44 lines
1.1 KiB
Java
44 lines
1.1 KiB
Java
package org.betterx.bclib.util;
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import java.util.*;
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public class CollectionsUtil {
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/**
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* Will return mutable copy of list.
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*
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* @param list {@link List} to make mutable.
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* @return {@link ArrayList} or original {@link List} if it is mutable.
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*/
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public static <E> List<E> getMutable(List<E> list) {
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if (list instanceof ArrayList) {
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return list;
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}
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return new ArrayList<>(list);
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}
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/**
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* Will return mutable copy of set.
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*
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* @param set {@link Set} to make mutable.
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* @return {@link HashSet} or original {@link Set} if it is mutable.
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*/
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public static <E> Set<E> getMutable(Set<E> set) {
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if (set instanceof HashSet) {
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return set;
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}
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return new HashSet<>(set);
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}
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/**
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* Will return mutable copy of map.
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*
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* @param map {@link Map} to make mutable.
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* @return {@link HashMap} or original {@link Map} if it is mutable.
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*/
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public static <K, V> Map<K, V> getMutable(Map<K, V> map) {
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if (map instanceof HashMap) {
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return map;
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}
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return new HashMap<>(map);
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}
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}
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