BigDecimalConverter issue

[שי גבעתי‎]

I'm breaking my head over this issue for more than a day without a solution. 

I'm using mongo-java-driver-3.5.0.jar with morphia-1.3.2.jar.

I have a POJO with a BigDecimal field, that I try to persist to db, using the following code: 

        morphia = new Morphia();

        morphia.mapPackage("objects.mongo");

        morphia.getMapper().getConverters().addConverter(new BigDecimalConverter());

        datastore = morphia.createDatastore(new MongoClient(), "myDb");

        datastore.ensureIndexes();

        MyClass myClass= new MyClass();

        myClass.setBigDecimal(new BigDecimal(1.11111111111111111111111111111));

        datastore.save(myClass);

But I get the following exception: 

Caused by: java.lang.RuntimeException: java.lang.NumberFormatException: Conversion to Decimal128 would require inexact rounding of 1.111111111111111160454356650006957352161407470703125

at org.mongodb.morphia.mapping.ValueMapper.toDBObject(ValueMapper.java:29)

at org.mongodb.morphia.mapping.Mapper.writeMappedField(Mapper.java:867)

at org.mongodb.morphia.mapping.Mapper.toDBObject(Mapper.java:982)

... 7 more

Caused by: java.lang.NumberFormatException: Conversion to Decimal128 would require inexact rounding of 1.111111111111111160454356650006957352161407470703125

at org.bson.types.Decimal128.ensureExactRounding(Decimal128.java:244)

at org.bson.types.Decimal128.clampAndRound(Decimal128.java:233)

at org.bson.types.Decimal128.<init>(Decimal128.java:169)

at org.bson.types.Decimal128.<init>(Decimal128.java:156)

at org.mongodb.morphia.converters.BigDecimalConverter.encode(BigDecimalConverter.java:81)

at org.mongodb.morphia.converters.Converters.toDBObject(Converters.java:232)

at org.mongodb.morphia.mapping.ValueMapper.toDBObject(ValueMapper.java:27)

... 9 more

I can't figure out what am I missing here?

All help would be appreciated

[capta...@gmail.com]

The Decimal128 type only supports up to 34 digits of precision.  (Generally, "precision" = total # of digits, while "scale" = # of decimal digits).   Whereas a Java BigDecimal can go higher.  So, before saving to the DB, you need to round the BigDecimal value (e.g. use BigDecimal.setScale()) method.