diff -r 9bd0d6e0c279 -r c1acf0018c0a lemon/bits/vector_map.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lemon/bits/vector_map.h	Sun Jan 20 20:43:48 2008 +0100
@@ -0,0 +1,243 @@
+/* -*- C++ -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2003-2007
+ * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Research Group on Combinatorial Optimization, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+#ifndef LEMON_BITS_VECTOR_MAP_H
+#define LEMON_BITS_VECTOR_MAP_H
+
+#include <vector>
+#include <algorithm>
+
+#include <lemon/bits/traits.h>
+#include <lemon/bits/utility.h>
+
+#include <lemon/bits/alteration_notifier.h>
+
+#include <lemon/concept_check.h>
+#include <lemon/concepts/maps.h>
+
+///\ingroup graphbits
+///
+///\file
+///\brief Vector based graph maps.
+namespace lemon {
+
+  /// \ingroup graphbits
+  ///
+  /// \brief Graph map based on the std::vector storage.
+  ///
+  /// The VectorMap template class is graph map structure what
+  /// automatically updates the map when a key is added to or erased from
+  /// the map. This map type uses the std::vector to store the values.
+  ///
+  /// \param Notifier The AlterationNotifier that will notify this map.
+  /// \param Item The item type of the graph items.
+  /// \param Value The value type of the map.
+  /// 
+  /// \author Balazs Dezso  	
+  template <typename _Graph, typename _Item, typename _Value>
+  class VectorMap 
+    : public ItemSetTraits<_Graph, _Item>::ItemNotifier::ObserverBase {
+  private:
+		
+    /// The container type of the map.
+    typedef std::vector<_Value> Container;	
+
+  public:
+
+    /// The graph type of the map. 
+    typedef _Graph Graph;
+    /// The item type of the map.
+    typedef _Item Item;
+    /// The reference map tag.
+    typedef True ReferenceMapTag;
+
+    /// The key type of the map.
+    typedef _Item Key;
+    /// The value type of the map.
+    typedef _Value Value;
+
+    /// The notifier type.
+    typedef typename ItemSetTraits<_Graph, _Item>::ItemNotifier Notifier;
+
+    /// The map type.
+    typedef VectorMap Map;
+    /// The base class of the map.
+    typedef typename Notifier::ObserverBase Parent;
+
+    /// The reference type of the map;
+    typedef typename Container::reference Reference;
+    /// The const reference type of the map;
+    typedef typename Container::const_reference ConstReference;
+
+
+    /// \brief Constructor to attach the new map into the notifier.
+    ///
+    /// It constructs a map and attachs it into the notifier.
+    /// It adds all the items of the graph to the map.
+    VectorMap(const Graph& graph) {
+      Parent::attach(graph.notifier(Item()));
+      container.resize(Parent::notifier()->maxId() + 1);
+    }
+
+    /// \brief Constructor uses given value to initialize the map. 
+    ///
+    /// It constructs a map uses a given value to initialize the map. 
+    /// It adds all the items of the graph to the map.
+    VectorMap(const Graph& graph, const Value& value) {
+      Parent::attach(graph.notifier(Item()));
+      container.resize(Parent::notifier()->maxId() + 1, value);
+    }
+
+    /// \brief Copy constructor
+    ///
+    /// Copy constructor.
+    VectorMap(const VectorMap& _copy) : Parent() {
+      if (_copy.attached()) {
+	Parent::attach(*_copy.notifier());
+	container = _copy.container;
+      }
+    }
+
+    /// \brief Assign operator.
+    ///
+    /// This operator assigns for each item in the map the
+    /// value mapped to the same item in the copied map.  
+    /// The parameter map should be indiced with the same
+    /// itemset because this assign operator does not change
+    /// the container of the map. 
+    VectorMap& operator=(const VectorMap& cmap) {
+      return operator=<VectorMap>(cmap);
+    }
+
+
+    /// \brief Template assign operator.
+    ///
+    /// The given parameter should be conform to the ReadMap
+    /// concecpt and could be indiced by the current item set of
+    /// the NodeMap. In this case the value for each item
+    /// is assigned by the value of the given ReadMap. 
+    template <typename CMap>
+    VectorMap& operator=(const CMap& cmap) {
+      checkConcept<concepts::ReadMap<Key, _Value>, CMap>();
+      const typename Parent::Notifier* nf = Parent::notifier();
+      Item it;
+      for (nf->first(it); it != INVALID; nf->next(it)) {
+        set(it, cmap[it]);
+      }
+      return *this;
+    }
+    
+  public:
+
+    /// \brief The subcript operator.
+    ///
+    /// The subscript operator. The map can be subscripted by the
+    /// actual items of the graph.      
+    Reference operator[](const Key& key) {
+      return container[Parent::notifier()->id(key)];
+    } 
+		
+    /// \brief The const subcript operator.
+    ///
+    /// The const subscript operator. The map can be subscripted by the
+    /// actual items of the graph. 
+    ConstReference operator[](const Key& key) const {
+      return container[Parent::notifier()->id(key)];
+    }
+
+
+    /// \brief The setter function of the map.
+    ///
+    /// It the same as operator[](key) = value expression.
+    void set(const Key& key, const Value& value) {
+      (*this)[key] = value;
+    }
+
+  protected:
+
+    /// \brief Adds a new key to the map.
+    ///		
+    /// It adds a new key to the map. It called by the observer notifier
+    /// and it overrides the add() member function of the observer base.     
+    virtual void add(const Key& key) {
+      int id = Parent::notifier()->id(key);
+      if (id >= int(container.size())) {
+	container.resize(id + 1);
+      }
+    }
+
+    /// \brief Adds more new keys to the map.
+    ///		
+    /// It adds more new keys to the map. It called by the observer notifier
+    /// and it overrides the add() member function of the observer base.     
+    virtual void add(const std::vector<Key>& keys) {
+      int max = container.size() - 1;
+      for (int i = 0; i < int(keys.size()); ++i) {
+        int id = Parent::notifier()->id(keys[i]);
+        if (id >= max) {
+          max = id;
+        }
+      }
+      container.resize(max + 1);
+    }
+
+    /// \brief Erase a key from the map.
+    ///
+    /// Erase a key from the map. It called by the observer notifier
+    /// and it overrides the erase() member function of the observer base.     
+    virtual void erase(const Key& key) {
+      container[Parent::notifier()->id(key)] = Value();
+    }
+
+    /// \brief Erase more keys from the map.
+    ///
+    /// Erase more keys from the map. It called by the observer notifier
+    /// and it overrides the erase() member function of the observer base.     
+    virtual void erase(const std::vector<Key>& keys) {
+      for (int i = 0; i < int(keys.size()); ++i) {
+	container[Parent::notifier()->id(keys[i])] = Value();
+      }
+    }
+    
+    /// \brief Buildes the map.
+    ///	
+    /// It buildes the map. It called by the observer notifier
+    /// and it overrides the build() member function of the observer base.
+    virtual void build() { 
+      int size = Parent::notifier()->maxId() + 1;
+      container.reserve(size);
+      container.resize(size);
+    }
+
+    /// \brief Clear the map.
+    ///
+    /// It erase all items from the map. It called by the observer notifier
+    /// and it overrides the clear() member function of the observer base.     
+    virtual void clear() { 
+      container.clear();
+    }
+    
+  private:
+		
+    Container container;
+
+  };
+
+}
+
+#endif