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Use Java 8's Map.getOrDefault() 

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This commit is contained in:
Gary Gregory 2024-09-01 16:12:14 -04:00
parent e99c2aeb9f
commit a91ae587a2
1 changed files with 12 additions and 12 deletions
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24
src/main/java/org/apache/commons/collections4/CollectionUtils.java
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@ -63,6 +63,8 @@ public class CollectionUtils {
*/ */
private static class CardinalityHelper<O> { private static class CardinalityHelper<O> {
private static final Integer ZERO = Integer.valueOf(0);
/** Contains the cardinality for each object in collection A. */ /** Contains the cardinality for each object in collection A. */
final Map<O, Integer> cardinalityA; final Map<O, Integer> cardinalityA;
@ -81,28 +83,26 @@ public class CollectionUtils {
/** /**
* Returns the frequency of this object in collection A. * Returns the frequency of this object in collection A.
* @param obj the object *
* @param key the key whose associated frequency is to be returned.
* @return the frequency of the object in collection A * @return the frequency of the object in collection A
*/ */
public int freqA(final Object obj) { public int freqA(final Object key) {
return getFreq(obj, cardinalityA); return getFreq(key, cardinalityA);
} }
/** /**
* Returns the frequency of this object in collection B. * Returns the frequency of this object in collection B.
* @param obj the object *
* @param key the key whose associated frequency is to be returned.
* @return the frequency of the object in collection B * @return the frequency of the object in collection B
*/ */
public int freqB(final Object obj) { public int freqB(final Object key) {
return getFreq(obj, cardinalityB); return getFreq(key, cardinalityB);
} }
private int getFreq(final Object obj, final Map<?, Integer> freqMap) { private int getFreq(final Object key, final Map<?, Integer> freqMap) {
final Integer count = freqMap.get(obj); return freqMap.getOrDefault(key, ZERO).intValue();
if (count != null) {
return count.intValue();
}
return 0;
} }
/** /**