org.oddjob.arooa.registry

Class LinkedBeanRegistry

java.lang.Object

org.oddjob.arooa.registry.SimpleBeanRegistry

org.oddjob.arooa.registry.LinkedBeanRegistry

All Implemented Interfaces:

BeanDirectory, BeanRegistry

public class LinkedBeanRegistry
extends SimpleBeanRegistry

A BeanRegistry that will attempt to find a bean value in an existing BeanDirectory if it hasn't been registered with this registry.

Author:

rob

Field Summary

Fields inherited from class org.oddjob.arooa.registry.SimpleBeanRegistry

RESERVED_CHARACTERS

Constructor Summary

Constructors

Constructor and Description
LinkedBeanRegistry(ArooaSession existingSession) A constructor that takes takes the existing directory and tools from the given session.
LinkedBeanRegistry(BeanDirectory existingDirectory, PropertyAccessor propertyAccessor, ArooaConverter converter) Constructor.

Method Summary

Modifier and Type	Method and Description
<T> java.lang.Iterable<T>	getAllByType(java.lang.Class<T> type) Get all objects in the directory of the required type.
java.lang.String	getIdFor(java.lang.Object bean) Find the id for the given component.
java.lang.Object	lookup(java.lang.String path) First try our local registry then the parent.
<T> T	lookup(java.lang.String path, java.lang.Class<T> required) Get a value, as above, but also convert it into to given type.

Methods inherited from class org.oddjob.arooa.registry.SimpleBeanRegistry

getAllIds, register, remove, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LinkedBeanRegistry

public LinkedBeanRegistry(BeanDirectory existingDirectory,
                          PropertyAccessor propertyAccessor,
                          ArooaConverter converter)

Constructor.

Parameters:

existingDirectory -

propertyAccessor -

converter -

LinkedBeanRegistry

public LinkedBeanRegistry(ArooaSession existingSession)

A constructor that takes takes the existing directory and tools from the given session.

Parameters:

existingSession -

Method Detail

lookup

public java.lang.Object lookup(java.lang.String path)

First try our local registry then the parent.

Specified by:

lookup in interface BeanDirectory

Overrides:

lookup in class SimpleBeanRegistry

Parameters:

path - The path.

Returns:

The resultant value or null.

lookup

public <T> T lookup(java.lang.String path,
                    java.lang.Class<T> required)
             throws ArooaConversionException

Description copied from interface: BeanDirectory

Get a value, as above, but also convert it into to given type.

Conversion in the directory is required when the client code has no access to the converters required, for instance in a nested Oddjob.

Specified by:

lookup in interface BeanDirectory

Overrides:

lookup in class SimpleBeanRegistry

Type Parameters:

T - The required type.

Parameters:

path - The full path

required - The required type.

Returns:

An object of the required type or null if none can be found.

Throws:

ArooaConversionException - If an object can be found but it can't be converted into the required type.

getIdFor

public java.lang.String getIdFor(java.lang.Object bean)

Description copied from class: SimpleBeanRegistry

Find the id for the given component.

Specified by:

getIdFor in interface BeanDirectory

Overrides:

getIdFor in class SimpleBeanRegistry

Parameters:

bean - The component.

Returns:

The id or null if none can be found.

getAllByType

public <T> java.lang.Iterable<T> getAllByType(java.lang.Class<T> type)

Description copied from interface: BeanDirectory

Get all objects in the directory of the required type.

Why an Iterable not a Collection or Set? It was thought that this would force read only use. Maybe it should be an array...

Specified by:

getAllByType in interface BeanDirectory

Overrides:

getAllByType in class SimpleBeanRegistry

Type Parameters:

T - The required type.

Parameters:

type - The type.

Returns:

An Iterable for matches. Never null.