public List<DBInput> getDistinctDBIn() {
		if (distinctIn == null) {
			synchronized(this) {
				if (getIn() == null)
					return null;

				List<DBInput> distinctIn = new ArrayList<DBInput>(getIn().size());

				for (DBInput input : getDBIn()) {

					if (input == null) 
						continue;

					if (input.getDBPrevOut() == null) {
						distinctIn.add(input);
						continue;
					}

					boolean found = false;
					for (DBInput existing : distinctIn) {

						if (existing == null || existing.getDBPrevOut() == null)
							continue;

						if (existing.getDBPrevOut().getAddress() != null && existing.getDBPrevOut().getAddress().equals(input.getDBPrevOut().getAddress())) {						
							found = true;
							existing.value += input.getPrevOut().value;
							break;
						}
					}

					if (!found) {					
						distinctIn.add(input);
					}
				}

				this.distinctIn = distinctIn;
			}
		}

		return distinctIn;
	}