DATAMONGO-1236 - Polishing.

Removed the creation of a BasicMongoPersistentEntity in favor of always handing ClassTypeInformation.OBJECT into the converter in case not entity can be found.

This makes sure type information is written for updates on properties of type Object (which essentially leads to no PersistentEntity being available).

Original pull request: spring-projects#301.

Author: odrotbohm

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/UpdateMapper.java

@@ -22,7 +22,6 @@
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.data.mapping.Association;
 import org.springframework.data.mapping.context.MappingContext;
-import org.springframework.data.mongodb.core.mapping.BasicMongoPersistentEntity;
 import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
 import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
 import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty.PropertyToFieldNameConverter;
@@ -67,8 +66,8 @@ public UpdateMapper(MongoConverter converter) {
 	 */
 	@Override
 	protected Object delegateConvertToMongoType(Object source, MongoPersistentEntity<?> entity) {
-		return entity == null ? super.delegateConvertToMongoType(source, null) : converter.convertToMongoType(source,
-				getTypeHintForEntity(source, entity));
+		return converter.convertToMongoType(source,
+				entity == null ? ClassTypeInformation.OBJECT : getTypeHintForEntity(source, entity));
 	}
 
 	/*
@@ -200,18 +199,6 @@ public MetadataBackedUpdateField(MongoPersistentEntity<?> entity, String key,
 			this.key = key;
 		}
 
-		@Override
-		@SuppressWarnings({ "rawtypes", "unchecked" })
-		public MongoPersistentEntity<?> getPropertyEntity() {
-
-			MongoPersistentEntity<?> entity = super.getPropertyEntity();
-			if (entity != null || getProperty() == null) {
-				return entity;
-			}
-
-			return new BasicMongoPersistentEntity(getProperty().getTypeInformation());
-		}
-
 		/*
 		 * (non-Javadoc)
 		 * @see org.springframework.data.mongodb.core.convert.QueryMapper.MetadataBackedField#getMappedKey()