org.scijava.sjep.eval

Class AbstractEvaluator

java.lang.Object

org.scijava.sjep.eval.AbstractEvaluator

All Implemented Interfaces:

Evaluator

Direct Known Subclasses:

AbstractStackEvaluator

public abstract class AbstractEvaluator
extends Object
implements Evaluator

Base class for Evaluator implementations.

Author:

Curtis Rueden

Constructor Summary

Constructors

Constructor and Description
AbstractEvaluator()
AbstractEvaluator(ExpressionParser parser)

Method Summary

Modifier and Type	Method and Description
Object	evaluate(String expression) Evaluates the given infix expression, returning the result.
Object	evaluate(SyntaxTree syntaxTree) Evaluates the given syntax tree, returning the result.
Object	get(Variable v) Gets the value of the given variable.
ExpressionParser	getParser() Gets the parser used when evaluating expressions.
void	set(Variable v, Object value) Sets the value of the given variable.
void	setAll(Map<? extends String,? extends Object> map) Assigns variables en masse.
Object	value(Object token) Gets the value of the given token.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.scijava.sjep.eval.Evaluator

evaluate

Constructor Detail

AbstractEvaluator

public AbstractEvaluator()

AbstractEvaluator

public AbstractEvaluator(ExpressionParser parser)

Method Detail

getParser

public ExpressionParser getParser()

Description copied from interface: Evaluator

Gets the parser used when evaluating expressions.

Specified by:

getParser in interface Evaluator

evaluate

public Object evaluate(SyntaxTree syntaxTree)

Description copied from interface: Evaluator

Evaluates the given syntax tree, returning the result.

Specified by:

evaluate in interface Evaluator

evaluate

public Object evaluate(String expression)

Description copied from interface: Evaluator

Evaluates the given infix expression, returning the result.

Specified by:

evaluate in interface Evaluator

value

public Object value(Object token)

Description copied from interface: Evaluator

Gets the value of the given token. For variables, returns the value of the variable, throwing an exception if the variable is not set. For literals, returns the token itself.

Specified by:

value in interface Evaluator

get

public Object get(Variable v)

Description copied from interface: Evaluator

Gets the value of the given variable.

Specified by:

get in interface Evaluator

set

public void set(Variable v,
                Object value)

Description copied from interface: Evaluator

Sets the value of the given variable.

Specified by:

set in interface Evaluator

setAll

public void setAll(Map<? extends String,? extends Object> map)

Description copied from interface: Evaluator

Assigns variables en masse.

Specified by:

setAll in interface Evaluator