org.oddjob.arooa.runtime

Class ScriptEvaluator

java.lang.Object

org.oddjob.arooa.runtime.ScriptEvaluator

All Implemented Interfaces:

Evaluator

public class ScriptEvaluator
extends Object
implements Evaluator

Evaluate an expression as a script using the Java Scripting API (defined by JSR 223).

The script language can be set with the system property SCRIPT_LANGUAGE_PROPERTY, it defaults to JavaScript.

This is the default Script Evaluator. An alternative can be set by providing an ScriptEvaluatorProvider as a Service.

With JDK 11 you get a warning about Nashorn deprecation. This can suppressed with -Dnashorn.args=--no-deprecation-warning or including the Nashorn jar explicitly in the classpath. Building from source with JDK 9+ will do this.

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_SCRIPT_LANGUAGE
static String	SCRIPT_LANGUAGE_PROPERTY

Method Summary

Modifier and Type	Method and Description
static ScriptEvaluatorProvider	asScriptEvaluatorProvider()
<T> T	evaluate(String propertyExpression, ArooaSession session, Class<T> type) Evaluate the property expression.
static ScriptEvaluator	getDefault()
static Try<ScriptEvaluator>	getDefault(ClassLoader classLoader)
static Try<ScriptEngine>	getDefaultEngine(ClassLoader classLoader)
static Try<ScriptEngine>	getEngineByName(ClassLoader classLoader, String language)

Methods inherited from class java.lang.Object

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

Field Detail

SCRIPT_LANGUAGE_PROPERTY

public static final String SCRIPT_LANGUAGE_PROPERTY

See Also:

Constant Field Values

DEFAULT_SCRIPT_LANGUAGE

public static final String DEFAULT_SCRIPT_LANGUAGE

See Also:

Constant Field Values

Method Detail

asScriptEvaluatorProvider

public static ScriptEvaluatorProvider asScriptEvaluatorProvider()

evaluate

public <T> T evaluate(String propertyExpression,
                      ArooaSession session,
                      Class<T> type)
               throws ArooaPropertyException,
                      ArooaConversionException

Description copied from interface: Evaluator

Evaluate the property expression.

Specified by:

evaluate in interface Evaluator

Parameters:

propertyExpression - The property expression such as a.b.c.

Returns:

The evaluation.

Throws:

ArooaPropertyException

ArooaConversionException

getDefault

public static ScriptEvaluator getDefault()

getDefault

public static Try<ScriptEvaluator> getDefault(ClassLoader classLoader)

getDefaultEngine

public static Try<ScriptEngine> getDefaultEngine(ClassLoader classLoader)

getEngineByName

public static Try<ScriptEngine> getEngineByName(ClassLoader classLoader,
                                                String language)