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:
Expression, java.io.Serializable

public class Unordered
extends CompileTimeFunction

XPath 2.0 unordered() function

See Also:
Serialized Form

Field Summary
 
Fields inherited from class net.sf.saxon.functions.SystemFunction
operation
 
Fields inherited from class net.sf.saxon.expr.FunctionCall
argument
 
Fields inherited from class net.sf.saxon.expr.ComputedExpression
lineNumber, NO_ARGUMENTS, staticProperties
 
Constructor Summary
Unordered()
           
 
Method Summary
 Expression analyze(StaticContext env)
          Type-check the expression.
 Expression preEvaluate(StaticContext env)
          preEvaluate: called if the argument is constant
 
Methods inherited from class net.sf.saxon.functions.CompileTimeFunction
evaluateItem, iterate
 
Methods inherited from class net.sf.saxon.functions.SystemFunction
addContextDocumentArgument, checkArguments, computeCardinality, display, getDetails, getItemType, getName, getRequiredType, main, makeSystemFunction, useContextItemAsDefault
 
Methods inherited from class net.sf.saxon.expr.FunctionCall
checkArgumentCount, getNumberOfArguments, getSubExpressions, promote, setArguments, simplify, simplifyArguments
 
Methods inherited from class net.sf.saxon.expr.ComputedExpression
computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getDependencies, getIntrinsicDependencies, getLineNumber, getSourceLocator, getSpecialProperties, markTailFunctionCalls, setLineNumber, typeError
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Unordered

public Unordered()
Method Detail

analyze

public Expression analyze(StaticContext env)
                   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:
analyze in interface Expression
Overrides:
analyze in class FunctionCall
Parameters:
env - the static context of the expression
Returns:
the original expression, rewritten to perform necessary run-time type checks, and to perform other type-related optimizations
XPathException

preEvaluate

public Expression preEvaluate(StaticContext env)
                       throws XPathException
preEvaluate: called if the argument is constant

Overrides:
preEvaluate in class CompileTimeFunction
XPathException