org.apache.solr.search.grouping.distributed.shardresultserializer
Interface ShardResultTransformer<T,R>

All Known Implementing Classes:

SearchGroupsResultTransformer, TopGroupsResultTransformer

public interface ShardResultTransformer<T,R>

A ShardResultTransformer is responsible for transforming a grouped shard result into group related structures (such as TopGroups and SearchGroup) and visa versa.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Method Summary

NamedList	transform(T data) Transforms data to a NamedList structure for serialization purposes.
R	transformToNative(NamedList<NamedList> shardResponse, Sort groupSort, Sort sortWithinGroup, String shard) Transforms the specified shard response into native structures.

Method Detail

transform

NamedList transform(T data)
                    throws IOException

Transforms data to a NamedList structure for serialization purposes.

Parameters:

data - The data to be transformed

Returns:

NamedList structure

Throws:

IOException - If I/O related errors occur during transforming

transformToNative

R transformToNative(NamedList<NamedList> shardResponse,
                    Sort groupSort,
                    Sort sortWithinGroup,
                    String shard)

Transforms the specified shard response into native structures.

Parameters:

shardResponse - The shard response containing data in a NamedList structure

groupSort - The group sort

sortWithinGroup - The sort inside a group

shard - The shard address where the response originated from

Returns:

native structure of the data