Package net.ME1312.Galaxi.Library

Class Util

java.lang.Object

net.ME1312.Galaxi.Library.Util

public final class Util
extends Object

Random Utility Class

Method Summary

Modifier and Type	Method	Description
static void	copyFromJar(ClassLoader loader, String resource, String destination)	Copy a file from the ClassLoader
static <K, V> List<K>	getBackwards(Map<K,V> map, V value)	Get keys by value from map
static <V> V	getCaseInsensitively(Map<String,V> map, String key)	Get an item from a map ignoring case
static <V> V	getNew(Collection<? extends V> existing, Supplier<V> generator)	Gets a new Variable that doesn't match the existing Variables
static boolean	isNull(Object value)	Checks a value to make sure it's not null
static boolean	isNull(Object... values)	Checks values to make sure they're not null
static <T> T	nullpo(T value)	Checks a value to make sure it's not null
static <T> T[]	nullpo(T... values)	Checks values to make sure they're not null
static <T> T[]	nullpoCopy(T[] values)	Checks an array of values to make sure they're not null and returns a trusted copy
static String	readAll(Reader rd)	Read Everything from Reader
static <R> R	reflect(Constructor<?> constructor, Object... arguments)	Construct an object using Reflection
static <R> R	reflect(Field field, Object instance)	Get a Field's value using Reflection
static void	reflect(Field field, Object instance, Object value)	Set a Field's value using Reflection
static <R> R	reflect(Method method, Object instance, Object... arguments)	Call a method using Reflection
static RuntimeException	sneakyThrow(Throwable e)	Sneak an exception past the compiler
static String	unescapeJavaString(String str)	Parse Java escapes in a String

Methods inherited from class java.lang.Object

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

Method Details

nullpo

public static <T> T nullpo(T value)

Checks a value to make sure it's not null

Parameters:

value - Value to check

Returns:

The value

Throws:

NullPointerException - if it is null

nullpo

@SafeVarargs
public static <T> T[] nullpo(T... values)

Checks values to make sure they're not null

Parameters:

values - Values to check

Returns:

The values array

Throws:

NullPointerException - if anything is null

nullpoCopy

public static <T> T[] nullpoCopy(T[] values)

Checks an array of values to make sure they're not null and returns a trusted copy

Parameters:

values - Array & values to check

Returns:

A trusted copy of the values array

Throws:

NullPointerException - if anything is null

isNull

public static boolean isNull(Object value)

Checks a value to make sure it's not null

Parameters:

value - Value to check

Returns:

true if it is null

isNull

public static boolean isNull(Object... values)

Checks values to make sure they're not null

Parameters:

values - Values to check

Returns:

true if anything is null

getBackwards

public static <K,
V> List<K> getBackwards(Map<K,V> map,
 V value)

Get keys by value from map

Type Parameters:

K - Key

V - Value

Parameters:

map - Map to search

value - Value to search for

Returns:

Search results

getCaseInsensitively

public static <V> V getCaseInsensitively(Map<String,V> map,
 String key)

Get an item from a map ignoring case

Type Parameters:

V - Value

Parameters:

map - Map to search

key - Key to search with

Returns:

Search Result

getNew

public static <V> V getNew(Collection<? extends V> existing,
 Supplier<V> generator)

Gets a new Variable that doesn't match the existing Variables

Type Parameters:

V - Variable Type

Parameters:

existing - Existing Variables

generator - Variable Generator

Returns:

Variable

readAll

public static String readAll(Reader rd)
                      throws IOException

Read Everything from Reader

Parameters:

rd - Reader

Returns:

Reader Contents

Throws:

IOException

copyFromJar

public static void copyFromJar(ClassLoader loader,
 String resource,
 String destination)

Copy a file from the ClassLoader

Parameters:

loader - ClassLoader

resource - Location From

destination - Location To

reflect

public static <R> R reflect(Field field,
 Object instance)
                     throws IllegalAccessException

Get a Field's value using Reflection

Type Parameters:

R - Return Type

Parameters:

field - Field to grab

instance - Object Instance (Null for static fields)

Returns:

Field Value

Throws:

IllegalAccessException

reflect

public static void reflect(Field field,
 Object instance,
 Object value)
                    throws IllegalAccessException

Set a Field's value using Reflection

Parameters:

field - Field to write to

instance - Object Instance (Null for static fields)

value - Value to write

Throws:

IllegalAccessException

reflect

public static <R> R reflect(Method method,
 Object instance,
 Object... arguments)
                     throws InvocationTargetException,
IllegalAccessException

Call a method using Reflection

Type Parameters:

R - Return Type

Parameters:

method - Method to call

instance - Object Instance (Null for static methods)

arguments - Method Arguments

Returns:

Returned Value

Throws:

InvocationTargetException

IllegalAccessException

reflect

public static <R> R reflect(Constructor<?> constructor,
 Object... arguments)
                     throws InvocationTargetException,
IllegalAccessException,
InstantiationException

Construct an object using Reflection

Type Parameters:

R - Return Type

Parameters:

constructor - Constructor to use

arguments - Constructor Arguments

Returns:

New Instance

Throws:

InvocationTargetException

IllegalAccessException

InstantiationException

sneakyThrow

public static RuntimeException sneakyThrow(Throwable e)

Sneak an exception past the compiler

Parameters:

e - Exception

Returns:

Nothing — this method will always throw the given exception

See Also:

• Use Try for sneaky exception handling

unescapeJavaString

public static String unescapeJavaString(String str)

Parse Java escapes in a String

Parameters:

str - String

Returns:

Unescaped String