org.codehaus.groovy.grails.commons
Class DefaultGrailsApplication

java.lang.Object
  groovy.lang.GroovyObjectSupport
      org.codehaus.groovy.grails.commons.DefaultGrailsApplication

All Implemented Interfaces:

groovy.lang.GroovyObject, GrailsApplication, BeanClassLoaderAware, ApplicationContextAware

public class DefaultGrailsApplication
extends groovy.lang.GroovyObjectSupport
implements GrailsApplication, BeanClassLoaderAware

Default implementation of the GrailsApplication interface that manages application loading, state, and artefact instances.

Upon loading this GrailsApplication will inspect each class using its registered ArtefactHandler instances. Each ArtefactHandler provides knowledge about the conventions used to establish its artefact type. For example controllers use the ControllerArtefactHandler to establish this knowledge.

New ArtefactHandler instances can be registered with the GrailsApplication thus allowing application extensibility.

Since:

0.1

Created: Jul 2, 2005

Author:

Marc Palmer, Steven Devijver, Graeme Rocher

See Also:

GrailsPluginManager, DefaultGrailsPluginManager, ArtefactHandler, ArtefactInfo

Field Summary

Fields inherited from interface org.codehaus.groovy.grails.commons.GrailsApplication

APPLICATION_ID, CONFIG_CLASS, ENV_APPLICATION, ENV_DEVELOPMENT, ENV_PRODUCTION, ENV_TEST, ENVIRONMENT, PROJECT_CLASSES_DIR, PROJECT_RESOURCES_DIR, PROJECT_TEST_CLASSES_DIR, WORK_DIR

Constructor Summary

DefaultGrailsApplication()
Creates a new empty Grails application

DefaultGrailsApplication(Class[] classes, groovy.lang.GroovyClassLoader classLoader)
Creates a new GrailsApplication instance using the given classes and GroovyClassLoader

DefaultGrailsApplication(GrailsResourceLoader resourceLoader)

DefaultGrailsApplication(Resource[] resources)
Constructs a GrailsApplication with the given set of groovy sources specified as Spring Resource instances

Method Summary

void	addArtefact(Class artefact) Adds the given artefact, attempting to determine type from
GrailsClass	addArtefact(String artefactType, Class artefactClass) Adds an artefact of the given type for the given Class.
GrailsClass	addArtefact(String artefactType, GrailsClass artefactGrailsClass) Adds an artefact of the given type for the given GrailsClass.
Class[]	getAllArtefacts() Returns all the classes identified as artefacts by ArtefactHandler instances
Class[]	getAllClasses() Retrieves all classes loaded by the GrailsApplication
GrailsClass	getArtefact(String artefactType, String name) Retrieves an artefact for the given type and nam
GrailsClass	getArtefactByLogicalPropertyName(String type, String logicalName) Retrieves an artefact by its logical property name.
GrailsClass	getArtefactForFeature(String artefactType, Object featureID) Get an artefact GrailsClass by a "feature" which depending on the artefact may be a URI or tag name for example
ArtefactHandler[]	getArtefactHandlers() Obtain a list of all the artefact handlers
ArtefactInfo	getArtefactInfo(String artefactType) Get the cache of classes for the specified artefact type
GrailsClass[]	getArtefacts(String artefactType) Returns all of the GrailsClass instances for the given artefactType as defined by the ArtefactHandler
Class	getClassForName(String className) Retrieves a class from the GrailsApplication for the given name
groovy.lang.GroovyClassLoader	getClassLoader() Returns the class loader instance for the Grails application
groovy.util.ConfigObject	getConfig() Returns the ConfigObject instance
Map	getMetadata() Get access to the project's metadata, specified in application.properties This provides access to information like required grails version, application name, version etc but NOT general application settings.
ApplicationContext	getParentContext() Retrieves the parent ApplicationContext for this GrailsApplication
Object	getProperty(String propertyName) Override property access and hit on xxxxClasses to return class arrays of artefacts
Resource	getResourceForClass(Class theClazz) Retrieves the Spring Resource that was used to load the given Class
GrailsResourceLoader	getResourceLoader()
GrailsControllerClass	getScaffoldingController(GrailsDomainClass domainClass) Retrieves the controller that is scaffolding the specified domain class
void	initialise() Initialise this GrailsApplication
Object	invokeMethod(String methodName, Object args) Overrides method invocation to return dynamic artefact methods We will support getXXXXClasses() and isXXXXClass(class)
boolean	isArtefact(Class theClazz) Returns true if the given class is an artefact identified by one of the registered ArtefactHandler instances.
boolean	isArtefactOfType(String artefactType, Class theClazz) Returns true if the specified class is of the given artefact type as defined by the ArtefactHandler
boolean	isArtefactOfType(String artefactType, String className) Returns true if the specified class name is of the given artefact type as defined by the ArtefactHandler
boolean	isInitialised() Returns whether this GrailsApplication has been initialised or not
boolean	isWarDeployed() Returns true if this application has been deployed as a WAR file
protected Map	loadMetadata()
void	rebuild() Rebuilds this Application throwing away the class loader and re-constructing it from the loaded resources again.
void	refresh() Refreshes this GrailsApplication, rebuilding all of the artefact definitions as defined by the registered ArtefactHandler instances
void	refreshConstraints() Refreshes constraints defined by the DomainClassArtefactHandler
void	registerArtefactHandler(ArtefactHandler handler) Registers a new ArtefactHandler that is responsible for identifying and managing an particular artefact type that is defined by some convention
void	setApplicationContext(ApplicationContext applicationContext) Sets the parent ApplicationContext for the GrailsApplication
void	setBeanClassLoader(ClassLoader classLoader)

