Examples with StatFunction org.activityinfo.model.formula.functions.StatFunction used on opensource projects

Example 1 with StatFunction

use of org.activityinfo.model.formula.functions.StatFunction in project activityinfo by bedatadriven.

the class NodeMatch method forId.

public static NodeMatch forId(FormTree.Node parent, FormClass formClass) {
    List<List<FormTree.Node>> partitions = partitionOnJoins(parent);
    List<FormTree.Node> leaf = partitions.get(partitions.size() - 1);
    // Embedded records are not independent resources, and so
    // do not have their own ID. So the leaf field MUST be a reference field
    Preconditions.checkArgument(leaf.get(0).isReference());
    NodeMatch match = new NodeMatch();
    match.joins = joinsTo(partitions, Optional.<StatFunction>absent());
    match.joins.add(new JoinNode(JoinType.REFERENCE, leaf.get(0).getDefiningFormClass().getId(), toExpr(leaf), formClass.getId()));
    match.formClass = formClass;
    match.type = Type.ID;
    return match;
}

Example 2 with StatFunction

use of org.activityinfo.model.formula.functions.StatFunction in project activityinfo by bedatadriven.

the class NodeMatch method joinsTo.

private static List<JoinNode> joinsTo(List<List<FormTree.Node>> partitions, Optional<StatFunction> aggregation) {
    /*
         *  Given a parent: "Site.Location.Territoire.District"
         *  This is represented as a tree of nodes:
         *      District -> Territoire -> Location -> Site
         *      
         *  We want to turn into a list of joins: 
         *      (site field -> form site), 
         *      (location field -> form school),
         *      (field territoire -> form Territoire)
         *      (field district -> form District)
         */
    LinkedList<JoinNode> joins = new LinkedList<>();
    for (int i = 0; i < partitions.size() - 1; i++) {
        // Reference field that functions as a foreign key
        List<FormTree.Node> left = partitions.get(i);
        FormField leftField = left.get(0).getField();
        ResourceId leftFormId = left.get(0).getDefiningFormClass().getId();
        FormulaNode leftFieldExpr = toExpr(left);
        // "RIGHT" side
        // Joining fom left to right using resource ids (primary key)
        List<FormTree.Node> right = partitions.get(i + 1);
        ResourceId rightFormId = right.get(0).getDefiningFormClass().getId();
        if (leftField.getType() instanceof ReferenceType) {
            // Join based on the (left) foreign key ==> (right) primary key
            joins.add(new JoinNode(JoinType.REFERENCE, leftFormId, leftFieldExpr, rightFormId, Optional.<StatFunction>absent()));
        } else if (leftField.getType() instanceof SubFormReferenceType) {
            joins.add(new JoinNode(JoinType.SUBFORM, leftFormId, new SymbolNode(ColumnModel.ID_SYMBOL), rightFormId, aggregation));
        } else {
            throw new IllegalStateException("Invalid field for joining: " + leftField.getType());
        }
    }
    return joins;
}