MongoRoomBuilder.java 文件源码

public String reserved(JID jid) {
    // {"$match":{"jid":group.bare}}, {"$unwind":"$affiliations"}, {"$match":{"affiliations.jid":jid.bare}}, {"$project":{"nick":"$affiliations.nick"}}
    AggregationOutput output = MongoRoomBuilder.this.config.collection().aggregate(BasicDBObjectBuilder.start("$match", BasicDBObjectBuilder.start(Dictionary.FIELD_JID, this.group.asStringWithBare()).get()).get(), MongoRoomBuilder.this.unwind, BasicDBObjectBuilder.start("$match", BasicDBObjectBuilder.start(Dictionary.FIELD_AFFILIATIONS + "." + Dictionary.FIELD_JID, jid.asStringWithBare()).get()).get(), MongoRoomBuilder.this.project);
    @SuppressWarnings("deprecation")
    List<?> result = MongoUtils.asList(output.getCommandResult(), Dictionary.FIELD_RESULT);
    return result.isEmpty() ? null : MongoUtils.asString(DBObject.class.cast(result.get(0)), Dictionary.FIELD_NICK);
}