Merge pull request #333 from Ladicek/annotation-equivalence-hash-code

Add AnnotationInstance.equivalenceHashCode()
smallrye · Sep 25, 2023 · 310da1e · 310da1e
2 parents 3fa7a6c + 597e8e0
commit 310da1e
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diff --git a/core/src/main/java/org/jboss/jandex/AnnotationInstance.java b/core/src/main/java/org/jboss/jandex/AnnotationInstance.java
@@ -515,4 +515,16 @@ public boolean equivalentTo(AnnotationInstance other) {
 
         return name.equals(other.name) && Arrays.equals(values, other.values);
     }
+
+    /**
+     * Returns an equivalence hash code. This is consistent with {@link #equivalentTo(AnnotationInstance)},
+     * therefore no attention is paid to the annotation target.
+     *
+     * @return hash code consistent with annotation equivalence
+     */
+    public int equivalenceHashCode() {
+        int result = name.hashCode();
+        result = 31 * result + Arrays.hashCode(values);
+        return result;
+    }
 }
diff --git a/core/src/test/java/org/jboss/jandex/test/AnnotationInstanceTest.java b/core/src/test/java/org/jboss/jandex/test/AnnotationInstanceTest.java
@@ -1,5 +1,6 @@
 package org.jboss.jandex.test;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
@@ -48,5 +49,7 @@ private void testEqualityEquivalence(Index index) {
         assertTrue(foo.equivalentTo(foo2));
         assertFalse(foo.equivalentTo(bar));
         assertFalse(foo2.equivalentTo(bar));
+
+        assertEquals(foo.equivalenceHashCode(), foo2.equivalenceHashCode());
     }
 }