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com.ibm.portal.wcm.plr
Interface AttributeValueOnRequestProcessorFactory

public interface AttributeValueOnRequestProcessorFactory

This interface can be implemented to realize a factory the creates AttributeValueProcessor objects that depend on information from the BeanListRequest. The newProcessor(BeanListRequest) method is called once per BeanList processing.

Implementations of AttributeValueOnRequestProcessorFactory need to globally register using a plugin.xml. Here is an example fragment of a plugin.xml that registers a custom AttributeValueOnRequestProcessorFactory implementation. 

<plugin id="com.acme.plr">
    <extension 
         point="com.ibm.portal.wcm.plr.AttributeValueProcessor"
         id="MyAttributeValueOnRequestProcessorFactory">    
       <factory class="com.acme.MyAttributeValueOnRequestProcessorFactoryImpl"/>
    </extension>
 </plugin>
After registration of the factory you need to enable the attribute processing for a certain attribute in the list rendering profile. To enable attribute processing for a certain attribute set the meta data key "processors". The value of the meta data key must be the unique identifier of the extension. If available, this identifier is unique within the plug-in registry, and is composed of the namespace where this extension was declared and this extension's simple identifier.
This is an example of a fragment of attribute definition in a list rendering profile that enables the factory from the sample above for the attribute with the name "body" 
 myprofile.ItemAttribute.body.processors=com.acme.plr.MyAttributeValueOnRequestProcessorFactory

Implementations must be thread-safe as the same instance might be used by multiple threads concurrently.

Since:
8.5.0.0 CF03
Note:
This interface is designed to be implemented by clients.

Method Summary
 AttributeValueProcessor newProcessor(BeanListRequest request)
          Create a new a instance of a AttributeValueProcessor.
 

Method Detail

newProcessor

AttributeValueProcessor newProcessor(BeanListRequest request)
                                     throws AttributeValueProcessorInstantiationException
Create a new a instance of a AttributeValueProcessor. This method is called once per BeanList processing.

As processing results from the returned processor instance might depend on information from the BeanListRequest that was used the retrieve the ResourceBean from a BeanListResponse processing result are not cached in the scope of the BeanListResponse.

Parameters:
request - The request that was used to build the BeanListResponse that provides the ResourceBean
Returns:
A valid non-null instance of a AttributeValueProcessor
Throws:
AttributeValueProcessorInstantiationException - If a AttributeValueProcessor could not be instantiated
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