org.apache.solr.common

Interface MapWriter

All Superinterfaces:

MapSerializable

All Known Implementing Classes:

BiJoinStream, CalculatorStream, CartesianProductStream, CellStream, CloudSolrStream, CommitStream, ComplementStream, DaemonStream, EchoStream, EvalStream, ExceptionStream, ExecutorStream, FacetStream, FeaturesSelectionStream, FetchStream, GatherNodesStream, GetStream, HashJoinStream, HavingStream, InnerJoinStream, IntersectStream, JDBCStream, JoinStream, LeftOuterJoinStream, LetStream, ListStream, MergeStream, ModelStream, NullStream, OuterHashJoinStream, ParallelStream, PriorityStream, PushBackStream, RandomStream, RankStream, ReducerStream, RegressionEvaluator.RegressionTuple, RollupStream, ScoreNodesStream, SelectStream, ShortestPathStream, ShuffleStream, SignificantTermsStream, SolrStream, SortStream, StatsStream, TextLogitStream, TextLogitStream.TermsStream, TimeSeriesStream, TopicStream, Tuple, TupleStream, TupStream, UniqueStream, UpdateStream

public interface MapWriter
extends MapSerializable

Use this class to push all entries of a Map into an output. This avoids creating map instances and is supposed to be memory efficient. If the entries are primitives, unnecessary boxing is also avoided

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	MapWriter.EntryWriter An interface to push one entry at a time to the output

Method Summary

Modifier and Type	Method and Description
default Map	toMap(Map<String,Object> map) Use the passed map to minimize object creation.
void	writeMap(MapWriter.EntryWriter ew)

Method Detail

toMap

default Map toMap(Map<String,Object> map)

Description copied from interface: MapSerializable

Use the passed map to minimize object creation. Do not keep a reference to the passed map and reuse it. it may be reused by the framework

Specified by:

toMap in interface MapSerializable

writeMap

void writeMap(MapWriter.EntryWriter ew)
       throws IOException

Throws:

IOException