net.sf.saxon.functions
Class Unordered
java.lang.Object
net.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.FunctionCall
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.CompileTimeFunction
net.sf.saxon.functions.Unordered
- All Implemented Interfaces:
- Serializable, SourceLocator, Container, Expression, InstructionInfoProvider
public class Unordered
- extends CompileTimeFunction
XPath 2.0 unordered() function
- See Also:
- Serialized Form
Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, checkArguments, computeCardinality, computeSpecialProperties, display, getDetails, getErrorCodeForTypeErrors, getItemType, getRequiredType, main, makeSystemFunction, setDetails, useContextItemAsDefault |
Methods inherited from class net.sf.saxon.expr.FunctionCall |
checkArgumentCount, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, optimize, promote, setArguments, setFunctionNameCode, simplify, simplifyArguments |
Methods inherited from class net.sf.saxon.expr.ComputedExpression |
adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getInstructionInfo, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, markTailFunctionCalls, process, resetStaticProperties, setLocationId, setParentExpression, suppressValidation, typeError, typeError |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Unordered
public Unordered()
typeCheck
public Expression typeCheck(StaticContext env,
ItemType contextItemType)
throws XPathException
- Description copied from class:
FunctionCall
- Type-check the expression. This also calls preEvaluate() to evaluate the function
if all the arguments are constant; functions that do not require this behavior
can override the preEvaluate method.
- Specified by:
typeCheck
in interface Expression
- Overrides:
typeCheck
in class FunctionCall
- Parameters:
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
- Returns:
- the original expression, rewritten to perform necessary
run-time type checks, and to perform other type-related
optimizations
- Throws:
StaticError
- if an error is discovered during this phase
(typically a type error)
XPathException
optimizer
public Expression optimizer(Optimizer opt,
StaticContext env,
ItemType contextItemType)
throws XPathException
- Throws:
XPathException
preEvaluate
public Expression preEvaluate(StaticContext env)
throws XPathException
- preEvaluate: called if the argument is constant
- Overrides:
preEvaluate
in class CompileTimeFunction
- Throws:
XPathException