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package viewhandler;

import java.io.IOException;
import java.util.Locale;
import java.util.Map;
import javax.faces.FacesException;
import javax.faces.application.ViewHandler;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;

/**
 *
 * @author lluis
 */
public class CustomViewHandler extends ViewHandler
{

	protected ViewHandler baseViewHandler;

	public CustomViewHandler( ViewHandler viewHandler )
	{
		super();
		this.baseViewHandler = viewHandler;
	}

	@Override
	public Locale calculateLocale( FacesContext facesContext )
	{
		return baseViewHandler.calculateLocale( facesContext );
	}

	@Override
	public String calculateRenderKitId( FacesContext facesContext )
	{
		return baseViewHandler.calculateRenderKitId( facesContext );
	}

	@Override
	public UIViewRoot createView( FacesContext facesContext, String arg1 )
	{
		setPostback( facesContext, false );
		return baseViewHandler.createView( facesContext, arg1 );
	}

	@Override
	public String getActionURL( FacesContext facesContext, String arg1 )
	{
		return baseViewHandler.getActionURL( facesContext, arg1 );
	}

	@Override
	public String getResourceURL( FacesContext facesContext, String arg1 )
	{
		return baseViewHandler.getResourceURL( facesContext, arg1 );
	}

	@Override
	public void renderView( FacesContext facesContext, UIViewRoot arg1 ) throws IOException, FacesException
	{
		baseViewHandler.renderView( facesContext, arg1 );

	}

	@Override
	public UIViewRoot restoreView( FacesContext facesContext, String arg1 )
	{
		setPostback( facesContext, true );
		return baseViewHandler.restoreView( facesContext, arg1 );
	}

	@Override
	public void writeState( FacesContext facesContext ) throws IOException
	{
		baseViewHandler.writeState( facesContext );
	}

	public Map getRequestScope( FacesContext facesContext )
	{
		//return (Map)facesContext.getApplication().createValueBinding(?#{requestScope}?).getValue(facesContext);
		//return (Map)facesContext.getApplication().
		return ( Map ) facesContext.getApplication().getExpressionFactory().createValueExpression( facesContext.getELContext(), "#{requestScope}", Map.class ).getValue( facesContext.getELContext() );
	}

	public void setPostback( FacesContext facesContext, boolean value )
	{
		getRequestScope( facesContext ).put( "ispostback", new Boolean( value ) );
	}
}