dmspine64backup/Relation.h

#include <iostream>
#include <vector>
#include "Attribute.h"

//Functional
class Relation {
	//a table with rows and columns
	string name;		//the name of the relation (table)
	vector<Attribute> att;
	vector<string> attributeNames;
	int size;
	
public:
	//Relation();
	
	void initializeRelation(string n, vector<string> attNames, vector<Attribute> a) { 
		attributeNames = attNames;
		name = n;
		att = a;
		size = 0;
	}
	
	int getSize() { return size; }
	
	void addTuple(vector<string> tuple) {
		if(tuple.size() != att.size()){
			cout << "\n ERROR" << endl;
		}
		else {
			//Loop through the attribute columns
			for(int i = 0; i < att.size(); i++) {
				att[i].pushBack(tuple[i]);
			}
		}
	}
	
	void removeTuple(int tupleNum) {	
		if (tupleNum > att[0].getSize() || tupleNum < 0)
		{
			cout<<"ERROR! index out of bound"<<endl;
		}
		
		else
		{
		
			for(int i = 0; i < att.size(); ++i) //for all the attributes
			{
				att[i].erase(tupleNum);
			}		
		}
	}
	
	void projectQuery(string input) {
		cout << "-----------Initiated Query Projection---------" << endl;
		for(int i = 0; i < att.size(); i++) {
			if(att[i].getName() == input) {
				
				cout << "Column Title: " << input << endl;
				for(int j = 0; j < att[i].getSize(); j++) {
					cout << att[i].values[j] << endl;
				}
				
				break;
			}
			else
				cout << "Attribute input not valid" << endl;
		}
	}

	void display() {
		cout<<"\n\nDisplay of relation--------------------------------"<<endl;
		cout<<"Relation name: "<<name<<endl;
		for (int i = 0; i < attributeNames.size(); ++i)
		{
			
			cout<<"\nAttribute name:	"<<attributeNames[i]<<": ";
			
			att[i].display();
	
		}
	}
};