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 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.

Note: Spring 4.0 supports Groovy 1.8 and higher.

Since:

2.0

Author:

Juergen Hoeller, Rob Harrop, Rod Johnson

See Also:

GroovyClassLoader, ScriptFactoryPostProcessor

Constructor Summary

Constructors

Constructor and Description
GroovyScriptFactory(String scriptSourceLocator) Create a new GroovyScriptFactory for the given script source.
GroovyScriptFactory(String scriptSourceLocator, org.codehaus.groovy.control.customizers.CompilationCustomizer... compilationCustomizers) Create a new GroovyScriptFactory for the given script source, specifying a strategy interface that can customize Groovy's compilation process within the underlying GroovyClassLoader.
GroovyScriptFactory(String scriptSourceLocator, org.codehaus.groovy.control.CompilerConfiguration compilerConfiguration) 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.
GroovyScriptFactory(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

Modifier and Type	Method and Description
protected groovy.lang.GroovyClassLoader	buildGroovyClassLoader(ClassLoader classLoader) Build a GroovyClassLoader for the given ClassLoader.
protected Object	executeScript(ScriptSource scriptSource, Class<?> scriptClass) Instantiate the given Groovy script class and run it if necessary.
groovy.lang.GroovyClassLoader	getGroovyClassLoader() Return the GroovyClassLoader used by this script factory.
Object	getScriptedObject(ScriptSource scriptSource, Class<?>... actualInterfaces) Loads and parses the Groovy script via the GroovyClassLoader.
Class<?>	getScriptedObjectType(ScriptSource scriptSource) Determine the type of the scripted Java object.
Class<?>[]	getScriptInterfaces() Groovy scripts determine their interfaces themselves, hence we don't need to explicitly expose interfaces here.
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(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.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

GroovyScriptFactory

public GroovyScriptFactory(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(String scriptSourceLocator,
                           @Nullable
                           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.

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)

See Also:

GroovyObjectCustomizer.customize(groovy.lang.GroovyObject)

GroovyScriptFactory

public GroovyScriptFactory(String scriptSourceLocator,
                           @Nullable
                           org.codehaus.groovy.control.CompilerConfiguration compilerConfiguration)

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.

Parameters:

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

compilerConfiguration - a custom compiler configuration to be applied to the GroovyClassLoader (may be null)

Since:

4.3.3

See Also:

GroovyClassLoader.GroovyClassLoader(ClassLoader, CompilerConfiguration)

GroovyScriptFactory

public GroovyScriptFactory(String scriptSourceLocator,
                           org.codehaus.groovy.control.customizers.CompilationCustomizer... compilationCustomizers)

Create a new GroovyScriptFactory for the given script source, specifying a strategy interface that can customize Groovy's compilation process within the underlying GroovyClassLoader.

Parameters:

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

compilationCustomizers - one or more customizers to be applied to the GroovyClassLoader compiler configuration

Since:

4.3.3

See Also:

CompilerConfiguration.addCompilationCustomizers(org.codehaus.groovy.control.customizers.CompilationCustomizer...), ImportCustomizer

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(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

getGroovyClassLoader

public groovy.lang.GroovyClassLoader getGroovyClassLoader()

Return the GroovyClassLoader used by this script factory.

buildGroovyClassLoader

protected groovy.lang.GroovyClassLoader buildGroovyClassLoader(@Nullable
                                                               ClassLoader classLoader)

Build a GroovyClassLoader for the given ClassLoader.

Parameters:

classLoader - the ClassLoader to build a GroovyClassLoader for

Since:

4.3.3

getScriptSourceLocator

public 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

@Nullable
public 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

@Nullable
public Object getScriptedObject(ScriptSource scriptSource,
                                          @Nullable
                                          Class<?>... actualInterfaces)
                                   throws 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:

IOException - if script retrieval failed

ScriptCompilationException - if script compilation failed

See Also:

GroovyClassLoader

getScriptedObjectType

@Nullable
public Class<?> getScriptedObjectType(ScriptSource scriptSource)
                                         throws 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:

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

@Nullable
protected Object executeScript(ScriptSource scriptSource,
                                         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 String toString()

Overrides:

toString in class Object