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OAK-11496 : added utils method for replacing Guava's Iterables.all #2096

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Merged
rishabhdaim merged 1 commit into from
Feb 19, 2025
Merged

OAK-11496 : added utils method for replacing Guava's Iterables.all #2096

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15 changes: 15 additions & 0 deletions oak-commons/src/main/java/org/apache/jackrabbit/oak/commons/collections/IterableUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@
*/
package org.apache.jackrabbit.oak.commons.collections;

import org.apache.commons.collections4.IteratorUtils;
import org.apache.commons.collections4.Predicate;
import org.apache.commons.collections4.iterators.LazyIteratorChain;

import java.util.Iterator;
Expand Down Expand Up @@ -166,4 +168,17 @@ public static <E> boolean contains(final Iterable<E> iterable, final Object obje
public static int size(final Iterable<?> itr) {
return org.apache.commons.collections4.IterableUtils.size(itr);
}

/**
* Checks if all elements in the specified iterable match the given predicate.
*
* @param <E> the type of elements in the iterable
* @param itr the iterable to check, may not be null
* @param predicate the predicate to apply to elements, may not be null
* @return true if all elements match the predicate, false otherwise
* @throws NullPointerException if the iterable or predicate is null
*/
public static <E> boolean matchesAll(final Iterable<E> itr, final Predicate<? super E> predicate) {
return org.apache.commons.collections4.IterableUtils.matchesAll(itr, predicate);
}
}
36 changes: 36 additions & 0 deletions ...ommons/src/test/java/org/apache/jackrabbit/oak/commons/collections/IterableUtilsTest.java
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Expand Up @@ -18,6 +18,7 @@
*/
package org.apache.jackrabbit.oak.commons.collections;

import org.apache.commons.collections4.Predicate;
import org.junit.Assert;
import org.junit.Test;

Expand Down Expand Up @@ -218,4 +219,39 @@ public void testSizeWithSingleElement() {
public void testSizeWithNullIterable() {
Assert.assertEquals(0, IterableUtils.size(null));
}

@Test
public void testMatchesAllWithAllMatchingElements() {
Iterable<Integer> iterable = Arrays.asList(2, 4, 6);
Predicate<Integer> isEven = x -> x % 2 == 0;
Assert.assertTrue(IterableUtils.matchesAll(iterable, isEven));
}

@Test
public void testMatchesAllWithSomeNonMatchingElements() {
Iterable<Integer> iterable = Arrays.asList(2, 3, 6);
Predicate<Integer> isEven = x -> x % 2 == 0;
Assert.assertFalse(IterableUtils.matchesAll(iterable, isEven));
}

@Test
public void testMatchesAllWithEmptyIterable() {
Iterable<Integer> iterable = Collections.emptyList();
Predicate<Integer> isEven = x -> x % 2 == 0;
Assert.assertTrue(IterableUtils.matchesAll(iterable, isEven));
}

@Test
public void testMatchesAllWithNullIterable() {
Predicate<Integer> isEven = x -> x % 2 == 0;
Assert.assertTrue(IterableUtils.matchesAll(null, isEven));
}

@Test
public void testMatchesAllWithNullPredicate() {
Iterable<Integer> iterable = Arrays.asList(2, 4, 6);
Assert.assertThrows(NullPointerException.class, () -> {
IterableUtils.matchesAll(iterable, null);
});
}
}
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