/*******************************************************************************
 * Copyright (c) 2004, 2005 QNX Software Systems and others.
 * 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:
 *     QNX Software Systems - Initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.debug.internal.core.sourcelookup; 

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.debug.core.sourcelookup.ISourceContainer;
import org.eclipse.debug.core.sourcelookup.containers.AbstractSourceContainerTypeDelegate;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
 
/**
 * The map entry container type.
 */
public class MapEntrySourceContainerType extends AbstractSourceContainerTypeDelegate {
	private final static String ELEMENT_NAME = "mapEntry"; //$NON-NLS-1$
	private final static String BACKEND_PATH = "backendPath"; //$NON-NLS-1$
	private final static String LOCAL_PATH = "localPath"; //$NON-NLS-1$

	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.sourcelookup.ISourceContainerTypeDelegate#createSourceContainer(java.lang.String)
	 */
	@Override
	public ISourceContainer createSourceContainer(String memento) throws CoreException {
		Node node = parseDocument(memento);
		if (node.getNodeType() == Node.ELEMENT_NODE) {
			Element element = (Element)node;
			if (ELEMENT_NAME.equals(element.getNodeName())) {
				String path = element.getAttribute(BACKEND_PATH);
				IPath backend = MapEntrySourceContainer.createPath(path);
				if (!backend.isValidPath(path)) {
					abort(InternalSourceLookupMessages.MapEntrySourceContainerType_0, null);
				}
				path = element.getAttribute(LOCAL_PATH);
				IPath local = new Path(path);
				if (!local.isValidPath(path)) {
					abort(InternalSourceLookupMessages.MapEntrySourceContainerType_1, null);
				}
				return new MapEntrySourceContainer(backend, local);
			}
			abort(InternalSourceLookupMessages.MapEntrySourceContainerType_2, null);
		}
		abort(InternalSourceLookupMessages.MapEntrySourceContainerType_3, null);
		return null;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.sourcelookup.ISourceContainerTypeDelegate#getMemento(org.eclipse.debug.core.sourcelookup.ISourceContainer)
	 */
	@Override
	public String getMemento(ISourceContainer container) throws CoreException {
		MapEntrySourceContainer entry = (MapEntrySourceContainer) container;
		Document document = newDocument();
		Element element = document.createElement(ELEMENT_NAME);
		element.setAttribute(BACKEND_PATH, entry.getBackendPath().toOSString());
		element.setAttribute(LOCAL_PATH, entry.getLocalPath().toOSString());
		document.appendChild(element);
		return serializeDocument(document);
	}
}
