org.springframework.scripting.support

Class StandardScriptEvaluator

java.lang.Object

org.springframework.scripting.support.StandardScriptEvaluator

All Implemented Interfaces:

Aware, BeanClassLoaderAware, ScriptEvaluator

public class StandardScriptEvaluator
extends Object
implements ScriptEvaluator, BeanClassLoaderAware

javax.script (JSR-223) based implementation of Spring's ScriptEvaluator strategy interface.

Since:

4.0

Author:

Juergen Hoeller, Costin Leau

See Also:

ScriptEngine.eval(String)

Constructor Summary

Constructors

Constructor and Description
StandardScriptEvaluator() Construct a new StandardScriptEvaluator.
StandardScriptEvaluator(ClassLoader classLoader) Construct a new StandardScriptEvaluator.

Method Summary

Modifier and Type	Method and Description
Object	evaluate(ScriptSource script) Evaluate the given script.
Object	evaluate(ScriptSource script, Map<String,Object> arguments) Evaluate the given script with the given arguments.
protected ScriptEngine	getScriptEngine(ScriptSource script) Obtain the JSR-223 ScriptEngine to use for the given script.
void	setBeanClassLoader(ClassLoader classLoader) Callback that supplies the bean class loader to a bean instance.
void	setLanguage(String language) Set the name of language meant for evaluation the scripts (e.g.

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardScriptEvaluator

public StandardScriptEvaluator()

Construct a new StandardScriptEvaluator.

StandardScriptEvaluator

public StandardScriptEvaluator(ClassLoader classLoader)

Construct a new StandardScriptEvaluator.

Parameters:

classLoader - the class loader to use for script engine detection

Method Detail

setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

Description copied from interface: BeanClassLoaderAware

Callback that supplies the bean class loader to a bean instance.

Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean's InitializingBean.afterPropertiesSet() method or a custom init-method.

Specified by:

setBeanClassLoader in interface BeanClassLoaderAware

Parameters:

classLoader - the owning class loader; may be null in which case a default ClassLoader must be used, for example the ClassLoader obtained via ClassUtils.getDefaultClassLoader()

setLanguage

public void setLanguage(String language)

Set the name of language meant for evaluation the scripts (e.g. "Groovy").

evaluate

public Object evaluate(ScriptSource script)

Description copied from interface: ScriptEvaluator

Evaluate the given script.

Specified by:

evaluate in interface ScriptEvaluator

Parameters:

script - the ScriptSource for the script to evaluate

Returns:

the return value of the script, if any

evaluate

public Object evaluate(ScriptSource script,
                       Map<String,Object> arguments)

Description copied from interface: ScriptEvaluator

Evaluate the given script with the given arguments.

Specified by:

evaluate in interface ScriptEvaluator

Parameters:

script - the ScriptSource for the script to evaluate

arguments - the key-value pairs to expose to the script, typically as script variables (may be null or empty)

Returns:

the return value of the script, if any

getScriptEngine

protected ScriptEngine getScriptEngine(ScriptSource script)

Obtain the JSR-223 ScriptEngine to use for the given script.

Parameters:

script - the script to evaluate

Returns:

the ScriptEngine (never null)