internal DatabaseCursor(DatabaseReader reader)
{
this.reader = reader;
}
public bool InitFromReader(DatabaseReader reader)
{
var type = this.GetType();
var fieldInfos = type.GetFields(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Public);
foreach (var fieldInfo in fieldInfos)
{
var attribs = fieldInfo.GetCustomAttributes(typeof(PropertyAttribute), true);
foreach (var attrib in attribs)
{
var propAttrib = (PropertyAttribute)attrib;
var columnName = propAttrib.Column ?? fieldInfo.Name.ToLower();
Type fieldType = fieldInfo.FieldType;
object val = reader [columnName];
if (val == null)
{
if (fieldType.IsClass)
{
fieldInfo.SetValue(this, null);
}
else
{
var fieldCtorEmpty = fieldType.GetConstructor(new Type[] { });
if (fieldCtorEmpty == null)
{
fieldInfo.SetValue(this, null);
}
else
{
var obj = fieldCtorEmpty.Invoke(new object[] { });
fieldInfo.SetValue(this, obj);
}
}
}
else
{
var valueType = val.GetType();
if (fieldType.IsAssignableFrom(valueType))
{
fieldInfo.SetValue(this, val);
}
else if (valueType == typeof(int) && fieldType == typeof(long))
{
fieldInfo.SetValue(this, (long)(int)val);
}
else if (valueType == typeof(long) && fieldType == typeof(int))
{
fieldInfo.SetValue(this, (int)(long)val);
}
else
{
var fieldCtorValue = fieldType.GetConstructor(new Type[] { valueType });
if (fieldCtorValue == null)
{
throw new InvalidCastException("Can't initialize field " + type.Name + "." + fieldInfo.Name + " from column " + columnName + ". Type is " + valueType.Name + ".");
}
else
{
var obj = fieldCtorValue.Invoke(new object[] { val });
fieldInfo.SetValue(this, obj);
}
}
}
}
}
return(true);
}