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Merge branch 'master' of https://github.tamu.edu/scho4077/DMS

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This commit is contained in:
Rebecca Schofield 2015-09-23 16:35:46 -05:00
commit c846e72eb8
2 changed files with 553 additions and 64 deletions
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188
Parserv3.h
View file

@ -11,38 +11,63 @@ class Relation
{
string name;
Relation(string str)
{
name = str;
}
void setRelation(string str)
{
name = str;
}
string getName()
{
return name;
}
public:
Relation()
{
}
Relation(string str)
{
name = str;
}
void setRelation(string str)
{
name = str;
}
string getName()
{
return name;
}
};
class Attribute
{
string name;
public:
Attribute(string str)
{
name = str;
}
void setAttribute(string str)
{
name = str;
}
string getAttribute()
{
return name;
}
};
class Union
{
string Un1;
string Un2;
Union (string s1, string s2)
{
Un1 = s1;
Un2 = s2;
}
string getUnion()
{
return "Union of " + Un1 + " and " + Un2;
}
public:
Union (string s1, string s2)
{
Un1 = s1;
Un2 = s2;
}
string getUnion()
{
return "Union of " + Un1 + " and " + Un2;
}
};
class Product
@ -50,16 +75,17 @@ class Product
string Pr1;
string Pr2;
Product(string s1, string s2)
{
Pr1 = s1;
Pr2 = s2;
}
string getProduct()
{
return "Product of " + Pr1 + " and " + Pr2;
}
public:
Product(string s1, string s2)
{
Pr1 = s1;
Pr2 = s2;
}
string getProduct()
{
return "Product of " + Pr1 + " and " + Pr2;
}
};
class Difference
@ -67,16 +93,17 @@ class Difference
string D1;
string D2;
Difference(string s1, string s2)
{
D1 = s1;
D2 = s2;
}
string getDifference()
{
return "Difference of " + D1 + " and " + D2;
}
public:
Difference(string s1, string s2)
{
D1 = s1;
D2 = s2;
}
string getDifference()
{
return "Difference of " + D1 + " and " + D2;
}
};
class Renaming
@ -84,16 +111,17 @@ class Renaming
string newName;
string oldName;
Renaming(string s1, string s2)
{
newName = s1;
oldName = s2;
}
string doRename()
{
return "Renaming " + oldName + " to " + newName;
}
public:
Renaming(string s1, string s2)
{
newName = s1;
oldName = s2;
}
string doRename()
{
return "Renaming " + oldName + " to " + newName;
}
};
class Projection
@ -101,16 +129,17 @@ class Projection
string newName;
string oldName;
Projection(string s1, string s2)
{
newName = s1;
oldName = s2;
}
string doProjection()
{
return "Projecting " + oldName + " onto " + newName;
}
public:
Projection(string s1, string s2)
{
newName = s1;
oldName = s2;
}
string doProjection()
{
return "Projecting " + oldName + " onto " + newName;
}
};
class Operand
@ -216,6 +245,11 @@ class Condition
{
string cond;
public:
Condition()
{
}
Condition(string str)
{
cond = str;
@ -246,3 +280,29 @@ class Selection
return select;
}
};
class Expression
{
string exp;
public:
Expression()
{
}
Expression(string str)
{
exp = str;
}
void setExpression(string str)
{
exp = str;
}
string getExpression()
{
return exp;
}
};

429
Parserv4.cpp Normal file
View file

@ -0,0 +1,429 @@
#include <string> // std::string
#include <iostream> // std::cout
#include <sstream> // std::stringstream
#include <vector>
#include <string>
#include "Parserv3.h"
using namespace std;
vector<string> tokenize(string ss)
{
string tempString;
stringstream lineStream(ss);
vector<string> output;
while (lineStream >> tempString)
{
output.push_back(tempString);
}
//testing---------------
cout<<"TokenList: ";
for (int i = 0; i <output.size(); ++i)
{
cout<<output[i]<<" ";
}
