Mapping multidimensional array from Mongo to Java application

Question

I need to retrieve data from MongoDB. I am using Spring framework and MongoRepository. My problem is that the data is written to the DB by a different application as 2-element double array. This is the document as seen in MongoDB:

{    
    "options" : {
       "ampWavelength" : 3000,
       "continuumWindows" : [ 
           {
               "0" : 1140,
               "1" : 1150
           }, 
           {
               "0" : 1275,
               "1" : 1280
           }, 
           {
               "0" : 1320,
               "1" : 1330
           }]
    }
}

The problem is I can't retrieve the array with fields named "0" or "1". Is there any trick to it? So far I have tried creating "continuumWindows" object with fields named "_0" and "_1" or making a "double[][] continuumWindows" variable but neither has worked for me - I either retrieve 0, null or get an error.

I have the same result when using "@JsonProperty("0")". I retrieve 0.0. — Quass1m
– Quass1m, Commented May 7, 2016 at 14:37

PiKos · Accepted Answer · 2016-05-07 16:11:06Z

1

Use @Field annotation. Example:

public class ContinuumWindow {

    @Field(value = "0")
    private int elementZero;

    @Field(value = "1")
    private int elementOne;

}

answered May 7, 2016 at 16:11

PiKos

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1 Comment

Quass1m Over a year ago

Thank you. I am just beginning to use Spring and forgot about this annotation.

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