Pfthb

I'm running against an issue I don't know whether it's possible to do.

I need to store a document class with known fields, but also I need to store it with unknown fields:

@Document
public class Metadata 

 @Indexed
 private String user;

 private Object metadata;

All these unknown fields are stored inside metadata field.

However, I know someone of them. I mean, inside metadata field there will be whichever thing user wants, but there're some fields application knows.

I'd like to know how to create indexes about these unknown-knowed metadata fields.

Example:

 user: user, metadata: known: v, unknown: nv }

I'd like to create an index at metadata.known field.

The problem is, since this field is not set a a java bean field, I'm not able to annotated it as @Indexed.

Any ideas?

As a guess, why don't you split the metadata Object in two?

One for known fields that you can index and other for the unknown that you cannot index. For example:

@Document
public class Metadata 

 @Indexed
 private String user;

 @Indexed
 private Object knownMetadata;

 private Object unknownMetadata;

As a result you will have something similar to:

 user: user, knownMetadata: knownField1: v, knownField2: nv, unknownMetadata: unknownField1: v, unknownField2: nv }

For known fields you can create an index with the compound index annotation. It does not actually force you to have a compound index.

Consider this bean:

@CompoundIndexes(
 @CompoundIndex(name="my_index", def = "'metadata.known' : 1", background=true),
)
@Document
@Document
public class Metadata 

 @Indexed
 private String user;

 private Object metadata;

This would now create an index on the field: metadata.known - you can do this on any of the known fields and define them in the annotation.