io.opencensus.common

Class Functions

java.lang.Object

io.opencensus.common.Functions

public final class Functions
extends Object

Commonly used Function instances.

Since:

0.5

Method Summary

Modifier and Type	Method and Description
static <T> Function<Object,T>	returnConstant(T constant) A Function that always ignores its argument and returns a constant value.
static <T> Function<Object,T>	returnNull() A Function that always ignores its argument and returns null.
static <T> Function<Object,T>	throwAssertionError() A Function that always ignores its argument and throws an AssertionError.
static <T> Function<Object,T>	throwIllegalArgumentException() A Function that always ignores its argument and throws an IllegalArgumentException.

Methods inherited from class java.lang.Object

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

Method Detail

returnNull

public static <T> Function<Object,T> returnNull()

A Function that always ignores its argument and returns null.

Returns:

a Function that always ignores its argument and returns null.

Since:

0.5

returnConstant

public static <T> Function<Object,T> returnConstant(T constant)

A Function that always ignores its argument and returns a constant value.

Returns:

a Function that always ignores its argument and returns a constant value.

Since:

0.5

throwIllegalArgumentException

public static <T> Function<Object,T> throwIllegalArgumentException()

A Function that always ignores its argument and throws an IllegalArgumentException.

Returns:

a Function that always ignores its argument and throws an IllegalArgumentException.

Since:

0.5

throwAssertionError

public static <T> Function<Object,T> throwAssertionError()

A Function that always ignores its argument and throws an AssertionError.

Returns:

a Function that always ignores its argument and throws an AssertionError.

Since:

0.6