//and
public TemporalExpression And(TemporalExpression expr)
{
if (this.GetType() == typeof(TEIntersect))
{
((TEIntersect)this).Add(expr);
return this;
}
else
{
TEIntersect intersect = new TEIntersect();
intersect.Add(this);
intersect.Add(expr);
return intersect;
}
}
public TEDifference(TemporalExpression exprA, TemporalExpression exprB)
{
this.ExpressionA = exprA;
this.ExpressionB = exprB;
}
/// <summary>
/// Adds a temporal expression to the list
/// </summary>
/// <param name="expr">Temporal expression to add.</param>
public void Add(TemporalExpression expr)
{
this.Expressions.Add(expr);
}
//minus
public TemporalExpression Minus(TemporalExpression expr)
{
return new TEDifference(this, expr);
}
//Or
public TemporalExpression Or(TemporalExpression expr)
{
if (this.GetType() == typeof(TEUnion))
{
((TEUnion)this).Add(expr);
return this;
}
else
{
TEUnion union = new TEUnion();
union.Add(this);
union.Add(expr);
return union;
}
}
