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using SemWeb;
using SemWeb.Util;
using Mono.Posix;
namespace Beagle.Util {
public class MetadataStore : MemoryStore
{
public static NamespaceManager Namespaces;
private static MetadataStore descriptions;
static MetadataStore ()
{
Namespaces = new NamespaceManager ();
Namespaces.AddNamespace ("http://ns.adobe.com/photoshop/1.0/", "photoshop");
Namespaces.AddNamespace ("http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/", "Iptc4xmpCore");
Namespaces.AddNamespace ("http://purl.org/dc/elements/1.1/", "dc");
Namespaces.AddNamespace ("http://ns.adobe.com/xap/1.0/", "xmp");
Namespaces.AddNamespace ("http://ns.adobe.com/xmp/Identifier/qual/1.0", "xmpidq");
Namespaces.AddNamespace ("http://ns.adobe.com/xap/1.0/rights/", "xmpRights");
Namespaces.AddNamespace ("http://ns.adobe.com/xap/1.0/bj/", "xmpBJ");
Namespaces.AddNamespace ("http://ns.adobe.com/xap/1.0/mm/", "xmpMM");
Namespaces.AddNamespace ("http://ns.adobe.com/exif/1.0/", "exif");
Namespaces.AddNamespace ("http://ns.adobe.com/tiff/1.0/", "tiff");
Namespaces.AddNamespace ("http://www.w3.org/1999/02/22-rdf-syntax-ns#", "rdf");
Namespaces.AddNamespace ("http://www.w3.org/2000/01/rdf-schema#", "rdfs");
}
public static MetadataStore Descriptions {
get {
if (descriptions == null) {
descriptions = new MetadataStore ();
System.IO.Stream stream = System.Reflection.Assembly.GetCallingAssembly ().GetManifestResourceStream ("dces.rdf");
if (stream != null) {
descriptions.Import (new RdfXmlReader (stream));
} else {
System.Console.WriteLine ("Can't find resource");
}
}
return descriptions;
}
}
public void Dump ()
{
foreach (SemWeb.Statement stmt in this) {
System.Console.WriteLine(stmt);
}
/*
XPathSemWebNavigator navi = new XPathSemWebNavigator (this, Namespaces);
navi.MoveToRoot ();
navi.MoveToFirstChild ();
navi.MoveToFirstChild ();
DumpNode (navi, 0);
*/
/* Use the statement writer to filter the messages */
/*
foreach (string nspace in Namespaces.GetNamespaces ()) {
this.Select (new StatementWriter (nspace));
}
*/
}
public static void AddLiteral (StatementSink sink, string predicate, string type, Literal value)
{
Entity empty = new Entity (null);
Statement top = new Statement ("", (Entity)MetadataStore.Namespaces.Resolve (predicate), empty);
Statement desc = new Statement (empty,
(Entity)MetadataStore.Namespaces.Resolve ("rdf:type"),
(Entity)MetadataStore.Namespaces.Resolve (type));
sink.Add (desc);
Statement literal = new Statement (empty,
(Entity)MetadataStore.Namespaces.Resolve ("rdf:li"),
value);
sink.Add (literal);
sink.Add (top);
}
public static void AddLiteral (StatementSink sink, string predicate, string value)
{
Statement stmt = new Statement ((Entity)"",
(Entity)MetadataStore.Namespaces.Resolve (predicate),
new Literal (value));
sink.Add (stmt);
}
public static void Add (StatementSink sink, string predicate, string type, string [] values)
{
Add (sink, new Entity (""), predicate, type, values);
}
public static void Add (StatementSink sink, Entity subject, string predicate, string type, string [] values)
{
if (values == null) {
System.Console.WriteLine ("{0} has no values; skipping", predicate);
return;
}
Entity empty = new Entity (null);
Statement top = new Statement (subject, (Entity)MetadataStore.Namespaces.Resolve (predicate), empty);
Statement desc = new Statement (empty,
(Entity)MetadataStore.Namespaces.Resolve ("rdf:type"),
(Entity)MetadataStore.Namespaces.Resolve (type));
sink.Add (desc);
foreach (string value in values) {
Statement literal = new Statement (empty,
(Entity)MetadataStore.Namespaces.Resolve ("rdf:li"),
new Literal (value, null, null));
sink.Add (literal);
}
sink.Add (top);
}
private class StatementWriter : StatementSink
{
string name;
public StatementWriter (string name)
{
this.name = name;
}
public bool Add (Statement stmt)
{
string predicate = stmt.Predicate.ToString ();
if (predicate.StartsWith (name))
System.Console.WriteLine ("----------- {0}", stmt);
return true;
}
}
private class SelectFirst : StatementSink
{
public Statement Statement;
public bool Add (Statement stmt)
{
this.Statement = stmt;
return false;
}
}
public void DumpNode (XPathSemWebNavigator navi, int depth)
{
do {
System.Console.WriteLine ("node [{0}] {1} {2}", depth, navi.Name, navi.Value);
} while (navi.MoveToNext ());
}
}
}
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