node.cpp

   1 #include "node.h"
   2 #include <algorithm>
   3 #include <iostream>
   4 using namespace std;
   5
   6 Node::Node(const Action* action){
   7         _action = action;
   8         _preconditions = _action->preconditions();
   9         _executed = false;
  10 }
  11 Node::Node(){
  12         _executed = false;
  13 }
  14
  15 Node::Node(const Node& node){
  16         _action = node._action;
  17         _preconditions = node._preconditions;
  18         _executed = node._executed;
  19 }
  20
  21 const Action* Node::action() const{
  22         return _action;
  23 }
  24
  25
  26 void Node::addChild(Node* node){
  27         _children.push_back(node);
  28 }
  29
  30 bool Node::executed() const{
  31         return _executed;
  32 }
  33
  34 const Literals& Node::effects() const{
  35         return _effects;
  36 }
  37 void Node::satisfyCondition(std::string effect){
  38         _preconditions.erase(_preconditions.find(effect));
  39 }
  40
  41 void Node::execute(const Literals& effects){
  42         cerr << "Executing: " << _action->name() << endl;
  43         for (Literals::const_iterator effect = effects.begin(); effect != effects.end(); ++effect){
  44                 cerr << "Satisfied effect: " << *effect << endl;
  45                 _preconditions.erase(_preconditions.find(*effect));
  46         }
  47         cerr << "Number of preconditions left: " << _preconditions.size() << endl;
  48         if(_executed)
  49                 cerr << "Already executed" << endl;
  50         if ((_preconditions.size() != 0) || _executed)
  51                 return;
  52
  53         _executed = true;
  54         int value = _action->execute();
  55         _effects = _action->effects(value);
  56
  57         cerr << "Got returnvalue: " << value << ", number of effects: " << _effects.size() << endl;
  58
  59         for(vector<Node*>::iterator child = _children.begin(); child != _children.end(); ++child){
  60                 (*child)->execute(_effects);
  61         }
  62 }
  63
  64 StartNode::StartNode(const Literals& init){
  65         EffectsMap initial;
  66         initial[0] = init;
  67         _action = new Action("start",Preconditions(),"", initial);
  68 }
  69
  70 EndNode::EndNode(const Literals& goal){
  71         Preconditions goalState;
  72         for(Literals::const_iterator g = goal.begin(); g != goal.end(); ++g)
  73                 goalState[*g] = true;
  74         _action = new Action("finish",goalState,"",EffectsMap());
  75         _preconditions = _action->preconditions();
  76 }
  77