Examples of org.dashbuilder.dataset.engine.index.DataSetGroupIndex

Package org.dashbuilder.dataset.engine.index

Examples of org.dashbuilder.dataset.engine.index.DataSetGroupIndex

org.dashbuilder.dataset.engine.index.DataSetGroupIndex
A DataSet group operation index

            if (context.lastGroupOp != null && context.lastGroupOp.getSelectedIntervalNames().isEmpty()) {
                return false;
            }


            // Create a root or nested group.
            DataSetGroupIndex groupIndex = null;
            if (context.lastGroupIndex == null) groupIndex = singleGroup(op, context);
            else groupIndex = nestedGroup(op, context.lastGroupIndex, context);


            // Select the group intervals (if any)
            groupIndex = selectIntervals(op, groupIndex);

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            if (intervalBuilder == null) throw new RuntimeException("Interval generator not supported.");


            // No index => Build required
            if (context.index == null) {
                IntervalList intervalList = intervalBuilder.build(new InternalHandler(context), columnGroup);
                return new DataSetGroupIndex(columnGroup, intervalList);
            }
            // Index match => Reuse it
            DataSetGroupIndex groupIndex = context.index.getGroupIndex(columnGroup);
            if (groupIndex != null) {
                return groupIndex;
            }
            // No index match => Build required
            chronometer.start();
            IntervalList intervalList = intervalBuilder.build(new InternalHandler(context), columnGroup);
            chronometer.stop();


            // Index before return.
            DataSetGroupIndex index = new DataSetGroupIndex(columnGroup, intervalList);
            index.setBuildTime(chronometer.elapsedTime());
            return context.index.indexGroup(index);
        }

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        }


        protected DataSetGroupIndex nestedGroup(DataSetGroup op, DataSetGroupIndex lastGroupIndex, InternalContext context) {


            // Index match => Reuse it
            DataSetGroupIndex nestedGroupIndex = lastGroupIndex.getGroupIndex(op.getColumnGroup());
            if (nestedGroupIndex != null) return nestedGroupIndex;


            // No index match => Create a brand new group index
            nestedGroupIndex = new DataSetGroupIndex(op.getColumnGroup());


            // Apply the nested group operation on each parent group interval.
            InternalContext nestedContext = new InternalContext(context.dataSet, null);
            List<DataSetIntervalIndex> intervalsIdxs = lastGroupIndex.getIntervalIndexes();
            for (DataSetIntervalIndex intervalIndex : intervalsIdxs) {


                // In a nested group the intervals can aggregate other intervals.
                if (intervalIndex instanceof DataSetIntervalSetIndex) {
                    DataSetIntervalSetIndex indexSet = (DataSetIntervalSetIndex) intervalIndex;
                    for (DataSetIntervalIndex subIndex : indexSet.getIntervalIndexes()) {
                        nestedContext.index = subIndex;
                        DataSetGroupIndex sg = singleGroup(op, nestedContext);
                        nestedGroupIndex.indexIntervals(sg.getIntervalIndexes());
                    }
                }
                // Or can just be single intervals.
                else {
                    nestedContext.index = intervalIndex;
                    DataSetGroupIndex sg = singleGroup(op, nestedContext);
                    nestedGroupIndex.indexIntervals(sg.getIntervalIndexes());
                }
            }
            context.index.indexGroup(nestedGroupIndex);
            return nestedGroupIndex;
        }

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        protected DataSetGroupIndex selectIntervals(DataSetGroup groupOp, DataSetGroupIndex groupIndex) {
            List<String> intervalNames = groupOp.getSelectedIntervalNames();
            if (intervalNames != null && !intervalNames.isEmpty()) {


                // Look for an existing selection index.
                DataSetGroupIndex selectionIndex = groupIndex.getSelectionIndex(intervalNames);
                if (selectionIndex != null) return selectionIndex;


                // Create a brand new selection index.
                List<DataSetIntervalIndex> intervalIdxs = groupIndex.getIntervalIndexes(intervalNames);
                if (intervalIdxs.isEmpty()) {

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            }
            return dataSet;
        }


        private DataSet _buildDataSet(InternalContext context, DataSetGroup op) {
            DataSetGroupIndex index = context.lastGroupIndex;
            DataSet dataSet = context.dataSet;


            ColumnGroup columnGroup = op.getColumnGroup();
            List<GroupFunction> groupFunctions = op.getGroupFunctions();


            // Data set header.
            DataSet result = DataSetFactory.newDataSet();
            result.addColumn(columnGroup.getColumnId(), ColumnType.LABEL);
            for (GroupFunction groupFunction : op.getGroupFunctions()) {
                result.addColumn(groupFunction.getColumnId(), ColumnType.NUMBER);
            }
            // Add the aggregate calculations to the result.
            List<DataSetIntervalIndex> intervalIdxs = index.getIntervalIndexes();
            for (int i=0; i<intervalIdxs.size(); i++) {
                DataSetIntervalIndex intervalIdx = intervalIdxs.get(i);
                result.setValueAt(i, 0, intervalIdx.getName());


                // Add the aggregate calculations.

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Related Classes of org.dashbuilder.dataset.engine.index.DataSetGroupIndex

org.dashbuilder.dataset.engine.SharedDataSetOpEngine$DataSetOpListProcessor

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