/// <summary>
/// Returns the hashcode for this <see cref="QueryGroup"/>.
/// </summary>
/// <returns>The hashcode value.</returns>
public override int GetHashCode()
{
// Make sure to check if this is already taken
if (!ReferenceEquals(null, m_hashCode))
{
return(m_hashCode.Value);
}
// Set the default value (should not be nullable for better performance)
var hashCode = 0;
// Iterates the child query field
if (!ReferenceEquals(null, QueryFields))
{
foreach (var queryField in QueryFields)
{
hashCode += queryField.GetHashCode();
}
}
// Iterates the child query groups
if (!ReferenceEquals(null, QueryGroups))
{
foreach (var queryGroup in QueryGroups)
{
hashCode += queryGroup.GetHashCode();
}
}
// Set with conjunction
hashCode += Conjunction.GetHashCode();
// Set back the hashcode value
m_hashCode = hashCode;
// Return the actual hash code
return(hashCode);
}