Package org.oddjob.arooa.registry

Class SimpleBeanDirectory

java.lang.Object

org.oddjob.arooa.registry.SimpleBeanDirectory

All Implemented Interfaces:

BeanDirectory

public class SimpleBeanDirectory
extends Object
implements BeanDirectory

Provide a BeanDirectory from some mapping functions. TODO: This is only used by ForEach in Oddjob. It should probably move there.

Author:

Rob Gordon.

Constructor Summary

Constructors

Constructor	Description
SimpleBeanDirectory(Function<? super String,?> ids, Function<? super Object,? extends String> toId, Supplier<Stream<?>> components, PropertyAccessor propertyAccessor, ArooaConverter converter)

Method Summary

Modifier and Type	Method	Description
<T> Iterable<T>	getAllByType(Class<T> type)	Get all objects in the directory of the required type.
String	getIdFor(Object component)	Find the id for the given component.
Object	lookup(String path)	Get the value which is either a bean or the property of a bean.
<T> T	lookup(String path, Class<T> required)	Get a value, as above, but also convert it into to given type.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.oddjob.arooa.registry.BeanDirectory

getAllIds

Constructor Details

SimpleBeanDirectory

public SimpleBeanDirectory(Function<? super String,?> ids,
 Function<? super Object,? extends String> toId,
 Supplier<Stream<?>> components,
 PropertyAccessor propertyAccessor,
 ArooaConverter converter)

Method Details

getAllByType

public <T> Iterable<T> getAllByType(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

Type Parameters:

T - The required type.

Parameters:

type - The type.

Returns:

An Iterable for matches. Never null.

lookup

public Object lookup(String path)
              throws ArooaPropertyException

Description copied from interface: BeanDirectory

Get the value which is either a bean or the property of a bean.

The path can be either:

• The id of a bean e.g. mybean
• A simple property of a bean e.g. mybean.simple
• An indexed property of a bean e.g. mybean.indexed[1]
• A mapped property of a bean e.g. mybean.mapped(key)
• A nested property of a bean e.g. mybean.complex.simple
• A nested beanownerid/mybean
• Most combinations of the above.

Specified by:

lookup in interface BeanDirectory

Parameters:

path - The path.

Returns:

The resultant value or null.

Throws:

ArooaPropertyException - If property access fails.

lookup

public <T> T lookup(String path,
 Class<T> required)
             throws ArooaPropertyException,
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

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:

ArooaPropertyException - If property access fails.

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

getIdFor

public String getIdFor(Object component)

Find the id for the given component.

Specified by:

getIdFor in interface BeanDirectory

Parameters:

component - The component.

Returns:

The id or null if none can be found.