org.rvpf.store.server.polator

Class Polator.Abstract

Object

Polator.Abstract

All Implemented Interfaces:

Polator

Direct Known Subclasses:

LevelPolator, LinearPolator

Enclosing interface:

Polator

public abstract static class Polator.Abstract
extends Object
implements Polator

Abstract.

Nested Class Summary

Nested classes/interfaces inherited from interface Polator

Polator.Abstract

Constructor Summary

Constructors

Constructor and Description
Abstract()

Method Summary

Modifier and Type	Method and Description
protected static Double	decode(PointValue pointValue) Decodes the value from a point value.
protected abstract PointValue	extrapolate(StoreValuesQuery polatedQuery, DateTime stamp, PointValue[] pointValuesBefore) Extrapolates a value.
protected abstract int	extrapolationNeedsBefore() Returns the number of values extrapolation needs before.
protected abstract PointValue	interpolate(StoreValuesQuery polatedQuery, DateTime stamp, PointValue[] pointValuesBefore, PointValue[] pointValuesAfter) Interpolates a value.
protected abstract int	interpolationNeedsAfter() Returns the number of values interpolation needs after.
protected abstract int	interpolationNeedsBefore() Returns the number of values interpolation needs before.
StoreValues	polate(StoreValuesQuery polatedQuery, StoreCursor storeCursor, Identity identity) Inter/extra-polates values for a store query.

Methods inherited from class Object

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

Constructor Detail

Abstract

public Abstract()

Method Detail

polate

public final StoreValues polate(StoreValuesQuery polatedQuery,
                                StoreCursor storeCursor,
                                Identity identity)

Inter/extra-polates values for a store query.

Specified by:

polate in interface Polator

Parameters:

polatedQuery - A query asking for inter/extra-polation.

storeCursor - The calling store cursor.

identity - The requesting identity.

Returns:

A point value for each synchronization position.

decode

@Nullable
 @CheckReturnValue
protected static final Double decode(@Nonnull
                                                                    PointValue pointValue)

Decodes the value from a point value.

Parameters:

pointValue - The point value.

Returns:

The numeric value (may be null).

extrapolate

@Nonnull
 @CheckReturnValue
protected abstract PointValue extrapolate(@Nonnull
                                                                        StoreValuesQuery polatedQuery,
                                                                        @Nonnull
                                                                        DateTime stamp,
                                                                        PointValue[] pointValuesBefore)

Extrapolates a value.

Parameters:

polatedQuery - The polated query.

stamp - The stamp for the synthesized value.

pointValuesBefore - The needed point values before.

Returns:

The point value.

extrapolationNeedsBefore

protected abstract int extrapolationNeedsBefore()

Returns the number of values extrapolation needs before.

Returns:

The number of values extrapolation needs before.

interpolate

@Nonnull
 @CheckReturnValue
protected abstract PointValue interpolate(@Nonnull
                                                                        StoreValuesQuery polatedQuery,
                                                                        @Nonnull
                                                                        DateTime stamp,
                                                                        PointValue[] pointValuesBefore,
                                                                        PointValue[] pointValuesAfter)

Interpolates a value.

Parameters:

polatedQuery - The polated query.

stamp - The stamp for the synthesized value.

pointValuesBefore - The needed point values before.

pointValuesAfter - The needed point values after.

Returns:

The point value.

interpolationNeedsAfter

protected abstract int interpolationNeedsAfter()

Returns the number of values interpolation needs after.

Returns:

The number of values interpolation needs after.

interpolationNeedsBefore

protected abstract int interpolationNeedsBefore()

Returns the number of values interpolation needs before.

Returns:

The number of values interpolation needs before.