From 4cf8e37e7e1f1a1e134d05d0f5a0c0b81f1d953d Mon Sep 17 00:00:00 2001
From: Darin Kelkhoff <darin.kelkhoff@gmail.com>
Date: Wed, 22 Feb 2023 11:22:14 -0600
Subject: [PATCH] Add good getFirstNonNull method

---
 .../qqq/backend/core/utils/ValueUtils.java    | 25 +++++++++++++++++++
 .../backend/core/utils/ValueUtilsTest.java    | 22 +++++++++++++++-
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ValueUtils.java b/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ValueUtils.java
index a870540b..ef24a030 100644
--- a/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ValueUtils.java
+++ b/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ValueUtils.java
@@ -728,4 +728,29 @@ public class ValueUtils
          .with(ChronoField.NANO_OF_DAY, 0);
       return (startOfMonth.toInstant(zone.getRules().getOffset(computerTime)));
    }
+
+
+
+   /*******************************************************************************
+    ** Return the first argument that isn't null.
+    ** If all were null, return null.
+    *******************************************************************************/
+   public static <T> T getFirstNonNull(T... ts)
+   {
+      if(ts == null || ts.length == 0)
+      {
+         return (null);
+      }
+
+      for(T t : ts)
+      {
+         if(t != null)
+         {
+            return (t);
+         }
+      }
+
+      return (null);
+   }
+
 }
diff --git a/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ValueUtilsTest.java b/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ValueUtilsTest.java
index 90ff443a..fdec3ae4 100644
--- a/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ValueUtilsTest.java
+++ b/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ValueUtilsTest.java
@@ -268,8 +268,28 @@ class ValueUtilsTest extends BaseTest
       assertEquals("1", ValueUtils.getValueAsType(String.class, 1));
       assertEquals(BigDecimal.ONE, ValueUtils.getValueAsType(BigDecimal.class, 1));
       assertEquals(true, ValueUtils.getValueAsType(Boolean.class, "true"));
-      assertArrayEquals("a".getBytes(StandardCharsets.UTF_8), ValueUtils.getValueAsType(byte[].class, "a"));
+      assertArrayEquals("a" .getBytes(StandardCharsets.UTF_8), ValueUtils.getValueAsType(byte[].class, "a"));
       assertThrows(QValueException.class, () -> ValueUtils.getValueAsType(Serializable.class, 1));
    }
 
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testGetFirstNonNull()
+   {
+      assertEquals(0, ValueUtils.getFirstNonNull(0));
+      assertEquals(1, ValueUtils.getFirstNonNull(1, 2));
+      assertEquals(2, ValueUtils.getFirstNonNull(null, 2));
+      assertEquals(3, ValueUtils.getFirstNonNull(null, null, 3));
+
+      assertNull(ValueUtils.getFirstNonNull());
+      assertNull(ValueUtils.getFirstNonNull(new Object[] { }));
+      assertNull(ValueUtils.getFirstNonNull(null));
+      assertNull(ValueUtils.getFirstNonNull(null, null));
+
+   }
+
 }
\ No newline at end of file