io.pravega.common.util

Class ToStringUtils

java.lang.Object

io.pravega.common.util.ToStringUtils

public class ToStringUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ToStringUtils()

Method Summary

Modifier and Type	Method and Description
static <K,V> java.lang.String	mapToString(java.util.Map<K,V> map) Transforms a map into a string of the from: "K1=V1, K2=V2, K3=V3" Where the string versions of the key and value are derived from their toString() function.
static <K,V> java.util.Map<K,V>	stringToMap(java.lang.String serialized, java.util.function.Function<java.lang.String,K> keyMaker, java.util.function.Function<java.lang.String,V> valueMaker) Performs the reverse of mapToString(Map).

Methods inherited from class java.lang.Object

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

Constructor Detail

ToStringUtils

public ToStringUtils()

Method Detail

mapToString

public static <K,V> java.lang.String mapToString(java.util.Map<K,V> map)

Transforms a map into a string of the from: "K1=V1, K2=V2, K3=V3" Where the string versions of the key and value are derived from their toString() function.

Type Parameters:

K - The type of the keys of the map.

V - The type of the values of the map.

Parameters:

map - The map to be serialized to a string

Returns:

A string representation of the map.

stringToMap

public static <K,V> java.util.Map<K,V> stringToMap(java.lang.String serialized,
                                                   java.util.function.Function<java.lang.String,K> keyMaker,
                                                   java.util.function.Function<java.lang.String,V> valueMaker)

Performs the reverse of mapToString(Map). It parses a map written in a string form back into a Java map. Note that in order to parse properly, it is important that none the keys or values that were serialized contain '=' or ',' characters as this prevents parsing. For this reason it should be noted that this simple format does not support nesting.

Type Parameters:

K - The type of the keys of the map.

V - The type of the values of the map.

Parameters:

serialized - The serialized form of the map.

keyMaker - The constructor for the key objects

valueMaker - The constructor for the value objects

Returns:

A map the corresponds to the serialized string.