data
Interface CountingStock

All Known Subinterfaces:

MoneyBag

All Known Implementing Classes:

CountingStockFilter, CountingStockImpl

public interface CountingStock

extends Stock

A Stock that counts for each CatalogItem in the associated Catalog how many objects of that type are actually available.

In contrast to StoringStocks, the StockItems for the same key have no differences when using CountingStocks. Therefore, only two pieces of information are needed: the key and the number of items for that key.

CountingStocks are by far the more common type of Stock.

Hooks:

Define CountingStock Filter

Since:

v2.0

Version:

2.0 18/08/1999

Author:

Steffen Zschaler

Fields inherited from class data.Nameable

NAME_PROPERTY

Method Summary

void	add(String sKey, int nCount, DataBasket db) Add a number of items of a given key to the Stock.
void	remove(String sKey, int nCount, DataBasket db) Remove a number of items of a given key from the Stock.

Methods inherited from interface data.Stock

add, addStock, contains, contains, containsStock, countItems, fillStockWithValue, get, getCatalog, iterator, keySet, remove, remove, size, sumStock

Methods inherited from interface data.StockItem

clone, getAssociatedItem, getStock

Methods inherited from interface java.lang.Comparable

compareTo

Methods inherited from interface data.Nameable

addNameListener, addPropertyChangeListener, attach, detachNC, getName, removeNameListener, removePropertyChangeListener, setName

Method Detail

add

public void add(String sKey,
                int nCount,
                DataBasket db)

Add a number of items of a given key to the Stock.

As with any Stock the added items will not at once be visible to users of other DataBaskets.

In general the method behaves as though it would call Stock.add(data.StockItem, data.DataBasket) nCount times. Especially, the same exceptions might occur and the same constraints hold.

Override:

Always.

Parameters:

sKey - the key for which to add a number of items.

nCount - how many items are to be added?

db - the DataBasket relative to which the adding is performed.

Throws:

IllegalArgumentException - if nCount <= 0.

CatalogConflictException - if the key cannot be found in the Catalog.

remove

public void remove(String sKey,
                   int nCount,
                   DataBasket db)
            throws VetoException

Remove a number of items of a given key from the Stock.

In general the method behaves as though it would call Stock.remove(java.lang.String, data.DataBasket) nCount times. Especially, the same exceptions might occur and the same constraints hold.

Override:

Always.

Parameters:

sKey - the key for which to remove a number of items.

nCount - how many items are to be removed?

db - the DataBasket relative to which the removal is performed.

Throws:

VetoException - if a listener vetos the removal.

NotEnoughElementsException - if there are not enough elements to fulfill the request. If this exception is thrown no items will have been removed.

IllegalArgumentException - if nCount <= 0