cakoose.util
Class LangUtil

java.lang.Object
  cakoose.util.LangUtil

public class LangUtil
extends Object

Constructor Summary

LangUtil()

Method Summary

static <T> T[]	A(T... elements) Returns the given list of values as an array.
static void	assertBadType(Object o)
static AssertionError	badType(Enum<?> e)
static AssertionError	badType(Object o) Returns an AssertionError with a helpful message about what the type of the given object is.
static <T,R> R	cast(T value)
static boolean	eq(Object a, Object b) Similar to "a.equals(b)" except it works when either value is null.
static RuntimeException	todo() Returns: new RuntimeException("todo").
static RuntimeException	todo(String s) Returns: new RuntimeException("todo: " + s).

Methods inherited from class java.lang.Object

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

Constructor Detail

LangUtil

public LangUtil()

Method Detail

badType

public static AssertionError badType(Object o)

Returns an AssertionError with a helpful message about what the type of the given object is. Example use:

 if (e instanceof BinaryOp) {
   BinaryOp b = (BinaryOp) e;
   ...
 } else if (e instanceof Literal) {
   Literal l = (Literal) e;
   ...
 } else {
   throw badType(e);
 }
 

badType

public static AssertionError badType(Enum<?> e)

assertBadType

public static void assertBadType(Object o)

cast

public static <T,R> R cast(T value)

A

public static <T> T[] A(T... elements)

Returns the given list of values as an array.

Example: String[] args = A("java", "-jar", "HelloWorld.jar")

todo

public static RuntimeException todo()

Returns: new RuntimeException("todo").

Example: throw todo().

todo

public static RuntimeException todo(String s)

Returns: new RuntimeException("todo: " + s).

Example: throw todo("error handling").

eq

public static boolean eq(Object a,
                         Object b)

Similar to "a.equals(b)" except it works when either value is null.