/// <summary>
/// Clones the expression
/// </summary>
/// <returns></returns>
protected virtual OqlExpression Clone()
{
OqlExpression exp = new OqlExpression(this.line, this.col);
exp.children = children;
exp.op = op;
exp.unaryOp = unaryOp;
exp.value = value;
return(exp);
}
/// <summary>
/// Adds a child expression and an operator
/// </summary>
/// <param name="exp"></param>
/// <param name="op"></param>
public virtual void Add(OqlExpression exp, string op)
{
System.Diagnostics.Debug.Assert(this.children.Count > 0);
if (this.Children.Count < 2)
{
this.children.Add(exp);
this.op = op;
}
else if (this.op == op)
{
this.children.Add(exp);
}
else
{
OqlExpression left = this.Clone();
this.children.Clear();
this.children.Add(left);
this.op = op;
this.children.Add(exp);
}
}
//public List<object> Serialize()
//{
// List<object> list = new List<object>();
// Serialize(list);
//}
//private void Serialize(List<object> list)
//{
// if (this.IsTerminating)
// {
// list.Add(this);
// }
// else
// {
// if (this.hasBrackets)
// list.Add("(");
// if (this.unaryOp != null)
// list.Add(this.unaryOp);
// }
//}
///<inheritdoc/>
public override string ToString()
{
StringBuilder sb = new StringBuilder();
if (hasBrackets)
{
sb.Append('(');
}
if (unaryOp != null)
{
sb.Append(unaryOp);
sb.Append(' ');
}
if (ExpressionType == Expressions.ExpressionType.Raw && value != null)
{
sb.Append(this.value.ToString());
if (!IsTerminating)
{
sb.Append(' ');
}
}
else if (this.IsTerminating)
{
if (this.value is Double)
{
sb.Append(((Double)this.value).ToString(CultureInfo.InvariantCulture));
}
else
if (value != null)
{
sb.Append(this.value.ToString());
}
}
if (!this.IsTerminating)
{
string op1 = op;
for (int i = 0; i < children.Count; i++)
{
OqlExpression child = this.children[i];
sb.Append(child.ToString());
if (i < children.Count - 1)
{
if (!String.IsNullOrEmpty(op))
{
if (op != ",")
{
sb.Append(' ');
}
sb.Append(op1);
if (op1 == "BETWEEN")
{
op1 = "AND";
}
sb.Append(' ');
}
else
{
sb.Append(' ');
}
}
}
}
if (hasBrackets)
{
sb.Append(')');
}
return(sb.ToString());
}
/// <summary>
/// Adds a child expressoin
/// </summary>
/// <param name="exp"></param>
public virtual void Add(OqlExpression exp)
{
this.children.Add(exp);
}
/// <summary>
/// </summary>
/// <param name="exp"></param>
/// <remarks>
/// Since there occurs a lot of shuffling around the children during the parse process
/// we itererate through the tree after parsing and set the parent there.
/// </remarks>
void IManageExpression.SetParent(OqlExpression exp)
{
this.parent = exp;
}
