/// <summary>
/// Update right hand side of the assignment expression
/// </summary>
/// <param name="subExps"></param>
/// <param name="curPos"></param>
/// <param name="vi"></param>
/// <returns></returns>
private int UpdateAssignmentExpRightHand(List <Expression> subExps, int curPos, VariableDeclaration vi, bool IsFieldUpdate)
{
//update if vi is a local variable
if (vi != null)
{
//vi.IsModified = true;
//vi.IsFieldChange = IsFieldUpdate;
// check keyword new after equal =
if (curPos < subExps.Count())
{
var oUse = subExps.ElementAt(curPos) as OperatorUse;
if (oUse != null && oUse.Text == "new")
{
//vi.IsInstantiated = true;
curPos++;
}
}
HashSet <VariableDeclaration> AssigningVars = new HashSet <VariableDeclaration>();
Statement curStmt = null;
//Analyze the assignment values
while (curPos <= subExps.Count() - 1)
{
var varUse = FindAndUpdateNextVarUse(subExps, curPos, out curPos, true);
curStmt = subExps[curPos - 1].ParentStatement;
//handle method call args
if (this.HasMethodCallOnRight == true)
{
HasMethodCallOnRight = false;
AssigningVars.UnionWith(this.ArgVarAssigning);
ArgVarAssigning.Clear();
HasMethodCallOnRight = false;
}
//end handle method call args
VariableDeclaration vd = FindFieldVarDecl(varUse);
if (vd != null)
{
//vi.AssignedFields.Add(vd);
//get vd
AssigningVars.Add(vd);
}
var lVarInfo = FindLocalVarInfo(varUse);
if (lVarInfo != null)
{
foreach (var feild in lVarInfo.AssignedFields)
{
//vi.AssignedFields.Add(feild);
}
//get vd
AssigningVars.Add(lVarInfo.Variable);
}
var pVarInfo = FindParaVarInfo(varUse);
if (pVarInfo != null)
{
foreach (var feild in pVarInfo.AssignedFields)
{
//vi.AssignedFields.Add(feild);
}
//get vd
AssigningVars.Add(pVarInfo.Variable);
}
}
if (AssigningVars.Count > 0 && curStmt != null)
{
VAssignmentManager.AddNewRelations(vi, AssigningVars, curStmt);
}
}
return(curPos);
}
/// <summary>
/// update info based on the expression
/// </summary>
/// <param name="exp"></param>
public void UpdateByExpression(Expression exp)
{
if (exp is VariableDeclaration)
{
//variable declaration expression
var vdExp = (VariableDeclaration)exp;
VariableInfo vi = new VariableInfo(vdExp);
VariablesInfo.Add(vi);
//update if it contains assignment
if (vdExp.Initializer != null)
{
var subExps = new List <Expression>();
if (vdExp.Initializer.Components.Count == 0)
{
subExps.Add(vdExp.Initializer);
}
else
{
subExps = vdExp.Initializer.Components.ToList();
}
UpdateAssignmentExpRightHand(subExps, 0, vi.Variable, false);
//TO DO: ex. = new school()
}
else
{
//Special process, since Linq is not in Srcml.net
if (vdExp.Location.EndingLineNumber - vdExp.Location.StartingLineNumber > 1)
{
var assignedVar = vdExp;
HashSet <VariableDeclaration> AssigningVars = new HashSet <VariableDeclaration>();
Statement stmt = vdExp.ParentStatement;
var assigningVar = this.VAssignmentManager.FindMostComplecatedVD();
if (assigningVar != null)
{
AssigningVars.Add(assigningVar);
}
if (AssigningVars.Count > 0 && stmt != null)
{
VAssignmentManager.AddNewRelations(assignedVar, AssigningVars, stmt);
}
}
}
}
else if (exp is MethodCall)
{
//Method call expression
var mcExp = (MethodCall)exp;
UpdateMethodCall(mcExp);
}
else
{
//Update the expression
var subExps = exp.Components.ToList();
int curPos = 0;
// Checks keyword new
if (subExps.Count > 0)
{
var oUse = subExps.ElementAt(0) as OperatorUse;
if (oUse != null && oUse.Text == "new")
{
if (InReturnStmt > 0)
{
IsReturnNewObj = true;
}
curPos++;
}
}
UpdateByExpToTheEnd(subExps, curPos);
}
}
