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Improve Performance by Avoiding Recalculating Constants #46

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Improve Performance by Avoiding Recalculating Constants #46

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11 changes: 7 additions & 4 deletions src/main/java/com/luckycatlabs/sunrisesunset/calculator/SolarEventCalculator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,9 @@
* Parent class of the Sunrise and Sunset calculator classes.
*/
public class SolarEventCalculator {
public static final BigDecimal RADIANS_TO_DEGREES_MULTIPLIER = new BigDecimal(180 / Math.PI);
public static final BigDecimal DEGREES_TO_RADIANS_MULTIPLIER = BigDecimal.valueOf(Math.PI / 180.0);
public static final BigDecimal HOURS_IN_DAY = BigDecimal.valueOf(24.0D);
final private Location location;
final private TimeZone timeZone;

Expand Down Expand Up @@ -304,7 +307,7 @@ private String getLocalTimeAsString(BigDecimal localTimeParam) {

BigDecimal localTime = localTimeParam;
if (localTime.compareTo(BigDecimal.ZERO) == -1) {
localTime = localTime.add(BigDecimal.valueOf(24.0D));
localTime = localTime.add(HOURS_IN_DAY);
}
String[] timeComponents = localTime.toPlainString().split("\\.");
int hour = Integer.parseInt(timeComponents[0]);
Expand Down Expand Up @@ -341,7 +344,7 @@ protected Calendar getLocalTimeAsCalendar(BigDecimal localTimeParam, Calendar da

BigDecimal localTime = localTimeParam;
if (localTime.compareTo(BigDecimal.ZERO) == -1) {
localTime = localTime.add(BigDecimal.valueOf(24.0D));
localTime = localTime.add(HOURS_IN_DAY);
resultTime.add(Calendar.HOUR_OF_DAY, -24);
}
String[] timeComponents = localTime.toPlainString().split("\\.");
Expand Down Expand Up @@ -385,11 +388,11 @@ private BigDecimal getArcCosineFor(BigDecimal radians) {
}

private BigDecimal convertRadiansToDegrees(BigDecimal radians) {
return multiplyBy(radians, new BigDecimal(180 / Math.PI));
return multiplyBy(radians, RADIANS_TO_DEGREES_MULTIPLIER);
}

private BigDecimal convertDegreesToRadians(BigDecimal degrees) {
return multiplyBy(degrees, BigDecimal.valueOf(Math.PI / 180.0));
return multiplyBy(degrees, DEGREES_TO_RADIANS_MULTIPLIER);
}

private BigDecimal multiplyBy(BigDecimal multiplicand, BigDecimal multiplier) {
Expand Down