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Add NullKeyToEmptyStringSerializer - to allow jackson serialization of a map with a null key

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This commit is contained in:
darin.kelkhoff
2024-12-11 14:40:06 -06:00
parent f3546da8cc
commit 5434721c8e
2 changed files with 74 additions and 1 deletions
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30
qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/utils/JsonUtilsTest.java
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@ -35,11 +35,13 @@ import com.kingsrook.qqq.backend.core.model.actions.tables.query.QFilterCriteria
import com.kingsrook.qqq.backend.core.model.actions.tables.query.QFilterOrderBy;
import com.kingsrook.qqq.backend.core.model.actions.tables.query.QQueryFilter;
import com.kingsrook.qqq.backend.core.model.data.QRecord;
import com.kingsrook.qqq.backend.core.utils.collections.MapBuilder;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
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.assertNotNull;
@ -81,7 +83,7 @@ class JsonUtilsTest extends BaseTest
{
objectMapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);
});
assertThat(json).contains("""
"values":{"foo":"Foo","bar":3.14159,"baz":null}""");
}
@ -318,4 +320,30 @@ class JsonUtilsTest extends BaseTest
assertEquals("age", qQueryFilter.getOrderBys().get(0).getFieldName());
assertTrue(qQueryFilter.getOrderBys().get(0).getIsAscending());
}
/*******************************************************************************
**
*******************************************************************************/
@Test
void testNullKeyInMap()
{
Map<Object, String> mapWithNullKey = MapBuilder.of(null, "foo");
//////////////////////////////////////////////////////
// assert default behavior throws with null map key //
//////////////////////////////////////////////////////
assertThatThrownBy(() -> JsonUtils.toJson(mapWithNullKey)).rootCause().hasMessageContaining("Null key for a Map not allowed in JSON");
////////////////////////////////////////////////////////////////////////
// assert that the nullKeyToEmptyStringSerializer does what we expect //
////////////////////////////////////////////////////////////////////////
assertEquals("""
{"":"foo"}""", JsonUtils.toJson(mapWithNullKey, mapper ->
{
mapper.getSerializerProvider().setNullKeySerializer(JsonUtils.nullKeyToEmptyStringSerializer);
}));
}
}