/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.data.ows;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.geotools.ows.ServiceException;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
/**
* Utility class that will parse ServiceExceptions out of an inputStream.
*
* @author rgould
*
*
*
*
* @source $URL$
*/
public class ServiceExceptionParser {
/**
* Tries to read a ServiceExceptionReport from the input stream, and
* construct a chain of ServiceExceptions.
*
* ServiceExceptions beyond the first can be accessed using
* ServiceException.next();
*
* @param inputStream
* @throws JDOMException
* @throws IOException
*/
public static ServiceException parse(InputStream inputStream) throws JDOMException, IOException {
SAXBuilder builder = new SAXBuilder();
Document document = builder.build(inputStream);
Element root = document.getRootElement();
List serviceExceptions = root.getChildren("ServiceException");
/*
* ServiceExceptions with codes get bumped to the top of the list.
*/
List codes = new ArrayList();
List noCodes = new ArrayList();
for (int i = 0; i < serviceExceptions.size(); i++) {
Element element = (Element) serviceExceptions.get(i);
ServiceException exception = parseSE(element);
if (exception.getCode() != null && exception.getCode().length() != 0 ) {
codes.add(exception);
} else {
noCodes.add(exception);
}
}
/*
* Now chain them.
*/
ServiceException firstException = null;
ServiceException recentException = null;
for (int i = 0; i < codes.size(); i++) {
ServiceException exception = (ServiceException) codes.get(i);
if (firstException == null) {
firstException = exception;
recentException = exception;
} else {
recentException.setNext(exception);
recentException = exception;
}
}
codes = null;
for (int i = 0; i < noCodes.size(); i++) {
ServiceException exception = (ServiceException) noCodes.get(i);
if (firstException == null) {
firstException = exception;
recentException = exception;
} else {
recentException.setNext(exception);
recentException = exception;
}
}
noCodes = null;
return firstException;
}
private static ServiceException parseSE(Element element) {
String errorMessage = element.getText();
String code = element.getAttributeValue("code");
return new ServiceException(errorMessage, code);
}
}