org.springframework.scripting
Interface ScriptFactory

All Known Implementing Classes:

BshScriptFactory, GroovyScriptFactory, JRubyScriptFactory

public interface ScriptFactory

Script definition interface, encapsulating the configuration of a specific script as well as a factory method for creating the actual scripted Java Object.

Since:

2.0

Author:

Juergen Hoeller, Rob Harrop

See Also:

getScriptSourceLocator(), getScriptedObject(org.springframework.scripting.ScriptSource, java.lang.Class[])

Method Summary

Object	getScriptedObject(ScriptSource scriptSource, Class[] actualInterfaces) Factory method for creating the scripted Java object.
Class	getScriptedObjectType(ScriptSource scriptSource) Determine the type of the scripted Java object.
Class[]	getScriptInterfaces() Return the business interfaces that the script is supposed to implement.
String	getScriptSourceLocator() Return a locator that points to the source of the script.
boolean	requiresConfigInterface() Return whether the script requires a config interface to be generated for it.
boolean	requiresScriptedObjectRefresh(ScriptSource scriptSource) Determine whether a refresh is required (e.g. through ScriptSource's isModified() method).

Method Detail

getScriptSourceLocator

String getScriptSourceLocator()

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...").

Returns:

the script source locator

See Also:

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

getScriptInterfaces

Class[] getScriptInterfaces()

Return the business interfaces that the script is supposed to implement.

Can return null if the script itself determines its Java interfaces (such as in the case of Groovy).

Returns:

the interfaces for the script

requiresConfigInterface

boolean requiresConfigInterface()

Return whether the script requires a config interface to be generated for it. This is typically the case for scripts that do not determine Java signatures themselves, with no appropriate config interface specified in getScriptInterfaces().

Returns:

whether the script requires a generated config interface

See Also:

getScriptInterfaces()

getScriptedObject

Object getScriptedObject(ScriptSource scriptSource,
                         Class[] actualInterfaces)
                         throws IOException,
                                ScriptCompilationException

Factory method for creating 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.

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

getScriptedObjectType

Class getScriptedObjectType(ScriptSource scriptSource)
                            throws IOException,
                                   ScriptCompilationException

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.

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

Since:

2.0.3

requiresScriptedObjectRefresh

boolean requiresScriptedObjectRefresh(ScriptSource scriptSource)

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

Parameters:

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

Returns:

whether a fresh getScriptedObject(org.springframework.scripting.ScriptSource, java.lang.Class[]) call is required

Since:

2.5.2

See Also:

ScriptSource.isModified()