Package jetbrains.buildServer.util

Class Util

java.lang.Object

jetbrains.buildServer.util.Util

public class Util
extends java.lang.Object

General purpose utility functions

Author:

Sergey.Anchipolevsky Date: 18.10.2007

Constructor Summary

Constructors

Constructor	Description
Util()

Method Summary

Modifier and Type	Method	Description
static int	compare(long f, long s)	Compares two long values
static <T,E extends java.lang.Throwable> T	doUnderContextClassLoader(java.lang.ClassLoader cl, FuncThrow<T,E> action)	Performs an action under context class loader.
static <T> java.util.Map<T,T>	map(T... args)	Converts input arguments into a map: elements with even indexes are keys, elements with odd indexes are values.
static <T extends java.lang.Comparable> T	max(T o1, T o2)	Compares two comparables and return the greater one.
static <T> T	ofNullable(java.util.function.Supplier<T> value, T defaultValue)	Nullable of supplier with default
static <T> T	ofNullable(T value, java.util.function.Supplier<T> defaultValue)	Nullable with default
static <T> T	ofNullable(T value, T defaultValue)	Nullable with default
static int	unbox(java.lang.Integer nullable, int nullValue)	Unbox nullable
static <T extends java.lang.Throwable> T	unwrapCause(java.lang.Throwable t, java.lang.Class<T> causeClass)
static java.lang.Throwable	unwrapCause(java.lang.Throwable t, java.lang.String causeClassName)

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

max

@Nullable
public static <T extends java.lang.Comparable> T max(@Nullable
                                                     T o1,
                                                     @Nullable
                                                     T o2)

Compares two comparables and return the greater one. If both are equal any of them can be returned. If one is null the other is returned. If both are nulls null is returned.

Parameters:

o1 - the first comparable

o2 - the second comparable

Returns:

the greater one

compare

public static int compare(long f,
                          long s)

Compares two long values

Parameters:

f - the first value

s - the second value

Returns:

-1 when f < s; 0 when f == s; 1 when f > s

doUnderContextClassLoader

public static <T,E extends java.lang.Throwable> T doUnderContextClassLoader(@NotNull
                                                                                  java.lang.ClassLoader cl,
                                                                                  FuncThrow<T,E> action)
                                                                           throws E extends java.lang.Throwable

Performs an action under context class loader.

Type Parameters:

E - exception that action could throw

Parameters:

cl - classloader to set

action - action to run

Returns:

the value returned from action

Throws:

E - exception if action throws an exception.

E extends java.lang.Throwable

map

public static <T> java.util.Map<T,T> map(T... args)

Converts input arguments into a map: elements with even indexes are keys, elements with odd indexes are values. If the number of arguments is odd the last argument is considered as a key with a null value.

Type Parameters:

T - any type

Parameters:

args - arguments in the following format - key1, value1, key2, value2...

Returns:

the map

unbox

public static int unbox(@Nullable
                        java.lang.Integer nullable,
                        int nullValue)

Unbox nullable

Parameters:

nullable - Nullable to unbox

nullValue - Value in case nullable is null

Returns:

unboxed value if nullable is not null, nullValue otherwise

ofNullable

public static <T> T ofNullable(@Nullable
                               T value,
                               @NotNull
                               T defaultValue)

Nullable with default

Parameters:

value - actual value

defaultValue - value for null

Returns:

value if not null or default

ofNullable

public static <T> T ofNullable(@NotNull
                               java.util.function.Supplier<T> value,
                               @NotNull
                               T defaultValue)

Nullable of supplier with default

Parameters:

value - value supplier

defaultValue - value for null

Returns:

value if supplier returns not null or default

ofNullable

public static <T> T ofNullable(@Nullable
                               T value,
                               @NotNull
                               java.util.function.Supplier<T> defaultValue)

Nullable with default

Parameters:

value - actual value

defaultValue - supplier of value for null

Returns:

value if not null or default

unwrapCause

@Nullable
public static <T extends java.lang.Throwable> T unwrapCause(@Nullable
                                                            java.lang.Throwable t,
                                                            @NotNull
                                                            java.lang.Class<T> causeClass)

unwrapCause

@Nullable
public static java.lang.Throwable unwrapCause(@Nullable
                                              java.lang.Throwable t,
                                              @NotNull
                                              java.lang.String causeClassName)