inventoryejb.java

Sun的宠物店源码

/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * - Redistribution in binary form must reproduce the above copyright
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 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
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package com.sun.j2ee.blueprints.supplier.inventory.ejb;

import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.CreateException;
import javax.ejb.RemoveException;

/**
 * This is the Local Entity Bean class for the InventoryEJB
 */

public abstract class InventoryEJB implements EntityBean {

    private EntityContext ectx = null;

    /**
     * Accessor method to get container managed field itemId
     * @return String that represents the itemId
     */
    public abstract String getItemId();

    /**
     * setter method for setting the container managed field itemId
     * @param itemId a String that represents the itemId
     */
    public abstract void setItemId(String itemId);

    /**
     * Accessor method to get container managed field quantity
     * @return int that represents the quantity
     */
    public abstract int getQuantity();

    /**
     * setter method for setting the container managed field quantity
     * @param quantity an integer that represents the quantity
     */
    public abstract void setQuantity(int quantity);

    /**
     * This method allows reducing the quantity by a given amount
     * @param quantity an integer that represents the amount by which the
     *                 quantity has to be reduced
     */
    public void reduceQuantity(int quantity) {
        int q = this.getQuantity();
        setQuantity(q-quantity);
    }

    /**
     * This method allows increasing the quantity by a given amount
     * @param quantity an integer that represents the amount by which the
     *                 quantity has to be increased

    public void addQuantity(int quantity) {
        int q = this.getQuantity();
        setQuantity(q+quantity);
    }
    */

    /**
     * THE ejbCreate method
     * @param itemId a String that represents the itemId.
     * @param quantity an integer that represents the amount of items present
     * @throws <Code>CreateException</Code> if create fails
     */
    public String ejbCreate(String itemId, int quantity)
                                              throws CreateException {
        setItemId(itemId);
        setQuantity(quantity);
        return(null);
    }

    /*
     * Other ejb life cycle methids
     */
    public void ejbPostCreate(String itemId, int quantity) throws CreateException {}
    public void setEntityContext(EntityContext c){ ectx = c; }
    public void unsetEntityContext(){}
    public void ejbRemove() throws RemoveException {}
    public void ejbActivate() {}
    public void ejbPassivate() {}
    public void ejbStore() {}
    public void ejbLoad() {}
}