Class Evaluator.EagerSequence

java.lang.Object

net.sf.saxon.expr.parser.Evaluator

net.sf.saxon.expr.parser.Evaluator.EagerSequence

Enclosing class:

Evaluator

public static final class Evaluator.EagerSequence
extends Evaluator

An evaluator for arguments that in general return a sequence, where the sequence is evaluated eagerly. This is appropriate when it is known that the function will always use the entire value, or when it will use it more than once.

Nested Class Summary

Nested classes/interfaces inherited from class Evaluator

Evaluator.EagerSequence, Evaluator.EmptySequenceEvaluator, Evaluator.LazySequence, Evaluator.LazyTail, Evaluator.Literal, Evaluator.MakeIndexedVariable, Evaluator.MemoClosureEvaluator, Evaluator.OptionalItem, Evaluator.Process, Evaluator.SharedAppend, Evaluator.SingleItem, Evaluator.SingletonClosure, Evaluator.StreamingArgument, Evaluator.SuppliedParameter, Evaluator.Variable

Field Summary

Fields

Modifier and Type	Field	Description
static Evaluator.EagerSequence	INSTANCE

Constructor Summary

Constructors

Constructor	Description
EagerSequence()

Method Summary

Modifier and Type	Method	Description
Sequence	evaluate(Expression expr, XPathContext context)	Evaluate an expression to return a sequence
int	getCode()	Get the integer code for the evaluator

Methods inherited from class Object

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

Field Details

INSTANCE

public static Evaluator.EagerSequence INSTANCE

Constructor Details

EagerSequence

public EagerSequence()

Method Details

getCode

public int getCode()

Description copied from class: Evaluator

Get the integer code for the evaluator

Specified by:

getCode in class Evaluator

Returns:

the integer code for the evaluator

evaluate

public Sequence evaluate(Expression expr,
 XPathContext context)
                  throws XPathException

Description copied from class: Evaluator

Evaluate an expression to return a sequence

Specified by:

evaluate in class Evaluator

Parameters:

expr - the expression to be evaluated

context - the dynamic context for evaluation

Returns:

the result of the evaluation

Throws:

XPathException - if any dynamic error occurs during the evaluation