com.bigdata.rdf.lexicon
Class Id2TermWriteProc

java.lang.Object
  com.bigdata.btree.proc.AbstractIndexProcedure
      com.bigdata.btree.proc.AbstractKeyArrayIndexProcedure
          com.bigdata.rdf.lexicon.Id2TermWriteProc

All Implemented Interfaces:

IIndexProcedure, IKeyArrayIndexProcedure, IParallelizableIndexProcedure, IMutableRelationIndexWriteProcedure, Externalizable, Serializable

public class Id2TermWriteProc
extends AbstractKeyArrayIndexProcedure
implements IParallelizableIndexProcedure, IMutableRelationIndexWriteProcedure

Unisolated write operation makes consistent assertions on the id:term index based on the data developed by the Term2IdWriteProc operation.

Version:

$Id: Id2TermWriteProc.java 5062 2011-08-20 23:37:29Z mrpersonick $

Author:

Bryan Thompson

See Also:

Serialized Form

Nested Class Summary

static class

Id2TermWriteProc.Id2TermWriteProcConstructor

Nested classes/interfaces inherited from class com.bigdata.btree.proc.AbstractKeyArrayIndexProcedure

AbstractKeyArrayIndexProcedure.ResultBitBuffer, AbstractKeyArrayIndexProcedure.ResultBitBufferCounter, AbstractKeyArrayIndexProcedure.ResultBitBufferHandler, AbstractKeyArrayIndexProcedure.ResultBuffer, AbstractKeyArrayIndexProcedure.ResultBufferHandler

Field Summary

Fields inherited from class com.bigdata.btree.proc.AbstractKeyArrayIndexProcedure

DEBUG, log

Constructor Summary

	Id2TermWriteProc() De-serialization constructor.
protected	Id2TermWriteProc(IRabaCoder keysCoder, IRabaCoder valsCoder, int fromIndex, int toIndex, byte[][] keys, byte[][] vals)

Method Summary

Object	apply(IIndex ndx) Conditionally inserts each key-value pair into the index.
boolean	isReadOnly() Return true iff the procedure asserts that it will not write on the index.

Methods inherited from class com.bigdata.btree.proc.AbstractKeyArrayIndexProcedure

getKey, getKeyCount, getKeys, getValue, getValues, readExternal, readMetadata, writeExternal, writeMetadata

Methods inherited from class com.bigdata.btree.proc.AbstractIndexProcedure

getKeyBuilder

Methods inherited from class java.lang.Object

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

Constructor Detail

Id2TermWriteProc

public Id2TermWriteProc()

De-serialization constructor.

Id2TermWriteProc

protected Id2TermWriteProc(IRabaCoder keysCoder,
                           IRabaCoder valsCoder,
                           int fromIndex,
                           int toIndex,
                           byte[][] keys,
                           byte[][] vals)

Method Detail

isReadOnly

public final boolean isReadOnly()

Description copied from interface: IIndexProcedure

Return true iff the procedure asserts that it will not write on the index. When true, the procedure may be run against a view of the index that is read-only or which allows concurrent processes to read on the same index object. When false the procedure will be run against a mutable view of the index (assuming that the procedure is executed in a context that has access to a mutable index view).

Specified by:

isReadOnly in interface IIndexProcedure

apply

public Object apply(IIndex ndx)

Conditionally inserts each key-value pair into the index. The keys are the term identifiers. The values are the terms as serialized by BigdataValueSerializer. Since a conditional insert is used, the operation does not cause terms that are already known to the ids index to be re-inserted, thereby reducing writes of dirty index nodes.

Specified by:

apply in interface IIndexProcedure

Parameters:

ndx - The index.

Returns:

null.