org.apache.solr.search.grouping.distributed.shardresultserializer
Class TopGroupsResultTransformer

java.lang.Object
  org.apache.solr.search.grouping.distributed.shardresultserializer.TopGroupsResultTransformer

All Implemented Interfaces:

ShardResultTransformer<List<Command>,Map<String,?>>

public class TopGroupsResultTransformer
extends Object
implements ShardResultTransformer<List<Command>,Map<String,?>>

Implementation for transforming TopGroups and TopDocs into a NamedList structure and visa versa.

Constructor Summary

TopGroupsResultTransformer(ResponseBuilder rb)

Method Summary

protected NamedList	serializeTopDocs(QueryCommandResult result)
protected NamedList	serializeTopGroups(TopGroups<BytesRef> data, SchemaField groupField)
NamedList	transform(List<Command> data) Transforms data to a NamedList structure for serialization purposes.
Map<String,?>	transformToNative(NamedList<NamedList> shardResponse, Sort groupSort, Sort sortWithinGroup, String shard) Transforms the specified shard response into native structures.

Methods inherited from class java.lang.Object

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

Constructor Detail

TopGroupsResultTransformer

public TopGroupsResultTransformer(ResponseBuilder rb)

Method Detail

transform

public NamedList transform(List<Command> data)
                    throws IOException

Transforms data to a NamedList structure for serialization purposes.

Specified by:

transform in interface ShardResultTransformer<List<Command>,Map<String,?>>

Parameters:

data - The data to be transformed

Returns:

NamedList structure

Throws:

IOException - If I/O related errors occur during transforming

transformToNative

public Map<String,?> transformToNative(NamedList<NamedList> shardResponse,
                                       Sort groupSort,
                                       Sort sortWithinGroup,
                                       String shard)

Transforms the specified shard response into native structures.

Specified by:

transformToNative in interface ShardResultTransformer<List<Command>,Map<String,?>>

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

serializeTopGroups

protected NamedList serializeTopGroups(TopGroups<BytesRef> data,
                                       SchemaField groupField)
                                throws IOException

Throws:

IOException

serializeTopDocs

protected NamedList serializeTopDocs(QueryCommandResult result)
                              throws IOException

Throws:

IOException