org.springframework.beans.factory.groovy

Class GroovyBeanDefinitionReader

java.lang.Object

org.springframework.beans.factory.support.AbstractBeanDefinitionReader

org.springframework.beans.factory.groovy.GroovyBeanDefinitionReader

All Implemented Interfaces:

groovy.lang.GroovyObject, BeanDefinitionReader, EnvironmentCapable

public class GroovyBeanDefinitionReader
extends AbstractBeanDefinitionReader
implements groovy.lang.GroovyObject

A Groovy-based reader for Spring bean definitions: like a Groovy builder, but more of a DSL for Spring configuration. Allows syntax like:

 import org.hibernate.SessionFactory
 import org.apache.commons.dbcp.BasicDataSource

 def reader = new GroovyBeanDefinitionReader(myApplicationContext)
 reader.beans {
     dataSource(BasicDataSource) {                  // <--- invokeMethod
         driverClassName = "org.hsqldb.jdbcDriver"
         url = "jdbc:hsqldb:mem:grailsDB"
         username = "sa"                            // <-- setProperty
         password = ""
         settings = [mynew:"setting"]
     }
     sessionFactory(SessionFactory) {
         dataSource = dataSource                    // <-- getProperty for retrieving references
     }
     myService(MyService) {
         nestedBean = { AnotherBean bean ->         // <-- setProperty with closure for nested bean
             dataSource = dataSource
         }
     }
 }

You can also load resources containing beans defined in a Groovy script using either the AbstractBeanDefinitionReader.loadBeanDefinitions(org.springframework.core.io.Resource...) or AbstractBeanDefinitionReader.loadBeanDefinitions(String...) method, with a script looking as follows:

 import org.hibernate.SessionFactory
 import org.apache.commons.dbcp.BasicDataSource

 beans {
     dataSource(BasicDataSource) {
         driverClassName = "org.hsqldb.jdbcDriver"
         url = "jdbc:hsqldb:mem:grailsDB"
         username = "sa"
         password = ""
         settings = [mynew:"setting"]
     }
     sessionFactory(SessionFactory) {
         dataSource = dataSource
     }
     myService(MyService) {
         nestedBean = { AnotherBean bean ->
             dataSource = dataSource
         }
     }
 }

This bean definition reader also understands XML bean definition files, allowing for seamless mixing and matching with Groovy bean definition files.

Typically applied to a DefaultListableBeanFactory or a GenericApplicationContext, but can be used against any BeanDefinitionRegistry implementation.

Since:

4.0

Author:

Jeff Brown, Graeme Rocher, Juergen Hoeller

See Also:

BeanDefinitionRegistry, DefaultListableBeanFactory, GenericApplicationContext, GenericGroovyApplicationContext

Field Summary

Fields inherited from class org.springframework.beans.factory.support.AbstractBeanDefinitionReader

logger

Constructor Summary

Constructors

Constructor and Description
GroovyBeanDefinitionReader(BeanDefinitionRegistry registry) Create new GroovyBeanDefinitionReader for the given bean factory.
GroovyBeanDefinitionReader(XmlBeanDefinitionReader xmlBeanDefinitionReader) Create new GroovyBeanDefinitionReader based on the given XmlBeanDefinitionReader, using the same registry and delegating XML loading to it.

Method Summary

Modifier and Type	Method and Description
protected void	applyPropertyToBeanDefinition(String name, Object value)
GenericBeanDefinition	bean(Class<?> type) Defines an inner bean definition.
AbstractBeanDefinition	bean(Class<?> type, Object... args) Define an inner bean definition.
GroovyBeanDefinitionReader	beans(groovy.lang.Closure closure) Defines a set of beans for the given block or closure.
groovy.lang.Binding	getBinding() Return a specified binding for Groovy variables, if any.
groovy.lang.MetaClass	getMetaClass()
Object	getProperty(String name) This method overrides property retrieval in the scope of the GroovyBeanDefinitionReader to either: Retrieve a variable from the bean builder's binding if it exists Retrieve a RuntimeBeanReference for a specific bean if it exists Otherwise just delegate to MetaClass.getProperty which will resolve properties from the GroovyBeanDefinitionReader itself
void	importBeans(String resourcePattern) Import Spring bean definitions from either XML or Groovy sources into the current bean builder instance.
protected GroovyBeanDefinitionReader	invokeBeanDefiningClosure(groovy.lang.Closure callable) When a method argument is only a closure it is a set of bean definitions.
Object	invokeMethod(String name, Object arg) This method overrides method invocation to create beans for each method name that takes a class argument.
int	loadBeanDefinitions(EncodedResource encodedResource) Load bean definitions from the specified Groovy script or XML file.
int	loadBeanDefinitions(Resource resource) Load bean definitions from the specified Groovy script or XML file.
protected List<Object>	resolveConstructorArguments(Object[] args, int start, int end)
void	setBinding(groovy.lang.Binding binding) Set the binding, i.e.
void	setMetaClass(groovy.lang.MetaClass metaClass)
void	setProperty(String name, Object value) This method overrides property setting in the scope of the GroovyBeanDefinitionReader to set properties on the current bean definition.
void	xmlns(Map<String,String> definition) Define a Spring namespace definition to use.

