Class ValueUtils

java.lang.Object

net.mtrop.doom.struct.utils.ValueUtils

public final class ValueUtils
extends Object

Simple utility functions around values.

Author:

Matthew Tropiano

Method Summary

Modifier and Type	Method	Description
static <T> T	get(Callable<T> callable)	This function calls the provided callable and returns its value.
static <T> T	parse(String s, Function<String,T> parseFunction)	Attempts to parse a string to another object.
static Boolean	parseBoolean(String s)	Attempts to parse a boolean from a string.
static boolean	parseBoolean(String s, boolean def)	Attempts to parse a boolean from a string.
static boolean[]	parseBooleanArray(String s, boolean[] def)	Attempts to parse an array of booleans from a string.
static boolean[]	parseBooleanArray(String s, String separatorRegex, boolean[] def)	Attempts to parse an array of booleans from a string.
static Byte	parseByte(String s)	Attempts to parse a byte from a string.
static byte	parseByte(String s, byte def)	Attempts to parse a byte from a string.
static byte[]	parseByteArray(String s, byte[] def)	Attempts to parse an array of bytes from a string.
static byte[]	parseByteArray(String s, String separatorRegex, byte[] def)	Attempts to parse an array of bytes from a string.
static Character	parseChar(String s)	Attempts to parse a char from a string.
static char	parseChar(String s, char def)	Attempts to parse a byte from a string.
static char[]	parseCharArray(String s, char[] def)	Attempts to parse an array of chars from a string.
static char[]	parseCharArray(String s, String separatorRegex, char[] def)	Attempts to parse an array of chars from a string.
static Double	parseDouble(String s)	Attempts to parse a double from a string.
static double	parseDouble(String s, double def)	Attempts to parse a double from a string.
static double[]	parseDoubleArray(String s, double[] def)	Attempts to parse an array of doubles from a string.
static double[]	parseDoubleArray(String s, String separatorRegex, double[] def)	Attempts to parse an array of doubles from a string.
static Float	parseFloat(String s)	Attempts to parse a float from a string.
static float	parseFloat(String s, float def)	Attempts to parse a float from a string.
static float[]	parseFloatArray(String s, float[] def)	Attempts to parse an array of floats from a string.
static float[]	parseFloatArray(String s, String separatorRegex, float[] def)	Attempts to parse an array of floats from a string.
static Integer	parseInt(String s)	Attempts to parse an int from a string.
static int	parseInt(String s, int def)	Attempts to parse an int from a string.
static int[]	parseIntArray(String s, int[] def)	Attempts to parse an array of integers from a string.
static int[]	parseIntArray(String s, String separatorRegex, int[] def)	Attempts to parse an array of integers from a string.
static Long	parseLong(String s)	Attempts to parse a long from a string.
static long	parseLong(String s, long def)	Attempts to parse a long from a string.
static long[]	parseLongArray(String s, long[] def)	Attempts to parse an array of longs from a string.
static long[]	parseLongArray(String s, String separatorRegex, long[] def)	Attempts to parse an array of longs from a string.
static Short	parseShort(String s)	Attempts to parse a short from a string.
static short	parseShort(String s, short def)	Attempts to parse a short from a string.
static short[]	parseShortArray(String s, short[] def)	Attempts to parse an array of shorts from a string.
static short[]	parseShortArray(String s, String separatorRegex, short[] def)	Attempts to parse an array of shorts from a string.

Methods inherited from class java.lang.Object

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

Method Details

get

public static <T> T get(Callable<T> callable)

This function calls the provided callable and returns its value. This is mostly for filling static fields on classes that would otherwise only need to be put in a static block.

Type Parameters:

T - the return type.

Parameters:

callable - the callable to call.

Returns:

the result of the callable.

Throws:

RuntimeException - if an exception occurs.

parse

public static <T> T parse(String s,
 Function<String,T> parseFunction)

Attempts to parse a string to another object.

Type Parameters:

T - the parse function return type.

Parameters:

s - the input string.

parseFunction - the parsing function.

Returns:

the interpreted object.

parseBoolean

public static Boolean parseBoolean(String s)

Attempts to parse a boolean from a string. If the string is empty or null, this returns null. If the string does not equal "true" (case ignored), this returns false.

Parameters:

s - the input string.

Returns:

the interpreted boolean.

parseByte

public static Byte parseByte(String s)

Attempts to parse a byte from a string. If the string is null or the empty string, this returns null.

Parameters:

s - the input string.

Returns:

the interpreted byte.

parseShort

public static Short parseShort(String s)

Attempts to parse a short from a string. If the string is null or the empty string, this returns null.

Parameters:

s - the input string.

Returns:

the interpreted short.

parseChar

public static Character parseChar(String s)

Attempts to parse a char from a string. If the string is null or the empty string, this returns null.

Parameters:

s - the input string.

Returns:

the first character in the string.

parseInt

public static Integer parseInt(String s)

Attempts to parse an int from a string. If the string is null or the empty string, this returns null.

Parameters:

s - the input string.

Returns:

the interpreted integer.

parseLong

public static Long parseLong(String s)

Attempts to parse a long from a string. If the string is null or the empty string, this returns null.

Parameters:

s - the input string.

Returns:

the interpreted long integer.

parseFloat

public static Float parseFloat(String s)

Attempts to parse a float from a string. If the string is null or the empty string, this returns null.

Parameters:

s - the input string.

