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## grails.spring
Class BeanBuilder

    java.lang.Object
      groovy.lang.GroovyObjectSupport
          grails.spring.BeanBuilder

All Implemented Interfaces:
  groovy.lang.GroovyObject

Direct Known Subclasses:
  WebBeanBuilder

    public class BeanBuilder

extends groovy.lang.GroovyObjectSupport

Runtime bean configuration wrapper. 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

     BeanBuilder builder = new BeanBuilder()
     builder.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 refs
      }
      myService(MyService) {
          nestedBean = { AnotherBean bean->          // <-- setProperty with closure for nested bean
                    dataSource = dataSource
          }
      }
     }

You can also use the Spring IO API to load resources containing beans defined as a Groovy script using either the constructors or the loadBeans(Resource[] resources) method

Since:
  0.4
Author:
  Graeme Rocher

Constructor Summary
`BeanBuilder()`
`BeanBuilder(ApplicationContext parent)`
`BeanBuilder(ApplicationContext parent, ClassLoader classLoader)`
`BeanBuilder(ApplicationContext parentCtx, RuntimeSpringConfiguration springConfig, ClassLoader classLoader)`
`BeanBuilder(ClassLoader classLoader)`

Method Summary
`protected boolean` | `addToDeferred(BeanConfiguration beanConfig, String property, Object newValue)`
`BeanBuilder` | `beans(groovy.lang.Closure c)` Defines a set of beans for the given block or closure.
`ApplicationContext` | `createApplicationContext()` Creates an ApplicationContext from the current state of the BeanBuilder
`protected DynamicElementReader` | `createDynamicElementReader(String namespace, boolean decorator)`
`protected RuntimeSpringConfiguration` | `createRuntimeSpringConfiguration(ApplicationContext parent, ClassLoader classLoader)`
`protected void` | `filterGStringReferences(Object[] constructorArgs)`
`protected void` | `finalizeDeferredProperties()`
`BeanDefinition` | `getBeanDefinition(String name)` Retrieves a BeanDefinition for the given name
`Map<String,BeanDefinition>` | `getBeanDefinitions()` Retrieves all BeanDefinitions for this BeanBuilder
`org.apache.commons.logging.Log` | `getLog()`
`ApplicationContext` | `getParentCtx()` Retrieves the parent ApplicationContext
`Object` | `getProperty(String name)` This method overrides property retrieval in the scope of the BeanBuilder to either: a) Retrieve a variable from the bean builder's binding if it exists b) Retrieve a RuntimeBeanReference for a specific bean if it exists c) Otherwise just delegate to super.getProperty which will resolve properties from the BeanBuilder itself
`RuntimeSpringConfiguration` | `getSpringConfig()` Retrieves the RuntimeSpringConfiguration instance used the the BeanBuilder
`void` | `importBeans(String resourcePattern)` Imports Spring bean definitions from either XML or Groovy sources into the current bean builder instance
`protected void` | `initializeBeanBuilderForClassLoader(ClassLoader classLoader)`
`protected void` | `initializeSpringConfig()`
`protected BeanBuilder` | `invokeBeanDefiningClosure(groovy.lang.Closure callable)` When an methods argument is only a closure it is a set of bean definitions
`protected BeanConfiguration` | `invokeBeanDefiningMethod(String name, Object[] args)` This method is called when a bean definition node is called
`Object` | `invokeMethod(String name, Object arg)` This method overrides method invocation to create beans for each method name that takes a class argument
`void` | `loadBeans(Resource resource)` Loads a single Resource into the bean builder
`void` | `loadBeans(Resource[] resources)` Loads a set of given beans
`void` | `loadBeans(String resourcePattern)` Takes a resource pattern as (@see org.springframework.core.io.support.PathMatchingResourcePatternResolver) This allows you load multiple bean resources in this single builder eg loadBeans("classpath:*Beans.groovy")
`protected Object` | `manageListIfNecessary(Object value)` Checks whether there are any runtime refs inside the list and converts it to a ManagedList if necessary
`protected Object` | `manageMapIfNecessary(Object value)` Checks whether there are any runtime refs inside a Map and converts it to a ManagedMap if necessary
`void` | `registerBeans(BeanDefinitionRegistry registry)` Register a set of beans with the given bean registry.
`void` | `registerBeans(RuntimeSpringConfiguration targetSpringConfig)` Registers bean definitions with another instance of RuntimeSpringConfiguration, overriding any beans in the target.
`protected List` | `resolveConstructorArguments(Object[] args, int start, int end)`
`void` | `setBinding(groovy.lang.Binding b)` Sets the binding (the variables available in the scope of the BeanBuilder)
`void` | `setClassLoader(ClassLoader classLoader)`
`void` | `setNamespaceHandlerResolver(NamespaceHandlerResolver namespaceHandlerResolver)`
`void` | `setProperty(String name, Object value)` This method overrides property setting in the scope of the BeanBuilder to set properties on the current BeanConfiguration
`protected void` | `setPropertyOnBeanConfig(String name, Object value)`
`void` | `setResourcePatternResolver(ResourcePatternResolver resourcePatternResolver)`
`void` | `setSpringConfig(RuntimeSpringConfiguration springConfig)` Sets the runtime Spring configuration instance to use.
`protected Object[]` | `subarray(Object[] args, int i, int j)`
`void` | `xmlns(Map<String,String> definition)` Defines an Spring namespace definition to use

