/// <summary>
/// Adds a boolean condition to the SearchCondition with an "OR" operator.
/// If the SearchCondition is empty the "OR" operator is not added.
/// </summary>
/// <param name="subCondition">Sub-condition to be added to the SearchCondition.
/// <b>Null</b> and empty search conditions are not allowed.</param>
public void Or(SearchCondition subCondition)
{
if (subCondition == null || subCondition.IsEmpty)
throw new ArgumentNullException("subCondition", Messages.SearchCondition_SubConditionMayNotBeNull);
if (!this.IsEmpty)
this.predicateExpression.Add(ConditionOperator.Or);
this.predicateExpression.Add(subCondition);
}
/// <summary>
/// Indicates whether the specified search condition is empty or a <n>null</n> reference.
/// </summary>
/// <param name="value">A <see cref="SearchCondition"/> reference.</param>
/// <returns><b>true</b> if the value parameter is empty or a <n>null</n> reference; otherwise, <b>false</b>.</returns>
public static bool IsNullOrEmpty(SearchCondition value)
{
bool isNullOrEmpty = (value == null) || (value.IsEmpty);
return isNullOrEmpty;
}
/// <summary>
/// Adds a boolean condition to the SearchCondition.
/// If the SearchCondition is not empty then the expression is added with an "AND" operator.
/// Essentially, same as <see cref="And(SearchCondition)"/>.
/// </summary>
/// <param name="subCondition">Sub-condition to be added to the SearchCondition.
/// <b>Null</b> and empty search conditions are not allowed.</param>
public void Add(SearchCondition subCondition)
{
And(subCondition);
}