public static bool IsSubsetOf(this ISelectionCondition me, ISelectionCondition other)
{
//x cond y
//If equality -> x1 == x2 && y1 == y2
//etc.
var mex = me.Expression as BinaryExpression;
var otherx = other.Expression as BinaryExpression;
if (mex == null || otherx == null)
return false;
var x1 = mex.Left as ConstantExpression;
var y1 = mex.Right as ConstantExpression;
var x2 = otherx.Left as ConstantExpression;
var y2 = otherx.Right as ConstantExpression;
if ((x1 == null && y1 == null) || (x2 == null && y2 == null))
return false; //At least one part of the expression should be constant.
if ((x1 != null && y1 != null) || (x2 != null && y2 != null))
return false; //At least one part of the expression should be non-constant.
var var1 = x1 == null ? mex.Left.ToString() : mex.Right.ToString();
var var2 = x2 == null ? otherx.Left.ToString() : otherx.Right.ToString();
var con1 = x1 == null ? y1.Value : x1.Value;
var con2 = x2 == null ? y2.Value : x2.Value;
var op1 = x1 == null ? me.Expression.NodeType : Inverse(me.Expression.NodeType);
var op2 = x2 == null ? other.Expression.NodeType : Inverse(other.Expression.NodeType);
switch (op1)
{
case ExpressionType.Equal:
return var1 == var2 && con1 == con2;
case ExpressionType.GreaterThanOrEqual:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) >= 1);
case ExpressionType.LessThanOrEqual:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) <= 1);
case ExpressionType.GreaterThan:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) > 1);
case ExpressionType.LessThan:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) < 1);
default: //Unsupported operation
return false;
}
}
public static bool IsSubsetOf(this ISelectionCondition me, ISelectionCondition other)
{
//x cond y
//If equality -> x1 == x2 && y1 == y2
//etc.
var mex = me.Expression as BinaryExpression;
var otherx = other.Expression as BinaryExpression;
if (mex == null || otherx == null)
return false;
var x1 = mex.Left as ConstantExpression;
var y1 = mex.Right as ConstantExpression;
var x2 = otherx.Left as ConstantExpression;
var y2 = otherx.Right as ConstantExpression;
if ((x1 == null && y1 == null) || (x2 == null && y2 == null))
return false; //At least one part of the expression should be constant.
if ((x1 != null && y1 != null) || (x2 != null && y2 != null))
return false; //At least one part of the expression should be non-constant.
var var1 = x1 == null ? mex.Left.ToString() : mex.Right.ToString();
var var2 = x2 == null ? otherx.Left.ToString() : otherx.Right.ToString();
var con1 = x1 == null ? y1.Value : x1.Value;
var con2 = x2 == null ? y2.Value : x2.Value;
var op1 = x1 == null ? me.Expression.NodeType : Inverse(me.Expression.NodeType);
var op2 = x2 == null ? other.Expression.NodeType : Inverse(other.Expression.NodeType);
switch (op1)
{
case ExpressionType.Equal:
return var1 == var2 && con1 == con2;
case ExpressionType.GreaterThanOrEqual:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) >= 1);
case ExpressionType.LessThanOrEqual:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) <= 1);
case ExpressionType.GreaterThan:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) > 1);
case ExpressionType.LessThan:
return var1 == var2 &&
(op1 == op2) &&
con1 is IComparable &&
(((IComparable)con1).CompareTo(con2) < 1);
default: //Unsupported operation
return false;
}
}
public static bool DoesIntersect(this ISelectionCondition me, ISelectionCondition other)
{
return IsSubsetOf(me, other);
}
public static bool DoesIntersect(this ISelectionCondition me, ISelectionCondition other)
{
return IsSubsetOf(me, other);
}