package net.certware.verification.checklist.view.table;


import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;

/**
 * Content provider for checklist table.
 * Uses the <code>ChecklistModelList</code> as the content.
 * @author mrb
 */
public class ChecklistContentProvider implements IStructuredContentProvider
{
	/** the model content, which is a list of value tool structures */
	protected ChecklistModelList itemList = new ChecklistModelList();

	/**
	 * Return the model.  
	 * @return the item list model   
	 */
	public ChecklistModelList getModel() {
		return itemList;
	}

	/**
	 * Returns the model expanded into an array of objects.
	 * @param inputElement unused
	 * @return an array of objects from the model list 
	 */
	public Object[] getElements(Object inputElement)
	{
		return itemList.getItemList().toArray();
	}

	/**
	 * Disposes the instance.
	 * Clears the item list.
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	public void dispose()
	{
		itemList.getItemList().clear();
	}

	/**
	 * Responds to input change instructions from the viewer.
	 * Unused.
	 * @param viewer unused
	 * @param oldInput unused
	 * @param newInput unused

	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(Viewer, Object, Object) */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
	{
	}
}