ReadOnlySparseVector.ReadOnlySparseVectorBinding (Market Risk Accelerator 1.9.1-jdk11 API)

java.lang.Object
- com.qfs.vector.binding.impl.AVectorBinding
- - com.qfs.vector.binding.impl.GenericVectorBinding
  - - com.activeviam.risk.core.vector.impl.ReadOnlySparseVector.ReadOnlySparseVectorBinding

All Implemented Interfaces:

com.qfs.vector.IVectorBinding

Enclosing class:

ReadOnlySparseVector
```
public static class ReadOnlySparseVector.ReadOnlySparseVectorBinding
extends com.qfs.vector.binding.impl.GenericVectorBinding
```
Custom binding to use more efficient custom ReadOnlySparseVector methods for aggregation methods: plus, minus and copyFrom. We are trying to avoid calling getDouble() for every index in the vector which ultimately calls getExplicitValueIndex() which takes O(N). This leads to a total time complexity of O(N2) for operations that use loops to call getDouble() for each element in a ReadOnlySparseVector - such as the aggregation functions. Instead of retrieving each double from the ReadOnlySparseVector to perform an operation, we can instead perform the operation in the ReadOnlySparseVector its-self. This allows us to keep track of where the Explicit values are located in the compressed representation of the vector rather than searching for a specific index for every Explicit value. This allows us to perform the aggregation operations in O(N) time and O(1) space.

Field Summary
- Fields inherited from class com.qfs.vector.binding.impl.GenericVectorBinding
  INSTANCE
- Fields inherited from class com.qfs.vector.binding.impl.AVectorBinding
  UNSAFE

Constructor Summary

Constructors
Constructor Description

ReadOnlySparseVectorBinding()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`copyFrom(com.qfs.vector.IVector source, com.qfs.vector.IVector destination)`
`void`	`minus(com.qfs.vector.IVector source, com.qfs.vector.IVector destination)`
`void`	`plus(com.qfs.vector.IVector source, com.qfs.vector.IVector destination)`

Methods inherited from class com.qfs.vector.binding.impl.GenericVectorBinding
applyAsDouble, applyAsFloat, applyAsInt, applyAsLong, checkIndex, equals, getInstance, minusNegativeValues, minusPositiveValues, plusNegativeValues, plusPositiveValues

Methods inherited from class com.qfs.vector.binding.impl.AVectorBinding
acquireFence, getMaxPos, getMaxUnroll, getPos, releaseFence

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ReadOnlySparseVectorBinding
```
public ReadOnlySparseVectorBinding()
```
- Method Detail
  - plus
```
public final void plus(com.qfs.vector.IVector source,
                       com.qfs.vector.IVector destination)
```
    Specified by:
    
    plus in interface com.qfs.vector.IVectorBinding
    
    Overrides:
    
    plus in class com.qfs.vector.binding.impl.GenericVectorBinding
  - minus
```
public final void minus(com.qfs.vector.IVector source,
                        com.qfs.vector.IVector destination)
```
    Specified by:
    
    minus in interface com.qfs.vector.IVectorBinding
    
    Overrides:
    
    minus in class com.qfs.vector.binding.impl.GenericVectorBinding
  - copyFrom
```
public final void copyFrom(com.qfs.vector.IVector source,
                           com.qfs.vector.IVector destination)
```
    Specified by:
    
    copyFrom in interface com.qfs.vector.IVectorBinding
    
    Overrides:
    
    copyFrom in class com.qfs.vector.binding.impl.GenericVectorBinding