org.settings4j.objectresolver

Class UnionObjectResolver

java.lang.Object

org.settings4j.objectresolver.UnionObjectResolver

All Implemented Interfaces:

ObjectResolver

public class UnionObjectResolver
extends Object
implements ObjectResolver

The UnionObjectResolver can be an container for many other ObjectResolver which will be processed in sequence.

the first result of a ObjectResolver which are a not-null value will be used as result.

Author:

Harald.Brabenetz

Constructor Summary

Constructors

Constructor and Description
UnionObjectResolver()

Method Summary

Methods

Modifier and Type	Method and Description
void	addObjectResolver(ObjectResolver objectResolver) Some Implementations of a ObjectResolver are delegating the functionality to other ObjectResolvers.
Object	getObject(String key, ContentResolver contentResolver) Reads the byte[] content from the ContentResolver and creates an Object.

Methods inherited from class java.lang.Object

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

Constructor Detail

UnionObjectResolver

public UnionObjectResolver()

Method Detail

addObjectResolver

public void addObjectResolver(ObjectResolver objectResolver)

Some Implementations of a ObjectResolver are delegating the functionality to other ObjectResolvers.
Examples are: UnionObjectResolver

 --------------------------------------
 <objectResolver name="DefaultObjectResolver" class="org.settings4j.objectresolver.UnionObjectResolver">
     <objectResolver-ref ref="JavaXMLBeansObjectResolver" />
     <objectResolver-ref ref="SpringConfigObjectResolver" />
 </objectResolver>
 --------------------------------------
 

Specified by:

addObjectResolver in interface ObjectResolver

Parameters:

objectResolver - the original objectResolver to delegate.

getObject

public Object getObject(String key,
               ContentResolver contentResolver)

Reads the byte[] content from the ContentResolver and creates an Object. The normal usecase of an implementation of this ObjectResolver Interface:

1. Read the Propertyfile from ContentResolver.getContent(key + ".properties")
2. Read the Value of "objectResolverKey" from propertyfile
3. The "objectResolverKey" defines which ObjectResolver-Implementation should solve the byte[] content to a Java-Object
4. Convert the byte[] from ContentResolver.getContent(String key) to an Object.
5. Maybe additional values are consumed from the propertyfile

Specified by:

getObject in interface ObjectResolver

Parameters:

key - The Key of the byte[] who should be converted to an Object.

contentResolver - The contentResolver, from where the content could be read.

Returns:

the Object, or null if this Object-Resolver can not convert the byte[] Content to an Object.