The following code fails to convert the data type from a boolean to a double (calling $set). If this feature is not supported by $set, perhaps the driver should check the data type and throw an illegal argument exception if the types do not match.

if (doc.containsField(SiteDocField.HAS_SYND_FEED.key)) {
final Object obj = doc.get(SiteDocField.HAS_SYND_FEED.key);
if (obj != null)

{ double value = convertToDouble(obj); pCol.update(new BasicDBObject(SiteDocField.ID.key, id), new BasicDBObject("$set", new BasicDBObject(SiteDocField.HAS_SYND_FEED.key, value)), false, false); }

else

{ doc.removeField(SiteDocField.HAS_SYND_FEED.key); pCol.save(doc); }

pDb.getDb().getLastError();
}

The code below successfully changes the data type (by calling save(doc)).

if (doc.containsField(SiteDocField.HAS_SYND_FEED.key)) {
final Object obj = doc.get(SiteDocField.HAS_SYND_FEED.key);
if (obj != null)

{ double value = convertToDouble(obj); // THIS IS THE CODE THAT WORKS doc.put(SiteDocField.HAS_SYND_FEED.key, value); pCol.save(doc); }

else

{ doc.removeField(SiteDocField.HAS_SYND_FEED.key); }

pCol.save(doc);
pDb.getDb().getLastError();
}