org.springframework.scripting.support

Class StandardScriptEvaluator

java.lang.Object

org.springframework.scripting.support.StandardScriptEvaluator

All Implemented Interfaces:

Aware, BeanClassLoaderAware, ScriptEvaluator

public class StandardScriptEvaluator
extends java.lang.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)

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	engineName
private javax.script.ScriptEngineManager	scriptEngineManager

Constructor Summary

Constructors

Constructor and Description
StandardScriptEvaluator() Construct a new StandardScriptEvaluator.
StandardScriptEvaluator(java.lang.ClassLoader classLoader) Construct a new StandardScriptEvaluator for the given class loader.
StandardScriptEvaluator(javax.script.ScriptEngineManager scriptEngineManager) Construct a new StandardScriptEvaluator for the given JSR-223 ScriptEngineManager to obtain script engines from.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(ScriptSource script) Evaluate the given script.
java.lang.Object	evaluate(ScriptSource script, java.util.Map<java.lang.String,java.lang.Object> argumentBindings) Evaluate the given script with the given arguments.
protected javax.script.ScriptEngine	getScriptEngine(ScriptSource script) Obtain the JSR-223 ScriptEngine to use for the given script.
void	setBeanClassLoader(java.lang.ClassLoader classLoader) Callback that supplies the bean class loader to a bean instance.
void	setEngineName(java.lang.String engineName) Set the name of the script engine for evaluating the scripts (e.g.
void	setGlobalBindings(java.util.Map<java.lang.String,java.lang.Object> globalBindings) Set the globally scoped bindings on the underlying script engine manager, shared by all scripts, as an alternative to script argument bindings.
void	setLanguage(java.lang.String language) Set the name of the language meant for evaluating the scripts (e.g.

Methods inherited from class java.lang.Object

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

Field Detail

scriptEngineManager

private volatile javax.script.ScriptEngineManager scriptEngineManager

engineName

private java.lang.String engineName

Constructor Detail

StandardScriptEvaluator

public StandardScriptEvaluator()

Construct a new StandardScriptEvaluator.

StandardScriptEvaluator

public StandardScriptEvaluator(java.lang.ClassLoader classLoader)

Construct a new StandardScriptEvaluator for the given class loader.

Parameters:

classLoader - the class loader to use for script engine detection

StandardScriptEvaluator

public StandardScriptEvaluator(javax.script.ScriptEngineManager scriptEngineManager)

Construct a new StandardScriptEvaluator for the given JSR-223 ScriptEngineManager to obtain script engines from.

Parameters:

scriptEngineManager - the ScriptEngineManager (or subclass thereof) to use

Since:

4.2.2

Method Detail

setLanguage

public void setLanguage(java.lang.String language)

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

This is effectively an alias for "engineName", potentially (but not yet) providing common abbreviations for certain languages beyond what the JSR-223 script engine factory exposes.

See Also:

setEngineName(java.lang.String)

setEngineName

public void setEngineName(java.lang.String engineName)

Set the name of the script engine for evaluating the scripts (e.g. "Groovy"), as exposed by the JSR-223 script engine factory.

Since:

4.2.2

See Also:

setLanguage(java.lang.String)

setGlobalBindings

public void setGlobalBindings(java.util.Map<java.lang.String,java.lang.Object> globalBindings)

Set the globally scoped bindings on the underlying script engine manager, shared by all scripts, as an alternative to script argument bindings.

Since:

4.2.2

See Also:

evaluate(ScriptSource, Map), ScriptEngineManager.setBindings(Bindings), SimpleBindings

setBeanClassLoader

public void setBeanClassLoader(java.lang.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()

evaluate

public java.lang.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 java.lang.Object evaluate(ScriptSource script,
                                 java.util.Map<java.lang.String,java.lang.Object> argumentBindings)

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

argumentBindings - 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 javax.script.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)