Returns:

the interpreted float.

parseDouble

public static Double parseDouble(String s)

Attempts to parse a double from a string. If the string is null or the empty string, this returns null.

Parameters:

s - the input string.

Returns:

the interpreted double.

parseBoolean

public static boolean parseBoolean(String s,
 boolean def)

Attempts to parse a boolean from a string. If the string is null or the empty string, this returns def. If the string does not equal "true," this returns false.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the interpreted boolean or def if the input string is blank.

parseByte

public static byte parseByte(String s,
 byte def)

Attempts to parse a byte from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the interpreted byte or def if the input string is blank.

parseShort

public static short parseShort(String s,
 short def)

Attempts to parse a short from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the interpreted short or def if the input string is blank.

parseChar

public static char parseChar(String s,
 char def)

Attempts to parse a byte from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the first character in the string or def if the input string is blank.

parseInt

public static int parseInt(String s,
 int def)

Attempts to parse an int from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the interpreted integer or def if the input string is blank.

parseLong

public static long parseLong(String s,
 long def)

Attempts to parse a long from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the interpreted long integer or def if the input string is blank.

parseFloat

public static float parseFloat(String s,
 float def)

Attempts to parse a float from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the interpreted float or def if the input string is blank.

parseDouble

public static double parseDouble(String s,
 double def)

Attempts to parse a double from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the interpreted double or def if the input string is blank.

parseBooleanArray

public static boolean[] parseBooleanArray(String s,
 boolean[] def)

Attempts to parse an array of booleans from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "true, false, apple, false" becomes [true, false, false, false]

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of booleans or def if the input string is blank.

See Also:

• parseBoolean(String)

parseByteArray

public static byte[] parseByteArray(String s,
 byte[] def)

Attempts to parse an array of bytes from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "0, -5, 2, grape" becomes [0, -5, 2, 0]

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of bytes or def if the input string is blank.

See Also:

• parseByte(String)

parseShortArray

public static short[] parseShortArray(String s,
 short[] def)

Attempts to parse an array of shorts from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "0, -5, 2, grape" becomes [0, -5, 2, 0]

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of shorts or def if the input string is blank.

See Also:

• parseShort(String)

parseCharArray

public static char[] parseCharArray(String s,
 char[] def)

Attempts to parse an array of chars from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "apple, pear, b, g" becomes ['a', 'p', 'b', 'g']

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of characters or def if the input string is blank.

See Also:

• parseChar(String)

parseIntArray

public static int[] parseIntArray(String s,
 int[] def)

Attempts to parse an array of integers from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "0, -5, 2.1, grape" becomes [0, -5, 2, 0]

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of integers or def if the input string is blank.

See Also:

• parseInt(String)

parseFloatArray

public static float[] parseFloatArray(String s,
 float[] def)

Attempts to parse an array of floats from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "0.5, -5.4, 2, grape" becomes [0.5f, -5.4f, 2.0f, 0f]

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of floats or def if the input string is blank.

See Also:

• parseFloat(String)

parseLongArray

public static long[] parseLongArray(String s,
 long[] def)

Attempts to parse an array of longs from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "0, -5, 2, grape" becomes [0, -5, 2, 0]

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of long integers or def if the input string is blank.

See Also:

• parseLong(String)

parseDoubleArray

public static double[] parseDoubleArray(String s,
 double[] def)

Attempts to parse an array of doubles from a string. If the string is null or the empty string, this returns def. This assumes that the elements of the array are separated by comma-or-whitespace characters.

Example: "0.5, -5.4, 2, grape" becomes [0.5, -5.4, 2.0, 0.0]

Parameters:

s - the input string.

def - the fallback value to return.

Returns:

the array of doubles or def if the input string is blank.

See Also:

• parseDouble(String)

parseBooleanArray

public static boolean[] parseBooleanArray(String s,
 String separatorRegex,
 boolean[] def)

Attempts to parse an array of booleans from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of booleans or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseBoolean(String)

parseByteArray

public static byte[] parseByteArray(String s,
 String separatorRegex,
 byte[] def)

Attempts to parse an array of bytes from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of bytes or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseByte(String)

parseShortArray

public static short[] parseShortArray(String s,
 String separatorRegex,
 short[] def)

Attempts to parse an array of shorts from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of shorts or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseShort(String)

parseCharArray

public static char[] parseCharArray(String s,
 String separatorRegex,
 char[] def)

Attempts to parse an array of chars from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of characters or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseChar(String)

parseIntArray

public static int[] parseIntArray(String s,
 String separatorRegex,
 int[] def)

Attempts to parse an array of integers from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of integers or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseInt(String)

parseFloatArray

public static float[] parseFloatArray(String s,
 String separatorRegex,
 float[] def)

Attempts to parse an array of floats from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of floats or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseFloat(String)

parseLongArray

public static long[] parseLongArray(String s,
 String separatorRegex,
 long[] def)

Attempts to parse an array of longs from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of long integers or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseLong(String)

parseDoubleArray

public static double[] parseDoubleArray(String s,
 String separatorRegex,
 double[] def)

Attempts to parse an array of doubles from a string. If the string is null or the empty string, this returns def.

Parameters:

s - the input string.

separatorRegex - the regular expression to split the string into tokens.

def - the fallback value to return.

Returns:

the array of doubles or def if the input string is blank.

Throws:

NullPointerException - if separatorRegex is null.

See Also:

• parseDouble(String)