Examples with PreOrderNavigator org.teiid.query.sql.navigator.PreOrderNavigator used on opensource projects

Example 1 with PreOrderNavigator

use of org.teiid.query.sql.navigator.PreOrderNavigator in project teiid by teiid.

the class Validator method executeValidation.

private static final void executeValidation(LanguageObject object, final QueryMetadataInterface metadata, final AbstractValidationVisitor visitor) throws TeiidComponentException {
    // Reset visitor
    visitor.reset();
    visitor.setMetadata(metadata);
    setTempMetadata(metadata, visitor, object);
    PreOrderNavigator nav = new PreOrderNavigator(visitor) {

        protected void visitNode(LanguageObject obj) {
            QueryMetadataInterface previous = visitor.getMetadata();
            setTempMetadata(metadata, visitor, obj);
            super.visitNode(obj);
            visitor.setMetadata(previous);
        }

        @Override
        protected void preVisitVisitor(LanguageObject obj) {
            super.preVisitVisitor(obj);
            visitor.stack.add(obj);
        }

        @Override
        protected void postVisitVisitor(LanguageObject obj) {
            visitor.stack.pop();
        }
    };
    object.acceptVisitor(nav);
    // If an error occurred, throw an exception
    TeiidComponentException e = visitor.getException();
    if (e != null) {
        throw e;
    }
}

Example 2 with PreOrderNavigator

use of org.teiid.query.sql.navigator.PreOrderNavigator in project teiid by teiid.

the class CommandCollectorVisitor method getCommands.

public static final List<Command> getCommands(Command command, boolean includeExpanded) {
    CommandCollectorVisitor visitor = new CommandCollectorVisitor();
    visitor.collectExpanded = includeExpanded;
    final boolean visitCommands = command instanceof SetQuery;
    PreOrderNavigator navigator = new PreOrderNavigator(visitor) {

        @Override
        protected void visitNode(LanguageObject obj) {
            if (!visitCommands && obj instanceof Command) {
                return;
            }
            super.visitNode(obj);
        }
    };
    command.acceptVisitor(navigator);
    return visitor.getCommands();
}