Examples with EvaluationContext org.javarosa.core.model.condition.EvaluationContext used on opensource projects

Example 16 with EvaluationContext

use of org.javarosa.core.model.condition.EvaluationContext in project javarosa by opendatakit.

the class FormInstanceParser method verifyControlBindings.

private void verifyControlBindings(IFormElement fe, FormInstance instance, List<String> errors) {
    // throws XmlPullParserException {
    if (fe.getChildren() == null)
        return;
    for (int i = 0; i < fe.getChildren().size(); i++) {
        IFormElement child = fe.getChildren().get(i);
        IDataReference ref = null;
        String type = null;
        if (child instanceof GroupDef) {
            ref = child.getBind();
            type = (((GroupDef) child).getRepeat() ? "Repeat" : "Group");
        } else if (child instanceof QuestionDef) {
            ref = child.getBind();
            type = "Question";
        }
        TreeReference tref = FormInstance.unpackReference(ref);
        if (child instanceof QuestionDef && tref.size() == 0) {
            // group can bind to '/'; repeat can't, but that's checked above
            reporter.warning(XFormParserReporter.TYPE_INVALID_STRUCTURE, "Cannot bind control to '/'", null);
        } else {
            List<TreeReference> nodes = new EvaluationContext(instance).expandReference(tref, true);
            if (nodes.size() == 0) {
                String error = type + " bound to non-existent node: [" + tref.toString() + "]";
                reporter.error(error);
                errors.add(error);
            }
        // we can't check whether questions map to the right kind of node ('data' node vs. 'sub-tree' node) as that depends
        // on the question's data type, which we don't know yet
        }
        verifyControlBindings(child, instance, errors);
    }
}

Example 17 with EvaluationContext

use of org.javarosa.core.model.condition.EvaluationContext in project javarosa by opendatakit.

the class FormInstanceParser method applyInstanceProperties.

private void applyInstanceProperties(FormInstance instance) {
    for (DataBinding bind : bindings) {
        final TreeReference ref = FormInstance.unpackReference(bind.getReference());
        final List<TreeReference> nodes = new EvaluationContext(instance).expandReference(ref, true);
        if (nodes.size() > 0) {
            attachBindGeneral(bind);
        }
        for (TreeReference nref : nodes) {
            attachBind(instance.resolveReference(nref), bind);
        }
    }
    applyControlProperties(instance);
}

Example 18 with EvaluationContext

use of org.javarosa.core.model.condition.EvaluationContext in project javarosa by opendatakit.

the class XPathFuncExpr method indexedRepeat.

/**
 * This provides a method of indexing fields stored in prior repeat groups.
 *
 * args[0] = generic XPath expression to index
 * args[1] = generic XPath expression for group to index
 * args[2] = index number for group
 * args[3] = generic XPath expression for add'l group to index (if 5 or 7 parameters passed)
 * args[4] = index number for group (if 5 or 7 parameters passed)
 * args[5] = generic XPath expression for add'l group to index (if 7 parameters passed)
 * args[6] = index number for group (if 7 parameters passed)
 *
 * @param model
 * @param ec
 * @param args
 * @param argVals
 * @return
 */
public static Object indexedRepeat(DataInstance model, EvaluationContext ec, XPathExpression[] args, Object[] argVals) throws XPathTypeMismatchException {
    // initialize target and context references
    if (!(args[0] instanceof XPathPathExpr)) {
        throw new XPathTypeMismatchException("indexed-repeat(): first parameter must be XPath field reference");
    }
    XPathPathExpr targetPath = (XPathPathExpr) args[0];
    TreeReference targetRef = targetPath.getReference();
    TreeReference contextRef = targetRef.clone();
    // process passed index(es)
    for (int pathargi = 1, idxargi = 2; idxargi < args.length; pathargi += 2, idxargi += 2) {
        // confirm that we were passed an XPath
        if (!(args[pathargi] instanceof XPathPathExpr)) {
            throw new XPathTypeMismatchException("indexed-repeat(): parameter " + (pathargi + 1) + " must be XPath repeat-group reference");
        }
        // confirm that the passed XPath is a parent of our overall target path
        TreeReference groupRef = ((XPathPathExpr) args[pathargi]).getReference();
        if (!groupRef.isParentOf(targetRef, true)) {
            throw new XPathTypeMismatchException("indexed-repeat(): parameter " + (pathargi + 1) + " must be a parent of the field in parameter 1");
        }
        // process index (if valid)
        int groupIdx = toInt(args[idxargi].eval(model, ec)).intValue();
        if (groupIdx <= 0) {
            /*
                   Don't allow invalid index otherwise an exception will be thrown later by XPathNodeset#unpack().
                   This may happen if referenced node hadn't gotten a value yet but the calculation was fired. For example when adding a new repeat.
                 */
            groupIdx = 1;
        }
        contextRef.setMultiplicity(groupRef.size() - 1, groupIdx - 1);
    }
    // evaluate and return the XPath expression, in context
    EvaluationContext revisedec = new EvaluationContext(ec, contextRef);
    return (targetPath.eval(model, revisedec));
}

