org.openmrs.util

Class DoubleRange

java.lang.Object

org.openmrs.util.DoubleRange

All Implemented Interfaces:

Comparable<DoubleRange>

public class DoubleRange
extends Object
implements Comparable<DoubleRange>

Represents a bounded or unbounded numeric range. By default the range is closed (ake inclusive) on the low end and open (aka exclusive) on the high end: mathematically "[low, high)". (I'm not using the similarly-named class from Apache commons because it doesn't implement comparable, and because it only allows inclusive bounds.)

Constructor Summary

Constructors

Constructor and Description
DoubleRange() Should return null low and high if accessors are not called
DoubleRange(Double low, Double high) Should return infinite low and high if called with null parameters

Method Summary

Modifier and Type	Method and Description
int	compareTo(DoubleRange other) first sorts according to low-bound (ascending) then according to high-bound (descending) Should return plus 1 if this low is greater than other low Should return minus one if this low is lower than other low Should return plus one if both lows are equal but other high is greater than this high Should return minus one if both lows are equal but other high is less than this high Should return zero if both lows and both highs are equal Should return 1 if this range is wider than other range
boolean	contains(double d) BUG: this method should return false if both ends of the range are null.
boolean	equals(Object o)
Double	getHigh()
Double	getLow()
int	hashCode() Should return the same hashCode for objects representing the same interval
void	setHigh(Double high)
void	setLow(Double low)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleRange

public DoubleRange()

Should return null low and high if accessors are not called

DoubleRange

public DoubleRange(Double low,
                   Double high)

Should return infinite low and high if called with null parameters

Method Detail

getHigh

public Double getHigh()

Returns:

Returns the high. Should return correct value of high if it high was set previously Should return positive infinity if high was not set previously

setHigh

public void setHigh(Double high)

Parameters:

high - The high to set. Should set high to positive infinity on null parameter Should cause low to have the set value

getLow

public Double getLow()

Returns:

Returns the low. Should return correct value of low if low was set previously Should return negative infinity if low was not set previously

setLow

public void setLow(Double low)

Parameters:

low - The low to set. Should set low to negative infinity on null parameter Should cause low to have the set value

compareTo

public int compareTo(DoubleRange other)

first sorts according to low-bound (ascending) then according to high-bound (descending) Should return plus 1 if this low is greater than other low Should return minus one if this low is lower than other low Should return plus one if both lows are equal but other high is greater than this high Should return minus one if both lows are equal but other high is less than this high Should return zero if both lows and both highs are equal Should return 1 if this range is wider than other range

Specified by:

compareTo in interface Comparable<DoubleRange>

contains

public boolean contains(double d)

BUG: this method should return false if both ends of the range are null. It currently returns true in this case. checks whether a double is in this range

Parameters:

d - the Double to check for in this range

Returns:

true if d is in this range, false otherwise Should return true if parameter is in range Should return false if parameter is not in range Should return false if parameter is equal to high Should return true if parameter is equal to low Should return false if parameter is lower than low Should return false if both low and high are null

toString

public String toString()

Overrides:

toString in class Object

Returns:

a String representation of the DoubleRange Should print the range if high and low are not null and not infinite Should print empty high if high is infinite Should print empty low if low is infinite Should print empty string if low and high are infinite

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Should return the same hashCode for objects representing the same interval

Overrides:

hashCode in class Object