org.apache.commons.betwixt.strategy

Class DefaultIdStoringStrategy

java.lang.Object

org.apache.commons.betwixt.strategy.IdStoringStrategy

org.apache.commons.betwixt.strategy.DefaultIdStoringStrategy

public class DefaultIdStoringStrategy
extends IdStoringStrategy

Stores every ID that given to it into an internal HashMap and returns it on request.

DefaultIdStoringStrategy(Map, Map) allows the implementations to be specified. For example, those who want to use identity (rather than equality) should pass a IdentityHashMap instance.

Since:

0.7

Author:

Christian Aust

Field Summary

Fields inherited from class org.apache.commons.betwixt.strategy.IdStoringStrategy

DEFAULT

Constructor Summary

Constructors

Constructor and Description
DefaultIdStoringStrategy() Constructs a IdStoringStrategy using a HashMap for storage.
DefaultIdStoringStrategy(Map idByBeanMap, Map beanByIdMap) Constructs a IdStoringStrategyusing the Map implementations provided for storage.

Method Summary

Methods

Modifier and Type	Method and Description
Object	getReferenced(Context context, String id) Gets an object matching the given reference.
String	getReferenceFor(Context context, Object bean) Returns a String id for the given bean if it has been stored previously.
void	reset() Clears all beans.
void	setReference(Context context, Object bean, String id) Stores an ID for the given instance and context.

Methods inherited from class org.apache.commons.betwixt.strategy.IdStoringStrategy

createDefault

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultIdStoringStrategy

public DefaultIdStoringStrategy()

Constructs a IdStoringStrategy using a HashMap for storage.

DefaultIdStoringStrategy

public DefaultIdStoringStrategy(Map idByBeanMap,
                        Map beanByIdMap)

Constructs a IdStoringStrategyusing the Map implementations provided for storage.

Parameters:

idByBeanMap - Map implementation stores the ID's by bean

beanByIdMap - Map implementation stores the bean's by ID

Since:

0.8

Method Detail

getReferenceFor

public String getReferenceFor(Context context,
                     Object bean)

Returns a String id for the given bean if it has been stored previously. Otherwise returns null.

Specified by:

getReferenceFor in class IdStoringStrategy

Parameters:

context - current context, not null

bean - the instance, not null

Returns:

id as String, or null if not found

See Also:

IdStoringStrategy.getReferenceFor(org.apache.commons.betwixt.expression.Context, java.lang.Object)

setReference

public void setReference(Context context,
                Object bean,
                String id)

Stores an ID for the given instance and context. It will check first if this ID has been previously stored and will do nothing in that case.

Specified by:

setReference in class IdStoringStrategy

Parameters:

context - current context, not null

bean - current instance, not null

id - the ID to store

See Also:

IdStoringStrategy.setReference(org.apache.commons.betwixt.expression.Context, java.lang.Object, java.lang.String)

getReferenced

public Object getReferenced(Context context,
                   String id)

Gets an object matching the given reference.

Specified by:

getReferenced in class IdStoringStrategy

Parameters:

context - Context, not null

id - the reference id

Returns:

an bean matching the given reference, or null if there is no bean matching the given reference

reset

public void reset()

Clears all beans.

Specified by:

reset in class IdStoringStrategy