Java Mongo Custom Serialization notes

Start with the Insert method

1. Org.springframework.data.mongodb.repository.support.SimpleMongoRepository.java Insert

2. Org.springframework.data.mongodb.core.MongoTemplate.java Todbobject

3. Org.springframework.data.mongodb.core.convert.MappingMongoConverter.java writeinternal

See the key code:

        mongopersistententity<?> entity = mappingcontext.getpersistententity (entityType);        Writeinternal (obj, dbo, entity);        Addcustomtypekeyifnecessary (typehint, obj, dbo);

The 2nd place writeinternal appears:

    //Write the PropertiesEntity.dowithproperties (NewPropertyhandler<mongopersistentproperty>() {             Public voidDowithpersistentproperty (Mongopersistentproperty prop) {if(Prop.equals (idproperty) | |!prop.iswritable ()) {                    return; } Object propertyobj=Accessor.getproperty (prop); if(NULL!=propertyobj) {                    if(!Conversions.issimpletype (Propertyobj.getclass ()))                    {writepropertyinternal (propertyobj, dbo, prop); } Else{writesimpleinternal (propertyobj, dbo, prop); }                }            }        });

which

entity = Org.springframework.data.mapping.model.BasicPersistentEntity

Writepropertyinternal enters a write that is not a simple property.

Then call Writeinternal to write the property, it can be seen that the non-simple property as an object to write the loop.

When writing the ID, call:

Org.springframework.data.mongodb.core.convert.QueryMapper.convertId method

/*** Converts the given raw ID value into either {@linkObjectId} or {@linkString}. *      * @paramID *@return     */     PublicObject Convertid (object ID) {if(id = =NULL) {            return NULL; }        if(IDinstanceofString) {            returnObjectid.isvalid (id.tostring ())? Conversionservice.convert (ID, ObjectId.class): ID; }        Try {            returnConversionservice.canconvert (Id.getclass (), ObjectId.class) ? Conversionservice.convert (ID, ObjectId.class): Delegateconverttomongotype (ID,NULL); } Catch(conversionexception o_o) {returnDelegateconverttomongotype (ID,NULL); }    }

There is no distinction between specific entity types or the depth of attributes in the root entity, which is relatively simple and rude.

Java Mongo Custom Serialization notes