Examples with Pointer com.haulmont.cuba.core.sys.jpql.pointer.Pointer used on opensource projects

Example 1 with Pointer

use of com.haulmont.cuba.core.sys.jpql.pointer.Pointer in project cuba by cuba-platform.

the class HintProvider method hintFieldName.

private HintResponse hintFieldName(String lastWord, String input, int caretPosition, Set<InferredType> expectedTypes) throws RecognitionException {
    QueryTreeAnalyzer queryAnalyzer = new QueryTreeAnalyzer();
    try {
        queryAnalyzer.prepare(model, input, false);
    } catch (RecognitionException | JPA2RecognitionException e) {
        List<String> errorMessages = new ArrayList<>();
        errorMessages.add(e.getMessage());
        return new HintResponse("Query error", errorMessages);
    }
    List<ErrorRec> errorRecs = queryAnalyzer.getInvalidIdVarNodes();
    QueryVariableContext root = queryAnalyzer.getRootQueryVariableContext();
    if (root == null) {
        List<String> errorMessages = prepareErrorMessages(errorRecs);
        errorMessages.add(0, "Query variable context is null");
        return new HintResponse("Query error", errorMessages);
    }
    QueryVariableContext queryVC = root.getContextByCaretPosition(caretPosition);
    EntityPath path = EntityPath.parseEntityPath(lastWord);
    Pointer pointer = path.resolvePointer(model, queryVC);
    if (pointer instanceof NoPointer) {
        List<String> errorMessages = prepareErrorMessages(errorRecs);
        errorMessages.add(0, "Cannot parse [" + lastWord + "]");
        return new HintResponse("Query error", errorMessages);
    }
    if (pointer instanceof CollectionPointer) {
        List<String> errorMessages = prepareErrorMessages(errorRecs);
        errorMessages.add(0, "Cannot get attribute of collection [" + lastWord + "]");
        return new HintResponse("Query error", errorMessages);
    }
    if (!(pointer instanceof EntityPointer)) {
        List<String> errorMessages = prepareErrorMessages(errorRecs);
        return new HintResponse("Query error", errorMessages);
    }
    List<Option> options = new ArrayList<>();
    JpqlEntityModel targetEntity = ((EntityPointer) pointer).getEntity();
    if (targetEntity instanceof NoJpqlEntityModel)
        return new HintResponse(options, path.lastEntityFieldPattern);
    List<Attribute> attributes = targetEntity.findAttributesStartingWith(path.lastEntityFieldPattern, expectedTypes);
    for (Attribute attribute : attributes) {
        options.add(new Option(attribute.getName(), attribute.getUserFriendlyName()));
    }
    return new HintResponse(options, path.lastEntityFieldPattern);
}

Example 2 with Pointer

use of com.haulmont.cuba.core.sys.jpql.pointer.Pointer in project cuba by cuba-platform.

the class EntitiesFinder method resolveEntityNames.

protected void resolveEntityNames(Set<String> entityNames, PathNode node, DomainModel model, QueryVariableContext queryVariableContext) {
    List<Pointer> pointers = node.resolveTransitionalPointers(model, queryVariableContext);
    pointers.stream().filter(pointer -> pointer instanceof HasEntityPointer).forEach(pointer -> {
        JpqlEntityModel entityModel = ((HasEntityPointer) pointer).getEntity();
        if (entityModel != null) {
            entityNames.add(entityModel.getName());
        }
    });
}

Example 3 with Pointer

use of com.haulmont.cuba.core.sys.jpql.pointer.Pointer in project cuba by cuba-platform.

the class IdentificationVariableNode method deductFields.

public void deductFields(QueryVariableContext queryVC, CommonTree node, DomainModel model) {
    List children = node.getChildren();
    CommonTree T_SELECTED_ITEMS_NODE = (CommonTree) children.get(0);
    for (Object o : T_SELECTED_ITEMS_NODE.getChildren()) {
        o = ((SelectedItemNode) o).getChild(0);
        if (!(o instanceof PathNode)) {
            throw new RuntimeException("Not a path node");
        }
        PathNode pathNode = (PathNode) o;
        Pointer pointer = pathNode.resolvePointer(model, queryVC);
        if (pointer instanceof NoPointer) {
            queryVC.setEntity(NoJpqlEntityModel.getInstance());
            return;
        }
        if (pointer instanceof SimpleAttributePointer) {
            SimpleAttributePointer saPointer = (SimpleAttributePointer) pointer;
            queryVC.getEntity().addAttributeCopy(saPointer.getAttribute());
        } else if (pointer instanceof EntityPointer) {
            if (T_SELECTED_ITEMS_NODE.getChildren().size() != 1) {
                // todo implement
                throw new UnsupportedOperationException("Unimplemented variant with returned array");
            } else {
                queryVC.setEntity(((EntityPointer) pointer).getEntity());
            }
        }
    }
}

Example 4 with Pointer

use of com.haulmont.cuba.core.sys.jpql.pointer.Pointer in project cuba by cuba-platform.

the class EntityPath method resolveTransitionalPointers.

public List<Pointer> resolveTransitionalPointers(DomainModel model, QueryVariableContext queryVC) {
    List<Pointer> pointers = new ArrayList<>();
    Pointer pointer = EntityPointer.create(queryVC, topEntityVariableName);
    pointers.add(pointer);
    for (String traversedField : traversedFields) {
        pointer = pointer.next(model, traversedField);
        pointers.add(pointer);
    }
    return pointers;
}