## Class InflationInterpolatedRateComputation

• java.lang.Object
• com.opengamma.strata.product.rate.InflationInterpolatedRateComputation
• All Implemented Interfaces:
RateComputation, java.io.Serializable, Bean, ImmutableBean

public final class InflationInterpolatedRateComputation
extends java.lang.Object
implements RateComputation, ImmutableBean, java.io.Serializable
Defines the computation of inflation figures from a price index with interpolation.

A price index is typically published monthly and has a delay before publication. The rate observed by this instance will be based on four observations of the index, two relative to the accrual start date and two relative to the accrual end date. Linear interpolation based on the number of days of the payment month is used to find the appropriate value for each pair of observations.

Serialized Form
• ### Nested Class Summary

Nested Classes
Modifier and Type Class Description
static class  InflationInterpolatedRateComputation.Meta
The meta-bean for InflationInterpolatedRateComputation.
• ### Method Summary

All Methods
Modifier and Type Method Description
void collectIndices​(com.google.common.collect.ImmutableSet.Builder<Index> builder)
Collects all the indices referred to by this computation.
boolean equals​(java.lang.Object obj)
PriceIndexObservation getEndObservation()
Gets the observation at the end.
PriceIndexObservation getEndSecondObservation()
Gets the observation for interpolation at the end.
PriceIndex getIndex()
Gets the Price index.
PriceIndexObservation getStartObservation()
Gets the observation at the start.
PriceIndexObservation getStartSecondObservation()
Gets the observation for interpolation at the start.
double getWeight()
Gets the positive weight used when interpolating.
int hashCode()
static InflationInterpolatedRateComputation.Meta meta()
The meta-bean for InflationInterpolatedRateComputation.
InflationInterpolatedRateComputation.Meta metaBean()
static InflationInterpolatedRateComputation of​(PriceIndex index, java.time.YearMonth referenceStartMonth, java.time.YearMonth referenceEndMonth, double weight)
Creates an instance from an index, reference start month and reference end month.
java.lang.String toString()
• ### Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait
• ### Methods inherited from interface org.joda.beans.Bean

property, propertyNames
• ### Method Detail

• #### of

public static InflationInterpolatedRateComputation of​(PriceIndex index,
java.time.YearMonth referenceStartMonth,
java.time.YearMonth referenceEndMonth,
double weight)
Creates an instance from an index, reference start month and reference end month.

The second start/end observations will be one month later than the start/end month.

Parameters:
index - the index
referenceStartMonth - the reference start month
referenceEndMonth - the reference end month
weight - the weight
Returns:
the inflation rate computation
• #### getIndex

public PriceIndex getIndex()
Gets the Price index.
Returns:
the Price index
• #### collectIndices

public void collectIndices​(com.google.common.collect.ImmutableSet.Builder<Index> builder)
Description copied from interface: RateComputation
Collects all the indices referred to by this computation.

A computation will typically refer to one index, such as 'GBP-LIBOR-3M'. Each index that is referred to must be added to the specified builder.

Specified by:
collectIndices in interface RateComputation
Parameters:
builder - the builder to use
• #### meta

public static InflationInterpolatedRateComputation.Meta meta()
The meta-bean for InflationInterpolatedRateComputation.
Returns:
the meta-bean, not null
• #### metaBean

public InflationInterpolatedRateComputation.Meta metaBean()
Specified by:
metaBean in interface Bean
• #### getStartObservation

public PriceIndexObservation getStartObservation()
Gets the observation at the start.

The inflation rate is the ratio between the interpolated start and end observations. The start month is typically three months before the start of the period.

Returns:
the value of the property, not null
• #### getStartSecondObservation

public PriceIndexObservation getStartSecondObservation()
Gets the observation for interpolation at the start.

The inflation rate is the ratio between the interpolated start and end observations. The month is typically one month after the month of the start observation.

Returns:
the value of the property, not null
• #### getEndObservation

public PriceIndexObservation getEndObservation()
Gets the observation at the end.

The inflation rate is the ratio between the interpolated start and end observations. The end month is typically three months before the end of the period.

Returns:
the value of the property, not null
• #### getEndSecondObservation

public PriceIndexObservation getEndSecondObservation()
Gets the observation for interpolation at the end.

The inflation rate is the ratio between the interpolated start and end observations. The month is typically one month after the month of the end observation.

Returns:
the value of the property, not null
• #### getWeight

public double getWeight()
Gets the positive weight used when interpolating.

Given two price index observations, typically in adjacent months, the weight is used to determine the adjusted index value. The value is given by the formula (weight * price_index_1 + (1 - weight) * price_index_2).

Returns:
the value of the property
• #### equals

public boolean equals​(java.lang.Object obj)
Overrides:
equals in class java.lang.Object
• #### hashCode

public int hashCode()
Overrides:
hashCode in class java.lang.Object
• #### toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object