Support mongo repositories aggregation about springfilter HOT 4 CLOSED

spring-projects/spring-data-mongodb#3857

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I need to do some research, that's completely new to me. I also don't know for now if it's in the scope of the project. :)
You can always open pull requests if you got an idea for the implementation. The main file is here https://github.com/turkraft/spring-filter/blob/main/src/main/java/com/turkraft/springfilter/parser/generator/bson/BsonGenerator.java.

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The only idea i had was to change the annotation value in runtime. But i wasn't able to do it.
Do you know a way to make an annotation takes the value from the method params in runtime? (Param must be list or array of string or document)
Once done, the rest would be easier i think.

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Hi @chlegou

The new version supports Mongo aggregations. You can implement your custom operator/function if needed:

@Component
public class CustomFunction extends FilterFunction {

  protected CustomFunction() {
    super("customFunction");
  }

}

@Component
class CustomFunctionJsonNodeProcessor implements
    FilterFunctionProcessor<FilterJsonNodeTransformer, JsonNode> {

  @Override
  public Class<FilterJsonNodeTransformer> getTransformerType() {
    return FilterJsonNodeTransformer.class;
  }

  @Override
  public Class<CustomFunction> getDefinitionType() {
    return CustomFunction.class;
  }

  @Override
  public JsonNode process(FilterJsonNodeTransformer transformer, FunctionNode source) {
    // https://www.mongodb.com/docs/v6.0/reference/operator/aggregation/
    // return transformer.getObjectMapper().createObjectNode() ...
  }

}

Support for the @Aggregation annotation is out of scope for now though.

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