insertions done

Attribute.cpp

@@ -2,6 +2,13 @@
 #include <vector>
 #include "Attribute.h"
 
+Attribute::Attribute(){ 
+	name = "";
+	type = "";
+	key = 0;
+	size = 0;
+}
+
 Attribute::Attribute(string n, string t, bool k){ 
 	name = n;
 	type = t;
@@ -26,6 +33,10 @@ string Attribute::getName(){
 	return name; 
 }
 
+void Attribute::setName(string s){ 
+	name = s;
+}
+
 string Attribute::getType(){ 
 	return type; 
 }
@@ -34,7 +45,7 @@ bool Attribute::isKey(){
 	return key; 
 }
 
-void Attribute::setName(string s){
+void Attribute::rename(string s){
 	name = s;
 }
 

Attribute.h

@@ -11,14 +11,16 @@ class Attribute{
 	int size;
 	
 public:
+	Attribute();
 	Attribute(string n, string t, bool k);
 	void addCell(string v);
 	string operator[](int i);
 	vector<string> getValues();
 	string getName();
+	void setName(string s);
 	string getType();
 	bool isKey();
 	int getSize();
-	void setName(string s);
+	void rename(string s);
 	void display();
 };

DBEngine.cpp

@@ -59,12 +59,26 @@ Relation DBEngine::projection(vector<string> input, Relation r){
 		//if(r[i].getName == input[])
 //	}
 }
-/*
-void renameAttribute(vector<Attribute> v, string o, string s){
-	for(int i = 0; i < v.size(); ++i){
-		if(v[i].getName() == o){
-			v[i].setName(s);
+
+//ASAP: TEST ALL OF THIS
+void rename(Relation r, vector<string> oldnames, vector<string> newnames){
+	if (oldnames.size() != newnames.size()) {
+		cout << "Failure to rename: number of attributes do not match.";
+		return;
+	}
+	
+	else if (oldnames != r.getAttributeNames()) {
+		cout << "Failure to rename: the attributes to be renamed do not exist in the relation.";
+		return;
+	}
+	
+	else {
+		Attribute temp;
+		
+		for(int i = 0; i < oldnames.size(); ++i){
+			temp = r.getAttributeByName(oldnames[i]);
+			temp.setName(newnames[i]);
 		}
 	}
 }
-*/
+

DBEngine.h

@@ -19,9 +19,9 @@ public:
 	void saveToFile(vector<string> cmds);
 	
 	//operations
-	//void selection();
+	//Relation selection();
 	Relation projection(vector<string> input, Relation r);
-	//void renaming();
+	void rename(Relation r, vector<string> oldnames, vector<string> newnames);
 	//void setUnion();
 	//void setDiff();
 	//void crossProduct();

Relation.cpp

@@ -29,6 +29,16 @@ vector<string> Relation::getAttributeNames(){
 	return temp; 
 }
 
+Attribute Relation::getAttributeByName(string s) {
+	for(int i = 0; i < size; ++i){
+		if (att[i].getName() == s) {
+			return att[i];
+		}
+	}
+	
+	cout << "Failure to return: the requested attribute does not exist.";
+}
+
 int Relation::getSize(){ 
 	return size; 
 }	
@@ -42,3 +52,37 @@ void Relation::display(){
 	
 	cout << "--------------------------\n";
 }
+
+void Relation::insertTuple(vector<string> tuple){
+	if (tuple.size() != this->size) {
+		cout << "Failure to insert: the sizes do not match.";
+	}
+	
+	else {
+		for (int i = 0; i < att.size(); ++i) {
+			att[i].addCell(tuple[i]);
+		}
+	}
+}
+
+void Relation::insertFromRelation(Relation r){
+	if (r.size != this->size) {
+		cout << "Failure to insert: the sizes do not match.";
+		return;
+	}
+	
+	else if (this->getAttributeNames() != r.getAttributeNames()) {
+		cout << "Failure to insert: the attributes do not match.";
+		return;
+	}
+	
+	else {
+		vector<Attribute> newAtts = r.getAttributes();
+		
+		for (int i = 0; i < newAtts.size(); ++i) {
+			for (int j = 0; j < newAtts[i].getSize(); ++j) {
+				this->att[i].addCell(newAtts[i][j]);
+			}
+		}
+	}
+}

Relation.h

@@ -13,6 +13,10 @@ public:
 	string getTableName();
 	vector<Attribute> getAttributes();
 	vector<string> getAttributeNames();
+	Attribute getAttributeByName(string s);
 	int getSize();
 	void display();
+	void insertTuple(vector<string> tuple); //we are assuming they are in order
+	void insertFromRelation(Relation r);
+	//void removeTuple();
 };

test.cpp

@@ -26,19 +26,26 @@ int main() {
 	v.push_back(att2);
 	v.push_back(att3);
 	
-	Relation r("AltFood", v);
-	//r.display();
+	Relation r("Food", v);
 	
-	engine.createTable("Food", v);
-	engine.createTable(r);
-	engine.createTable("Sadness");
-	//vector<Relation> rs = engine.getRelations();
-	Relation r2 = engine.getTableFromName("Food");
-	r2.display();
+	vector<string> tuple;
+	tuple.push_back("Omelette");
+	tuple.push_back("Fried Rice");
+	tuple.push_back("Grouper");
 	
-	vector<string> v1 = r2.getAttributeNames();
+	r.insertTuple(tuple);
+	r.display();
 	
-	for (int i = 0; i < v.size(); ++i){
-		cout << v1[i];
-	}
+	vector<string> o;
+	vector<string> n;
+	
+	o.push_back("Breakfast");
+	o.push_back("Lunch");
+	o.push_back("Dinner");
+	
+	n.push_back("Tsafkaerb");
+	n.push_back("Hcnul");
+	n.push_back("Rennid");
+	
+	//engine.rename(r, o, n);
 }