private static Condition internal_buildCondition(string modifier1, Name v1, string modifier2, Name v2, ComparisonOperator op)
{
IValueRetriver value1 = ConvertToValueRetriever(modifier1, v1);
IValueRetriver value2 = ConvertToValueRetriever(modifier2, v2);
if (value1.Equals(value2))
{
throw new InvalidOperationException("Both given property names are intrinsically equal. Condition would always return a constant result.");
}
if (value1.InnerName.IsPrimitive && value2.InnerName.IsPrimitive && !value1.HasModifier && !value2.HasModifier)
{
throw new InvalidOperationException("Both given property names are primitive values. Expected at least one non-primitive value.");
}
if (op == ComparisonOperator.Equal)
{
//May be a definition
if (value1.InnerName.IsVariable && !value1.HasModifier)
{
return(new EqualityDefinitionCondition(v1, value2));
}
if (value2.InnerName.IsVariable && !value2.HasModifier)
{
return(new EqualityDefinitionCondition(v2, value1));
}
}
if (value1.InnerName.IsPrimitive != value2.InnerName.IsPrimitive)
{
IValueRetriver prop = value1.InnerName.IsPrimitive ? value2 : value1;
PrimitiveValue value = (value1.InnerName.IsPrimitive ? value1.InnerName : value2.InnerName).GetPrimitiveValue();
op = v1.IsPrimitive ? op.Mirror() : op;
if (value.TypeCode == TypeCode.Boolean)
{
switch (op)
{
case ComparisonOperator.Equal:
return(new PredicateCondition(prop, value));
case ComparisonOperator.NotEqual:
return(new PredicateCondition(prop, !value));
}
}
return(new PrimitiveComparisonCondition(prop, value, op));
}
return(new PropertyComparisonCondition(value1, value2, op));
}
public EqualityDefinitionCondition(Name variable, IValueRetriver other)
{
m_variable = variable;
m_other = other;
}
public PropertyComparisonCondition(IValueRetriver property1, IValueRetriver property2, ComparisonOperator op)
{
Property1 = property1;
Property2 = property2;
Operator = op;
}
public PropertyComparisonCondition(IValueRetriver property1, IValueRetriver property2, ComparisonOperator op)
{
Property1 = property1;
Property2 = property2;
Operator = op;
}
public EqualityDefinitionCondition(Name variable, IValueRetriver other)
{
m_variable = variable;
m_other = other;
}
public PredicateCondition(IValueRetriver p, bool expectedResult)
{
m_predicate = p;
m_invert = !expectedResult;
}
public PrimitiveComparisonCondition(IValueRetriver prop, PrimitiveValue value, ComparisonOperator op)
{
m_retriver = prop;
m_value = value;
m_operation = op;
}