QLViewFactory.java

package org.nlamah.QL.Builders;

import java.util.ArrayList;
import java.util.List;

import org.nlamah.QL.Interfaces.QLFormElementViewControllerVisitor;
import org.nlamah.QL.View.Controllers.ConditionalBlockViewController;
import org.nlamah.QL.View.Controllers.ElseIfThenBlockViewController;
import org.nlamah.QL.View.Controllers.ElseThenBlockViewController;
import org.nlamah.QL.View.Controllers.FormRootViewController;
import org.nlamah.QL.View.Controllers.IfThenBlockViewController;
import org.nlamah.QL.View.Controllers.QuestionViewController;
import org.nlamah.QL.View.Controllers.Abstract.DeclaringFormElementViewController;
import org.nlamah.QL.View.Controllers.Abstract.FormElementViewController;
import org.nlamah.QL.View.Form.ElseIfThenBlockView;
import org.nlamah.QL.View.Form.ElseThenBlockView;
import org.nlamah.QL.View.Form.IfThenBlockView;
import org.nlamah.QL.View.Form.Abstract.FormElementView;

public class QLViewFactory implements QLFormElementViewControllerVisitor 
{
	protected FormElementView currentlyCreatedView;

	public List<FormElementView> gatherChildViews(DeclaringFormElementViewController declaringFormElementViewController)
	{
		List<FormElementViewController> childViewControllers = declaringFormElementViewController.childViewControllers();
		List<FormElementView> childViews = new ArrayList<FormElementView>();

		for (FormElementViewController childViewController : childViewControllers)
		{
			childViewController.accept(this);

			childViews.add(currentlyCreatedView);
		}

		return childViews;
	}

	public FormElementView gatherViewForFormViewController(FormElementViewController formViewController)
	{
		formViewController.accept(this);

		return currentlyCreatedView;
	}

	private void gatherAndAddChildViews(DeclaringFormElementViewController viewController)
	{
		FormElementView view = viewController.view();

		viewController.setChildViews(gatherChildViews(viewController));

		for (FormElementView childView : viewController.childViews())
		{
			view.add(childView);
		}

		currentlyCreatedView = view;
	}

	private ConditionalBlockViewController addIfThenBlockView (ConditionalBlockViewController conditionalBlockViewController)
	{
		FormElementView conditionalBlockView = conditionalBlockViewController.view();

		IfThenBlockViewController ifThenBlockViewController = conditionalBlockViewController.ifThenBlockViewController();

		ifThenBlockViewController.accept(this);

		conditionalBlockViewController.setIfThenBlockView((IfThenBlockView) currentlyCreatedView);	
		conditionalBlockView.add(currentlyCreatedView);


		return conditionalBlockViewController;
	}

	private ConditionalBlockViewController addElseIfThenBlockViews(ConditionalBlockViewController conditionalBlockViewController)
	{
		FormElementView conditionalBlockView = conditionalBlockViewController.view();

		assert(conditionalBlockView != null);

		List<ElseIfThenBlockViewController> elseIfThenBlockViewControllers = conditionalBlockViewController.elseIfThenBlockViewControllers();
		List<ElseIfThenBlockView> elseIfThenBlockViews = new ArrayList<ElseIfThenBlockView>();

		for (ElseIfThenBlockViewController elseIfThenBlockViewController : elseIfThenBlockViewControllers)
		{
			elseIfThenBlockViewController.accept(this);

			elseIfThenBlockViews.add((ElseIfThenBlockView) currentlyCreatedView);

			conditionalBlockView.add(currentlyCreatedView);
		}

		conditionalBlockViewController.setElseIfThenBlockViews(elseIfThenBlockViews);

		return conditionalBlockViewController;
	}

	private ConditionalBlockViewController addElseThenBlockView(ConditionalBlockViewController conditionalBlockViewController)
	{
		FormElementView conditionalBlockView = conditionalBlockViewController.view();

		ElseThenBlockViewController elseThenBlockViewController = conditionalBlockViewController.elseThenBlockViewController();

		if (elseThenBlockViewController != null)
		{
			elseThenBlockViewController.accept(this);

			conditionalBlockViewController.setElseThenBlockView((ElseThenBlockView) currentlyCreatedView);
			conditionalBlockView.add(currentlyCreatedView);
		}

		return conditionalBlockViewController;
	}

	@Override
	public void visit(FormRootViewController FormRootViewController) 
	{
		assert(false);
	}

	@Override
	public void visit(ElseIfThenBlockViewController elseIfThenBlockViewController) 
	{
		gatherAndAddChildViews(elseIfThenBlockViewController);
	}

	@Override
	public void visit(ElseThenBlockViewController elseThenBlockViewController) 
	{	
		gatherAndAddChildViews(elseThenBlockViewController);
	}

	@Override
	public void visit(IfThenBlockViewController ifThenBlockViewController) 
	{	
		gatherAndAddChildViews(ifThenBlockViewController);
	}

	@Override
	public void visit(ConditionalBlockViewController conditionalBlockViewController) 
	{	
		conditionalBlockViewController = addIfThenBlockView(conditionalBlockViewController);

		conditionalBlockViewController = addElseIfThenBlockViews(conditionalBlockViewController);

		conditionalBlockViewController = addElseThenBlockView(conditionalBlockViewController);

		currentlyCreatedView = conditionalBlockViewController.view();
	}

	@Override
	public void visit(QuestionViewController questionViewController)
	{
		currentlyCreatedView = questionViewController.view();
	}
}