org.apache.druid.java.util.common

Class Numbers

java.lang.Object

org.apache.druid.java.util.common.Numbers

public final class Numbers
extends Object

Method Summary

Modifier and Type	Method and Description
static boolean	parseBoolean(Object val) Parse the given object as a boolean.
static Double	parseDoubleObject(String val) Like tryParseDouble(java.lang.Object, double), but does not produce a primitive and will explode if unable to produce a Double similar to Double.parseDouble(java.lang.String)
static int	parseInt(Object val) Parse the given object as a int.
static long	parseLong(Object val) Parse the given object as a long.
static Long	parseLongObject(String val) Like tryParseLong(java.lang.Object, long) but does not produce a primitive and will explode if unable to produce a Long similar to Long.parseLong(java.lang.String, int)
static double	tryParseDouble(Object val, double nullValue) Try parsing the given Number or String object val as double.
static float	tryParseFloat(Object val, float nullValue) Try parsing the given Number or String object val as float.
static long	tryParseLong(Object val, long nullValue) Try parsing the given Number or String object val as long.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

parseLong

public static long parseLong(Object val)

Parse the given object as a long. The input object can be a String or one of the implementations of Number. You may want to use GuavaUtils.tryParseLong() instead if the input is a nullable string and you want to avoid any exceptions.

Throws:

NumberFormatException - if the input is an unparseable string.

NullPointerException - if the input is null.

ISE - if the input is not a string or a number.

parseInt

public static int parseInt(Object val)

Parse the given object as a int. The input object can be a String or one of the implementations of Number.

Throws:

NumberFormatException - if the input is an unparseable string.

NullPointerException - if the input is null.

ISE - if the input is not a string or a number.

parseBoolean

public static boolean parseBoolean(Object val)

Parse the given object as a boolean. The input object can be a String or Boolean.

Returns:

true only if the input is a Boolean representing true or a String of "true".

Throws:

NullPointerException - if the input is null.

ISE - if the input is not a string or a number.

tryParseDouble

public static double tryParseDouble(@Nullable
                                    Object val,
                                    double nullValue)

Try parsing the given Number or String object val as double.

Parameters:

val -

nullValue - value to return when input was string type but not parseable into double value

Returns:

parsed double value

tryParseLong

public static long tryParseLong(@Nullable
                                Object val,
                                long nullValue)

Try parsing the given Number or String object val as long.

Parameters:

val -

nullValue - value to return when input was string type but not parseable into long value

Returns:

parsed long value

tryParseFloat

public static float tryParseFloat(@Nullable
                                  Object val,
                                  float nullValue)

Try parsing the given Number or String object val as float.

Parameters:

val -

nullValue - value to return when input was string type but not parseable into float value

Returns:

parsed float value

parseDoubleObject

@Nullable
public static Double parseDoubleObject(@Nullable
                                                 String val)

Like tryParseDouble(java.lang.Object, double), but does not produce a primitive and will explode if unable to produce a Double similar to Double.parseDouble(java.lang.String)

parseLongObject

@Nullable
public static Long parseLongObject(@Nullable
                                             String val)

Like tryParseLong(java.lang.Object, long) but does not produce a primitive and will explode if unable to produce a Long similar to Long.parseLong(java.lang.String, int)