algairim commented on a change in pull request #1297:
URL: https://github.com/apache/brooklyn-server/pull/1297#discussion_r800567823
##########
File path:
utils/common/src/main/java/org/apache/brooklyn/util/collections/CollectionFunctionals.java
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@@ -119,6 +115,35 @@ public T apply(Iterable<? extends T> input) {
@Override public String toString() { return "firstElementFunction"; }
}
+ public static class AllEqualsFunction implements Function<Iterable<?>,
Comparable<?>> {
+ private final Comparable<?> value;
+
+ public AllEqualsFunction(Comparable<?> value) {
+ if (Objects.isNull(value)) {
+ throw new IllegalArgumentException("The value to compare all
to must be defined");
+ }
+ this.value = value;
+ }
+
+ @Override
+ public Boolean apply(@Nullable Iterable<?> input) {
+ if (Objects.isNull(input) || Iterables.isEmpty(input)) return null;
Review comment:
Documented in 568af812d307c52c6cb7f1abbb6e363526ddd3ec
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