Base class for cloning an object in C#
Base class for cloning an object in C#
/// <summary>
/// BaseObject class is an abstract class for you to derive from.
/// Every class that will be dirived from this class will support the
/// Clone method automaticly.<br>
/// The class implements the interface ICloneable and there
/// for every object that will be derived <br>
/// from this object will support the ICloneable interface as well.
/// </summary> public abstract class BaseObject : ICloneable
{
/// <summary>
/// Clone the object, and returning a reference to a cloned object.
/// </summary>
/// <returns>Reference to the new cloned
/// object.</returns>
public object Clone()
{
//First we create an instance of this specific type.
object newObject = Activator.CreateInstance( this.GetType() ); //We get the array of fields for the new type instance.
FieldInfo[] fields = newObject.GetType().GetFields(); int i = ; foreach( FieldInfo fi in this.GetType().GetFields() )
{
//We query if the fiels support the ICloneable interface.
Type ICloneType = fi.FieldType.
GetInterface( "ICloneable" , true ); if( ICloneType != null )
{
//Getting the ICloneable interface from the object.
ICloneable IClone = (ICloneable)fi.GetValue(this); //We use the clone method to set the new value to the field.
fields[i].SetValue( newObject , IClone.Clone() );
}
else
{
// If the field doesn't support the ICloneable
// interface then just set it.
fields[i].SetValue( newObject , fi.GetValue(this) );
} //Now we check if the object support the
//IEnumerable interface, so if it does
//we need to enumerate all its items and check if
//they support the ICloneable interface.
Type IEnumerableType = fi.FieldType.GetInterface
( "IEnumerable" , true );
if( IEnumerableType != null )
{
//Get the IEnumerable interface from the field.
IEnumerable IEnum = (IEnumerable)fi.GetValue(this); //This version support the IList and the
//IDictionary interfaces to iterate on collections.
Type IListType = fields[i].FieldType.GetInterface
( "IList" , true );
Type IDicType = fields[i].FieldType.GetInterface
( "IDictionary" , true ); int j = ;
if( IListType != null )
{
//Getting the IList interface.
IList list = (IList)fields[i].GetValue(newObject); foreach( object obj in IEnum )
{
//Checking to see if the current item
//support the ICloneable interface.
ICloneType = obj.GetType().
GetInterface( "ICloneable" , true ); if( ICloneType != null )
{
//If it does support the ICloneable interface,
//we use it to set the clone of
//the object in the list.
ICloneable clone = (ICloneable)obj; list[j] = clone.Clone();
} //NOTE: If the item in the list is not
//support the ICloneable interface then in the
//cloned list this item will be the same
//item as in the original list
//(as long as this type is a reference type). j++;
}
}
else if( IDicType != null )
{
//Getting the dictionary interface.
IDictionary dic = (IDictionary)fields[i].
GetValue(newObject);
j = ; foreach( DictionaryEntry de in IEnum )
{
//Checking to see if the item
//support the ICloneable interface.
ICloneType = de.Value.GetType().
GetInterface( "ICloneable" , true ); if( ICloneType != null )
{
ICloneable clone = (ICloneable)de.Value; dic[de.Key] = clone.Clone();
}
j++;
}
}
}
i++;
}
return newObject;
}
}
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