io.engineblock.scripting

Class NashornEvaluator<T>

java.lang.Object

io.engineblock.scripting.NashornEvaluator<T>

Type Parameters:

T - generic parameter for return types from this evaluator

All Implemented Interfaces:

Evaluator<T>

public class NashornEvaluator<T>
extends Object
implements Evaluator<T>

public void setBindings(Bindings bindings, int scope);

Constructor Summary

Constructors

Constructor and Description
NashornEvaluator(Class<? extends T> resultType, Object... vars) Create a new NashornEvaluator.

Method Summary

Modifier and Type	Method and Description
T	eval() Evaluate the compiled script if it is compiled, or the raw script text otherwise.
NashornEvaluator<T>	put(String varName, Object var) Put a varianble into the script environment
NashornEvaluator<T>	script(String scriptText) Set the script that will be evaluated.

Methods inherited from class java.lang.Object

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

Constructor Detail

NashornEvaluator

public NashornEvaluator(Class<? extends T> resultType,
                        Object... vars)

Create a new NashornEvaluator.

Parameters:

resultType - The required class of the result type, which must extend generic parameter type t.

vars - Optional pairs of names and values. vars[0] is a name, vars[1] is a value, ...

Method Detail

script

public NashornEvaluator<T> script(String scriptText)

Set the script that will be evaluated.

Specified by:

script in interface Evaluator<T>

Parameters:

scriptText - Nashorn compatible script text

Returns:

this NashornEvaluator, for method chaining

eval

public T eval()

Evaluate the compiled script if it is compiled, or the raw script text otherwise. It is not an error to call this without setting the script to something other than the default of "", but it not very useful in most cases.

Specified by:

eval in interface Evaluator<T>

Returns:

The value produced by the script, compiled or not

put

public NashornEvaluator<T> put(String varName,
                               Object var)

Put a varianble into the script environment

Specified by:

put in interface Evaluator<T>

Parameters:

varName - the variable name to add to the environment

var - the object to bind to the varname

Returns:

this NashornEvaluator, for method chaining