/*******************************************************************************
 * Copyright (c) 2001, 2004 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.wst.xml.ui.internal.wizards;

import org.eclipse.core.resources.IFile;
import org.eclipse.wst.common.uriresolver.internal.util.URIHelper;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

public class XMLSchemaValidationChecker {
	public boolean isValid(IFile ifile) {
		String xsdFileName = ifile.getLocation().toString();
		return isValid(xsdFileName);
	}

	/**
	 * Should this be implemented as a Validator and simply called as such
	 * with a reporter that only checks the results for severity = error? Or
	 * should the Xerces requirement be broken using a plug-in extension?
	 */

	public boolean isValid(String xsdFileName) {
		// DOMASBuilderImpl builder = new DOMASBuilderImpl();
		// DOMErrorHandler errorHandler = new DOMErrorHandler();
		// builder.setErrorHandler(errorHandler);
		try {
			// String uri =
			URIHelper.getURIForFilePath(xsdFileName);
			// ASModel model = builder.parseASURI(uri);
			// if (errorHandler.hasError())
			// return false;
		}
		catch (Exception e) // invalid schema
		{
			return false;
		}

		return true;
	}

	// inner class
	class DOMErrorHandler implements ErrorHandler {
		private boolean hasError = false;

		public boolean hasError() {
			return hasError;
		}

		public void error(SAXParseException err) {
			hasError = true;
		}

		public void fatalError(SAXParseException exception) throws SAXException {
			hasError = true;
		}

		public void warning(SAXParseException exception) throws SAXException {
			// not an error
		}
	} // end DOMErrorHandlerImpl

}