/*******************************************************************************
 * Copyright (c) 2003, 2005 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.debug.internal.core.sourcelookup.containers;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Path;
import org.eclipse.debug.core.sourcelookup.ISourceContainer;
import org.eclipse.debug.core.sourcelookup.containers.AbstractSourceContainerTypeDelegate;
import org.eclipse.debug.core.sourcelookup.containers.DirectorySourceContainer;
import org.eclipse.debug.internal.core.sourcelookup.SourceLookupMessages;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * A folder in the local file system.
 * 
 * @since 3.0
 */
public class DirectorySourceContainerType extends AbstractSourceContainerTypeDelegate {

	/* (non-Javadoc)
	 * @see org.eclipse.debug.internal.core.sourcelookup.ISourceContainerType#createSourceContainer(java.lang.String)
	 */
	public ISourceContainer createSourceContainer(String memento) throws CoreException {
		Node node = parseDocument(memento);
		if (node.getNodeType() == Node.ELEMENT_NODE) {
			Element element = (Element)node;
			if ("directory".equals(element.getNodeName())) { //$NON-NLS-1$
				String string = element.getAttribute("path"); //$NON-NLS-1$
				if (string == null || string.length() == 0) {
					abort(SourceLookupMessages.DirectorySourceContainerType_10, null); 
				}
				String nest = element.getAttribute("nest"); //$NON-NLS-1$
				boolean nested = "true".equals(nest); //$NON-NLS-1$
				return new DirectorySourceContainer(new Path(string), nested);
			}
			abort(SourceLookupMessages.DirectorySourceContainerType_11, null); 
		}
		abort(SourceLookupMessages.DirectorySourceContainerType_12, null); 
		return null;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.debug.internal.core.sourcelookup.ISourceContainerType#getMemento(org.eclipse.debug.internal.core.sourcelookup.ISourceContainer)
	 */
	public String getMemento(ISourceContainer container) throws CoreException {
		DirectorySourceContainer folder = (DirectorySourceContainer) container;
		Document document = newDocument();
		Element element = document.createElement("directory"); //$NON-NLS-1$
		element.setAttribute("path", folder.getDirectory().getAbsolutePath()); //$NON-NLS-1$
		String nest = "false"; //$NON-NLS-1$
		if (folder.isComposite()) {
			nest = "true"; //$NON-NLS-1$
		}
		element.setAttribute("nest", nest);  //$NON-NLS-1$
		document.appendChild(element);
		return serializeDocument(document);
	}
	
}