Package uk.gov.gchq.gaffer.accumulostore.key.core

Class AbstractCoreKeyRangeFactory

java.lang.Object

uk.gov.gchq.gaffer.accumulostore.key.core.AbstractCoreKeyRangeFactory

All Implemented Interfaces:

RangeFactory

Direct Known Subclasses:

ByteEntityRangeFactory, ClassicRangeFactory

public abstract class AbstractCoreKeyRangeFactory
extends Object
implements RangeFactory

Constructor Summary

Constructors

Constructor	Description
AbstractCoreKeyRangeFactory()

Method Summary

Modifier and Type	Method	Description
List<org.apache.accumulo.core.data.Range>	getRange(ElementId elementId, GraphFilters operation)	Returns a Range representing a query for the given ID
org.apache.accumulo.core.data.Range	getRangeFromPair(Pair<ElementId,ElementId> pairRange, GraphFilters operation)	Operation Returns a Range representing a query for all values between the given ElementIds taken from the minimum comparable byte value of the provided keys and the maximum comparable byte value.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCoreKeyRangeFactory

public AbstractCoreKeyRangeFactory()

Method Detail

getRange

public List<org.apache.accumulo.core.data.Range> getRange(ElementId elementId,
                                                          GraphFilters operation)
                                                   throws RangeFactoryException

Description copied from interface: RangeFactory

Returns a Range representing a query for the given ID

Specified by:

getRange in interface RangeFactory

Parameters:

elementId - the element id to get the range for

operation - the operation

Returns:

A List of Ranges that are required to return all elements that match the parameters of the query.

Throws:

RangeFactoryException - if a range could not be created

getRangeFromPair

public org.apache.accumulo.core.data.Range getRangeFromPair(Pair<ElementId,ElementId> pairRange,
                                                            GraphFilters operation)
                                                     throws RangeFactoryException

Description copied from interface: RangeFactory

Operation Returns a Range representing a query for all values between the given ElementIds taken from the minimum comparable byte value of the provided keys and the maximum comparable byte value. Note that depending on the serialisation mechanism used and your key design the results of a range query will differ. The intent here is that values in your gaffer.accumulostore instance should be ordered within the table so that Entities with an Integer Identifier occur in the order 1 2 3

So that a provided pair of 1 and 3 will return entities 1, 2 and 3.

Specified by:

getRangeFromPair in interface RangeFactory

Parameters:

pairRange - the pair of element ids to get the range for

operation - the operation

Returns:

A List of Ranges that are required to return all elements that match the parameters of the query.

Throws:

RangeFactoryException - if a range could not be created