Java 类javax.lang.model.util.SimpleTypeVisitor7 实例源码

@Override
public void process(Element element) throws Exception {
    final Element enclosingElement = element.getEnclosingElement();
    if (enclosingElement.getAnnotation(Entry.class) == null) {
        throw new ElementException("Class containing @Relation must be annotated with @Entry", enclosingElement);
    }
    element.asType().accept(new SimpleTypeVisitor7<Void, Void>() {
        @Override
        public Void visitDeclared(DeclaredType t, Void unused) {
            final List<? extends TypeMirror> args = t.getTypeArguments();
            if (args.isEmpty()) {
                processOneToOne(element, t.asElement());
            } else {
                processOneToMany(element, (TypeElement) t.asElement(), args.get(0));
            }
            return super.visitDeclared(t, unused);
        }
    }, null);
}

private void processOneToMany(Element field, Element collectionType, TypeMirror relation) {
    if (!mTypeUtils.isAssignable(collectionType.asType(), List.class)) {
        throw new ElementException("Relation type must be subclass of List<E>", field);
    }
    relation.accept(new SimpleTypeVisitor7<Void, Void>() {
        @Override
        public Void visitDeclared(DeclaredType t, Void unused) {
            final Element element = t.asElement();
            if (element.getAnnotation(Entry.class) == null) {
                throw new ElementException("Related type must be annotated with @Entry", element);
            }
            final Element enclosingElement = field.getEnclosingElement();
            final TableSpec lTable = mCompileGraph.findTableSpec(enclosingElement);
            final TableSpec rTable = mCompileGraph.findTableSpec(element);
            final ClassName className = makeClassName(field);
            final RelationSpec relationSpec = new RelationSpec(
                    field, className, lTable, rTable, true);
            mCompileGraph.putRelationSpec(enclosingElement, relationSpec);
            return super.visitDeclared(t, unused);
        }
    }, null);
}

public TypeName forTypeMirror(TypeMirror mirror) {
    return mirror.accept(new SimpleTypeVisitor7<TypeName, Void>(){

    }, null);
}