From f3efb341fc21739bf7d431ddcd26b57985dc8d80 Mon Sep 17 00:00:00 2001
From: Darin Kelkhoff <darin.kelkhoff@gmail.com>
Date: Fri, 29 Mar 2024 08:26:40 -0500
Subject: [PATCH] Add ifCan utility method

---
 .../qqq/backend/core/utils/ObjectUtils.java   | 24 +++++++++++++++++++
 .../backend/core/utils/ObjectUtilsTest.java   | 18 ++++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ObjectUtils.java b/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ObjectUtils.java
index 80901c44..0fa1566e 100644
--- a/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ObjectUtils.java
+++ b/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ObjectUtils.java
@@ -139,4 +139,28 @@ public class ObjectUtils
       return (b);
    }
 
+
+
+   /*******************************************************************************
+    ** Utility to test a chained unsafe expression CAN get to the end and return true.
+    **
+    ** e.g., instead of:
+    **   if(a && a.b && a.b.c && a.b.c.d)
+    ** we can do:
+    **   if(ifCan(() -> a.b.c.d))
+    **
+    ** Note - if the supplier returns null, that counts as false!
+    *******************************************************************************/
+   public static boolean ifCan(UnsafeSupplier<Boolean, ? extends Throwable> supplier)
+   {
+      try
+      {
+         return supplier.get();
+      }
+      catch(Throwable t)
+      {
+         return (false);
+      }
+   }
+
 }
diff --git a/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ObjectUtilsTest.java b/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ObjectUtilsTest.java
index c08486b5..08a308e6 100644
--- a/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ObjectUtilsTest.java
+++ b/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ObjectUtilsTest.java
@@ -25,7 +25,9 @@ package com.kingsrook.qqq.backend.core.utils;
 import org.junit.jupiter.api.Test;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 
 /*******************************************************************************
@@ -79,4 +81,20 @@ class ObjectUtilsTest
       assertEquals("else", ObjectUtils.tryAndRequireNonNullElse(() -> null, "else"));
    }
 
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testIfCan()
+   {
+      Object nullObject = null;
+      assertTrue(ObjectUtils.ifCan(() -> true));
+      assertTrue(ObjectUtils.ifCan(() -> "a".equals("a")));
+      assertFalse(ObjectUtils.ifCan(() -> 1 == 2));
+      assertFalse(ObjectUtils.ifCan(() -> nullObject.equals("a")));
+      assertFalse(ObjectUtils.ifCan(() -> null));
+   }
+
 }
\ No newline at end of file