Methods inherited from class groovy.lang.GroovyObjectSupport
`getMetaClass, setMetaClass`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### BeanBuilder

    public BeanBuilder()

### BeanBuilder

    public BeanBuilder(ClassLoader classLoader)

### BeanBuilder

    public BeanBuilder(ApplicationContext parent)

### BeanBuilder

    public BeanBuilder(ApplicationContext parent,
                       ClassLoader classLoader)

### BeanBuilder

    public BeanBuilder(ApplicationContext parentCtx,
                       RuntimeSpringConfiguration springConfig,
                       ClassLoader classLoader)

Method Detail

### setResourcePatternResolver

    public void setResourcePatternResolver(ResourcePatternResolver resourcePatternResolver)

### initializeSpringConfig

    protected void initializeSpringConfig()

### setClassLoader

    public void setClassLoader(ClassLoader classLoader)

### initializeBeanBuilderForClassLoader

    protected void initializeBeanBuilderForClassLoader(ClassLoader classLoader)

### setNamespaceHandlerResolver

    public void setNamespaceHandlerResolver(NamespaceHandlerResolver namespaceHandlerResolver)

### createRuntimeSpringConfiguration

    protected RuntimeSpringConfiguration createRuntimeSpringConfiguration(ApplicationContext parent,
                                                                          ClassLoader classLoader)

### getLog

    public org.apache.commons.logging.Log getLog()

### importBeans

    public void importBeans(String resourcePattern)

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

  Parameters:
    `resourcePattern` - The resource pattern

### xmlns

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

  Defines an Spring namespace definition to use

  Parameters:
    `definition` - The definition

### getParentCtx

    public ApplicationContext getParentCtx()

  Retrieves the parent ApplicationContext

  Returns:
    The parent ApplicationContext

### getSpringConfig

    public RuntimeSpringConfiguration getSpringConfig()

  Retrieves the RuntimeSpringConfiguration instance used the the BeanBuilder

  Returns:
    The RuntimeSpringConfiguration instance

### getBeanDefinition

    public BeanDefinition getBeanDefinition(String name)

  Retrieves a BeanDefinition for the given name

  Parameters:
    `name` - The bean definition
  Returns:
    The BeanDefinition instance

### getBeanDefinitions

    public Map<String,BeanDefinition> getBeanDefinitions()

  Retrieves all BeanDefinitions for this BeanBuilder

  Returns:
    A map of BeanDefinition instances with the bean id as the key

### setSpringConfig

    public void setSpringConfig(RuntimeSpringConfiguration springConfig)

  Sets the runtime Spring configuration instance to use. This is not necessary to set and is configured to default value if not, but is useful for integrating with other spring configuration mechanisms @see org.codehaus.groovy.grails.commons.spring.GrailsRuntimeConfigurator

  Parameters:
    `springConfig` - The spring config

### loadBeans

    public void loadBeans(String resourcePattern)
                   throws IOException

  Takes a resource pattern as (@see org.springframework.core.io.support.PathMatchingResourcePatternResolver) This allows you load multiple bean resources in this single builder eg loadBeans("classpath:*Beans.groovy")

  Parameters:
    `resourcePattern` - The resource pattern
  Throws:
    `IOException` - When the path cannot be matched

