blasd.apex.core.collection

Class ApexMapHelper

java.lang.Object

blasd.apex.core.collection.ApexMapHelper

public class ApexMapHelper
extends Object

Various helpers for Map

Author:

Benoit Lacelle

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ApexMapHelper()

Method Summary

Modifier and Type	Method and Description
static <K,V> Map<K,V>	decoratePutAll(Map<? extends K,? extends V> first, Map<? extends K,? extends V> second)
static <K,V> Map<K,V>	fromLists(List<? extends K> keys, List<? extends V> values)
static <K1,V,K2 extends K1> Map<K1,V>	transcodeColumns(com.google.common.collect.BiMap<?,? extends K2> mapping, Map<K1,V> map)

Methods inherited from class java.lang.Object

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

Constructor Detail

ApexMapHelper

protected ApexMapHelper()

Method Detail

transcodeColumns

public static <K1,V,K2 extends K1> Map<K1,V> transcodeColumns(com.google.common.collect.BiMap<?,? extends K2> mapping,
                                                              Map<K1,V> map)

fromLists

public static <K,V> Map<K,V> fromLists(List<? extends K> keys,
                                       List<? extends V> values)

decoratePutAll

public static <K,V> Map<K,V> decoratePutAll(Map<? extends K,? extends V> first,
                                            Map<? extends K,? extends V> second)

Parameters:

first - the first Map to resolve

second - the second Map to resolve

Returns:

an Immutable Map where each .get is resolved by the first Map holding a non-null value for given key