.Locator

getColumnNumber, getPublicId, getSystemId

Methods inherited from interface javax.xml.transform.SourceLocator

getColumnNumber, getPublicId, getSystemId

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

getSystemId

Field Detail

select

protected Expression select

requiredType

protected SequenceType requiredType

constantText

protected java.lang.String constantText

global

protected boolean global

slotManager

protected SlotManager slotManager

assignable

protected boolean assignable

redundant

protected boolean redundant

requiredParam

protected boolean requiredParam

tunnel

protected boolean tunnel

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. This will only be true if the extra attribute saxon:assignable="yes" is present.

isTunnelParam

public boolean isTunnelParam()

isRequiredParam

public boolean isRequiredParam()

isGlobal

public boolean isGlobal()

getVariableName

public java.lang.String getVariableName()

Get the display name of the variable.

setRedundant

public void setRedundant()

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

getVariableFingerprint

public int getVariableFingerprint()

Get the fingerprint of the variable name

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

checkAgainstRequiredType

protected 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

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