Package io.keikai.doc.collab.lib0

Class Maps

java.lang.Object

io.keikai.doc.collab.lib0.Maps

public class Maps
extends java.lang.Object

Map Utility

Method Summary

Modifier and Type	Method	Description
static <K,V> boolean	all(java.util.Map<K,V> m, java.util.function.BiPredicate<V,K> f)	Tests whether all key-value pairs pass the test implemented by the provided function.
static <K,V> boolean	any(java.util.Map<K,V> m, java.util.function.BiPredicate<V,K> f)	Tests whether any key-value pairs pass the test implemented by the provided function.
static <K,V> java.util.Map<K,V>	copy(java.util.Map<K,V> m)	Copies a Map object into a fresh Map object.
static <K,V> java.util.Map<K,V>	create()	Creates a new HashMap instance.
static <K,V,R> java.util.List<R>	map(java.util.Map<K,V> m, java.util.function.BiFunction<V,K,R> f)	Creates a List and populates it with the content of all key-value pairs using the provided function.
static <K,V> V	setIfUndefined(java.util.Map<K,V> map, K key, java.util.function.Supplier<V> createT)	Get map property.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static <K,V> java.util.Map<K,V> create()

Creates a new HashMap instance.

Returns:

A new HashMap instance.

copy

public static <K,V> java.util.Map<K,V> copy(java.util.Map<K,V> m)

Copies a Map object into a fresh Map object.

Type Parameters:

K - The type of the keys.

V - The type of the values.

Parameters:

m - The Map to copy.

Returns:

A new Map containing the same key-value pairs as the input Map.

setIfUndefined

public static <K,V> V setIfUndefined(java.util.Map<K,V> map,
                                           K key,
                                           java.util.function.Supplier<V> createT)

Get map property. Create the value using the provided supplier if the key is undefined and set the value in the map.

Type Parameters:

K - The type of the key.

V - The type of the value.

Parameters:

map - The Map to operate on.

key - The key to check in the map.

createT - A Supplier function to create the value if it doesn't exist in the map.

Returns:

The value associated with the key.

map

public static <K,V,R> java.util.List<R> map(java.util.Map<K,V> m,
                                                        java.util.function.BiFunction<V,K,R> f)

Creates a List and populates it with the content of all key-value pairs using the provided function.

Type Parameters:

K - The type of the key.

V - The type of the value.

R - The type of the result produced by the function.

Parameters:

m - The Map to operate on.

f - The function to apply to each key-value pair.

Returns:

A List of results.

any

public static <K,V> boolean any(java.util.Map<K,V> m,
                                      java.util.function.BiPredicate<V,K> f)

Tests whether any key-value pairs pass the test implemented by the provided function.

Type Parameters:

K - The type of the key.

V - The type of the value.

Parameters:

m - The Map to operate on.

f - The predicate function to apply to each key-value pair.

Returns:

True if any key-value pair passes the test, false otherwise.

all

public static <K,V> boolean all(java.util.Map<K,V> m,
                                      java.util.function.BiPredicate<V,K> f)

Tests whether all key-value pairs pass the test implemented by the provided function.

Type Parameters:

K - The type of the key.

V - The type of the value.

Parameters:

m - The Map to operate on.

f - The predicate function to apply to each key-value pair.

Returns:

True if all key-value pairs pass the test, false otherwise.