supplierorderejb.java

sun公司的petstore,一个J2ee的示例应用程序.

/*
 * 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
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * 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
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
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 * for use in the design, construction, operation or maintenance of
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package com.sun.j2ee.blueprints.supplierpo.ejb;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.CreateException;
import javax.ejb.RemoveException;
import javax.ejb.CreateException;
import javax.ejb.FinderException;

import java.util.Iterator;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;

import com.sun.j2ee.blueprints.contactinfo.ejb.ContactInfoLocal;
import com.sun.j2ee.blueprints.contactinfo.ejb.ContactInfoLocalHome;
import com.sun.j2ee.blueprints.address.ejb.AddressLocal;
import com.sun.j2ee.blueprints.address.ejb.AddressLocalHome;
import com.sun.j2ee.blueprints.lineitem.ejb.LineItem;
import com.sun.j2ee.blueprints.lineitem.ejb.LineItemLocal;
import com.sun.j2ee.blueprints.lineitem.ejb.LineItemLocalHome;

import com.sun.j2ee.blueprints.supplierpo.ejb.OrderStatusNames;
import com.sun.j2ee.blueprints.supplierpo.ejb.JNDINames;

import com.sun.j2ee.blueprints.servicelocator.ejb.ServiceLocator;
import com.sun.j2ee.blueprints.servicelocator.ServiceLocatorException;

/**
 * This is the main Entity Bean class for SupplierOrderEJB
 * It has a one-many relatioship with the LineItemEJB, and one-to-one
 * relationship between ContactInfoEJB
 */

public abstract class SupplierOrderEJB implements EntityBean {

  private EntityContext context = null;

  /**
   * Accessor method for purchase order ID
   * @return String  the PO id
   */
  public abstract String getPoId();

  /**
   * Setter method for PO id
   * @param String the PO ID
   */
  public abstract void setPoId(String id);

  /**
   * Accessor method for purchase order Date
   * @return long  the PO Date - time from epoch
   */
  public abstract long getPoDate();


  /**
   * Setter method for PO Date
   * @param long the PO Date - time from epoch
   */
  public abstract void setPoDate(long orderDate);

  /**
   * Accessor method for purchase order status
   * @return String  the PO status
   */
  public abstract String getPoStatus();


  /**
   * Setter method for PO status
   * @param String the PO status
   */
  public abstract void setPoStatus(String stat);

  /**
   * Accessor method for purchase order contact info
   * @return <Code>ContactInfoLocal</Code>  the PO contactinfo
   */
  public abstract ContactInfoLocal getContactInfo();

  /**
   * Setter method for PO contact info
   * @param <Code>ContactInfoLocal</Code> the PO contact info
   */
  public abstract void setContactInfo(ContactInfoLocal addr);

  /**
   * Accessor method for purchase order line items
   * @return <Code>Collection</Code>  the PO lientems
   */
  public abstract Collection getLineItems();

  /**
   * Setter method for PO line items
   * @param <Code>Collection</Code> the PO lineitems
   */
  public abstract void setLineItems(Collection litems);

  /**
   * Method adds a line item to existing lineitems
   * @param <Code>LineItemLocal</Code> the line item details
   */
  public void addLineItem(LineItemLocal lItem){
    getLineItems().add(lItem);
  }

  /**
   * the ejbCreate method
   * @param <code>supplierOrder</code>
   */
  public String ejbCreate(SupplierOrder supplierOrder) throws CreateException {
    setPoId(supplierOrder.getOrderId());
    setPoDate(supplierOrder.getOrderDate().getTime());
    setPoStatus(OrderStatusNames.PENDING);
    return null;
  }

  /**
   * the ejbPostCreate method
   * @param <code>supplierOrder</code>
   */
  public void ejbPostCreate(SupplierOrder supplierOrder)
                                              throws CreateException {
  try {
      ServiceLocator serviceLocator = new ServiceLocator();
      ContactInfoLocalHome cinforef = (ContactInfoLocalHome)
          serviceLocator.getLocalHome(JNDINames.CINFO_EJB);
      ContactInfoLocal cinfoloc = (ContactInfoLocal)
                      cinforef.create(supplierOrder.getShippingInfo());
      setContactInfo(cinfoloc);
      LineItemLocalHome lineItemref = (LineItemLocalHome)
          serviceLocator.getLocalHome(JNDINames.LI_EJB);
      Collection litems = supplierOrder.getLineItems();
      Iterator it = litems.iterator();
      while((it != null) && (it.hasNext())) {
        LineItem li = (LineItem) it.next();
        LineItemLocal lineItemloc = (LineItemLocal) lineItemref.create(li, 0);
        addLineItem(lineItemloc);
      }
    } catch(ServiceLocatorException ne) {
      throw new CreateException("ServiceLocator Ex while persisting PO CMR :" +
                                ne.getMessage());
    }
  }

  /**
   * Method gets a collection of all line items for this PO. This is required
   * because web tier cannot access CMR fields that return managed objects
   * without a transaction
   * @return <Code>Collection</Code> Colleciton of lineitems
   */
  public Collection getAllItems() {
    Collection liColl = getLineItems();
    if(liColl == null)
      return(null);
    ArrayList retVal = new ArrayList();
    Iterator it = liColl.iterator();
    while((it!=null) && (it.hasNext())) {
      LineItemLocal loc = (LineItemLocal) it.next();
      retVal.add(loc.getData());
    }
    return(retVal);
  }

  public SupplierOrder getData() {
    SupplierOrder supplierOrder = new SupplierOrder();
    supplierOrder.setOrderId(getPoId());
    supplierOrder.setOrderDate(new Date(getPoDate()));
    supplierOrder.setShippingInfo(supplierOrder.getShippingInfo());
    Collection lineItems = getLineItems();
    for (Iterator iterator = lineItems.iterator(); iterator.hasNext();) {
      LineItemLocal lineItem = (LineItemLocal) iterator.next();
      supplierOrder.addLineItem(lineItem.getData());
    }
    return supplierOrder;
  }

  // other ejb life cycle methods
  public void setEntityContext(EntityContext c){ context = c; }
  public void unsetEntityContext(){}
  public void ejbRemove() throws RemoveException {}
  public void ejbActivate() {}
  public void ejbPassivate() {}
  public void ejbStore() {}
  public void ejbLoad() {}
}