Example 19 with EvaluationContext

use of org.javarosa.core.model.condition.EvaluationContext in project javarosa by opendatakit.

the class FormEntryPrompt method getAnswerValue.

// note: code overlap with FormDef.copyItemsetAnswer
public IAnswerData getAnswerValue() {
    QuestionDef q = getQuestion();
    ItemsetBinding itemset = q.getDynamicChoices();
    if (itemset != null) {
        if (itemset.valueRef != null) {
            List<SelectChoice> choices = getSelectChoices();
            List<String> preselectedValues = new ArrayList<String>();
            // determine which selections are already present in the answer
            if (itemset.copyMode) {
                TreeReference destRef = itemset.getDestRef().contextualize(mTreeElement.getRef());
                List<TreeReference> subNodes = form.getEvaluationContext().expandReference(destRef);
                for (int i = 0; i < subNodes.size(); i++) {
                    TreeElement node = form.getMainInstance().resolveReference(subNodes.get(i));
                    String value = itemset.getRelativeValue().evalReadable(form.getMainInstance(), new EvaluationContext(form.getEvaluationContext(), node.getRef()));
                    preselectedValues.add(value);
                }
            } else {
                List<Selection> sels;
                IAnswerData data = mTreeElement.getValue();
                if (data instanceof SelectMultiData) {
                    sels = (List<Selection>) data.getValue();
                } else if (data instanceof SelectOneData) {
                    sels = new ArrayList<Selection>(1);
                    sels.add((Selection) data.getValue());
                } else {
                    sels = new ArrayList<Selection>(0);
                }
                for (int i = 0; i < sels.size(); i++) {
                    preselectedValues.add(sels.get(i).xmlValue);
                }
            }
            // populate 'selection' with the corresponding choices (matching 'value') from the dynamic choiceset
            List<Selection> selection = new ArrayList<Selection>();
            for (int i = 0; i < preselectedValues.size(); i++) {
                String value = preselectedValues.get(i);
                SelectChoice choice = null;
                for (int j = 0; j < choices.size(); j++) {
                    SelectChoice ch = choices.get(j);
                    if (value.equals(ch.getValue())) {
                        choice = ch;
                        break;
                    }
                }
                // will no longer be an option this go around
                if (choice != null) {
                    selection.add(choice.selection());
                }
            }
            // convert to IAnswerData
            if (selection.size() == 0) {
                return null;
            } else if (q.getControlType() == Constants.CONTROL_SELECT_MULTI) {
                return new SelectMultiData(selection);
            } else if (q.getControlType() == Constants.CONTROL_SELECT_ONE) {
                // do something if more than one selected?
                return new SelectOneData(selection.get(0));
            } else {
                throw new RuntimeException("can't happen");
            }
        } else {
            // cannot map up selections without <value>
            return null;
        }
    } else {
        // static choices
        return mTreeElement.getValue();
    }
}

Example 20 with EvaluationContext

use of org.javarosa.core.model.condition.EvaluationContext in project javarosa by opendatakit.

the class FormEntryPrompt method getConstraintText.

public String getConstraintText(String textForm, IAnswerData attemptedValue) {
    if (mTreeElement.getConstraint() == null) {
        return null;
    } else {
        EvaluationContext ec = new EvaluationContext(form.getEvaluationContext(), mTreeElement.getRef());
        if (textForm != null) {
            ec.setOutputTextForm(textForm);
        }
        if (attemptedValue != null) {
            ec.isConstraint = true;
            ec.candidateValue = attemptedValue;
        }
        String constraintMessage = mTreeElement.getConstraint().getConstraintMessage(ec, form.getMainInstance(), textForm);
        return substituteStringArgs(constraintMessage);
    }
}