diff -r 9ba88ddc629c -r 4283998fb2be src/lemon/graph_reader.h
--- a/src/lemon/graph_reader.h	Thu May 19 11:46:42 2005 +0000
+++ b/src/lemon/graph_reader.h	Thu May 19 11:49:42 2005 +0000
@@ -299,6 +299,22 @@
       reader->run();
     }
 
+    /// \brief Gives back the node by its id.
+    ///
+    /// It reads an id from the stream and gives back which node belongs to
+    /// it. It is possible only if there was read an "id" named node map.
+    Node readId(std::istream& is, Node) const {
+      return nodeset_reader.readId(is, Node());
+    } 
+
+    /// \brief Gives back the edge by its id.
+    ///
+    /// It reads an id from the stream and gives back which edge belongs to
+    /// it. It is possible only if there was read an "id" named edge map.
+    Edge readId(std::istream& is, Edge) const {
+      return edgeset_reader.readId(is, Edge());
+    } 
+
   private:
 
     LemonReader* reader;
@@ -673,6 +689,13 @@
     /// \brief Add a new labeled edge reader for the reader.
     ///
     /// Add a new labeled edge reader for the reader.
+    UndirGraphReader& readEdge(std::string name, Edge& edge) {
+      undir_edge_reader.readEdge(name, edge);
+    }
+
+    /// \brief Add a new labeled undirected edge reader for the reader.
+    ///
+    /// Add a new labeled undirected edge reader for the reader.
     UndirGraphReader& readUndirEdge(std::string name, UndirEdge& edge) {
       undir_edge_reader.readUndirEdge(name, edge);
     }
@@ -713,6 +736,32 @@
       reader->run();
     }
 
+    /// \brief Gives back the node by its id.
+    ///
+    /// It reads an id from the stream and gives back which node belongs to
+    /// it. It is possible only if there was read an "id" named node map.
+    Node readId(std::istream& is, Node) const {
+      return nodeset_reader.readId(is, Node());
+    } 
+
+    /// \brief Gives back the edge by its id.
+    ///
+    /// It reads an id from the stream and gives back which edge belongs to
+    /// it. It is possible only if there was read an "id" named edge map.
+    Edge readId(std::istream& is, Edge) const {
+      return undir_edgeset_reader.readId(is, Edge());
+    } 
+
+    /// \brief Gives back the undirected edge by its id.
+    ///
+    /// It reads an id from the stream and gives back which undirected edge 
+    /// belongs to it. It is possible only if there was read an "id" named 
+    /// edge map.
+    UndirEdge readId(std::istream& is, UndirEdge) const {
+      return undir_edgeset_reader.readId(is, UndirEdge());
+    } 
+    
+
   private:
 
     LemonReader* reader;