### loadBeans

    public void loadBeans(Resource resource)
                   throws IOException

  Loads a single Resource into the bean builder

  Parameters:
    `resource` - The resource to load
  Throws:
    `IOException` - When an error occurs

### loadBeans

    public void loadBeans(Resource[] resources)
                   throws IOException

  Loads a set of given beans

  Parameters:
    `resources` - The resources to load
  Throws:
    `IOException` - Thrown if there is an error reading one of the passes resources

### registerBeans

    public void registerBeans(BeanDefinitionRegistry registry)

  Register a set of beans with the given bean registry. Most application contexts are bean registries.

### registerBeans

    public void registerBeans(RuntimeSpringConfiguration targetSpringConfig)

  Registers bean definitions with another instance of RuntimeSpringConfiguration, overriding any beans in the target.

  Parameters:
    `targetSpringConfig` - The RuntimeSpringConfiguration object

### 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`
  Overrides:
    `invokeMethod` in class `groovy.lang.GroovyObjectSupport`

### beans

    public BeanBuilder beans(groovy.lang.Closure c)

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

  Parameters:
    `c` - The block or closure
  Returns:
    This BeanBuilder instance

### createApplicationContext

    public ApplicationContext createApplicationContext()

  Creates an ApplicationContext from the current state of the BeanBuilder

  Returns:
    The ApplicationContext instance

### finalizeDeferredProperties

    protected void finalizeDeferredProperties()

### addToDeferred

    protected boolean addToDeferred(BeanConfiguration beanConfig,
                                    String property,
                                    Object newValue)

### invokeBeanDefiningMethod

    protected BeanConfiguration invokeBeanDefiningMethod(String name,
                                                         Object[] args)

  This method is called when a bean definition node is called

  Parameters:
    `name` - The name of the bean to define
    `args` - The arguments to the bean. The first argument is the class name, the last argument is sometimes a closure. All the arguments in between are constructor arguments
  Returns:
    The bean configuration instance

### resolveConstructorArguments

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

### subarray

    protected Object[] subarray(Object[] args,
                                int i,
                                int j)

### filterGStringReferences

    protected void filterGStringReferences(Object[] constructorArgs)

### invokeBeanDefiningClosure

    protected BeanBuilder invokeBeanDefiningClosure(groovy.lang.Closure callable)

  When an methods argument is only a closure it is a set of bean definitions

  Parameters:
    `callable` - The closure argument
  Returns:
    This BeanBuilder instance

### setProperty

    public void setProperty(String name,
                            Object value)

  This method overrides property setting in the scope of the BeanBuilder to set properties on the current BeanConfiguration

  Specified by:
    `setProperty` in interface `groovy.lang.GroovyObject`
  Overrides:
    `setProperty` in class `groovy.lang.GroovyObjectSupport`

### setPropertyOnBeanConfig

    protected void setPropertyOnBeanConfig(String name,
                                           Object value)

### manageMapIfNecessary

    protected Object manageMapIfNecessary(Object value)

  Checks whether there are any runtime refs inside a Map and converts it to a ManagedMap if necessary

  Parameters:
    `value` - The current map
  Returns:
    A ManagedMap or a normal map

### manageListIfNecessary

    protected Object manageListIfNecessary(Object value)

  Checks whether there are any runtime refs inside the list and converts it to a ManagedList if necessary

  Parameters:
    `value` - The object that represents the list
  Returns:
    Either a new list or a managed one

### getProperty

    public Object getProperty(String name)

  This method overrides property retrieval in the scope of the BeanBuilder to either: a) Retrieve a variable from the bean builder's binding if it exists b) Retrieve a RuntimeBeanReference for a specific bean if it exists c) Otherwise just delegate to super.getProperty which will resolve properties from the BeanBuilder itself

  Specified by:
    `getProperty` in interface `groovy.lang.GroovyObject`
  Overrides:
    `getProperty` in class `groovy.lang.GroovyObjectSupport`

### createDynamicElementReader

    protected DynamicElementReader createDynamicElementReader(String namespace,
                                                              boolean decorator)

### setBinding

    public void setBinding(groovy.lang.Binding b)

  Sets the binding (the variables available in the scope of the BeanBuilder)

  Parameters:
    `b` - The Binding instance

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