gr.uoa.di.madgik.searchlibrary.operatorlibrary.indexfuse
Class IndexFuseOp

java.lang.Object
  gr.uoa.di.madgik.searchlibrary.operatorlibrary.indexfuse.IndexFuseOp

public class IndexFuseOp
extends Object

Operator class used to perform a fuse operation on its input org.gcube.searchservice.searchlibrary.resultset.ResultSet, that represent results produced from full text index lookup operations on a set of collections, and produces an output org.gcube.searchservice.searchlibrary.resultset.ResultSet holding the joined results. For each collection the input comes from metadata and content collections that correspond to that collection. The output contains 0 or 1 result for each OID of the input collections.

Author:

UoA

Field Summary

static String	CollectionFieldNameDef The default name of the Field the collection will be stored to
static String	ObjectIdFieldNameDef The default name of the Field the object id will be stored to
static String	RankFieldNameDef The default name of the Field the rank will be stored to

Constructor Summary

IndexFuseOp(URI[] contentLocators, URI[][] metaLocators, String[] colIDs, StatsContainer stats)
Creates a new IndexFuseOp with the default field names and the default timeout

IndexFuseOp(URI[] contentLocators, URI[][] metaLocators, String[] colIDs, String objectIdFieldName, String collectionFieldName, String rankFieldName, long timeout, TimeUnit timeUnit, StatsContainer stats)
Creates a new IndexFuseOp with configurable field names and timeout

IndexFuseOp(URI[] contentLocators, URI[][] metaLocators, String[] colIDs, String objectIdFieldName, String collectionFieldName, String rankFieldName, StatsContainer stats)
Creates a new IndexFuseOp with configurable field names and the default timeout

Method Summary

URI	compute() Performs the fuse operation

Methods inherited from class java.lang.Object

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

Field Detail

ObjectIdFieldNameDef

public static String ObjectIdFieldNameDef

The default name of the Field the object id will be stored to

CollectionFieldNameDef

public static String CollectionFieldNameDef

The default name of the Field the collection will be stored to

RankFieldNameDef

public static String RankFieldNameDef

The default name of the Field the rank will be stored to

Constructor Detail

IndexFuseOp

public IndexFuseOp(URI[] contentLocators,
                   URI[][] metaLocators,
                   String[] colIDs,
                   StatsContainer stats)
            throws Exception

Creates a new IndexFuseOp with the default field names and the default timeout

Parameters:

contentLocators - The content collection inputs org.gcube.searchservice.searchlibrary.resultset.ResultSet

metaLocators - The metadata collection inputs org.gcube.searchservice.searchlibrary.resultset.ResultSet

colIDs -

stats - statistics

Throws:

Exception

IndexFuseOp

public IndexFuseOp(URI[] contentLocators,
                   URI[][] metaLocators,
                   String[] colIDs,
                   String objectIdFieldName,
                   String collectionFieldName,
                   String rankFieldName,
                   StatsContainer stats)
            throws Exception

Creates a new IndexFuseOp with configurable field names and the default timeout

Parameters:

contentLocators - The content collection inputs org.gcube.searchservice.searchlibrary.resultset.ResultSet

metaLocators - The metadata collection inputs org.gcube.searchservice.searchlibrary.resultset.ResultSet

colIDs -

objectIdFieldName - The name of the Field the object id will be stored to

collectionFieldName - The name of the Field the collection will be stored to

rankFieldName - The name of the Field the rank will be stored to

stats - statistics

Throws:

Exception

IndexFuseOp

public IndexFuseOp(URI[] contentLocators,
                   URI[][] metaLocators,
                   String[] colIDs,
                   String objectIdFieldName,
                   String collectionFieldName,
                   String rankFieldName,
                   long timeout,
                   TimeUnit timeUnit,
                   StatsContainer stats)
            throws Exception

Creates a new IndexFuseOp with configurable field names and timeout

Parameters:

contentLocators - The content collection inputs org.gcube.searchservice.searchlibrary.resultset.ResultSet

metaLocators - The metadata collection inputs org.gcube.searchservice.searchlibrary.resultset.ResultSet

colIDs -

objectIdFieldName - The name of the Field the object id will be stored to

collectionFieldName - The name of the Field the collection will be stored to

rankFieldName - The name of the Field the rank will be stored to

timeout - The timeout that will be used by all IRecordReaders and the IRecordWriter

timeUnit - The time unit of the timeout

stats - statistics

Throws:

Exception

Method Detail

compute

public URI compute()
            throws Exception

Performs the fuse operation

Returns:

The locator of the results

Throws:

Exception - An unrecoverable for the operation error occured