public MergeableRow()
{
Type curType = this.GetType();
AttributeProperties curAttrProps;
lock (AttributePropDict)
{
if (!AttributePropDict.TryGetValue(curType, out curAttrProps))
{
curAttrProps = new AttributeProperties();
foreach (PropertyInfo propInfo in curType.GetProperties())
{
var idAttr = propInfo.GetCustomAttribute(typeof(IdColumn)) as IdColumn;
if (idAttr != null)
{
curAttrProps.IdAttributeProps.Add(propInfo);
}
var compAttr = propInfo.GetCustomAttribute(typeof(CompareColumn)) as CompareColumn;
if (compAttr != null)
{
curAttrProps.CompareAttributeProps.Add(propInfo);
}
var deleteAttr = propInfo.GetCustomAttribute(typeof(DeleteColumn)) as DeleteColumn;
if (deleteAttr != null)
{
curAttrProps.DeleteAttributeProps.Add(Tuple.Create(propInfo, deleteAttr.DeleteOnMatchValue));
}
}
AttributePropDict.TryAdd(curType, curAttrProps);
}
}
}
public MergeableRow()
{
Type curType = this.GetType();
AttributeProperties curAttrProps;
if (!AttributePropDict.TryGetValue(curType, out curAttrProps))
{
lock (this)
{
curAttrProps = new AttributeProperties();
foreach (PropertyInfo propInfo in curType.GetProperties())
{
var idAttr = propInfo.GetCustomAttribute(typeof(IdColumn)) as IdColumn;
if (idAttr != null)
{
curAttrProps.IdAttributeProps.Add(propInfo);
}
var compAttr = propInfo.GetCustomAttribute(typeof(CompareColumn)) as CompareColumn;
if (compAttr != null)
{
curAttrProps.CompareAttributeProps.Add(propInfo);
}
}
AttributePropDict.TryAdd(curType, curAttrProps);
}
}
}
/// <summary>
/// Overriding the Equals implementation. The Equals function is used identify records
/// that don't need to be updated. Only properties marked with the CompareColumn attribute
/// are considered for the comparison. If the property is of type object, the Equals() method of the object is used.
/// </summary>
/// <param name="other">Object to compare with. Should be of the same type.</param>
/// <returns>True if all properties marked with CompareColumn attribute are equal.</returns>
public override bool Equals(object other)
{
if (other == null)
{
return(false);
}
AttributeProperties attrProps = AttributePropDict[this.GetType()];
bool result = true;
foreach (var propInfo in attrProps.CompareAttributeProps)
{
result &= (propInfo?.GetValue(this))?.Equals(propInfo?.GetValue(other)) ?? false;
}
return(result);
}
