Package com.intergral.deep.agent.api.plugin

Class AbstractEvaluator

java.lang.Object

com.intergral.deep.agent.api.plugin.AbstractEvaluator

All Implemented Interfaces:

IEvaluator

Direct Known Subclasses:

CFEvaluator, LazyEvaluator, NashornReflectEvaluator

public abstract class AbstractEvaluator
extends Object
implements IEvaluator

This allows for common handling for object to boolean expressions.

Constructor Summary

Constructors

Constructor	Description
AbstractEvaluator()

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(String expression, Map<String,Object> values)	Evaluate an expression as a boolean response.
static boolean	objectToBoolean(Object obj)	Given an input convert to a boolean expression.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.intergral.deep.agent.api.plugin.IEvaluator

evaluateExpression

Constructor Detail

AbstractEvaluator

public AbstractEvaluator()

Method Detail

evaluate

public boolean evaluate(String expression,
                        Map<String,Object> values)

Description copied from interface: IEvaluator

Evaluate an expression as a boolean response.

Specified by:

evaluate in interface IEvaluator

Parameters:

expression - the expression to evaluate

values - the variables that the expression can evaluate against

Returns:

true if the expression evaluates to truthy value.

See Also:

objectToBoolean(Object)

objectToBoolean

public static boolean objectToBoolean(Object obj)

Given an input convert to a boolean expression.

As Java doesn't have inherit truthiness such as JavaScript. We want to simulate it here, we will convert the following to inputs, all other inputs are true.

• null - All null values are false.
• boolean = All booleans are returned as they are.
• 0 = All numbers are true, except 0 which is false
• "true" = A string of the value "true" (ignoring case) is true, all other strings are false.

Parameters:

obj - the value to convert

Returns:

the value as a boolean

See Also:

Boolean.parseBoolean(String)