/// <summary>Gets the value of the specified property on the specified object.</summary>
/// <typeparam name="T">The type of the property value.</typeparam>
/// <param name="propertyName">The name of the property to get the value for.</param>
/// <param name="value">The object to get value from.</param>
/// <param name="propertyValue">The value of the property if it exists; otherwise, <c>default(T)</c>.</param>
/// <returns><c>true</c> if the property value of the specified type could be retrieved; otherwise, <c>false</c>.</returns>
public virtual bool TryGetPropertyValue <T>(string propertyName, object value, out T propertyValue)
{
propertyValue = default(T);
object uncastPropertyValue;
if (!this.TryGetPropertyValue(propertyName, value, out uncastPropertyValue))
{
return(false);
}
return(FilterUtilities.TryCastItem <T>(uncastPropertyValue, out propertyValue));
}
/// <summary>
/// Determines if item matches a derived classes criteria.
/// </summary>
/// <param name="item">
/// The item to match evaluate.
/// </param>
/// <returns>
/// Returns true if the item matches, false otherwise.
/// </returns>
public override bool Evaluate(object item)
{
if (item == null)
{
return(this.DefaultNullValueEvaluation);
}
if (!this.IsValid)
{
return(false);
}
T castItem;
if (!FilterUtilities.TryCastItem <T>(item, out castItem))
{
return(false);
}
return(this.Evaluate(castItem));
}