Changeset 119 for branches/XmlTextWriterBranch/HeuristicLab.Core/PersistenceManager.cs

Timestamp:

04/14/08 17:49:47 (16 years ago)

Author:

gkronber

Message:

created a branch that uses XmlTextWriter instead of XMLDocument to save documents. Investigating ticket #103.

Location:

branches/XmlTextWriterBranch

Files:

• . (copied) (copied from trunk/sources)
• HeuristicLab.Core/PersistenceManager.cs (modified) (2 diffs)

branches/XmlTextWriterBranch/HeuristicLab.Core/PersistenceManager.cs

@@ -28 +28 @@
 namespace HeuristicLab.Core {
   public static class PersistenceManager {
-    public static XmlDocument CreateXmlDocument() {
-      XmlDocument document = new XmlDocument();
-      document.AppendChild(document.CreateXmlDeclaration("1.0", null, null));
-      return document;
+    //public static XmlDocument CreateXmlDocument() {
+    //  XmlDocument document = new XmlDocument();
+    //  document.AppendChild(document.CreateXmlDeclaration("1.0", null, null));
+    //  return document;
+    //}
+    public static void Persist(IStorable instance, XmlWriter writer, IDictionary<Guid, IStorable> persistedObjects) {
+      Persist(instance.GetType().Name, instance, writer, persistedObjects);
     }
-    public static XmlNode Persist(IStorable instance, XmlDocument document, IDictionary<Guid, IStorable> persistedObjects) {
-      return Persist(instance.GetType().Name, instance, document, persistedObjects);
-    }
-    public static XmlNode Persist(string name, IStorable instance, XmlDocument document, IDictionary<Guid, IStorable> persistedObjects) {
+    public static void Persist(string name, IStorable instance, XmlWriter writer, IDictionary<Guid, IStorable> persistedObjects) {
       if (persistedObjects.ContainsKey(instance.Guid)) {
-        XmlNode node = document.CreateNode(XmlNodeType.Element, name, null);
-        XmlAttribute guidAttribute = document.CreateAttribute("GUID");
-        guidAttribute.Value = instance.Guid.ToString();
-        node.Attributes.Append(guidAttribute);
-        return node;
+        writer.WriteStartElement(name, null);
+        writer.WriteAttributeString("GUID", instance.Guid.ToString());
+        writer.WriteEndElement();
+
+        //XmlNode node = document.CreateNode(XmlNodeType.Element, name, null);
+        //XmlAttribute guidAttribute = document.CreateAttribute("GUID");
+        //guidAttribute.Value = instance.Guid.ToString();
+        //node.Attributes.Append(guidAttribute);
+        //return node;
       } else {
         persistedObjects.Add(instance.Guid, instance);
-        XmlNode node = instance.GetXmlNode(name, document, persistedObjects);
-        return node;
+        writer.WriteStartElement(name);
+        instance.Persist(name, writer, persistedObjects);
+        writer.WriteEndElement();
+        //XmlNode node = instance.GetXmlNode(name, document, persistedObjects);
+        //return node;
       }
     }
+
     public static IStorable Restore(XmlNode node, IDictionary<Guid,IStorable> restoredObjects) {
       Guid guid = new Guid(node.Attributes["GUID"].Value);
@@ -67 +75 @@
     }
     public static void Save(IStorable instance, Stream stream) {
-      XmlDocument document = PersistenceManager.CreateXmlDocument();
-      document.AppendChild(Persist(instance, document, new Dictionary<Guid, IStorable>()));
-      document.Save(stream);
+      XmlTextWriter writer = new XmlTextWriter(stream, null);
+      writer.Formatting = Formatting.Indented;
+      writer.WriteProcessingInstruction("xml", "version=\"1.0\"");
+      Persist(instance, writer, new Dictionary<Guid, IStorable>());      
+      writer.Flush();
+      writer.Close();
     }
     public static IStorable Load(string filename) {