org.settings4j.contentresolver

Class UnionContentResolver

java.lang.Object

org.settings4j.contentresolver.UnionContentResolver

All Implemented Interfaces:

ContentResolver

public class UnionContentResolver
extends Object
implements ContentResolver

The UnionContentResolver can be an container for many other ContentResolver which will be processed in sequence.

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

Author:

Harald.Brabenetz

Constructor Summary

Constructors

Constructor and Description
UnionContentResolver() Default Constructor.
UnionContentResolver(ContentResolver contentResolver) Constructor with the first ContentResolver.

Method Summary

Methods

Modifier and Type	Method and Description
void	addContentResolver(ContentResolver contentResolver) Some Implementations of a ContentResolver are delegating the functionality to other ContentResolvers.
byte[]	getContent(String key) Reads the Content for the given Key or null if nothing where found.

Methods inherited from class java.lang.Object

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

Constructor Detail

UnionContentResolver

public UnionContentResolver()

Default Constructor.

UnionContentResolver

public UnionContentResolver(ContentResolver contentResolver)

Constructor with the first ContentResolver.

Parameters:

contentResolver - with the first ContentResolver.

Method Detail

addContentResolver

public void addContentResolver(ContentResolver contentResolver)

Some Implementations of a ContentResolver are delegating the functionality to other ContentResolvers.
Examples are: UnionContentResolver

 --------------------------------------
 <contentResolver name="DefaultContentResolver" class="org.settings4j.contentresolver.UnionContentResolver">
     <contentResolver-ref ref="FSContentResolver" />
     <contentResolver-ref ref="ClasspathContentResolver" />
 </contentResolver>
 --------------------------------------
 

Specified by:

addContentResolver in interface ContentResolver

Parameters:

contentResolver - the original contentResolver to delegate.

getContent

public byte[] getContent(String key)

Reads the Content for the given Key or null if nothing where found.

Specified by:

getContent in interface ContentResolver

Parameters:

key - The key

Returns:

The byte[] Content or null if nothing where found.