//----------------------
return output;
}
void displayTokenList(vector<string> input)
{
cout<<"TokenList: "<<endl;
for (int i = 0; i < input.size(); ++i)
{
cout<<input[i]<<endl;
}
}
vector<string> showCMD(vector<string> input)
{
if (input.size() > 3)
{
cout<<"Syntax error!"<<endl;
}
cout<<"\nPassing the following arguments to dbEngine: "<<endl;
cout<<"command :"<<input[0]<<endl;
cout<<"argument: "<<input[1]<<endl;
return input;
}
vector<string> saveCMD(vector<string> input)
{
if (input.size() > 3)
{
cout<<"Syntax error!"<<endl;
}
cout<<"\nPassing the following arguments to dbEngine: "<<endl;
cout<<"command :"<<input[0]<<endl;
cout<<"argument: "<<input[1]<<endl;
return input;
}
vector<string> closeCMD(vector<string> input)
{
if (input.size() > 3)
{
cout<<"Syntax error!"<<endl;
}
cout<<"\nPassing the following arguments to dbEngine: "<<endl;
cout<<"command :"<<input[0]<<endl;
cout<<"argument: "<<input[1]<<endl;
return input;
}
vector<string> openCMD(vector<string> input)
{
if (input.size() > 3)
{
cout<<"Syntax error!"<<endl;
}
cout<<"\nPassing the following arguments to dbEngine: "<<endl;
cout<<"command :"<<input[0]<<endl;
cout<<"argument: "<<input[1]<<endl;
return input;
}
vector<string> exitCMD(vector<string> input)
{
if (input[1] != ";")
{
cout<<"ERROR: missing semicolon!"<<endl;
}
if (input[0] != "EXIT") { cout<<"Wrong function/syntax error!"<<endl;}
cout<<"Passing command: "<<input[0]<<endl;
return input;
}
vector<string> createCMD(vector<string> input)
{
//relation name will be the first element of the vector of data returned by this function
if (input[0] == "CREATE" && input[1] == "TABLE")
{
input.erase(input.begin());
input.erase(input.begin());
Relation r;
r.setRelation(input[0]);
input.erase(input.begin());
if(input[0] == "(")
{
input.erase(input.begin());
vector <Expression> e1;
while(input[0] != ")") //inserting all values to relation
{
if (input[0] == ",")
{
input.erase(input.begin());
}
e1.push_back(input[0]);
input.erase(input.begin());
}
vector <Expression> e2;
if(input[0] == "PRIMARY" && input[1] == "KEY")
{
input.erase(input.begin());
input.erase(input.begin());
if(input[0] == "(")
{
while(input[0] != ")") //inserting all values to relation
{
if (input[0] == ",")
{
input.erase(input.begin());
}
e2.push_back(input[0]);
input.erase(input.begin());
}
cout << "Creating a table: " << r.getName() << "\n";
cout << "Primary key: ";
while(!e2.empty())
{
cout << e2[0].getExpression() << " ";
e2.erase(e2.begin());
}
return input;
}
}
}
else cout<<"Syntax error!"<<endl;
}
else cout<<"Syntax error!"<<endl;
}
vector<string> insertCMD(vector<string> input)
{
//relation name will be the first element of the vector of data returned by this function
if (input[0] == "INTO")
{
input.erase(input.begin());
Relation r(input[0]);
input.erase(input.begin());
if (input[0] == "VALUES" && input[1] == "FROM")
{
input.erase(input.begin());
input.erase(input.begin());
if(input[0] == "(")
{
vector <Expression> e;
input.erase(input.begin());
while(input[0] != ")") //inserting all values to relation
//for (int i = 0; i < 2; ++i)
{
if (input[0] == ",") input.erase(input.begin());
e.push_back(input[0]);
input.erase(input.begin());
}
cout << "Inserting: ";
while(!e.empty())
{
cout << e[0].getExpression() << " ";
e.erase(e.begin());
}
cout << "into " << r.getName() << ".\n";
return input;
}
else if (input[0] == "RELATION")
{
input.erase(input.begin());
Expression e;
while(input[0] != ";")
{
e.setExpression(e.getExpression() + input[0]);
