using System;
using System.Collections.Generic;
using System.Xml;
//+
namespace General.Xml
{
    public static class XmlSimpleExtractor
    {
        //- @ExtractBranch -//
        public static List<String> ExtractBranch(XmlNode mailRoot, String branchName, Boolean required)
        {
            List<String> list = new List<String>();
            XmlNode result = mailRoot.SelectSingleNode(branchName);
            if (result != null && result.HasChildNodes)
            {
                foreach (XmlNode node in result.ChildNodes)
                {
                    list.Add(node.InnerText);
                }
            }
            else
            {
                if (required)
                {
                    throw new XmlException(String.Format("Missing element '{0}'", branchName));
                }
            }
            //+
            return list;
        }

        //- @ExtractText -//
        public static String ExtractText(XmlNode mailRoot, String nodeName)
        {
            XmlNode result = mailRoot.SelectSingleNode(nodeName);
            if (result != null)
            {
                return result.InnerText;
            }
            else
            {
                throw new XmlException(String.Format("Missing element '{0}'", nodeName));
            }
        }
    }
}