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Add ifCan utility method

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This commit is contained in:
darin.kelkhoff
2024-03-29 08:26:40 -05:00
parent d0de637dee
commit f3efb341fc
2 changed files with 42 additions and 0 deletions
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24
qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/utils/ObjectUtils.java
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@ -139,4 +139,28 @@ public class ObjectUtils
return (b); 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);
}
}
} }

18
qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/ObjectUtilsTest.java
View File

@ -25,7 +25,9 @@ package com.kingsrook.qqq.backend.core.utils;
import org.junit.jupiter.api.Test; import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThatThrownBy; import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.jupiter.api.Assertions.assertEquals; 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.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
/******************************************************************************* /*******************************************************************************
@ -79,4 +81,20 @@ class ObjectUtilsTest
assertEquals("else", ObjectUtils.tryAndRequireNonNullElse(() -> null, "else")); 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));
}
} }