public VariableBinOpField(Method method, Primitives primitive)
{
Random rand = new Random();
int option = rand.Next(100) % 2;
int nested = 0;
switch (option)
{
case 0: //var binOp field
nested = rand.Next(100);
if (nested < method.AssociatedClass.Percent)
{
leftOprnd = new VariableBinOpField(method, primitive);
binOp = new BinaryOperator(primitive);
rightOprnd = new VariableBinOpField(method, primitive);
}
else
{
leftOprnd = VariableGenerator.getRandomizedVariable(method, primitive);
binOp = new BinaryOperator(primitive);
rightOprnd = FieldGenerator.getRandomField(method.AssociatedClass, primitive, method.Static);
}
break;
case 1: // field binOp var
nested = rand.Next(100);
if (nested < method.AssociatedClass.Percent)
{
leftOprnd = new VariableBinOpField(method, primitive);
binOp = new BinaryOperator(primitive);
rightOprnd = new VariableBinOpField(method, primitive);
}
else
{
leftOprnd = VariableGenerator.getRandomizedVariable(method, primitive);
binOp = new BinaryOperator(primitive);
rightOprnd = FieldGenerator.getRandomField(method.AssociatedClass, primitive, method.Static);
}
break;
}
// for division and modulo operations, keeping only literals in the right expr.
// i5%i3 => i5%constantValue OR f2/f4 => f2/constantValue
if (binOp.ToString().Equals("/") || binOp.ToString().Equals("%"))
{
do
{ //FIXME: only handles int for now.
rightOprnd = new Literal(primitive);
}while (rightOprnd.ToString().Contains("(0)")); //avoiding divide by (0)
}
}
public FieldBinOpField(Method method, Primitives primitive)
{
Random rand = new Random();
int nested = rand.Next(100);
//nested expression
if (nested < method.AssociatedClass.Percent)
{
leftOprnd = new FieldBinOpField(method, primitive);
binOp = new BinaryOperator(primitive);
rightOprnd = new FieldBinOpField(method, primitive);
}
else
{
leftOprnd = FieldGenerator.getRandomField(method.AssociatedClass, primitive, method.Static);
binOp = new BinaryOperator(primitive);
rightOprnd = FieldGenerator.getRandomField(method.AssociatedClass, primitive, method.Static);
}
// removing expressions of the form: (i5-i5) to avoid {i19%(i5-i5)}expr.
if (leftOprnd.ToString().Equals(rightOprnd.ToString()))
{
rightOprnd = new Literal(primitive);
}
// for division and modulo operations, keeping only literals in the right expr.
// i5%i3 => i5%constantValue OR f2/f4 => f2/constantValue
if (binOp.ToString().Equals("/") || binOp.ToString().Equals("%"))
{
do
{ //FIXME: only handles int for now.
rightOprnd = new Literal(primitive);
}while (rightOprnd.ToString().Contains("(0)")); //avoiding divide by (0)
}
}
public AssignmentExpression(Method method)
{
Random rand = new Random();
//should we use field or variable?
int OptionVarOrField = rand.Next(100) % 2;
if (OptionVarOrField == 0)
{
// Introducing any variable
lhs = VariableGenerator.getRandomizedVariable(method);
}
else
{
//Introducing any field
lhs = FieldGenerator.getRandomField(method.AssociatedClass, method.Static);
if (lhs == null)
{
//if no field is present, introduce variable
lhs = VariableGenerator.getRandomizedVariable(method);
}
}
// if no variable is present, just use print statements
if (lhs == null)
{
output += (new PrintStatement(method)).ToString();
return;
}
Primitives primitive = lhs.type.getType();
//If the primitive is an object, invoke constructor
if (primitive == Primitives.OBJECT)
{
output += lhs + " = new " + ProgGenUtil.getClassToConstruct(lhs.Type.ToString(), method.ClassList) + "();\n";
return;
}
//Randomly choose to nest operation or not
int option = rand.Next(100);
if (option > method.AssociatedClass.Percent)
{
leftExpr = new NormalExpression(method, primitive);
rightExpr = new NormalExpression(method, primitive);
Operator binOp = new BinaryOperator(primitive);
// Removing variable from right expr. if binOp is / or %
// i6=(i3/2)%(i3-5) => i6=(i3/2)%constant
//if (binOp.ToString().Equals("/") || binOp.ToString().Equals("%"))
//{
// do
// { //FIXME: only handles int for now.
// rightExpr = new Literal(primitive,Int32.MaxValue);
// }while (rightExpr.ToString().Contains("(0)")); //avoiding divide by (0)
//}
output += lhs + " = (" + lhs.Type + ")(" + leftExpr + binOp.ToString() + rightExpr + ");\n";
}
else
{
if (ProgGenUtil.useQueries)
{
if (ProgGenUtil.coinFlip())
{
expr = new NormalExpression(method, primitive);
//we don't want assignments statements like this: i8 = i8
while (lhs.Equals(expr.ToString()))
{
expr = new NormalExpression(method, lhs.type.getType());
}
output += lhs + " = (" + lhs.Type + ")" + expr.ToString() + ";\n";
}
else
{
Console.WriteLine("Trying to fetch literal from database for : " + lhs.Type);
StringBuilder builder = new StringBuilder();
Query query = getQueryForType(primitive);
if (query == null)
{
//no query results
output += lhs + " = (" + lhs.Type + ")" + new Literal(primitive, Int32.MaxValue) + ";\n";
return;
}
builder.Append("try{");
builder.Append("ResultSet rs = DBUtil.getDBUtil().executeQuery(");
builder.Append("\"" + query.QueryString + "\"");
builder.Append(");\n");
builder.Append("rs.last();\n");
builder.Append("int rowToSelect = new Random().nextInt(rs.getRow());\n");
builder.Append("rs.first();\n");
builder.Append("for(int rowToSelectCounter=0; rowToSelectCounter<rowToSelect;rowToSelectCounter++)");
builder.Append("{ rs.next(); }\n");
List <QueryResult> queryResultsForType = getColumnNumbersForType(query, primitive);
if (queryResultsForType.Count == 0)
{
//no query results present for expected type.
output += lhs + " = (" + lhs.Type + ")" + new Literal(primitive, Int32.MaxValue) + ";\n";
return;
}
int resultToSelect = (new Random()).Next(queryResultsForType.Count);
QueryResult selectedResult = queryResultsForType[resultToSelect];
string result = getValueFromResultSet(primitive, selectedResult);
if (result == null)
{
output += lhs + " = (" + lhs.Type + ")" + new Literal(primitive, Int32.MaxValue) + ";\n";
return;
}
builder.Append(lhs + " = (" + lhs.Type + ")" + result + "\n\n");
builder.Append("} catch(Exception e) { e.printStackTrace(); }\n\n");
builder.Append("Console.WriteLine(" + lhs + ");\n");
output += builder.ToString();
}
}
else
{
expr = new NormalExpression(method, primitive);
//we don't want assignments statements like this: i8 = i8
while (lhs.Equals(expr.ToString()))
{
expr = new NormalExpression(method, lhs.type.getType());
}
output += lhs + " = (" + lhs.Type + ")" + expr.ToString() + ";\n";
}
}
}