98 lines
2.7 KiB
C#
98 lines
2.7 KiB
C#
using System;
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using System.Xml.Serialization;
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using System.Configuration;
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using System.IO;
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using System.Xml;
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using Yavsc.Model.FrontOffice;
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using System.Web;
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namespace SalesCatalog.XmlImplementation
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{
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/// <summary>
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/// Xml catalog provider.
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/// In charge of getting the catalog data,
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/// returning a Catalog object from GetCatalog
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/// </summary>
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public class XmlCatalogProvider: CatalogProvider
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{
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#region implemented abstract members of SalesCatalog.CatalogProvider
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/// <summary>
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/// Gets the catalog, loading it from
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/// the file system at a first call,
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/// and when its last write time has changed.
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/// </summary>
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/// <returns>The catalog.</returns>
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public override Catalog GetCatalog ()
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{
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// Assert fileName != null
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FileInfo fi = new FileInfo (fileName);
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if (!fi.Exists)
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throw new ConfigurationErrorsException(
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string.Format("No catalog found ({0})",fileName));
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if (fi.LastWriteTime > lastModification)
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LoadCatalog ();
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return catInstance;
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}
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/// <summary>
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/// The catalog instance.
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/// </summary>
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protected XmlCatalog catInstance = null;
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/// <summary>
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/// The last modification date of the file loaded.
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/// </summary>
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protected DateTime lastModification = new DateTime(0);
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/// <summary>
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/// The name of the file loaded.
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/// </summary>
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protected string fileName = null;
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#endregion
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/// <summary>
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/// Initialize the catalog
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/// using the specified name and config.
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/// The config object contains under the key
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/// <c>connection</c> the path to the Xml Catalog file
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/// at server side.
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/// </summary>
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/// <param name="name">Name.</param>
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/// <param name="config">Config.</param>
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public override void Initialize (string name, System.Collections.Specialized.NameValueCollection config)
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{
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if (config ["connection"] == null)
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throw new Exception ("the 'connection' parameter is null " +
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"(it should be the absolute path to the xml catalog)");
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string cnx = (string) config ["connection"];
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fileName = HttpContext.Current.Server.MapPath(cnx);
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LoadCatalog ();
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}
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private void LoadCatalog ()
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{
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try {
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FileInfo fi = new FileInfo (fileName);
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if (!fi.Exists)
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throw new Exception (
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string.Format ("Le fichier Xml decrivant le catalogue n'existe pas ({0})", fi.FullName));
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XmlSerializer xsr = new XmlSerializer (typeof(XmlCatalog),new Type[]{
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typeof(Service),
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typeof(PhysicalProduct),
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typeof(Euro),
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typeof(Text),
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typeof(TextInput),
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typeof(SelectInput)});
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using (FileStream fs = fi.OpenRead()) {
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catInstance = (XmlCatalog) xsr.Deserialize (fs);
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}
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fileName = fi.FullName;
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lastModification = fi.LastWriteTime;
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}
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catch (Exception e) {
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lastModification = new DateTime (0);
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throw e;
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}
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}
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}
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}
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