| 36 | } |
| 37 | |
| 38 | @Override |
| 39 | public DataPoints[] evaluate(final TSQuery data_query, |
| 40 | final List<DataPoints[]> query_results, final List<String> params) { |
| 41 | if (data_query == null) { |
| 42 | throw new IllegalArgumentException("Missing time series query"); |
| 43 | } |
| 44 | if (query_results == null || query_results.isEmpty()) { |
| 45 | return new DataPoints[]{}; |
| 46 | } |
| 47 | |
| 48 | if (query_results.size() < 2 || query_results.size() > 26) { |
| 49 | throw new IllegalArgumentException("Must have 2 to 26 series, got " + |
| 50 | query_results.size() + " instead"); |
| 51 | } |
| 52 | |
| 53 | final StringBuilder buf = new StringBuilder(); |
| 54 | char v = 'a'; |
| 55 | for (int i = 0; i < query_results.size(); i++) { |
| 56 | buf.append(v++); |
| 57 | if (i < query_results.size() - 1) { |
| 58 | buf.append(" / "); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | final ExpressionIterator expression = new ExpressionIterator("divideSeries", |
| 63 | buf.toString(), SetOperator.UNION, false, false); |
| 64 | v = 'a'; |
| 65 | |
| 66 | for (final DataPoints[] dps : query_results) { |
| 67 | final TimeSyncedIterator it = new TimeSyncedIterator( |
| 68 | Character.toString(v++), null, dps); |
| 69 | expression.addResults(it.getId(), it); |
| 70 | } |
| 71 | expression.compile(); |
| 72 | |
| 73 | final DataPoints[] results = new DataPoints[expression.values().length]; |
| 74 | for (int i = 0; i < expression.values().length; i++) { |
| 75 | results[i] = new EDPtoDPS(tsdb, i, expression); |
| 76 | } |
| 77 | return results; |
| 78 | } |
| 79 | |
| 80 | @Override |
| 81 | public String writeStringField(final List<String> query_params, |