/// <summary>
/// Gets the values associated with the property. Can return null.
/// </summary>
/// <param name="property">
/// The property whose values are required.
/// </param>
/// <para>
/// The <see cref="Values"/> type is used to return values so that
/// helper methods like ToBool can be used to convert the response to
/// a boolean.
/// </para>
/// <returns>
/// Array of the values associated with the property, or null if the
/// property does not exist.
/// </returns>
public Values this[Property property]
{
get
{
Values values = null;
// A read / write upgradable guard could be used in the future
// should the performance of GetPropertyValueIndexes prove too
// slow in the future. The use of a lock on the dictionary
// ensures that this implementation is thread safe.
lock (PropertyIndexToValues)
{
if (PropertyIndexToValues.TryGetValue(
property.Index,
out values) == false)
{
values = new Entities.Values(
property,
GetPropertyValueIndexes(property));
PropertyIndexToValues.Add(property.Index, values);
}
}
return(values);
}
}
/// <summary>
/// Gets the values associated with the property.
/// </summary>
/// <param name="property">
/// The property whose values are required.
/// </param>
/// <returns>
/// Value(s) associated with the property, or null if the property
/// does not exist.
/// </returns>
public Values this[Property property]
{
get
{
Values values = null;
if (PropertyIndexToValues.TryGetValue(property.Index, out values) == false)
{
lock (this)
{
if (PropertyIndexToValues.TryGetValue(property.Index, out values) == false)
{
values = GetPropertyValues(property);
PropertyIndexToValues.Add(property.Index, values);
}
}
}
return(values);
}
}
