DATACMNS-1359 - Improved exception message for missing accessors and getters.

The exception messages used in the PersistentProperty.getRequired(Getter|Setter|Wither|Field)(…) now mention the name of the property that's offending.

src/test/java/org/springframework/data/mapping/model/AnnotationBasedPersistentPropertyUnitTests.java

@@ -249,6 +249,50 @@ public class AnnotationBasedPersistentPropertyUnitTests<P extends AnnotationBase
 		});
 	}
 
+	@Test // DATACMNS-1359
+	public void missingRequiredGetterThrowsException() {
+
+		SamplePersistentProperty property = getProperty(Sample.class, "field");
+
+		assertThatExceptionOfType(IllegalArgumentException.class) //
+				.isThrownBy(() -> property.getRequiredGetter()) //
+				.withMessageContaining("field") //
+				.withMessageContaining(Sample.class.getName());
+	}
+
+	@Test // DATACMNS-1359
+	public void missingRequiredSetterThrowsException() {
+
+		SamplePersistentProperty property = getProperty(Sample.class, "field");
+
+		assertThatExceptionOfType(IllegalArgumentException.class) //
+				.isThrownBy(() -> property.getRequiredSetter()) //
+				.withMessageContaining("field") //
+				.withMessageContaining(Sample.class.getName());
+	}
+
+	@Test // DATACMNS-1359
+	public void missingRequiredWitherThrowsException() {
+
+		SamplePersistentProperty property = getProperty(Sample.class, "field");
+
+		assertThatExceptionOfType(IllegalArgumentException.class) //
+				.isThrownBy(() -> property.getRequiredWither()) //
+				.withMessageContaining("field") //
+				.withMessageContaining(Sample.class.getName());
+	}
+
+	@Test
+	public void missingRequiredFieldThrowsException() {
+
+		SamplePersistentProperty property = getProperty(NoField.class, "firstname");
+
+		assertThatExceptionOfType(IllegalArgumentException.class) //
+				.isThrownBy(() -> property.getRequiredField()) //
+				.withMessageContaining("firstname") //
+				.withMessageContaining(NoField.class.getName());
+	}
+
 	@SuppressWarnings("unchecked")
 	private Map<Class<? extends Annotation>, Annotation> getAnnotationCache(SamplePersistentProperty property) {
 		return (Map<Class<? extends Annotation>, Annotation>) ReflectionTestUtils.getField(property, "annotationCache");
@@ -428,4 +472,9 @@ public class AnnotationBasedPersistentPropertyUnitTests<P extends AnnotationBase
 		@Reference Sample sample;
 		Sample withoutAnnotation;
 	}
+
+	interface NoField {
+
+		String getFirstname();
+	}
 }