cloud.metaapi.sdk.util

Class Js

java.lang.Object

cloud.metaapi.sdk.util.Js

public class Js
extends Object

JavaScript-like helper functions

Constructor Summary

Constructors

Constructor and Description
Js()

Method Summary

Modifier and Type	Method and Description
static <T> com.fasterxml.jackson.databind.JsonNode	asJson(T... pairs) Creates a json from variadic value pairs
static <T,U> Map<T,U>	asMap(org.apache.commons.lang3.tuple.Pair<T,U>... pairs) Creates a hash map from variadic value pairs
static <T> Map<T,T>	asMap(T... pairs) Creates a hash map from variadic value pairs
static void	log(Object... data)
static <T> T	or(T... values) Alternative to JavaScript a || b || c ...
static <U,T> U	reduce(List<T> list, java.util.function.BiFunction<U,T,U> reducer, U initialValue) JavaScript-like reduce
static Timer	setInterval(Runnable callback, int msInterval) Setups interval with JavaScript-like syntax
static Timer	setTimeout(Runnable callback, int msInterval) Setups timeout with JavaScript-like syntax
static void	sleep(int milliseconds) Executes thread sleep with error handling
static void	trace(Object data) Logs specified data and its stack trace

Methods inherited from class java.lang.Object

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

Constructor Detail

Js

public Js()

Method Detail

reduce

public static <U,T> U reduce(List<T> list,
                             java.util.function.BiFunction<U,T,U> reducer,
                             U initialValue)

JavaScript-like reduce

Type Parameters:

U - Type of the accumulated value

T - Type of list elements to reduce from

Parameters:

list - list to reduce

reducer - reducer function

initialValue - initial value

Returns:

Accumulated value

or

@SafeVarargs
public static <T> T or(T... values)

Alternative to JavaScript a || b || c ... construction, where the first non-null and non-zero value is returned, otherwide the last value is returned

Type Parameters:

T - Type of values

Parameters:

values - Values to select from

Returns:

Selected value or null

asMap

@SafeVarargs
public static <T,U> Map<T,U> asMap(org.apache.commons.lang3.tuple.Pair<T,U>... pairs)

Creates a hash map from variadic value pairs

Type Parameters:

T - Type of the map keys

U - Type of the map values

Parameters:

pairs - Key-Value pairs

Returns:

Map created from the key-value pairs

asMap

@SafeVarargs
public static <T> Map<T,T> asMap(T... pairs)

Creates a hash map from variadic value pairs

Type Parameters:

T - Type of the map keys and values

Parameters:

pairs - Key-Value pairs

Returns:

Map created from the key-value pairs

asJson

@SafeVarargs
public static <T> com.fasterxml.jackson.databind.JsonNode asJson(T... pairs)

Creates a json from variadic value pairs

Type Parameters:

T - Type of the json keys and values

Parameters:

pairs - Key-Value pairs

Returns:

Json object created from the key-value pairs

setTimeout

public static Timer setTimeout(Runnable callback,
                               int msInterval)

Setups timeout with JavaScript-like syntax

Parameters:

callback - Callback to run

msInterval - Timeout in milliseconds

Returns:

Timeout handle

setInterval

public static Timer setInterval(Runnable callback,
                                int msInterval)

Setups interval with JavaScript-like syntax

Parameters:

callback - Callback to run

msInterval - Interval in milliseconds

Returns:

Interval handle

sleep

public static void sleep(int milliseconds)

Executes thread sleep with error handling

Parameters:

milliseconds - Milliseonds to sleep

log

public static void log(Object... data)

trace

public static void trace(Object data)

Logs specified data and its stack trace

Parameters:

data - Data to print