table.hh

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#ifndef TABLE_H
#define TABLE_H

#include "std_cpp_includes.hh"
#include "except.hh"
#include "utility.hh"

namespace RVL {

  // ASCII Parameter Table Object.
  //    This class implements the HCL associative array (hash table)
  //    interface defined in the {\bf AbstractTable} base class.

  //    The principal Table constructor reads the Table's internal data
  //    from a "config" file. Each line of the config file is either of
  //    the form "Key = Value" or "Object::Key = Value".  The first form
  //    initializes the parameter associated to "Key" in the table to the
  //    value "Value". The second form facilitates the use of one config
  //    file for several different objects. If the "Object" matches one of
  //    the object names provided by the user (as argument to the
  //    constructor, see below), then the parameter is read/written as
  //    before. Otherwise, the line is ignored.  The type of "Value" can
  //    be integer, float, double, or string. String values are optionally
  //    enclosed by double-quotes.


  class Table {

  private:

    typedef map<string,string> str_map;
    typedef str_map::iterator iterator;
    typedef str_map::const_iterator const_iterator;
    typedef str_map::value_type value_type;
  
    string prefixes;
    str_map table;

    static bool isPunct(char c);
    static string stripWord(const string word);
  
  public:

    // usual constructor
    Table(string fname="",string prefixes="");

    // Copy constructor 
    Table(const Table & T);

    // Destructor 
    virtual ~Table();

    // Merge entries from a file into the parameter table 
    int mergeFile(string fname);

    // Returns size of the table
    int getSize() const { return table.size(); }

    // Returns ith key (do we want this one?)
    string getKey(unsigned i);

    // Returns ith value (do we want this one?)
    string strValue(string key);

    // Methods to access values in the table 
    int getValue(string key,int & value) const;
    int getValue(string key,double & value) const;
    int getValue(string key,float & value) const;
    int getValue(string key,string & value,int length=0) const;
  
    // Methods to insert new pairs (key-value) in the table 
    void putValue(string key,int value);
    void putValue(string key,float value);
    void putValue(string key,double value);
    void putValue(string key,const string value);

    // idem (?do we really need those?)
    int getArrayValue(string key,int ind,int & value) const;
    int getArrayValue(string key,int ind,float & value) const;
    int getArrayValue(string key,int ind,double & value) const;
    int getArrayValue(string key,int ind,string & value,int length=0) const;

    // idem (?do we really need those?)
    void putArrayValue(string key,int ind,int value);
    void putArrayValue(string key,int ind,float value);
    void putArrayValue(string key,int ind,double value);
    void putArrayValue(string key,int ind,const string value);
  
    ostream & write(ostream & os);
  
  };

  ostream & operator << (ostream & os,Table & t);

  // convenient helper functions added 12.05 WWS
  // deprecated 04.07 WWS
  string getStringFromTable(Table const & par, string key);
  int getIntFromTable(Table const & par, string key);
  float getFloatFromTable(Table const & par, string key);
  double getDoubleFromTable(Table const & par, string key);

  template<typename Scalar>
  Scalar getValueFromTable(Table const & par, string key);

  template<>
  int getValueFromTable<int>(Table const & par, string key);

  template<>
  double getValueFromTable<double>(Table const & par, string key);

  template<>
  float getValueFromTable<float>(Table const & par, string key);

  template<>
  string getValueFromTable<string>(Table const & par, string key);
  
  template<>
  bool getValueFromTable<bool>(Table const & par, string key);
  
}

#endif

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