Methods inherited from class groovy.lang.GroovyObjectSupport

getMetaClass, setMetaClass, setProperty

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultGrailsApplication

public DefaultGrailsApplication()

Creates a new empty Grails application

DefaultGrailsApplication

public DefaultGrailsApplication(Class[] classes,
                                groovy.lang.GroovyClassLoader classLoader)

Creates a new GrailsApplication instance using the given classes and GroovyClassLoader

Parameters:

classes - The classes that make up the GrailsApplication

classLoader - The GroovyClassLoader to use

DefaultGrailsApplication

public DefaultGrailsApplication(Resource[] resources)
                         throws IOException

Constructs a GrailsApplication with the given set of groovy sources specified as Spring Resource instances

Parameters:

resources - An array or Groovy sources provides by Spring Resource instances

Throws:

IOException - Thrown when an error occurs reading a Groovy source

DefaultGrailsApplication

public DefaultGrailsApplication(GrailsResourceLoader resourceLoader)

Method Detail

loadMetadata

protected Map loadMetadata()

getAllArtefacts

public Class[] getAllArtefacts()

Returns all the classes identified as artefacts by ArtefactHandler instances

Specified by:

getAllArtefacts in interface GrailsApplication

Returns:

An array of classes

getScaffoldingController

public GrailsControllerClass getScaffoldingController(GrailsDomainClass domainClass)

Description copied from interface: GrailsApplication

Retrieves the controller that is scaffolding the specified domain class

Specified by:

getScaffoldingController in interface GrailsApplication

Parameters:

domainClass - The domain class to check

Returns:

An instance of GrailsControllerClass

getResourceLoader

public GrailsResourceLoader getResourceLoader()

getClassLoader

public groovy.lang.GroovyClassLoader getClassLoader()

Description copied from interface: GrailsApplication

Returns the class loader instance for the Grails application

Specified by:

getClassLoader in interface GrailsApplication

Returns:

The GroovyClassLoader instance

getConfig

public groovy.util.ConfigObject getConfig()

Description copied from interface: GrailsApplication

Returns the ConfigObject instance

Specified by:

getConfig in interface GrailsApplication

Returns:

The ConfigObject instance

getAllClasses

public Class[] getAllClasses()

Retrieves all classes loaded by the GrailsApplication

Specified by:

getAllClasses in interface GrailsApplication

Returns:

All classes loaded by the GrailsApplication

setApplicationContext

public void setApplicationContext(ApplicationContext applicationContext)
                           throws BeansException

Sets the parent ApplicationContext for the GrailsApplication

Specified by:

setApplicationContext in interface ApplicationContextAware

Parameters:

applicationContext - The ApplicationContext

Throws:

BeansException - Thrown when an error occurs setting the ApplicationContext

getParentContext

public ApplicationContext getParentContext()

