Spring数据mongodb聚合按列表过滤

Question

I followed the example in this question Create filter aggregation in spring to create filter in aggregation on spring data mongodb. In the example the filter search by valueOf and equalToValue to create an $eq. How can I create an $in and pass a list?

This is my code:

ProjectionOperation p2 = project()
            .andExpression("name").as("name")
            .andExpression("version._id").as("version._id")
            .andExpression("version.version").as("version.version")
            .and(filter("version.cat")
                    .as("cat")
                    .by(valueOf("cat._id")
                            .equalToValue(new ObjectId("5de99f42f15273c92d1228e8"))))
            .as("version.cat");

and I'm looking for something like this:

**ProjectionOperation p2 = project()
            .andExpression("name").as("name")
            .andExpression("version._id").as("version._id")
            .andExpression("version.version").as("version.version")
            .and(filter("version.cat")
                    .as("cat")
                    .by(new Criteria("cat")
                            .in(Arrays.asList(
                                    new ObjectId("5de99f42f15273c92d1228f7"),
                                    new ObjectId("5de99f42f15273c92d1228f9"))
                            )
                            .getCriteriaObject()
                    )).as("version.cat"));

Thank you for your answers.

Answer 1

I can resolve this problem with ArrayOperators :

ProjectionOperation p2 = project()
            .andExpression("name").as("name")
            .andExpression("version._id").as("version._id")
            .andExpression("version.version").as("version.version")
            .and(filter("version.cat")
                    .as("cat")
                    .by(
                            ArrayOperators.In
                                    .arrayOf(Arrays.asList(
                                            new ObjectId("5de99f42f15273c92d1251853"),
                                            new ObjectId("5de99f42f15273c92d1251854"),
                                    )
                                    ).containsValue("$$cat._id")))
            .as("version.cat");

In arrayOf I pass the list that I want to compare with the value of each objectId. I think, the filter makes some class of 'for' to get each value of the cat list.