/*******************************************************************************
 * Copyright (c) 2009 the CHISEL group and contributors.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Del Myers - initial API and implementation
 *******************************************************************************/
package ca.uvic.chisel.javasketch.ui.internal.presentation;

import java.util.LinkedList;

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

import ca.uvic.chisel.javasketch.data.model.ICall;

/**
 * @author Del Myers
 *
 */
public class BreadCrumbContentProvider implements IStructuredContentProvider {

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
	 */
	@Override
	public Object[] getElements(Object inputElement) {
		LinkedList<Object> activations = new LinkedList<Object>();
		if (inputElement instanceof ICall) {
			ICall current = (ICall) inputElement;
			while (current != null) {
				activations.addFirst(current);
				try {
					current = (ICall) current.getActivation().getArrival().getOrigin();
				} catch (NullPointerException e) {
					current = null;
				} catch (ClassCastException e) {
					current = null;
				}
			}
		}
		activations.addFirst("USER.start()");
		return activations.toArray();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	@Override
	public void dispose() {}

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

}