// Cqc.h - CUSTOMER QUERY CACHE DECLARATIONS
//
// MAINTENANCE HISTORY
// DATE		PROGRAMMER AND DETAILS
// 25-09-10	JS	Original
//
//-----------------------------------------------------------------------------

// CUSTOMER DATA STRUCTURE

struct Cust_t {
	long		custId;		// Customer identifier
	string		custName;	// Customer name

	Cust_t () {}
					// Default constructor
	Cust_t (const Cust_t &cust)
		: custId (cust.custId), custName (cust.custName) {}
					// Copy constructor
	Cust_t &operator = (const Cust_t &cust)
		{ custId = cust.custId; custName = cust.custName; }
					// Assignment operator
};

//-----------------------------------------------------------------------------

// CUSTOMER QUERY CACHE

class Cqc_c {

	// Customer Data Comparator

	struct CustCmp_c {
		inline bool
		operator () (
			const Cust_t	&c1,		// First customer record
			const Cust_t	&c2)		// Second cusomer record
		{
			return c1.custId < c2.custId;
		}
	};

	// Customer Data Set Type Definition

	typedef set<Cust_t,CustCmp_c> CqcCustSet_t;
					// Customer set type
	typedef CqcCustSet_t::iterator CqcCustIter_t;
					// Customer set iterator

	// Class Instance Variables

	CqcCustSet_t	cqcCustSet;	// Customer set
	CqcCustIter_t	cqcCustIter;	// Customer iterator

	// Public Methods
public:
	void CqcInsert (const Cust_t *cust);
				// Insert a customer record into the cache
	void CqcRemove (long custId);
				// Remove the customer record with customer
				// identifier 'custId' from the cache
	void CqcSelect (const char *key);
				// Select the customers with names that
				// match 'key'.  'key' may contain wild cards.
				// For example, "*" selects all customers.
	const Cust_t *CqcNextCust ();
				// Return a pointer to the next selected
				// customer data structure, return zero at
				// end-of-file.
};