org.springframework.scripting.groovy
Class GroovyScriptFactory

java.lang.Object
  extended by org.springframework.scripting.groovy.GroovyScriptFactory
All Implemented Interfaces:
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:
GroovyClassLoader, ScriptFactoryPostProcessor

Constructor Summary
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
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)
          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
 

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)
                    throws BeansException
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.
Throws:
BeansException - in case of initialization errors
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 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