public static string GetODataQueryOperatorString(this FilterExpressionOperator oDataQueryOperator)
{
string result;
if (FilterExpressionOperatorToODataQueryOperatorString.TryGetValue(oDataQueryOperator, out result) == false)
{
throw new ArgumentException(String.Format("No ODataQuery operator name defined for '{0}'.", oDataQueryOperator));
}
return(result);
}
public static ExpressionType GetDotNetExpressionType(this FilterExpressionOperator filterExpressionOperator)
{
ExpressionType expressionType;
if (FilterExpressionOperatorToDotNetExpressionType.TryGetValue(filterExpressionOperator, out expressionType) == false)
{
throw new ArgumentException(String.Format("No .NET ExpressionType defined for '{0}'.", filterExpressionOperator));
}
return(expressionType);
}
public UnaryFilterExpression(FilterExpressionOperator op, FilterExpression operand)
{
if (op == FilterExpressionOperator.Unknown)
{
throw new ArgumentException("Cannot create UnaryFilterExpression with operator type 'Unknown'.");
}
if (operand == null)
{
throw new ArgumentNullException("operand", "Operand cannot be null.");
}
Operator = op;
Operand = operand;
}
public BinaryFilterExpression(FilterExpression left, FilterExpressionOperator op, FilterExpression right)
{
if (left == null)
{
throw new ArgumentNullException("left", "Left operand of a binary expression cannot be null.");
}
if (right == null)
{
throw new ArgumentNullException("right", "Right operand of a binary expression cannot be null.");
}
if (op == FilterExpressionOperator.Unknown)
{
throw new ArgumentException("Cannot create binary expression with the 'Unknown' operator.", "op");
}
Left = left;
Operator = op;
Right = right;
}
public static UnaryFilterExpression Unary(FilterExpressionOperator op, FilterExpression operand)
{
return(new UnaryFilterExpression(op, operand));
}
public static BinaryFilterExpression Binary(FilterExpression left, FilterExpressionOperator op, FilterExpression right)
{
return(new BinaryFilterExpression(left, op, right));
}
public static bool IsBinaryOperator(this FilterExpressionOperator filterExpressionOperator)
{
return((filterExpressionOperator.IsUnaryOperator() == false) && (filterExpressionOperator != FilterExpressionOperator.Unknown));
}
public static bool IsUnaryOperator(this FilterExpressionOperator filterExpressionOperator)
{
return((filterExpressionOperator == FilterExpressionOperator.Not) || (filterExpressionOperator == FilterExpressionOperator.Negate));
}
protected QueryFilterExpression(FilterExpressionOperator theOperator, InventoryPropertyName propertyName, T parameter)
{
Operator = theOperator;
PropertyName = propertyName;
Parameter = parameter;
}
