org.milyn.expression
Class MVELExpressionEvaluator

java.lang.Object
  org.milyn.expression.MVELExpressionEvaluator

All Implemented Interfaces:

ExpressionEvaluator

public class MVELExpressionEvaluator
extends Object
implements ExpressionEvaluator

MVEL expression evaluator.

Author:

tom.fennelly@gmail.com

Nested Class Summary

Nested classes/interfaces inherited from interface org.milyn.expression.ExpressionEvaluator

ExpressionEvaluator.Factory

Constructor Summary

MVELExpressionEvaluator()

Method Summary

boolean	eval(Object contextObject) Evaluate a conditional expression against the supplied object (can be a Map).
String	getExpression() Get the String representation of the active expression on the evaluator instance.
Object	getValue(Object contextObject) Evaluate an expression against the supplied Map variable, returning the eval result.
void	setExpression(String expression) Set the condition expression for the evaluator implementation.

Methods inherited from class java.lang.Object

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

Constructor Detail

MVELExpressionEvaluator

public MVELExpressionEvaluator()

Method Detail

setExpression

public void setExpression(String expression)
                   throws SmooksConfigurationException

Description copied from interface: ExpressionEvaluator

Set the condition expression for the evaluator implementation.

Specified by:

setExpression in interface ExpressionEvaluator

Parameters:

expression - The expression to be evaluated by the evaluator implementation.

Throws:

SmooksConfigurationException - Invalid expression configuration.

getExpression

public String getExpression()

Description copied from interface: ExpressionEvaluator

Get the String representation of the active expression on the evaluator instance.

Specified by:

getExpression in interface ExpressionEvaluator

Returns:

The active expression String representation.

eval

public boolean eval(Object contextObject)
             throws ExpressionEvaluationException

Description copied from interface: ExpressionEvaluator

Evaluate a conditional expression against the supplied object (can be a Map).

Specified by:

eval in interface ExpressionEvaluator

Parameters:

contextObject - The object against which the expression is to be evaluated.

Returns:

True if the expression evaluates to true, otherwise false.

Throws:

ExpressionEvaluationException - Invalid expression evaluation condition (implementation specific).

getValue

public Object getValue(Object contextObject)
                throws ExpressionEvaluationException

Description copied from interface: ExpressionEvaluator

Evaluate an expression against the supplied Map variable, returning the eval result.

Specified by:

getValue in interface ExpressionEvaluator

Returns:

Expression evaluation result.

Throws:

ExpressionEvaluationException - Invalid expression evaluation (implementation specific).