Data items manager

A computer system comprising:

• at least one processor;
• and
• at least one memory comprising instructions stored thereon that when executed by the at least one processor cause the at least one processor to invoke an items manager that is separate from a client and separate from a data source to perform acts comprising:
• requesting data items, by an items manager, from a data source via a data source adapter;
• receiving, by the items manager, data items from the data source via the data source adapter;
• maintaining, by the items manager, a list of data representation items representing data items received from the data source, wherein maintaining the list of data representation items comprises the items manager performing the following acts:
• dehydrating state of a data representation item in the list, the state representing one or more changes to the data representation item in response to user input, and the dehydrating comprising storing the state in storage;
• removing the data representation item from the list;
• re-inserting the data representation item back into the list;
• and
• rehydrating the state from the storage back into the data representation item, the state of the data representation item that is stored as part of the dehydrating being the same as the state of the data representation item after rehydrating the state from the storage back into the data representation item;
• and
• providing, by the items manager, a client with an enumeration through the list of data representation items.

One or more computer-readable storage media having computer-executable instructions embodied thereon that, when executed by at least one processor, cause the at least one processor to perform acts comprising:

• requesting data items, by an items manager, from a data source via a data source adapter;
• receiving, by the items manager, data items from the data source via the data source adapter;
• maintaining, by the items manager, a list of data representation items representing data items received from the data source, wherein maintaining the list of data representation items comprises the items manager performing the following acts:
• dehydrating state of a data representation item in the list, the state representing one or more changes to the data representation item in response to user input, and the dehydrating comprising storing the state in storage;
• removing the data representation item from the list;
• re-inserting the data representation item back into the list;
• and
• rehydrating the state from the storage back into the data representation item, the state of the data representation item that is stored as part of the dehydrating being the same as the state of the data representation item after rehydrating the state from the storage back into the data representation item;
• and
• providing, by the items manager, a client with an enumeration through the list of data representation items.