org.codehaus.groovy.grails.commons
Interface ArtefactHandler

All Known Implementing Classes:

ArtefactHandlerAdapter, BootstrapArtefactHandler, CodecArtefactHandler, ControllerArtefactHandler, DomainClassArtefactHandler, ServiceArtefactHandler, TagLibArtefactHandler, UrlMappingsArtefactHandler

public interface ArtefactHandler

The ArtefactHandler interface's purpose is to allow the analysis of conventions within a Grails application. An artefact is represented by the GrailsClass interface and this interface provides methods that allow artefacts to be identified, created and initialized.

Artefacts need to provide info about themselves, and some callbacks are required to verify whether or not a class is that kind of artefact/p>

Author:

Graeme Rocher, Marc Palmer (marc@anyware.co.uk)

See Also:

GrailsApplication.registerArtefactHandler(ArtefactHandler)

Method Summary

GrailsClass	getArtefactForFeature(Object feature) Called to retrieve an artefact relating to some other key for example a URI or tag name Handlers are responsible for caching the appropriate information using the data passed to them in calls to initialize()
String	getType() Implementations must return a name such as "Domain" to indicate the type of artefact they represent
void	initialize(ArtefactInfo artefacts) Called whenever the list of artefacts has changed or been reloaded.
boolean	isArtefact(Class aClass) This method will be called by the GrailsApplication whenever it needs to know if a given class is considered to be the kind of artefact represented by this handler.
boolean	isArtefactGrailsClass(GrailsClass artefactGrailsClass) Called to check if the specified GrailsClass is one managed by this artefact handler
GrailsClass	newArtefactClass(Class artefactClass) Called by GrailsApplication when a new class is found and a GrailsClass wrapping it is required

Method Detail

getType

String getType()

Implementations must return a name such as "Domain" to indicate the type of artefact they represent

Returns:

The aretfact type, as a String

isArtefact

boolean isArtefact(Class aClass)

This method will be called by the GrailsApplication whenever it needs to know if a given class is considered to be the kind of artefact represented by this handler.

Typically you will check the name of the class and some other properties to see if it is of the correct artefact type

Parameters:

aClass - A class to test

Returns:

True if the class looks like one of your artefacts

newArtefactClass

GrailsClass newArtefactClass(Class artefactClass)

Called by GrailsApplication when a new class is found and a GrailsClass wrapping it is required

Parameters:

artefactClass - The new class that has been loaded

Returns:

A new custom GrailsClass wrapper containing any extra information your artefact type requires

initialize

void initialize(ArtefactInfo artefacts)

Called whenever the list of artefacts has changed or been reloaded.

It must be safe to call this method multiple times and have any internal data structures reset.

Parameters:

artefacts - The collection of artefact classes for this handler

getArtefactForFeature

GrailsClass getArtefactForFeature(Object feature)

Called to retrieve an artefact relating to some other key for example a URI or tag name

Handlers are responsible for caching the appropriate information using the data passed to them in calls to initialize()

Parameters:

feature - Any object that acts as a key

Returns:

A matching artefact GrailsClass or null if there is no match for this feature ID

isArtefactGrailsClass

boolean isArtefactGrailsClass(GrailsClass artefactGrailsClass)

Called to check if the specified GrailsClass is one managed by this artefact handler

Parameters:

artefactGrailsClass - A GrailsClass instance

Returns:

True if this handler manages the specified GrailsClass