/// <summary>
/// Returns whether two instances have equivalent keys
/// </summary>
/// <param name="instance1">The first instance to compare</param>
/// <param name="instance2">The second instance to compare</param>
/// <returns>True if the keys are equal, otherwise false</returns>
private bool AreKeysEqual(ResourceInstance instance1, ResourceInstance instance2)
{
ExceptionUtilities.CheckArgumentNotNull(instance1, "instance1");
ExceptionUtilities.CheckArgumentNotNull(instance2, "instance2");
ExceptionUtilities.Assert(instance1.IsEntityType, "Key equality check only supported on entities");
ExceptionUtilities.Assert(instance2.IsEntityType, "Key equality check only supported on entities");
if (instance1.ResourceSetName != instance2.ResourceSetName)
{
return false;
}
var type1 = this.metadataHelper.ResourceTypes.Single(t => t.FullName == instance1.ResourceTypeName);
var type2 = this.metadataHelper.ResourceTypes.Single(t => t.FullName == instance2.ResourceTypeName);
if (!type1.KeyProperties.SequenceEqual(type2.KeyProperties))
{
return false;
}
foreach (var keyProperty in type1.KeyProperties)
{
var value1 = instance1.Where(pair => pair.Key == keyProperty.Name).Select(pair => pair.Value).SingleOrDefault();
var value2 = instance2.Where(pair => pair.Key == keyProperty.Name).Select(pair => pair.Value).SingleOrDefault();
if (!ResourceInstance.ArePropertyValuesEqual(value1, value2))
{
return false;
}
}
return true;
}
