org.springframework.scripting.groovy

Class GroovyScriptFactory

java.lang.Object

org.springframework.scripting.groovy.GroovyScriptFactory

All Implemented Interfaces:

Aware, BeanClassLoaderAware, BeanFactoryAware, ScriptFactory

public class GroovyScriptFactory
extends java.lang.Object
implements ScriptFactory, BeanFactoryAware, BeanClassLoaderAware

ScriptFactory implementation for a Groovy script.

Typically used in combination with a ScriptFactoryPostProcessor; see the latter's javadoc} for a configuration example.

Since:

2.0

Author:

Juergen Hoeller, Rob Harrop, Rod Johnson

See Also:

groovy.lang.GroovyClassLoader, ScriptFactoryPostProcessor

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	GroovyScriptFactory.CachedResultHolder Wrapper that holds a temporarily cached result object.

Field Summary

Fields

Modifier and Type	Field and Description
private GroovyScriptFactory.CachedResultHolder	cachedResult
private GroovyClassLoader	groovyClassLoader
private GroovyObjectCustomizer	groovyObjectCustomizer
private java.lang.Class<?>	scriptClass
private java.lang.Object	scriptClassMonitor
private java.lang.Class<?>	scriptResultClass
private java.lang.String	scriptSourceLocator
private boolean	wasModifiedForTypeCheck

Constructor Summary

Constructors

Constructor and Description
GroovyScriptFactory(java.lang.String scriptSourceLocator) Create a new GroovyScriptFactory for the given script source.
GroovyScriptFactory(java.lang.String scriptSourceLocator, GroovyObjectCustomizer groovyObjectCustomizer) Create a new GroovyScriptFactory for the given script source, specifying a strategy interface that can create a custom MetaClass to supply missing methods and otherwise change the behavior of the object.

Method Summary

Methods

Modifier and Type	Method and Description
protected java.lang.Object	executeScript(ScriptSource scriptSource, java.lang.Class<?> scriptClass) Instantiate the given Groovy script class and run it if necessary.
GroovyClassLoader	getGroovyClassLoader() Return the GroovyClassLoader used by this script factory.
java.lang.Object	getScriptedObject(ScriptSource scriptSource, java.lang.Class<?>... actualInterfaces) Loads and parses the Groovy script via the GroovyClassLoader.
java.lang.Class<?>	getScriptedObjectType(ScriptSource scriptSource) Determine the type of the scripted Java object.
java.lang.Class<?>[]	getScriptInterfaces() Groovy scripts determine their interfaces themselves, hence we don't need to explicitly expose interfaces here.
java.lang.String	getScriptSourceLocator() Return a locator that points to the source of the script.
boolean	requiresConfigInterface() Groovy scripts do not need a config interface, since they expose their setters as public methods.
boolean	requiresScriptedObjectRefresh(ScriptSource scriptSource) Determine whether a refresh is required (e.g.
void	setBeanClassLoader(java.lang.ClassLoader classLoader) Callback that supplies the bean class loader to a bean instance.
void	setBeanFactory(BeanFactory beanFactory) Callback that supplies the owning factory to a bean instance.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

scriptSourceLocator

private final java.lang.String scriptSourceLocator

groovyObjectCustomizer

private final GroovyObjectCustomizer groovyObjectCustomizer

groovyClassLoader

private GroovyClassLoader groovyClassLoader

scriptClass

private java.lang.Class<?> scriptClass

scriptResultClass

private java.lang.Class<?> scriptResultClass

cachedResult

private GroovyScriptFactory.CachedResultHolder cachedResult

scriptClassMonitor

private final java.lang.Object scriptClassMonitor

wasModifiedForTypeCheck

private boolean wasModifiedForTypeCheck

Constructor Detail

GroovyScriptFactory

public GroovyScriptFactory(java.lang.String scriptSourceLocator)

Create a new GroovyScriptFactory for the given script source.

We don't need to specify script interfaces here, since a Groovy script defines its Java interfaces itself.

Parameters:

scriptSourceLocator - a locator that points to the source of the script. Interpreted by the post-processor that actually creates the script.

GroovyScriptFactory

public GroovyScriptFactory(java.lang.String scriptSourceLocator,
                   GroovyObjectCustomizer groovyObjectCustomizer)

Create a new GroovyScriptFactory for the given script source, specifying a strategy interface that can create a custom MetaClass to supply missing methods and otherwise change the behavior of the object.

