jdo
美 
英
- 网络爪哇数据对象(Java Data Objects)；北茹阿泽鲁机场；一个不成熟的产品
例句
JDO's pure object-oriented approach and simplicity-by-design lend it a faster ramp-up time than the other two persistence technologies.
JDO的纯面向对象方法和设计的简单性使掌握它所需的适应期比其它两种持久性技术都短。
Initially released in December 1999, Castor JDO was one of the first open source data binding frameworks available.
CastorJDO最早发布于1999年12月，它是第一批可用的开放源码数据绑定框架之一。
This is where you can start to see how JDO allows you to handle persistence in an object-oriented fashion.
从这里开始可以看到JDO如何允许您以面向对象的方式来处理持久性。
Like other specifications within the Java family, JDO eliminates the risk of becoming locked into a particular vendor.
与Java家族中的其他规范相似，JDO消除了锁定到特定供应商的危险。
It also includes a jdoconfig. xml file, so once you annotate the Contact class, you'll be ready to start using JDO.
它还包含了一个jdoconfig.xml文件，因此，一旦对Contact类进行了注释，您就已经准备好开始使用JDO。
The JDO and JPA interfaces present some leaky abstractions due to the fact that BigTable is not a relational database.
由于BigTable不是一个关系数据库，JDO和JPA的接口出现了一些抽象泄漏。
With a simple triathlon JDO POJO defined and a PersistenceMgr object handy, I'm good to go.
利用定义好的简单triathlonJDOPOJO和方便的PersistenceMgr对象，我已经有了很好的起点。
Even through the JDO specification is just beginning its evolution, it has already filled a void within the Java community.
尽管JDO规范的发展还刚刚起步，它已经填补了Java社区中的一个空白。
You ll see a stronger standard, and the better JDO vendors will be able to participate in those markets.
您将会看到一个更强大的标准，而且好的JDO供应商将能够在那些市场中占有一席之地。
Since JDO is still a rather new technology (the youngest of J2EE's persistence solutions), we'll start with an overview of how it works.
由于JDO仍是一种相当新的技术（最新的J2EE持久性解决方案），所以我们将首先概述其工作原理。
At present, none of the major relational database management systems (RDBMS) vendors support JDO.
目前，没有任何主要的关系数据库管理系统（RDBMS）供应商支持JDO。
JDO facilitates rapid development with an open standard and can be used in nearly any Java environment.
JDO为基于开放标准的快速开发提供了便利，几乎可用于任何Java环境。
Castor comes with some JDO examples that present a data model and an object model surrounding the notion of a product.
Castor附带了一些JDO示例，它们给出了围绕某个产品概念的数据模型和对象模型。
JDO programmers are able to operate entirely within an object-oriented paradigm.
JDO程序员能完全在面向对象的范例内操作。
Castor JDO is just one of many data-binding solutions available in the open source world today.
CastorJDO只不过是当今开放源码世界中许多可用数据绑定解决方案中的一种。
For the past three years or so, the best technical persistence frameworks have come from the JDO community.
在过去三年左右的时间里，最好的技术持久性框架来自JDO社区。
I'll use a simple HTML page, a Groovlet, and a JDO-enhanced Java class to persist an event (in this case, a triathlon).
我将使用一个简单的HTTP页面、一个Groovlet以及一个增强了JDO的Java类来持久化事件（在本例中为triathlon）。
All of this leaves JDO developers and architects with few proven design patterns or case studies to guide their JDO development efforts.
所有这些现状使JDO开发人员和架构设计师几乎没有已经实践证明的设计模式或案例研究来指导他们的JDO开发工作。
When writing a class that will be persisted by JDO, the type of the class's datamembers is of significant consideration.
当编写一个将来由JDO持久存储的类时，类中数据成员的类型很重要。
This introductory article should be enough to get you started with the JPOX implementation of JDO 2. 0.
这篇介绍性的文章应该足以让您初识JDO2.0的JPOX实现。
So, although JDO objects can easily be declared as transactional, they must still be accessed using non-transactional components.
因此，尽管很容易将JDO对象声明为事务性的，但仍必须使用非事务性组件来访问它们。
J2EE architects and developers must weigh the lack of patterns, best practices, and case studies against the inherent simplicity of JDO.
相对于JDO固有的简单性，J2EE架构设计师和开发人员必须权衡缺乏模式、最佳实践和案例研究所产生的影响。
Since more of what otherwise would be application code is handled transparently by the JDO libraries, it can reduce bugs and time to market.
由于更多的应用程序代码变为通过JDO库来透明地处理，因此可以减少bug，同时也可加快发布的时间。
While these numbers don't suggest that JDO is a bad technology, they do suggest it's still on the cutting edge.
尽管这些数据并不表示JDO是一种差劲的技术，但它们确实表明它还处于前沿。
You can set up relationships in JPA and JDO, but they can only be used for persisting relationships.
您可以在JPA和JDO间设置关系，但它们只能用来持久化关系。
First, we will focus on the steps required to enhance a standard Java class (POJO) to become capable of JDO persistence.
首先，我们将会关注将一个标准Java类（POJO）转化为支持JDO持久性所需要的步骤。
JDO does not require the application to provide any explicit mappings.
JDO并不需要程序去提供任何显式的映射。
Most EJB CMP CMR solutions use code generation to implement persistence code, while JDO uses bytecode decoration.
大多数EJBCMPCMR解决方案使用代码生成实现持久性代码，而JDO使用字节码修饰。
Essentially, PersistenceManager is the main interface to the JDO persistence system.
基本上，PersistenceManager是JDO持久性系统的主接口。
JDO intercepts updates to persisted objects and automatically persists any changes in state.
JDO会拦截对被持久存储对象的更新，并自动持久存储状态的任何更改。
What JDO lacks in best practices it makes up for in simplicity.
对于在最佳实践方面的不足，JDO用简单性来弥补。
You ll find that many of these steps are applicable to other JDO implementations.
您会发现许多步骤也适用于其他的JDO实现。
JDO doesn't just persist Java objects; it transparently handles the persistence of the entire relevant object graph.
JDO并不仅仅使Java对象持久；它还透明地处理整个相关对象图的持久性。
JDO reduces release cycles and increases software quality for persistence code.
JDO可以缩短发布周期，并提高持久性代码的软件质量。
This becomes abundantly clear when studying the documentation of relationships in JDO, which is sparse and contains incomplete examples.
学习JDO中的关系文档（很少，而且包含一些不完整的示例）时，这点就变得显而易见了。
JDO also provides transparent persistence on arbitrary data stores.
JDO还为任意的数据存储提供透明的持久性。
On Sourceforge has all the information you ll need to get started using this JDO implementation.
提供了您开始使用这一JDO实现所需要的全部信息。
JDO has also adopted much of the high-level architecture used by JDBC.
JDO还采用了很多JDBC使用的高级体系结构。
They must be combined with other technologies, such as entity beans, JDBC, or JDO, to create a mechanism for persistent data management.
它们必须与其它技术（如实体bean、JDBC或JDO）相结合以创建一种持久数据管理机制。
The JDO examples provide a one-to-one representation of tables to objects.
JDO示例提供了表到对象的一对一表示。
