QLViewControllersFactory.java

package org.nlamah.QL.Builders;

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

import org.nlamah.QBase.Tools.ArrayTools;
import org.nlamah.QL.Interfaces.QLFormElementVisitor;
import org.nlamah.QL.Model.Form.ComputedQuestion;
import org.nlamah.QL.Model.Form.ConditionalBlock;
import org.nlamah.QL.Model.Form.ElseIfThenBlock;
import org.nlamah.QL.Model.Form.ElseThenBlock;
import org.nlamah.QL.Model.Form.Form;
import org.nlamah.QL.Model.Form.IfThenBlock;
import org.nlamah.QL.Model.Form.InputQuestion;
import org.nlamah.QL.Model.Form.Abstract.DeclaringFormElement;
import org.nlamah.QL.Model.Form.Abstract.FormElement;
import org.nlamah.QL.View.Controllers.ComputedQuestionViewController;
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.Abstract.WidgetView;
import org.nlamah.QL.View.Widgets.CheckboxWidgetView;
import org.nlamah.QL.View.Widgets.ComputedValueWidgetView;
import org.nlamah.QL.View.Widgets.NumberFieldWidgetView;
import org.nlamah.QL.View.Widgets.TextFieldWidgetView;

public class QLViewControllersFactory implements QLFormElementVisitor
{	
	protected FormRootViewController rootViewController;
	protected FormElementViewController currentlyCreatedViewController;

	public QLViewControllersFactory(FormRootViewController rootViewController)
	{
		this.rootViewController = rootViewController;
	}

	public List<FormElementViewController> createChildViewControllers(DeclaringFormElement declaringFormElement)
	{
		List<FormElementViewController> childViewControllers = null;

		if (ArrayTools.arrayExistsAndHasElements(declaringFormElement.childElements()))
		{
			childViewControllers = new ArrayList<FormElementViewController>();

			for (FormElement formElement : declaringFormElement.childElements())
			{
				formElement.accept(this);

				childViewControllers.add(currentlyCreatedViewController);
			}
		}

		return childViewControllers;
	}

	public FormElementViewController createFormElementViewController(FormElement formElement)
	{
		formElement.accept(this);

		return currentlyCreatedViewController;
	}

	private void createAndAddChildViewControllers(DeclaringFormElementViewController viewController, DeclaringFormElement formElement)
	{
		viewController.setChildViewControllers(createChildViewControllers(formElement));

		currentlyCreatedViewController = viewController;

		currentlyCreatedViewController.setRootViewController(this.rootViewController);
	}

	private ConditionalBlockViewController createIfThenBlockViewController(ConditionalBlockViewController conditionalBlockViewController, IfThenBlock ifThenBlock)
	{
		IfThenBlockViewController ifThenBlockViewController = null;

		assert(ifThenBlock != null);

		ifThenBlockViewController = new IfThenBlockViewController(ifThenBlock);
		ifThenBlockViewController.setChildViewControllers(createChildViewControllers(ifThenBlock));

		conditionalBlockViewController.setIfThenBlockViewController(ifThenBlockViewController);

		return conditionalBlockViewController;
	}

	private ConditionalBlockViewController createElseIfThenBlockViewControllers(ConditionalBlockViewController conditionalBlockViewController, List<ElseIfThenBlock> elseIfThenBlocks)
	{
		List<ElseIfThenBlockViewController> elseIfThenBlockViewControllers = null;

		if (ArrayTools.arrayExistsAndHasElements(elseIfThenBlocks))
		{
			int numberOfElseIfThenViewControllers = elseIfThenBlocks.size();

			elseIfThenBlockViewControllers = new ArrayList<ElseIfThenBlockViewController>(numberOfElseIfThenViewControllers);

			for (ElseIfThenBlock elseIfThenBlock : elseIfThenBlocks)
			{
				ElseIfThenBlockViewController viewController = new ElseIfThenBlockViewController(elseIfThenBlock);

				viewController.setChildViewControllers(createChildViewControllers(elseIfThenBlock));

				elseIfThenBlockViewControllers.add(viewController);
			}
		}

		conditionalBlockViewController.setElseIfThenBlockViewControllers(elseIfThenBlockViewControllers);

		return conditionalBlockViewController;
	}

	private ConditionalBlockViewController createElseThenBlockViewController(ConditionalBlockViewController conditionalBlockViewController, ElseThenBlock elseThenBlock)
	{		
		ElseThenBlockViewController elseThenBlockViewController = null;

		if (elseThenBlock != null)
		{
			elseThenBlockViewController = new ElseThenBlockViewController(elseThenBlock);

			elseThenBlockViewController.setChildViewControllers(createChildViewControllers(elseThenBlock));
		}

		conditionalBlockViewController.setElseThenBlockViewController(elseThenBlockViewController);

		return conditionalBlockViewController;
	}

	@Override
	public void visit(ConditionalBlock conditionalBlock) 
	{
		ConditionalBlockViewController conditionalBlockViewController = ConditionalBlockViewControllerFactory.createConditionalBlockViewController(conditionalBlock);

		conditionalBlockViewController = createIfThenBlockViewController(conditionalBlockViewController, conditionalBlock.ifThenBlock());
		conditionalBlockViewController = createElseIfThenBlockViewControllers(conditionalBlockViewController, conditionalBlock.elseIfThenBlocks());
		conditionalBlockViewController = createElseThenBlockViewController(conditionalBlockViewController, conditionalBlock.elseThenBlock());

		currentlyCreatedViewController = conditionalBlockViewController;

		currentlyCreatedViewController.setRootViewController(this.rootViewController);
	}

	@Override
	public void visit(ElseIfThenBlock elseIfThenBlock) 
	{	
		DeclaringFormElementViewController declaringFormElementViewController = new ElseIfThenBlockViewController(elseIfThenBlock);

		createAndAddChildViewControllers(declaringFormElementViewController, elseIfThenBlock);
	}

	@Override
	public void visit(ElseThenBlock elseThenBlock) 
	{
		DeclaringFormElementViewController declaringFormElementViewController = new ElseThenBlockViewController(elseThenBlock);

		createAndAddChildViewControllers(declaringFormElementViewController, elseThenBlock);
	}

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

	@Override
	public void visit(IfThenBlock ifThenBlock) 
	{
		DeclaringFormElementViewController declaringFormElementViewController = new IfThenBlockViewController(ifThenBlock);

		createAndAddChildViewControllers(declaringFormElementViewController, ifThenBlock);
	}

	@Override
	public void visit(InputQuestion inputQuestion) 
	{
		QuestionViewController questionViewController = new QuestionViewController(rootViewController, inputQuestion);
		
		WidgetView widgetView = null;

		switch (inputQuestion.returnType())
		{
		case BOOLEAN:widgetView = new CheckboxWidgetView();
		break;
		case NUMBER: widgetView = new NumberFieldWidgetView();
		break;
		case TEXT: widgetView = new TextFieldWidgetView();
		break;
		default: assert(false);
		break;
		}

		widgetView.setWidgetViewDelegate(questionViewController);

		questionViewController.setWidgetView(widgetView);

		currentlyCreatedViewController = questionViewController;
	}

	@Override
	public void visit(ComputedQuestion computedQuestion) 
	{
		ComputedQuestionViewController questionViewController = new ComputedQuestionViewController(rootViewController, computedQuestion);

		ComputedValueWidgetView widgetView = new ComputedValueWidgetView();

		widgetView.setWidgetViewDelegate(questionViewController);

		questionViewController.setWidgetView(widgetView);

		currentlyCreatedViewController = questionViewController;
	}
}