Methods inherited from class org.springframework.beans.factory.support.AbstractBeanDefinitionReader

getBeanClassLoader, getBeanFactory, getBeanNameGenerator, getEnvironment, getRegistry, getResourceLoader, loadBeanDefinitions, loadBeanDefinitions, loadBeanDefinitions, loadBeanDefinitions, setBeanClassLoader, setBeanNameGenerator, setEnvironment, setResourceLoader

Methods inherited from class java.lang.Object

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

Constructor Detail

GroovyBeanDefinitionReader

public GroovyBeanDefinitionReader(BeanDefinitionRegistry registry)

Create new GroovyBeanDefinitionReader for the given bean factory.

Parameters:

registry - the BeanFactory to load bean definitions into, in the form of a BeanDefinitionRegistry

GroovyBeanDefinitionReader

public GroovyBeanDefinitionReader(XmlBeanDefinitionReader xmlBeanDefinitionReader)

Create new GroovyBeanDefinitionReader based on the given XmlBeanDefinitionReader, using the same registry and delegating XML loading to it.

Parameters:

xmlBeanDefinitionReader - the XmlBeanDefinitionReader to derive the registry from and to delegate XML loading to

Method Detail

setMetaClass

public void setMetaClass(groovy.lang.MetaClass metaClass)

Specified by:

setMetaClass in interface groovy.lang.GroovyObject

getMetaClass

public groovy.lang.MetaClass getMetaClass()

Specified by:

getMetaClass in interface groovy.lang.GroovyObject

setBinding

public void setBinding(groovy.lang.Binding binding)

Set the binding, i.e. the Groovy variables available in the scope of a GroovyBeanDefinitionReader closure.

getBinding

public groovy.lang.Binding getBinding()

Return a specified binding for Groovy variables, if any.

loadBeanDefinitions

public int loadBeanDefinitions(Resource resource)
                        throws BeanDefinitionStoreException

Load bean definitions from the specified Groovy script or XML file.

Note that ".xml" files will be parsed as XML content; all other kinds of resources will be parsed as Groovy scripts.

Specified by:

loadBeanDefinitions in interface BeanDefinitionReader

Parameters:

resource - the resource descriptor for the Groovy script

Returns:

the number of bean definitions found

Throws:

BeanDefinitionStoreException - in case of loading or parsing errors

loadBeanDefinitions

public int loadBeanDefinitions(EncodedResource encodedResource)
                        throws BeanDefinitionStoreException

Load bean definitions from the specified Groovy script or XML file.

Note that ".xml" files will be parsed as XML content; all other kinds of resources will be parsed as Groovy scripts.

Parameters:

encodedResource - the resource descriptor for the Groovy script, allowing to specify an encoding to use for parsing the file

Returns:

the number of bean definitions found

Throws:

BeanDefinitionStoreException - in case of loading or parsing errors

beans

public GroovyBeanDefinitionReader beans(groovy.lang.Closure closure)

Defines a set of beans for the given block or closure.

Parameters:

closure - the block or closure

Returns:

this GroovyBeanDefinitionReader instance

bean

public GenericBeanDefinition bean(Class<?> type)

Defines an inner bean definition.

Parameters:

type - the bean type

Returns:

the bean definition

bean

public AbstractBeanDefinition bean(Class<?> type,
                                   Object... args)

Define an inner bean definition.

Parameters:

type - the bean type

args - the constructors arguments and closure configurer

Returns:

the bean definition

xmlns

public void xmlns(Map<String,String> definition)

Define a Spring namespace definition to use.

Parameters:

definition - the namespace definition

importBeans

public void importBeans(String resourcePattern)
                 throws IOException

Import Spring bean definitions from either XML or Groovy sources into the current bean builder instance.

Parameters:

resourcePattern - the resource pattern

Throws:

IOException

invokeMethod

public Object invokeMethod(String name,
                           Object arg)

This method overrides method invocation to create beans for each method name that takes a class argument.

Specified by:

invokeMethod in interface groovy.lang.GroovyObject

invokeBeanDefiningClosure

protected GroovyBeanDefinitionReader invokeBeanDefiningClosure(groovy.lang.Closure callable)

When a method argument is only a closure it is a set of bean definitions.

Parameters:

callable - the closure argument

Returns:

this GroovyBeanDefinitionReader instance

resolveConstructorArguments

protected List<Object> resolveConstructorArguments(Object[] args,
                                                   int start,
                                                   int end)

setProperty

public void setProperty(String name,
                        Object value)

This method overrides property setting in the scope of the GroovyBeanDefinitionReader to set properties on the current bean definition.

Specified by:

setProperty in interface groovy.lang.GroovyObject

applyPropertyToBeanDefinition

protected void applyPropertyToBeanDefinition(String name,
                                             Object value)

getProperty

public Object getProperty(String name)

This method overrides property retrieval in the scope of the GroovyBeanDefinitionReader to either:

• Retrieve a variable from the bean builder's binding if it exists
• Retrieve a RuntimeBeanReference for a specific bean if it exists
• Otherwise just delegate to MetaClass.getProperty which will resolve properties from the GroovyBeanDefinitionReader itself

Specified by:

getProperty in interface groovy.lang.GroovyObject