Examples with IConstraintElement org.eclipse.xtext.serializer.analysis.IGrammarConstraintProvider.IConstraintElement used on opensource projects

Example 1 with IConstraintElement

use of org.eclipse.xtext.serializer.analysis.IGrammarConstraintProvider.IConstraintElement in project xtext-core by eclipse.

the class PartialSerializer method trySerializeSingleValue.

protected List<SerializationStrategy> trySerializeSingleValue(EObject owner, FeatureChange change, IEObjectRegion ownerRegion, IConstraint constraint) {
    List<SerializationStrategy> result = Lists.newArrayList();
    EStructuralFeature feature = change.getFeature();
    IFeatureInfo featureInfo = constraint.getFeatures()[owner.eClass().getFeatureID(feature)];
    List<IConstraintElement> assignments = featureInfo.getAssignments();
    if (assignments.size() != 1) {
        return null;
    }
    boolean optional = assignments.get(0).isOptional();
    IAstRegion featureRegion = findRegion(ownerRegion, change);
    ValueTransient valueTransient = transientValues.isValueTransient(owner, feature);
    switch(valueTransient) {
        case YES:
            if (featureRegion != null) {
                if (optional) {
                    result.add(new DeleteRegionStrategy(featureRegion));
                } else {
                    return null;
                }
            }
            break;
        case PREFERABLY:
            if (featureRegion != null) {
                if (optional) {
                    result.add(new DeleteRegionStrategy(featureRegion));
                } else {
                    SerializationStrategy update = updateSingleValue(owner, feature, featureRegion);
                    if (update != null) {
                        result.add(update);
                    } else {
                        return null;
                    }
                }
            }
            break;
        case NO:
            if (featureRegion == null) {
                return null;
            }
            SerializationStrategy update = updateSingleValue(owner, feature, featureRegion);
            if (update != null) {
                result.add(update);
            } else {
                return null;
            }
            break;
    }
    return result;
}

Example 2 with IConstraintElement

use of org.eclipse.xtext.serializer.analysis.IGrammarConstraintProvider.IConstraintElement in project xtext-core by eclipse.

the class PartialSerializer method trySerializeMultiValue.

protected List<SerializationStrategy> trySerializeMultiValue(EObject owner, FeatureChange change, IEObjectRegion ownerRegion, IConstraint constraint) {
    EStructuralFeature feature = change.getFeature();
    List<SerializationStrategy> result = Lists.newArrayList();
    IFeatureInfo featureInfo = constraint.getFeatures()[owner.eClass().getFeatureID(feature)];
    List<IConstraintElement> assignments = featureInfo.getAssignments();
    if (assignments.size() != 1) {
        return null;
    }
    IConstraintElement assignment = assignments.get(0);
    if (!assignment.isMany()) {
        return null;
    }
    List<IAstRegion> originals = findRegions(ownerRegion, change);
    EList<ListChange> listChanges = change.getListChanges();
    if (listChanges.isEmpty() && originals.isEmpty()) {
        ISerializationContext ctx = getSerializationContext(owner);
        AbstractElement ins = assignment.getGrammarElement();
        IHiddenRegion insertAt = insertionPointFinder.findInsertionPoint(ctx, ownerRegion, ins);
        if (insertAt == null) {
            return null;
        }
        for (Object value : (List<?>) owner.eGet(feature)) {
            EObject obj = (EObject) value;
            ISerializationContext context = getSerializationContext(obj);
            result.add(new SerializeRecursiveStrategy(insertAt, obj, context));
        }
        return result;
    }
    // ListTransient listTransient = transientValues.isListTransient(owner, feature);
    List<Object> modifying = Lists.newArrayList(((List<?>) owner.eGet(feature)));
    for (ListChange lc : listChanges) {
        ChangeKind kind = lc.getKind();
        if (kind == ADD_LITERAL) {
            IAstRegion region = originals.get(lc.getIndex());
            result.add(new DeleteRegionStrategy(region));
        } else if (kind == MOVE_LITERAL || kind == REMOVE_LITERAL) {
            if (originals.isEmpty()) {
                return null;
            }
            int index = lc.getIndex();
            IHiddenRegion insertAt;
            if (index >= originals.size()) {
                insertAt = ((ISequentialRegion) originals.get(originals.size() - 1)).getNextHiddenRegion();
            } else {
                insertAt = ((ISequentialRegion) originals.get(index)).getPreviousHiddenRegion();
            }
            EObject value = (EObject) modifying.get(index);
            modifying.remove(index);
            if (kind == REMOVE_LITERAL) {
                ISerializationContext context = getSerializationContext(value);
                result.add(new SerializeRecursiveStrategy(insertAt, value, context));
            } else if (kind == ChangeKind.MOVE_LITERAL) {
                int moveToIndex = lc.getMoveToIndex();
                IAstRegion source = originals.get(moveToIndex);
                result.add(new DeleteRegionStrategy(source));
                result.add(new InsertRegionStrategy(insertAt, source));
            }
        }
    }
    return result;
}

Example 3 with IConstraintElement

use of org.eclipse.xtext.serializer.analysis.IGrammarConstraintProvider.IConstraintElement in project xtext-core by eclipse.

the class ContextFinder method collectAssignments.

protected Multimap<AbstractElement, ISerializationContext> collectAssignments(Multimap<IConstraint, ISerializationContext> constraints, EStructuralFeature feature) {
    Multimap<AbstractElement, ISerializationContext> result = ArrayListMultimap.create();
    for (Entry<IConstraint, Collection<ISerializationContext>> e : constraints.asMap().entrySet()) {
        IConstraint constraint = e.getKey();
        Collection<ISerializationContext> contexts = e.getValue();
        IFeatureInfo featureInfo = constraint.getFeatures()[constraint.getType().getFeatureID(feature)];
        List<IConstraintElement> assignments = featureInfo.getAssignments();
        for (IConstraintElement assignment : assignments) {
            result.putAll(assignment.getGrammarElement(), contexts);
        }
    }
    return result;
}