public CacheKeyList(CacheList aMaster, string aKeyName)
: base()
{
if (aMaster == null)
{
throw new Exception("Trying to create CacheKeyList with null master");
}
master = aMaster;
if (master.IsValidField(aKeyName) == false)
{
throw new Exception("Trying to assign invalid key: " + aKeyName);
}
keyName = aKeyName;
}
public int CompareData(string aField, object aComparer, object aObject)
{
PropertyInfo info = CacheType.GetProperty(aField);
if (aField == null)
{
throw new Exception("Trying to sort with non existant property");
}
if ((aObject == null) || (aComparer == null))
{
throw new Exception("Trying to sort with null object:\n" +
" Comparer: " + aComparer + "\n" +
" Object: " + aObject);
}
if ((aObject.GetType() != CacheType) || (aComparer.GetType() != CacheType))
{
throw new Exception("Trying to sort with wrong object");
}
if (info.PropertyType is IComparable)
{
return((info.GetValue(aComparer, null) as IComparable).CompareTo(info.GetValue(aObject, null)));
}
if ((info.PropertyType == typeof(int)) || (info.PropertyType == typeof(System.Int32)))
{
int a = (int)info.GetValue(aComparer, null);
int b = (int)info.GetValue(aObject, null);
return(CacheList.CompareData(a, b));
}
if ((info.PropertyType is string) || (info.PropertyType == typeof(System.String)))
{
string a = (string)info.GetValue(aComparer, null);
string b = (string)info.GetValue(aObject, null);
return(CacheList.CompareData(a, b));
}
if (info.PropertyType is DateTime)
{
DateTime a = (DateTime)info.GetValue(aComparer, null);
DateTime b = (DateTime)info.GetValue(aObject, null);
return(CacheList.CompareData(a, b));
}
throw new Exception("Wrong type comparision: " + info.PropertyType);
}
private int CompareKeyData(object aComparer, object aObject)
{
if ((aObject == null) || (aComparer == null))
{
throw new Exception("Trying to sort with null object:\n" +
" Comparer: " + aComparer + "\n" +
" Object: " + aObject);
}
if ((aObject.GetType() != CacheType) || (aComparer.GetType() != CacheType))
{
throw new Exception("Trying to sort with wrong object");
}
if (keyinfo.PropertyType is IComparable)
{
return((keyinfo.GetValue(aComparer, null) as IComparable).CompareTo(keyinfo.GetValue(aObject, null)));
}
if ((keyinfo.PropertyType == typeof(int)) || (keyinfo.PropertyType == typeof(System.Int32)))
{
int a = (int)keyinfo.GetValue(aComparer, null);
int b = (int)keyinfo.GetValue(aObject, null);
return(CacheList.CompareData(a, b));
}
if ((keyinfo.PropertyType is string) || (keyinfo.PropertyType == typeof(System.String)))
{
string a = (string)keyinfo.GetValue(aComparer, null);
string b = (string)keyinfo.GetValue(aObject, null);
return(CacheList.CompareData(a, b));
}
if (keyinfo.PropertyType is DateTime)
{
DateTime a = (DateTime)keyinfo.GetValue(aComparer, null);
DateTime b = (DateTime)keyinfo.GetValue(aObject, null);
return(CacheList.CompareData(a, b));
}
throw new Exception("Wrong type comparision: " + keyinfo.PropertyType);
}
public KeyCompare(CacheList aMaster, string aKeyName)
{
master = new WeakReference(aMaster);
keyName = aKeyName;
}
