Util/XmpFile.cs

   1 using System.Xml;
   2 using SemWeb;
   3
   4
   5 namespace Beagle.Util {
   6         public class XmpFile : SemWeb.StatementSource, SemWeb.StatementSink
   7         {
   8                 MetadataStore store;
   9
  10                 public MetadataStore Store {
  11                         get { return store; }
  12                 }
  13
  14                 public XmpFile (System.IO.Stream stream) : this ()
  15                 {
  16                         Load (stream);
  17                 }
  18
  19                 public XmpFile ()
  20                 {
  21                         store = new MetadataStore ();
  22                 }
  23
  24                 public void Load (System.IO.Stream stream)
  25                 {
  26                         try {
  27                                 store.Import (new SemWeb.RdfXmlReader (stream));
  28                                 //Dump ();
  29                         } catch (System.Exception e) {
  30                                 System.Console.WriteLine (e.ToString ());
  31                         }
  32                 }
  33
  34                 public void Save (System.IO.Stream stream)
  35                 {
  36                         try {
  37                                 XmlTextWriter text;
  38                                 RdfXmlWriter writer;
  39
  40                                 text = new XmlTextWriter (stream, System.Text.Encoding.UTF8);
  41                                 using (writer = new RdfXmlWriter (text, MetadataStore.Namespaces)) {
  42                                         text.WriteProcessingInstruction ("xpacket", "begin=\"\ufeff\" id=\"testing\"");
  43                                         text.WriteStartElement ("x:xmpmeta");
  44                                         text.WriteAttributeString ("xmlns", "x", null, "adobe:ns:meta/");
  45                                         store.Select (writer);
  46
  47                                 }
  48                                 text.WriteEndElement ();
  49                                 text.WriteProcessingInstruction ("xpacket", "end=\"r\"");
  50                                 text.Close ();
  51
  52                         } catch (System.Exception e) {
  53                                 System.Console.WriteLine (e);
  54                         }
  55                 }
  56
  57                 public bool Add (Statement stmt)
  58                 {
  59                         return ((SemWeb.StatementSink)store).Add (stmt);
  60                 }
  61
  62                 public void Select (SemWeb.StatementSink sink)
  63                 {
  64                         store.Select (sink);
  65                 }
  66
  67                 public void Dump ()
  68                 {
  69                         foreach (SemWeb.Statement stmt in store) {
  70                                 System.Console.WriteLine(stmt);
  71                         }
  72                 }
  73
  74 #if TEST_XMP
  75                 static void Main (string [] args)
  76                 {
  77                         XmpFile xmp = new XmpFile (System.IO.File.OpenRead (args [0]));
  78                         //xmp.Store.Dump ();
  79 #if false
  80                         System.IO.StreamReader stream = new System.IO.StreamReader (System.IO.File.OpenRead (args [0]));
  81
  82                         while (stream.BaseStream.Position < stream.BaseStream.Length) {
  83                                 System.Console.WriteLine (stream.ReadLine ());
  84                         }
  85 #endif
  86                 }
  87 #endif
  88         }
  89 }