--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlib/naming/DTNScheme.h	Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,101 @@
+/*
+ *    Copyright 2005-2006 Intel Corporation
+ * 
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+#ifndef _DTN_SCHEME_H_
+#define _DTN_SCHEME_H_
+
+#include "Scheme.h"
+#include <oasys/util/Singleton.h>
+
+namespace dtn {
+
+/**
+ * This class implements the one default scheme as specified in the
+ * bundle protocol. SSPs for this scheme take the canonical forms:
+ *
+ * <code>
+ * dtn://<router identifier>[/<application tag>]
+ * dtn:none
+ * </code>
+ *
+ * Where "router identifier" is a DNS-style "hostname" string, however
+ * not necessarily a valid internet hostname, and "application tag" is
+ * any string of URI-valid characters.
+ *
+ * The special endpoint identifier "dtn:none" is used to represent the
+ * null endpoint.
+ *
+ * This implementation also supports limited wildcard matching for
+ * endpoint patterns.
+ */
+class DTNScheme : public Scheme, public oasys::Singleton<DTNScheme> {
+public:
+    /**
+     * Validate that the SSP in the given URI is legitimate for
+     * this scheme. If the 'is_pattern' paraemeter is true, then
+     * the ssp is being validated as an EndpointIDPattern.
+     *
+     * @return true if valid
+     */
+    virtual bool validate(const URI& uri, bool is_pattern = false);
+
+    /**
+     * Match the pattern to the endpoint id in a scheme-specific
+     * manner.
+     */
+    virtual bool match(const EndpointIDPattern& pattern,
+                       const EndpointID& eid);
+    
+    /**
+     * Append the given service tag to the uri in a scheme-specific
+     * manner.
+     *
+     * @return true if this scheme is capable of service tags and the
+     * tag is a legal one, false otherwise.
+     */
+    virtual bool append_service_tag(URI* uri, const char* tag);
+
+    /**
+     * Append a wildcard tag to the uri in a scheme-specific
+     * manner.
+     *
+     * @return true if this scheme is capable of wildcards and the
+     * wildcard is appended, false otherwise.
+     */
+    virtual bool append_service_wildcard(URI* uri);
+
+    /**
+     * Reduce URI to node ID in a scheme specific manner. The default
+     * scheme is not capable of this.
+     *
+     * @return true if this scheme is capable of this reduction and 
+     * the reduction is successful, else false.
+     */
+    virtual bool remove_service_tag(URI* uri);
+
+    /**
+     * Check if the given URI is a singleton EID.
+     */
+    virtual singleton_info_t is_singleton(const URI& uri);
+    
+private:
+    friend class oasys::Singleton<DTNScheme>;
+    DTNScheme() {}
+};
+    
+}
+
+#endif /* _DTN_SCHEME_H_ */