public void StartVisit(IOperatorNode operatorNode)
{
FilterDescriptor filterDescriptor = new FilterDescriptor
{
Operator = operatorNode.FilterOperator
};
CompositeFilterDescriptor compositeFilterDescriptor = CurrentDescriptor as CompositeFilterDescriptor;
if (compositeFilterDescriptor != null)
{
compositeFilterDescriptor.FilterDescriptors.Add(filterDescriptor);
}
context.Push(filterDescriptor);
}
private static bool TypesAreDifferent(FilterDescriptor descriptor, Expression memberExpression, Expression valueExpression)
{
bool isEqualityOperator = descriptor.Operator == FilterOperator.IsEqualTo ||
descriptor.Operator == FilterOperator.IsNotEqualTo;
return isEqualityOperator && !memberExpression.Type.IsValueType && !valueExpression.Type.IsValueType;
}
public FilterDescriptorExpressionBuilder(ParameterExpression parameterExpression, FilterDescriptor descriptor)
: base(parameterExpression)
{
this.descriptor = descriptor;
}
/// <summary>
/// Determines whether the specified <paramref name="other"/> descriptor
/// is equal to the current one.
/// </summary>
/// <param name="other">The other filter descriptor.</param>
/// <returns>
/// True if all members of the current descriptor are
/// equal to the ones of <paramref name="other"/>, otherwise false.
/// </returns>
public virtual bool Equals(FilterDescriptor other)
{
if (ReferenceEquals(null, other))
{
return false;
}
if (ReferenceEquals(this, other))
{
return true;
}
return
Equals(other.Operator, this.Operator) &&
Equals(other.Member, this.Member) &&
Equals(other.Value, this.Value);
}
