Consider java.math and java.util types as simple types.

Closes #374

Author: mp911de

src/main/java/org/springframework/data/keyvalue/core/mapping/context/KeyValueMappingContext.java

@@ -15,6 +15,8 @@
  */
 package org.springframework.data.keyvalue.core.mapping.context;
 
+import java.util.Collections;
+
 import org.springframework.data.keyvalue.core.mapping.BasicKeyValuePersistentEntity;
 import org.springframework.data.keyvalue.core.mapping.KeySpaceResolver;
 import org.springframework.data.keyvalue.core.mapping.KeyValuePersistentEntity;
@@ -39,6 +41,10 @@ public class KeyValueMappingContext<E extends KeyValuePersistentEntity<?, P>, P
 
 	private @Nullable KeySpaceResolver fallbackKeySpaceResolver;
 
+	public KeyValueMappingContext() {
+		setSimpleTypeHolder(new KeyValueSimpleTypeHolder());
+	}
+
 	/**
 	 * Configures the {@link KeySpaceResolver} to be used if not explicit key space is annotated to the domain type.
 	 *
@@ -59,4 +65,24 @@ protected <T> E createPersistentEntity(TypeInformation<T> typeInformation) {
 	protected P createPersistentProperty(Property property, E owner, SimpleTypeHolder simpleTypeHolder) {
 		return (P) new KeyValuePersistentProperty<>(property, owner, simpleTypeHolder);
 	}
+
+	/**
+	 * @since 2.5.1
+	 */
+	private static class KeyValueSimpleTypeHolder extends SimpleTypeHolder {
+
+		public KeyValueSimpleTypeHolder() {
+			super(Collections.emptySet(), true);
+		}
+
+		@Override
+		public boolean isSimpleType(Class<?> type) {
+
+			if (type.getName().startsWith("java.math.") || type.getName().startsWith("java.util.")) {
+				return true;
+			}
+
+			return super.isSimpleType(type);
+		}
+	}
 }

src/test/java/org/springframework/data/keyvalue/core/mapping/context/KeyValueMappingContextUnitTests.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.keyvalue.core.mapping.context;
+
+import static org.assertj.core.api.Assertions.*;
+
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.util.UUID;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.data.keyvalue.core.mapping.KeyValuePersistentEntity;
+import org.springframework.data.keyvalue.core.mapping.KeyValuePersistentProperty;
+
+/**
+ * Unit test for {@link KeyValueMappingContext}.
+ *
+ * @author Mark Paluch
+ */
+class KeyValueMappingContextUnitTests<P extends KeyValuePersistentProperty<P>> {
+
+	@Test
+	void shouldNotCreateEntitiesForJavaStandardTypes() {
+
+		KeyValueMappingContext<KeyValuePersistentEntity<?, P>, P> mappingContext = new KeyValueMappingContext<>();
+
+		assertThat(mappingContext.getPersistentEntity(BigInteger.class)).isNull();
+		assertThat(mappingContext.getPersistentEntity(BigDecimal.class)).isNull();
+		assertThat(mappingContext.getPersistentEntity(UUID.class)).isNull();
+	}
+}