java.io.Serializable
, javax.xml.transform.SourceLocator
, Container
, Expression
, InstructionInfoProvider
public class DocumentSorter extends UnaryExpression
locationId, staticProperties
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
operand
Constructor | Description |
---|---|
DocumentSorter(Expression base) |
Modifier and Type | Method | Description |
---|---|---|
int |
computeSpecialProperties() |
Get the static properties of this expression (other than its type).
|
protected java.lang.String |
displayOperator(Configuration config) |
Give a string representation of the operator for use in diagnostics
|
boolean |
effectiveBooleanValue(XPathContext context) |
Get the effective boolean value of the expression.
|
SequenceIterator |
iterate(XPathContext context) |
Return an Iterator to iterate over the values of a sequence.
|
Expression |
optimize(Optimizer opt,
StaticContext env,
ItemType contextItemType) |
Perform optimisation of an expression and its subexpressions.
|
Expression |
promote(PromotionOffer offer) |
Promote this expression if possible
|
Expression |
simplify(StaticContext env) |
Simplify an expression
|
adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, evaluateAsString, evaluateItem, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getInstructionInfo, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, markTailFunctionCalls, process, resetStaticProperties, setLocationId, setParentExpression, setParentExpression, suppressValidation, typeError
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
computeCardinality, display, equals, getBaseExpression, getItemType, hashCode, iterateSubExpressions, replaceSubExpression, typeCheck
public DocumentSorter(Expression base)
public Expression simplify(StaticContext env) throws XPathException
UnaryExpression
simplify
in interface Expression
simplify
in class UnaryExpression
env
- the static contextXPathException
- if an error is discovered during expression
rewritingpublic Expression optimize(Optimizer opt, StaticContext env, ItemType contextItemType) throws XPathException
UnaryExpression
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.
optimize
in interface Expression
optimize
in class UnaryExpression
opt
- the optimizer in use. This provides access to supporting functions; it also allows
different optimization strategies to be used in different circumstances.env
- the static context of the expressioncontextItemType
- the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
net.sf.saxon.trans.StaticError
- if an error is discovered during this phase
(typically a type error)XPathException
public int computeSpecialProperties()
UnaryExpression
computeSpecialProperties
in class UnaryExpression
public Expression promote(PromotionOffer offer) throws XPathException
promote
in interface Expression
promote
in class UnaryExpression
offer
- details of the offer, for example the offer to move
expressions that don't depend on the context to an outer level in
the containing expressionXPathException
- if any error is detectedpublic SequenceIterator iterate(XPathContext context) throws XPathException
ComputedExpression
iterate
in interface Expression
iterate
in class ComputedExpression
context
- supplies the context for evaluationXPathException
- if any dynamic error occurs evaluating the
expressionpublic boolean effectiveBooleanValue(XPathContext context) throws XPathException
ComputedExpression
effectiveBooleanValue
in interface Expression
effectiveBooleanValue
in class ComputedExpression
context
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionprotected java.lang.String displayOperator(Configuration config)
displayOperator
in class UnaryExpression
config
-