vendorpartbean.java

Sun公司的<J2EE Tutorial>范例代码

/*
 * Copyright (c) 2006 Sun Microsystems, Inc.  All rights reserved.  U.S.
 * Government Rights - Commercial software.  Government users are subject
 * to the Sun Microsystems, Inc. standard license agreement and
 * applicable provisions of the FAR and its supplements.  Use is subject
 * to license terms.
 *
 * This distribution may include materials developed by third parties.
 * Sun, Sun Microsystems, the Sun logo, Java and J2EE are trademarks
 * or registered trademarks of Sun Microsystems, Inc. in the U.S. and
 * other countries.
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. Tous droits reserves.
 *
 * Droits du gouvernement americain, utilisateurs gouvernementaux - logiciel
 * commercial. Les utilisateurs gouvernementaux sont soumis au contrat de
 * licence standard de Sun Microsystems, Inc., ainsi qu'aux dispositions
 * en vigueur de la FAR (Federal Acquisition Regulations) et des
 * supplements a celles-ci.  Distribue par des licences qui en
 * restreignent l'utilisation.
 *
 * Cette distribution peut comprendre des composants developpes par des
 * tierces parties. Sun, Sun Microsystems, le logo Sun, Java et J2EE
 * sont des marques de fabrique ou des marques deposees de Sun
 * Microsystems, Inc. aux Etats-Unis et dans d'autres pays.
 */


package dataregistry;

import javax.ejb.*;


public abstract class VendorPartBean implements EntityBean {
    private EntityContext context;

    /**
     * @see EntityBean#setEntityContext(EntityContext)
     */
    public void setEntityContext(EntityContext aContext) {
        context = aContext;
    }

    /**
     * @see EntityBean#ejbActivate()
     */
    public void ejbActivate() {
    }

    /**
     * @see EntityBean#ejbPassivate()
     */
    public void ejbPassivate() {
    }

    /**
     * @see EntityBean#ejbRemove()
     */
    public void ejbRemove() {
    }

    /**
     * @see EntityBean#unsetEntityContext()
     */
    public void unsetEntityContext() {
        context = null;
    }

    /**
     * @see EntityBean#ejbLoad()
     */
    public void ejbLoad() {
    }

    /**
     * @see EntityBean#ejbStore()
     */
    public void ejbStore() {
    }

    public abstract String getDescription();

    public abstract void setDescription(String description);

    public abstract double getPrice();

    public abstract void setPrice(double price);

    public abstract LocalPart getPart();

    public abstract void setPart(LocalPart part);

    public abstract LocalVendor getVendor();

    public abstract void setVendor(LocalVendor vendor);

    public Object ejbCreate(String description, double price, LocalPart part)
        throws CreateException {
        setDescription(description);
        setPrice(price);

        return null;
    }

    public void ejbPostCreate(String description, double price, LocalPart part)
        throws CreateException {
        setPart(part);
    }

    public abstract Double ejbSelectAvgPrice() throws FinderException;

    public abstract Double ejbSelectTotalPricePerVendor(int vendorId)
        throws FinderException;

    public Double ejbHomeGetAvgPrice() throws FinderException {
        return ejbSelectAvgPrice();
    }

    public Double ejbHomeGetTotalPricePerVendor(int vendorId)
        throws FinderException {
        return ejbSelectTotalPricePerVendor(vendorId);
    }
}