Examples with Children com.oracle.truffle.api.nodes.Node.Children used on opensource projects

Example 1 with Children

use of com.oracle.truffle.api.nodes.Node.Children in project graal by oracle.

the class NodeParser method parseChildren.

private List<NodeChildData> parseChildren(NodeData node, final List<TypeElement> typeHierarchy, List<? extends Element> elements) {
    Map<String, TypeMirror> castNodeTypes = new HashMap<>();
    for (ExecutableElement method : ElementFilter.methodsIn(elements)) {
        AnnotationMirror mirror = ElementUtils.findAnnotationMirror(processingEnv, method, CreateCast.class);
        if (mirror != null) {
            List<String> children = (ElementUtils.getAnnotationValueList(String.class, mirror, "value"));
            if (children != null) {
                for (String child : children) {
                    castNodeTypes.put(child, method.getReturnType());
                }
            }
        }
    }
    List<NodeChildData> executedFieldChildren = new ArrayList<>();
    for (VariableElement field : ElementFilter.fieldsIn(elements)) {
        if (field.getModifiers().contains(Modifier.STATIC)) {
            continue;
        }
        AnnotationMirror executed = ElementUtils.findAnnotationMirror(field.getAnnotationMirrors(), context.getDeclaredType(Executed.class));
        if (executed != null) {
            TypeMirror type = field.asType();
            String name = field.getSimpleName().toString();
            Cardinality cardinality = Cardinality.ONE;
            if (type.getKind() == TypeKind.ARRAY) {
                cardinality = Cardinality.MANY;
            }
            AnnotationValue executedWith = ElementUtils.getAnnotationValue(executed, "with");
            NodeChildData child = new NodeChildData(field, executed, name, type, type, field, cardinality, executedWith);
            executedFieldChildren.add(child);
            if (field.getModifiers().contains(Modifier.PRIVATE)) {
                child.addError("Field annotated with @%s must be visible for the generated subclass to execute.", Executed.class.getSimpleName());
            }
            if (cardinality == Cardinality.ONE) {
                if (field.getAnnotation(Child.class) == null) {
                    child.addError("Field annotated with @%s must also be annotated with @%s.", Executed.class.getSimpleName(), Child.class.getSimpleName());
                }
            } else {
                assert cardinality == Cardinality.MANY;
                if (field.getAnnotation(Children.class) == null) {
                    child.addError("Field annotated with @%s must also be annotated with @%s.", Executed.class.getSimpleName(), Children.class.getSimpleName());
                }
            }
        }
    }
    NodeChildData many = null;
    Set<String> names = new HashSet<>();
    for (NodeChildData child : executedFieldChildren) {
        if (child.needsGeneratedField()) {
            throw new AssertionError("Should not need generated field.");
        }
        if (names.contains(child.getName())) {
            child.addError("Field annotated with @%s has duplicate name '%s'. " + "Executed children must have unique names.", Executed.class.getSimpleName(), child.getName());
        } else if (many != null) {
            child.addError("Field annotated with @%s is hidden by executed field '%s'. " + "Executed child fields with multiple children hide all following executed child declarations. " + "Reorder or remove this executed child declaration.", Executed.class.getSimpleName(), many.getName());
        } else if (child.getCardinality().isMany()) {
            many = child;
        }
        names.add(child.getName());
    }
    List<NodeChildData> nodeChildren = new ArrayList<>();
    List<TypeElement> typeHierarchyReversed = new ArrayList<>(typeHierarchy);
    Collections.reverse(typeHierarchyReversed);
    for (TypeElement type : typeHierarchyReversed) {
        AnnotationMirror nodeChildrenMirror = ElementUtils.findAnnotationMirror(processingEnv, type, NodeChildren.class);
        TypeMirror nodeClassType = type.getSuperclass();
        if (!ElementUtils.isAssignable(nodeClassType, context.getTruffleTypes().getNode())) {
            nodeClassType = null;
        }
        List<AnnotationMirror> children = ElementUtils.collectAnnotations(context, nodeChildrenMirror, "value", type, NodeChild.class);
        int index = 0;
        for (AnnotationMirror childMirror : children) {
            String name = ElementUtils.getAnnotationValue(String.class, childMirror, "value");
            if (name.equals("")) {
                name = "child" + index;
            }
            Cardinality cardinality = Cardinality.ONE;
            TypeMirror childNodeType = inheritType(childMirror, "type", nodeClassType);
            if (childNodeType.getKind() == TypeKind.ARRAY) {
                cardinality = Cardinality.MANY;
            }
            TypeMirror originalChildType = childNodeType;
            TypeMirror castNodeType = castNodeTypes.get(name);
            if (castNodeType != null) {
                childNodeType = castNodeType;
            }
            Element getter = findGetter(elements, name, childNodeType);
            AnnotationValue executeWith = ElementUtils.getAnnotationValue(childMirror, "executeWith");
            NodeChildData nodeChild = new NodeChildData(type, childMirror, name, childNodeType, originalChildType, getter, cardinality, executeWith);
            nodeChildren.add(nodeChild);
            if (nodeChild.getNodeType() == null) {
                nodeChild.addError("No valid node type could be resoleved.");
            }
            if (nodeChild.hasErrors()) {
                continue;
            }
            index++;
        }
    }
    if (!nodeChildren.isEmpty() && !executedFieldChildren.isEmpty()) {
        node.addError("The use of @%s and @%s at the same time is not supported.", NodeChild.class.getSimpleName(), Executed.class.getSimpleName());
        return executedFieldChildren;
    } else if (!executedFieldChildren.isEmpty()) {
        return executedFieldChildren;
    } else {
        List<NodeChildData> filteredChildren = new ArrayList<>();
        Set<String> encounteredNames = new HashSet<>();
        for (int i = nodeChildren.size() - 1; i >= 0; i--) {
            NodeChildData child = nodeChildren.get(i);
            if (!encounteredNames.contains(child.getName())) {
                filteredChildren.add(0, child);
                encounteredNames.add(child.getName());
            }
        }
        return filteredChildren;
    }
}