com.hammurapi.extract

Class Subtract<T,C>

java.lang.Object

com.hammurapi.extract.ExtractorBase<T,V,C>

com.hammurapi.extract.Subtract<T,C>

All Implemented Interfaces:

BinaryExtractor<T,Number,C>, Extractor<T,Number,C>, Mappable<T,Number,C>

public class Subtract<T,C>
extends ExtractorBase<T,V,C>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	ArithmeticExtractor.PromotionLevel

Field Summary

Fields

Modifier and Type	Field and Description
protected Extractor<T,V,C>	leftExtractor
protected Extractor<T,V,C>	rightExtractor

Fields inherited from class com.hammurapi.extract.ExtractorBase

cost, costUnit, initialCost, invocations, nanos, totalCost

Constructor Summary

Constructors

Constructor and Description
Subtract(double initialCost, TimeUnit costUnit, Extractor<T,Number,C> leftExtractor, Extractor<T,Number,C> rightExtractor)

Method Summary

Methods

Modifier and Type	Method and Description
ComparisonResult	compareTo(Extractor<T,V,C> obj) Basic comparisons with True and False.
protected Object	doOp(double n1, double n2)
protected Object	doOp(float n1, float n2)
protected Object	doOp(int n1, int n2)
protected Object	doOp(long n1, long n2)
protected V	doOp(Object o1, Object o2)
protected V	extractInternal(C context, Map<C,Map<Extractor<T,? super V,C>,? super V>> cache, T... obj)
double	getCost()
Extractor<T,V,C>	getLeftExtractor()
Extractor<T,V,C>	getRightExtractor()
int	hashCode()
boolean	isContextDependent()
Extractor<T,V,C>	map(int[] map) Applies mapping to extractor.
protected Extractor<T,Number,C>	newInstance(Extractor<T,Number,C> leftExtractor, Extractor<T,Number,C> rightExtractor)
Set<Integer>	parameterIndices()
protected ArithmeticExtractor.PromotionLevel	promote(Number n1, Number n2)
String	toString()

Methods inherited from class com.hammurapi.extract.ExtractorBase

createCacheEntry, equals, extract

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.hammurapi.extract.Extractor

extract

Field Detail

leftExtractor

protected Extractor<T,V,C> leftExtractor

rightExtractor

protected Extractor<T,V,C> rightExtractor

Constructor Detail

Subtract

public Subtract(double initialCost,
        TimeUnit costUnit,
        Extractor<T,Number,C> leftExtractor,
        Extractor<T,Number,C> rightExtractor)

Method Detail

doOp

protected Object doOp(int n1,
          int n2)

doOp

protected Object doOp(long n1,
          long n2)

doOp

protected Object doOp(float n1,
          float n2)

doOp

protected Object doOp(double n1,
          double n2)

newInstance

protected Extractor<T,Number,C> newInstance(Extractor<T,Number,C> leftExtractor,
                                Extractor<T,Number,C> rightExtractor)

isContextDependent

public boolean isContextDependent()

Specified by:

isContextDependent in interface Extractor<T,V,C>

Returns:

True if extractor uses context for extraction. False if only object(s) are used.

parameterIndices

public Set<Integer> parameterIndices()

Specified by:

parameterIndices in interface Extractor<T,V,C>

Returns:

Indexes of objects which this extractor uses for computations.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

compareTo

public ComparisonResult compareTo(Extractor<T,V,C> obj)

Description copied from class: ExtractorBase

Basic comparisons with True and False.

Specified by:

compareTo in interface Extractor<T,V,C>

Overrides:

compareTo in class ExtractorBase<T,V,C>

Parameters:

obj - Other extractor

Returns:

Comparison result.

extractInternal

protected V extractInternal(C context,
                Map<C,Map<Extractor<T,? super V,C>,? super V>> cache,
                T... obj)

Specified by:

extractInternal in class ExtractorBase<T,V,C>

doOp

protected V doOp(Object o1,
     Object o2)

promote

protected ArithmeticExtractor.PromotionLevel promote(Number n1,
                                         Number n2)

toString

public String toString()

Overrides:

toString in class Object

getCost

public double getCost()

Specified by:

getCost in interface Extractor<T,V,C>

Overrides:

getCost in class ExtractorBase<T,V,C>

Returns:

Extractor evaluation cost. Cost is used for optimization of computation intensive algorithms. E.g. in Store it is used for selection of indices for query operations.

map

public Extractor<T,V,C> map(int[] map)

Description copied from interface: Mappable

Applies mapping to extractor.

Specified by:

map in interface Mappable<T,V,C>

Returns:

Extractor with changed mapping or null if mapping is not possible.

getLeftExtractor

public Extractor<T,V,C> getLeftExtractor()

Specified by:

getLeftExtractor in interface BinaryExtractor<T,V,C>

getRightExtractor

public Extractor<T,V,C> getRightExtractor()

Specified by:

getRightExtractor in interface BinaryExtractor<T,V,C>