}
cout << "Inserting: " << e.getExpression() << " into " << r.getName() << ".\n";
return input;
}
else cout<<"Syntax error!"<<endl;
}
cout<<"Syntax error!"<<endl;
}
else cout<<"Syntax error!"<<endl;
}
vector<string> updateCMD(vector<string> input)
{
//parse Relation r
//parse out SET
if(input[0] == "SET")
{
input.erase(input.begin());
Relation r(input[0]);
input.erase(input.begin());
//parse out ( and send everything until ) into an Expression vector
if(input[0] == "(")
{
vector <Expression> e;
input.erase(input.begin());
while(input[0] != ")")
{
e.push_back(input[0]);
}
}
if(input[0] == "WHERE")
{
Condition c;
while(input[0] != ";")
{
c.setCondition(/*c.getCondition +*/ input[0]);
}
}
}
else cout<<"Syntax error!"<<endl;
}
vector<string> deleteCMD(vector<string> input)
{
// parse out DELETE FROM
if (input[0] == "DELETE" && input[1] == "FROM")
{
input.erase(input.begin());
input.erase(input.begin());
Relation r(input[0]);
if(input[0] == "(")
{
vector <Expression> e;
input.erase(input.begin());
while(input[0] != ")")
{
if (input[0] == ",") input.erase(input.begin());
e.push_back(input[0]);
input.erase(input.begin());
}
cout << "Deleting: ";
while(!e.empty())
{
cout << e[0].getExpression() << " ";
e.erase(e.begin());
}
cout << "from " << r.getName() << ".\n";
return input;
}
else cout<<"Syntax error!"<<endl;
}
//parser relation name into Relation r
//parse out WHERE
//parse condition into Condition c
//cout "Deleting [c] from [r]"
//return input
}
void par_line(vector<string> input) //calls par_command() or par_query() depending on first item from token list
{
/*
• Match the first item in the token list and determine weather this is a command or a query.
• Call functions par_command() or par_query();
• After either par_command() or par_query() returns, make sure the line ends properly with “;” token
*/
string tempChar = input.back();
if (tempChar != ";")
{
cout<<"ERROR! missing semicolon "<<endl;
}
else
{
//command
// if ( input[0] == "open-cmd" || input[0] == "close-cmd" ||
// input[0] == "save-cmd" || input[0] == "exit-cmd" ||
// input[0] == "show-cmd" || input[0] == "create-cmd" ||
// input[0] == "update-cmd" || input[0] == "insert-cmd" ||
// input[0] == "delete-cmd" )
// {
// par_command(input[0]);
// }
//query
// if ( input[0] == "select" || input[0] == "project" ||
// input[0] == "product" || input[0] == "difference" ||
// input[0] == "union" || input[0] == "renaming" ||
// input[0] == "update-cmd" || input[0] == "insert-cmd" ||
// input[0] == "delete-cmd" )
// {
// par_query(input[0]);
// }
if ( input[0] == "INSERT")
{
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
input.erase(input.begin());
vector<string> insertInput = insertCMD(input);
cout<<"arguments: "<<endl;
displayTokenList(insertInput);
}
if ( input[0] == "CREATE")
{
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
input.erase(input.begin());
input.erase(input.begin());
vector<string> insertInput = insertCMD(input);
cout<<"arguments: "<<endl;
displayTokenList(insertInput);
}
if ( input[0] == "SHOW")
{
showCMD(input);
}
if ( input[0] == "EXIT")
{
exitCMD(input);
}
}
}
int main () {
string ss = "INSERT INTO animals VALUES FROM ( Joe , cat , 4 ) ;";
string ss2 = "SHOW Dogs ;";
string ss3 = "EXIT ; ";
vector<string> listOfTokens = tokenize(ss);
vector<string> listOfTokens2 = tokenize(ss2);
vector<string> listOfTokens3 = tokenize(ss3);
par_line(listOfTokens);
par_line(listOfTokens2);
par_line(listOfTokens3);
}