Examples with ExpressionState org.hisp.dhis.parser.expression.ExpressionState used on opensource projects

Example 1 with ExpressionState

use of org.hisp.dhis.parser.expression.ExpressionState in project dhis2-core by dhis2.

the class PeriodOffset method evaluate.

@Override
public Object evaluate(ExprContext ctx, CommonExpressionVisitor visitor) {
    ExpressionState state = visitor.getState();
    int existingPeriodOffset = (state.getQueryMods() == null) ? 0 : state.getQueryMods().getPeriodOffset();
    int parsedPeriodOffset = (ctx.period == null) ? 0 : firstNonNull(parseInt(ctx.period.getText()), 0);
    int periodOffset = existingPeriodOffset + parsedPeriodOffset;
    QueryModifiers queryMods = state.getQueryModsBuilder().periodOffset(periodOffset).build();
    return visitor.visitWithQueryMods(ctx.expr(0), queryMods);
}

Example 2 with ExpressionState

use of org.hisp.dhis.parser.expression.ExpressionState in project dhis2-core by dhis2.

the class RepeatableProgramStageOffset method next.

private Object next(ExpressionParser.ExprContext ctx, CommonExpressionVisitor visitor) {
    ExpressionState state = visitor.getState();
    int oldStageOffset = state.getStageOffset();
    state.setStageOffset(Integer.parseInt(ctx.stage.getText()));
    Object ret = visitor.visit(ctx.expr(0));
    state.setStageOffset(oldStageOffset);
    return ret;
}

Example 3 with ExpressionState

use of org.hisp.dhis.parser.expression.ExpressionState in project dhis2-core by dhis2.

the class VectorFunction method visitSampledPeriods.

/**
 * Visits each of the sample periods and compiles a list of the double
 * values produced.
 */
private List<Double> visitSampledPeriods(ExprContext ctx, CommonExpressionVisitor visitor) {
    ExpressionParams params = visitor.getParams();
    ExpressionState state = visitor.getState();
    List<Double> values = new ArrayList<>();
    for (Period p : params.getSamplePeriods()) {
        state.setItemsFound(0);
        state.setItemValuesFound(0);
        Map<DimensionalItemObject, Object> valueMap = firstNonNull(params.getPeriodValueMap().get(p), Collections.emptyMap());
        Double value = visitWithValueMap(ctx, visitor, valueMap);
        if ((params.getMissingValueStrategy() == SKIP_IF_ANY_VALUE_MISSING && state.getItemValuesFound() < state.getItemsFound()) || (params.getMissingValueStrategy() == SKIP_IF_ALL_VALUES_MISSING && state.getItemsFound() != 0 && state.getItemValuesFound() == 0)) {
            value = null;
        }
        if (value != null) {
            values.add(value);
        }
    }
    return values;
}

Example 4 with ExpressionState

use of org.hisp.dhis.parser.expression.ExpressionState in project dhis2-core by dhis2.

the class DefaultExpressionService method getExpressionValue.

// -------------------------------------------------------------------------
// Compute the value of the expression
// -------------------------------------------------------------------------
@Override
public Object getExpressionValue(ExpressionParams params) {
    if (isEmpty(params.getExpression())) {
        return null;
    }
    CommonExpressionVisitor visitor = newVisitor(ITEM_EVALUATE, params);
    Object value = visit(params.getExpression(), params.getDataType(), visitor, true);
    ExpressionState state = visitor.getState();
    int itemsFound = state.getItemsFound();
    int itemValuesFound = state.getItemValuesFound();
    if (state.isUnprotectedNullDateFound()) {
        return null;
    }
    switch(params.getMissingValueStrategy()) {
        case SKIP_IF_ANY_VALUE_MISSING:
            if (itemValuesFound < itemsFound) {
                return null;
            }
        case SKIP_IF_ALL_VALUES_MISSING:
            if (itemsFound != 0 && itemValuesFound == 0) {
                return null;
            }
        case NEVER_SKIP:
            if (value == null) {
                switch(params.getDataType()) {
                    case NUMERIC:
                        return 0d;
                    case BOOLEAN:
                        return FALSE;
                    case TEXT:
                        return "";
                }
            }
    }
    return value;
}

Example 5 with ExpressionState

use of org.hisp.dhis.parser.expression.ExpressionState in project dhis2-core by dhis2.

the class VectorFunction method getSampleValues.

/**
 * Gets a list of sample values to aggregate.
 * <p>
 * The missingValueStrategy is handled as follows: for each sample
 * expression inside the aggregation function, if there are any sample
 * values missing and the strategy is SKIP_IF_ANY_VALUE_MISSING, then that
 * sample is skipped. Also if all the values are missing and the strategy is
 * SKIP_IF_ALL_VALUES_MISSING, then that sample is skipped.
 * <p>
 * Finally, if there were any items in the sample expression, the count of
 * items in the main expression is incremented. And if there was at least
 * one sample value, the count of item values in the main expression is
 * incremented. This means that if the vector is empty, it counts as a
 * missing value in the main expression.
 */
private List<Double> getSampleValues(ExprContext ctx, CommonExpressionVisitor visitor) {
    ExpressionState state = visitor.getState();
    int savedItemsFound = state.getItemsFound();
    int savedItemValuesFound = state.getItemValuesFound();
    List<Double> values = visitSampledPeriods(ctx, visitor);
    if (state.getItemsFound() > 0) {
        savedItemsFound++;
        if (!values.isEmpty()) {
            savedItemValuesFound++;
        }
    }
    state.setItemsFound(savedItemsFound);
    state.setItemValuesFound(savedItemValuesFound);
    return values;
}