Package com.singularsys.jep.standard

Class UncheckedEvaluator

java.lang.Object

com.singularsys.jep.standard.UncheckedEvaluator

All Implemented Interfaces:

Evaluator, JepComponent, ParserVisitor, java.io.Serializable

public final class UncheckedEvaluator
extends java.lang.Object
implements Evaluator, ParserVisitor

An evaluator which does fewer checks on values with a 5% faster speed.

Since:

3.5

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
UncheckedEvaluator()

Method Summary

Modifier and Type	Method	Description
java.lang.Object	eval(Node node)	Evaluates a sub expression.
java.lang.Object	evaluate(Node node)	Main entry point, evaluates a node and returns and object with the value of the node.
JepComponent	getLightWeightInstance()	Gets a light-weight instance suitable for using in multiple threads.
void	init(Jep jep)	Initialize the component.
protected java.lang.Object	nodeAccept(Node node)
java.lang.Object	visit(ASTConstant node, java.lang.Object data)
java.lang.Object	visit(ASTFunNode node, java.lang.Object data)
java.lang.Object	visit(ASTOpNode node, java.lang.Object data)
java.lang.Object	visit(ASTVarNode node, java.lang.Object data)
java.lang.Object	visitConstant(Node node)
protected java.lang.Object	visitFun(Node node)	Visits a function/operator node.
java.lang.Object	visitVar(Node node)

Methods inherited from class java.lang.Object

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

Constructor Detail

UncheckedEvaluator

public UncheckedEvaluator()

Method Detail

init

public void init(Jep jep)

Description copied from interface: JepComponent

Initialize the component. This methods is called whenever a component is added to Jep. Hence it allows components to keep track of the other components they may rely on.

Specified by:

init in interface JepComponent

Parameters:

jep - the current Jep instance

eval

public java.lang.Object eval(Node node)
                      throws EvaluationException

Description copied from interface: Evaluator

Evaluates a sub expression. This method can be called by PostfixMathCommands which implement CallbackEvaluationI

Specified by:

eval in interface Evaluator

Parameters:

node - node to evaluate

Returns:

The value after evaluating the sub expression.

Throws:

EvaluationException - if errors occur during evaluation;

evaluate

public java.lang.Object evaluate(Node node)
                          throws EvaluationException

Description copied from interface: Evaluator

Main entry point, evaluates a node and returns and object with the value of the node.

Specified by:

evaluate in interface Evaluator

Parameters:

node - node to evaluate

Returns:

value after evaluation

Throws:

EvaluationException - if errors occur during evaluation;

nodeAccept

protected java.lang.Object nodeAccept(Node node)
                               throws EvaluationException

Throws:

EvaluationException

visit

public java.lang.Object visit(ASTConstant node,
                              java.lang.Object data)
                       throws EvaluationException

Specified by:

visit in interface ParserVisitor

Throws:

EvaluationException

visitConstant

public java.lang.Object visitConstant(Node node)
                               throws EvaluationException

Throws:

EvaluationException

visit

public java.lang.Object visit(ASTVarNode node,
                              java.lang.Object data)
                       throws EvaluationException

Specified by:

visit in interface ParserVisitor

Throws:

EvaluationException

visitVar

public java.lang.Object visitVar(Node node)
                          throws EvaluationException

Throws:

EvaluationException

visit

public java.lang.Object visit(ASTFunNode node,
                              java.lang.Object data)
                       throws EvaluationException

Specified by:

visit in interface ParserVisitor

Throws:

EvaluationException

visit

public java.lang.Object visit(ASTOpNode node,
                              java.lang.Object data)
                       throws EvaluationException

Specified by:

visit in interface ParserVisitor

Throws:

EvaluationException

visitFun

protected java.lang.Object visitFun(Node node)
                             throws EvaluationException

Visits a function/operator node. This is the most visited method for most expression evaluations. Keeping it fast is important.

Parameters:

node -

Throws:

EvaluationException

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

an new FastEvaluator