Support adding a key prefix for keyspaces.

We now support prefixing keyspaces by introducing PrefixKeyspaceResolver.

Closes #461

src/test/java/org/springframework/data/keyvalue/core/mapping/PrefixKeyspaceResolverUnitTests.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2022 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;
+
+import static org.assertj.core.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit tests for {@link PrefixKeyspaceResolver}.
+ *
+ * @author Mark Paluch
+ */
+class PrefixKeyspaceResolverUnitTests {
+
+	@Test // gh-461
+	void shouldApplyPrefix() {
+
+		var resolver = new PrefixKeyspaceResolver("foo", Class::getSimpleName);
+
+		assertThat(resolver.resolveKeySpace(Object.class)).isEqualTo("fooObject");
+	}
+}