Package net.sf.saxon.style

Class XSLIf

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.XSLIf

All Implemented Interfaces:

javax.xml.transform.Source, javax.xml.transform.SourceLocator, ActiveSource, GroundedValue, Item, MutableNodeInfo, NamespaceResolver, NodeInfo, Sequence, Location, SteppingNode, SiblingCountingNode, org.xml.sax.Locator

public class XSLIf
extends StyleElement

Handler for xsl:if elements in stylesheet.
The xsl:if element has a mandatory attribute test, a boolean expression. The content is output if the test condition is true.

Nested Class Summary

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

StyleElement.OnFailure

Field Summary

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, YES_NO

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

NODE_LETTER

Constructor Summary

Constructors

Constructor	Description
XSLIf()

Method Summary

Modifier and Type	Method	Description
Expression	compile(Compilation exec, ComponentDeclaration decl)	Compile the instruction on the stylesheet tree into an executable instruction for use at run-time.
Expression	compileSequenceConstructor(Compilation compilation, ComponentDeclaration decl, boolean includeParams)	Compile the children of this instruction on the stylesheet tree, adding the subordinate instructions to the parent instruction on the execution tree.
boolean	isInstruction()	Determine whether this node is an instruction.
protected boolean	markTailCalls()	Mark tail-recursive calls on stylesheet functions.
protected boolean	mayContainSequenceConstructor()	Determine whether this type of element is allowed to contain a template-body
protected void	prepareAttributes()	Set the attribute list for the element.
static Expression	prepareTestAttribute(StyleElement se)	Process all the attributes, for an element where the only permitted attribute is "test"
void	validate(ComponentDeclaration decl)	Check that the stylesheet element is valid.

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

allocateLocation, arrayToSequence, bindLocalVariable, bindVariable, checkEmpty, checkTopLevel, checkUnknownAttribute, compileDeclaration, compileError, compileError, compileError, compileError, compileError, compileError, compileErrorInAttribute, compileSequenceConstructor, compileWarning, compileWarning, compileWarning, fixupReferences, generateId, getAttributeValue, getBaseURI, getBindingInformation, getCompilation, getConfiguration, getContainingPackage, getContainingSlotManager, getDeclaredVisibility, getDefaultCollationName, getDefaultXPathNamespace, getNamespaceResolver, getObjectName, getPackageData, getPrincipalStylesheetModule, getProperties, getSchemaType, getStaticContext, getStaticContext, getTypeAnnotation, getUsedPackage, getVisibility, getWithParamInstructions, getXslOriginal, hasImplicitBinding, index, invalidAttribute, isDeclaration, isExtensionAttributeAllowed, isExtensionNamespace, isNo, isPermittedChild, isSchemaAware, issueWarning, issueWarning, isTopLevel, isWithinDeclaredStreamableConstruct, isYes, makeAttributeValueTemplate, makeExpression, makeExpressionVisitor, makeQName, makeRetainedStaticContext, makeSequenceType, mapToSequence, mayContainFallback, mayContainParam, postValidate, processAllAttributes, processAttributes, processBooleanAttribute, processStandardAttributes, processVersionAttribute, reportAbsence, requireXslt40, seesAvuncularVariables, setCompilation, setInstructionLocation, setObjectName, setValidationError, substituteFor, typeCheck, typeCheck, validateChildren, validateSubtree, validateValidationAttribute

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

addAttribute, addNamespace, addNamespace, attributes, checkNotNamespaceSensitiveElement, copy, delete, fixupInsertedNamespaces, generateId, getAllNamespaces, getAttributeValue, getColumnNumber, getDeclaredNamespaces, getLineNumber, getNodeKind, getNodeName, getRoot, getSchemaType, getSystemId, getURIForPrefix, initialise, isId, isIdref, isIdRefNode, 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, compact, getFirstChild, getLastChild, getNthChild, getNumberOfChildren, getRawSequenceNumber, getSequenceNumber, getUnicodeStringValue, hasChildNodes, insertChildren, insertChildrenAt, 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, hashCode, head, insertSiblings, isDeleted, iterateAxis, iterateAxis, newBuilder, replace, saveLocation, setRawParent, setSiblingPosition

Methods inherited from class java.lang.Object

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

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

asIterable, concatenate, containsNode, materialize

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

getLength, getStringValue, itemAt, iterate, reduce, subsequence

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

asActiveSource, children, children, deliver, getGenre, getPublicId, isSameNodeInfo, isStreamed, toShortString

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

makeRepeatable

Methods inherited from interface javax.xml.transform.Source

isEmpty

Constructor Detail

XSLIf

public XSLIf()

Method Detail

isInstruction

public boolean isInstruction()

Determine whether this node is an instruction.

Overrides:

isInstruction in class StyleElement

Returns:

true - it is an instruction

mayContainSequenceConstructor

protected 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

prepareAttributes

protected 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

prepareTestAttribute

public static Expression prepareTestAttribute(StyleElement se)

Process all the attributes, for an element where the only permitted attribute is "test"

Parameters:

se - the containing element

Returns:

the expression represented by the test attribute, or null if the attribute is absent

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

markTailCalls

protected boolean markTailCalls()

Mark tail-recursive calls on stylesheet functions. For most instructions, this does nothing.

Overrides:

markTailCalls in class StyleElement

Returns:

true if one or more tail calls were identified

compile

public Expression compile(Compilation exec,
                          ComponentDeclaration decl)
                   throws XPathException

Description copied from class: StyleElement

Compile the instruction on the stylesheet tree into an executable instruction for use at run-time.

Overrides:

compile in class StyleElement

Parameters:

exec - the compilation episode

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

Returns:

either a ComputedExpression, or null. The value null is returned when compiling an instruction that returns a no-op, or when compiling a top-level object such as an xsl:template that compiles into something other than an instruction.

Throws:

XPathException - if validation fails

compileSequenceConstructor

public Expression compileSequenceConstructor(Compilation compilation,
                                             ComponentDeclaration decl,
                                             boolean includeParams)
                                      throws XPathException

Description copied from class: StyleElement

Compile the children of this instruction on the stylesheet tree, adding the subordinate instructions to the parent instruction on the execution tree.

Overrides:

compileSequenceConstructor in class StyleElement

Parameters:

compilation - the Executable

decl - the Declaration of the containing top-level stylesheet element

includeParams - true if xsl:param elements are to be treated as child instructions (true for templates but not for functions)

Returns:

the compiled sequence constructor

Throws:

XPathException - if compilation fails