We don't need to specify script interfaces here, since a Groovy script defines its Java interfaces itself.

Parameters:

scriptSourceLocator - a locator that points to the source of the script. Interpreted by the post-processor that actually creates the script.

groovyObjectCustomizer - a customizer that can set a custom metaclass or make other changes to the GroovyObject created by this factory (may be null)

Method Detail

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)

Description copied from interface: BeanFactoryAware

Callback that supplies the owning factory to a bean instance.

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

Specified by:

setBeanFactory in interface BeanFactoryAware

Parameters:

beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.

See Also:

BeanInitializationException

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()

getGroovyClassLoader

public GroovyClassLoader getGroovyClassLoader()

Return the GroovyClassLoader used by this script factory.

getScriptSourceLocator

public java.lang.String getScriptSourceLocator()

Description copied from interface: ScriptFactory

Return a locator that points to the source of the script. Interpreted by the post-processor that actually creates the script.

Typical supported locators are Spring resource locations (such as "file:C:/myScript.bsh" or "classpath:myPackage/myScript.bsh") and inline scripts ("inline:myScriptText...").

Specified by:

getScriptSourceLocator in interface ScriptFactory

Returns:

the script source locator

See Also:

ScriptFactoryPostProcessor.convertToScriptSource(java.lang.String, java.lang.String, org.springframework.core.io.ResourceLoader), ResourceLoader

getScriptInterfaces

public java.lang.Class<?>[] getScriptInterfaces()

Groovy scripts determine their interfaces themselves, hence we don't need to explicitly expose interfaces here.

Specified by:

getScriptInterfaces in interface ScriptFactory

Returns:

null always

requiresConfigInterface

public boolean requiresConfigInterface()

Groovy scripts do not need a config interface, since they expose their setters as public methods.

Specified by:

requiresConfigInterface in interface ScriptFactory

Returns:

whether the script requires a generated config interface

See Also:

ScriptFactory.getScriptInterfaces()

getScriptedObject

public java.lang.Object getScriptedObject(ScriptSource scriptSource,
                                 java.lang.Class<?>... actualInterfaces)
                                   throws java.io.IOException,
                                          ScriptCompilationException

Loads and parses the Groovy script via the GroovyClassLoader.

Specified by:

getScriptedObject in interface ScriptFactory

Parameters:

scriptSource - the actual ScriptSource to retrieve the script source text from (never null)

actualInterfaces - the actual interfaces to expose, including script interfaces as well as a generated config interface (if applicable; may be null)

Returns:

the scripted Java object

Throws:

java.io.IOException - if script retrieval failed

ScriptCompilationException - if script compilation failed

See Also:

groovy.lang.GroovyClassLoader

getScriptedObjectType

public java.lang.Class<?> getScriptedObjectType(ScriptSource scriptSource)
                                         throws java.io.IOException,
                                                ScriptCompilationException

Description copied from interface: ScriptFactory

Determine the type of the scripted Java object.

Implementations are encouraged to cache script metadata such as a generated script class. Note that this method may be invoked concurrently and must be implemented in a thread-safe fashion.

Specified by:

getScriptedObjectType in interface ScriptFactory

Parameters:

scriptSource - the actual ScriptSource to retrieve the script source text from (never null)

Returns:

the type of the scripted Java object, or null if none could be determined

Throws:

java.io.IOException - if script retrieval failed

ScriptCompilationException - if script compilation failed

requiresScriptedObjectRefresh

public boolean requiresScriptedObjectRefresh(ScriptSource scriptSource)

Description copied from interface: ScriptFactory

Determine whether a refresh is required (e.g. through ScriptSource's isModified() method).

Specified by:

requiresScriptedObjectRefresh in interface ScriptFactory

Parameters:

scriptSource - the actual ScriptSource to retrieve the script source text from (never null)

Returns:

whether a fresh ScriptFactory.getScriptedObject(org.springframework.scripting.ScriptSource, java.lang.Class<?>...) call is required

See Also:

ScriptSource.isModified()

executeScript

protected java.lang.Object executeScript(ScriptSource scriptSource,
                             java.lang.Class<?> scriptClass)
                                  throws ScriptCompilationException

Instantiate the given Groovy script class and run it if necessary.

Parameters:

scriptSource - the source for the underlying script

scriptClass - the Groovy script class

Returns:

the result object (either an instance of the script class or the result of running the script instance)

Throws:

ScriptCompilationException - in case of instantiation failure

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object