Retrieves the parent ApplicationContext for this GrailsApplication

Specified by:

getParentContext in interface GrailsApplication

Returns:

The parent ApplicationContext

getClassForName

public Class getClassForName(String className)

Retrieves a class from the GrailsApplication for the given name

Specified by:

getClassForName in interface GrailsApplication

Parameters:

className - The class name

Returns:

Either the java.lang.Class instance or null if it doesn't exist

refreshConstraints

public void refreshConstraints()

Refreshes constraints defined by the DomainClassArtefactHandler

Specified by:

refreshConstraints in interface GrailsApplication

To do:

Move this out of GrailsApplication

refresh

public void refresh()

Refreshes this GrailsApplication, rebuilding all of the artefact definitions as defined by the registered ArtefactHandler instances

Specified by:

refresh in interface GrailsApplication

rebuild

public void rebuild()

Description copied from interface: GrailsApplication

Rebuilds this Application throwing away the class loader and re-constructing it from the loaded resources again. This method can only be called in development mode and an error will be thrown if called in a different enivronment

Specified by:

rebuild in interface GrailsApplication

getResourceForClass

public Resource getResourceForClass(Class theClazz)

Retrieves the Spring Resource that was used to load the given Class

Specified by:

getResourceForClass in interface GrailsApplication

Parameters:

theClazz - The class

Returns:

Either a Spring Resource or null if no Resource was found for the given class

isArtefact

public boolean isArtefact(Class theClazz)

Returns true if the given class is an artefact identified by one of the registered ArtefactHandler instances. Uses class name equality to handle class reloading

Specified by:

isArtefact in interface GrailsApplication

Parameters:

theClazz - The class to check

Returns:

True if it is an artefact

isArtefactOfType

public boolean isArtefactOfType(String artefactType,
                                Class theClazz)

Returns true if the specified class is of the given artefact type as defined by the ArtefactHandler

Specified by:

isArtefactOfType in interface GrailsApplication

Parameters:

artefactType - The type of the artefact

theClazz - The class

Returns:

True if it is of the specified artefactType

See Also:

ArtefactHandler

isArtefactOfType

public boolean isArtefactOfType(String artefactType,
                                String className)

Returns true if the specified class name is of the given artefact type as defined by the ArtefactHandler

Specified by:

isArtefactOfType in interface GrailsApplication

Parameters:

artefactType - The type of the artefact

className - The class name

Returns:

True if it is of the specified artefactType

See Also:

ArtefactHandler

getArtefact

public GrailsClass getArtefact(String artefactType,
                               String name)

Retrieves an artefact for the given type and nam

Specified by:

getArtefact in interface GrailsApplication

Parameters:

artefactType - The artefact type as defined by a registered ArtefactHandler

name - The name of the class

Returns:

A GrailsClass instance or null if none could be found for the given artefactType and name

getArtefacts

public GrailsClass[] getArtefacts(String artefactType)

Returns all of the GrailsClass instances for the given artefactType as defined by the ArtefactHandler

Specified by:

getArtefacts in interface GrailsApplication

Parameters:

artefactType - The type of the artefact defined by the ArtefactHandler

Returns:

An array of classes for the given artefact

getArtefactForFeature

public GrailsClass getArtefactForFeature(String artefactType,
                                         Object featureID)

Description copied from interface: GrailsApplication

Get an artefact GrailsClass by a "feature" which depending on the artefact may be a URI or tag name for example

Specified by:

getArtefactForFeature in interface GrailsApplication

Parameters:

artefactType - The type ID of the artefact, i.e. "TagLib"

featureID - The "feature" ID, say a URL or tag name

Returns:

The grails class or null if none is found

addArtefact

public GrailsClass addArtefact(String artefactType,
                               Class artefactClass)

Adds an artefact of the given type for the given Class.

Specified by:

addArtefact in interface GrailsApplication

Parameters:

artefactType - The type of the artefact as defined by a ArtefactHandler instance

artefactClass - A Class instance that matches the type defined by the ArtefactHandler

Returns:

The GrailsClass if successful or null if it couldn't be added

Throws:

GrailsConfigurationException - If the specified Class is not the same as the type defined by the ArtefactHandler

See Also:

ArtefactHandler

addArtefact

public GrailsClass addArtefact(String artefactType,
                               GrailsClass artefactGrailsClass)

Adds an artefact of the given type for the given GrailsClass.

