org.springframework.scripting.groovy

Class GroovyScriptFactory

java.lang.Object

org.springframework.scripting.groovy.GroovyScriptFactory

All Implemented Interfaces:

org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanClassLoaderAware, org.springframework.beans.factory.BeanFactoryAware, ScriptFactory

public class GroovyScriptFactory
extends java.lang.Object
implements ScriptFactory, org.springframework.beans.factory.BeanFactoryAware, org.springframework.beans.factory.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(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

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.
groovy.lang.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)
void	setBeanFactory(org.springframework.beans.factory.BeanFactory beanFactory)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

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(org.springframework.beans.factory.BeanFactory beanFactory)
                    throws org.springframework.beans.BeansException

Specified by:

setBeanFactory in interface org.springframework.beans.factory.BeanFactoryAware

Throws:

org.springframework.beans.BeansException

setBeanClassLoader

public void setBeanClassLoader(java.lang.ClassLoader classLoader)

Specified by:

setBeanClassLoader in interface org.springframework.beans.factory.BeanClassLoaderAware

getGroovyClassLoader

public groovy.lang.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:

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