Specified by:

addArtefact in interface GrailsApplication

Parameters:

artefactType - The type of the artefact as defined by a ArtefactHandler instance

artefactGrailsClass - A GrailsClass instance that matches the type defined by the ArtefactHandler

Returns:

The GrailsClass if successful or null if it couldn't be added

Throws:

GrailsConfigurationException - If the specified GrailsClass is not the same as the type defined by the ArtefactHandler

See Also:

ArtefactHandler

registerArtefactHandler

public void registerArtefactHandler(ArtefactHandler handler)

Registers a new ArtefactHandler that is responsible for identifying and managing an particular artefact type that is defined by some convention

Specified by:

registerArtefactHandler in interface GrailsApplication

Parameters:

handler - The ArtefactHandler to regster

getArtefactHandlers

public ArtefactHandler[] getArtefactHandlers()

Description copied from interface: GrailsApplication

Obtain a list of all the artefact handlers

Specified by:

getArtefactHandlers in interface GrailsApplication

Returns:

The list, possible empty but not null, of all currently registered handlers

getArtefactInfo

public ArtefactInfo getArtefactInfo(String artefactType)

Get the cache of classes for the specified artefact type

Specified by:

getArtefactInfo in interface GrailsApplication

Parameters:

artefactType - The name of an artefact type

Returns:

The cache of classes for the type, or null if no cache exists

invokeMethod

public Object invokeMethod(String methodName,
                           Object args)

Overrides method invocation to return dynamic artefact methods

We will support getXXXXClasses() and isXXXXClass(class)

Specified by:

invokeMethod in interface groovy.lang.GroovyObject

Overrides:

invokeMethod in class groovy.lang.GroovyObjectSupport

Parameters:

methodName - The name of the method

args - The arguments to the method

Returns:

The return value of the method

To do:

this is REALLY ugly, Need to add matches for addClass(java.lang.Class) and addClass(GrailsClass)

getProperty

public Object getProperty(String propertyName)

Override property access and hit on xxxxClasses to return class arrays of artefacts

Specified by:

getProperty in interface groovy.lang.GroovyObject

Overrides:

getProperty in class groovy.lang.GroovyObjectSupport

Parameters:

propertyName - The name of the property, if it ends in *Classes then match and invoke internal ArtefactHandler

Returns:

All the artifacts or delegate to super.getProperty

initialise

public void initialise()

Description copied from interface: GrailsApplication

Initialise this GrailsApplication

Specified by:

initialise in interface GrailsApplication

isInitialised

public boolean isInitialised()

Description copied from interface: GrailsApplication

Returns whether this GrailsApplication has been initialised or not

Specified by:

isInitialised in interface GrailsApplication

Returns:

True if it has been initialised

getMetadata

public Map getMetadata()

Description copied from interface: GrailsApplication

Get access to the project's metadata, specified in application.properties

This provides access to information like required grails version, application name, version etc but NOT general application settings.

Specified by:

getMetadata in interface GrailsApplication

Returns:

A read-only Map of data about the application, not environment specific

getArtefactByLogicalPropertyName

public GrailsClass getArtefactByLogicalPropertyName(String type,
                                                    String logicalName)

Description copied from interface: GrailsApplication

Retrieves an artefact by its logical property name. For example the logical property name of BookController would be book

Specified by:

getArtefactByLogicalPropertyName in interface GrailsApplication

Parameters:

type - The artefact type

logicalName - The logical name

Returns:

The GrailsClass or null if it doesn't exist

addArtefact

public void addArtefact(Class artefact)

Description copied from interface: GrailsApplication

Adds the given artefact, attempting to determine type from

Specified by:

addArtefact in interface GrailsApplication

Parameters:

artefact - The artefact to add

isWarDeployed

public boolean isWarDeployed()

Description copied from interface: GrailsApplication

Returns true if this application has been deployed as a WAR file

Specified by:

isWarDeployed in interface GrailsApplication

Returns:

True if the application is WAR deployed

setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

Specified by:

setBeanClassLoader in interface BeanClassLoaderAware