jdo
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英
- 網絡爪哇數據對象(Java Data Objects)；北茹阿澤魯機場；一個不成熟的產品
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的純面向對象方法和設計的簡單性使掌握它所需的適應期比其它兩種持久性技術都短。
Initially released in December 1999, Castor JDO was one of the first open source data binding frameworks available.
CastorJDO最早發布于1999年12月，它是第一批可用的開放源碼數據綁定框架之一。
This is where you can start to see how JDO allows you to handle persistence in an object-oriented fashion.
從這里開始可以看到JDO如何允許您以面向對象的方式來處理持久性。
Like other specifications within the Java family, JDO eliminates the risk of becoming locked into a particular vendor.
與Java家族中的其他規范相似，JDO消除了鎖定到特定供應商的危險。
It also includes a jdoconfig. xml file, so once you annotate the Contact class, you'll be ready to start using JDO.
它還包含了一個jdoconfig.xml文件，因此，一旦對Contact類進行了注釋，您就已經準備好開始使用JDO。
The JDO and JPA interfaces present some leaky abstractions due to the fact that BigTable is not a relational database.
由于BigTable不是一個關系數據庫，JDO和JPA的接口出現了一些抽象泄漏。
With a simple triathlon JDO POJO defined and a PersistenceMgr object handy, I'm good to go.
利用定義好的簡單triathlonJDOPOJO和方便的PersistenceMgr對象，我已經有了很好的起點。
Even through the JDO specification is just beginning its evolution, it has already filled a void within the Java community.
盡管JDO規范的發展還剛剛起步，它已經填補了Java社區中的一個空白。
You ll see a stronger standard, and the better JDO vendors will be able to participate in those markets.
您將會看到一個更強大的標準，而且好的JDO供應商將能夠在那些市場中占有一席之地。
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仍是一種相當新的技術（最新的J2EE持久性解決方案），所以我們將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，沒有任何主要的關系數據庫管理系統（RDBMS）供應商支持JDO。
JDO facilitates rapid development with an open standard and can be used in nearly any Java environment.
JDO為基于開放標準的快速開發提供了便利，幾乎可用于任何Java環境。
Castor comes with some JDO examples that present a data model and an object model surrounding the notion of a product.
Castor附帶了一些JDO示例，它們給出了圍繞某個產品概念的數據模型和對象模型。
JDO programmers are able to operate entirely within an object-oriented paradigm.
JDO程序員能完全在面向對象的范例內操作。
Castor JDO is just one of many data-binding solutions available in the open source world today.
CastorJDO只不過是當今開放源碼世界中許多可用數據綁定解決方案中的一種。
For the past three years or so, the best technical persistence frameworks have come from the JDO community.
在過去三年左右的時間里，最好的技術持久性框架來自JDO社區。
I'll use a simple HTML page, a Groovlet, and a JDO-enhanced Java class to persist an event (in this case, a triathlon).
我將使用一個簡單的HTTP頁面、一個Groovlet以及一個增強了JDO的Java類來持久化事件（在本例中為triathlon）。
All of this leaves JDO developers and architects with few proven design patterns or case studies to guide their JDO development efforts.
所有這些現狀使JDO開發人員和架構設計師幾乎沒有已經實踐證明的設計模式或案例研究來指導他們的JDO開發工作。
When writing a class that will be persisted by JDO, the type of the class's datamembers is of significant consideration.
當編寫一個將來由JDO持久存儲的類時，類中數據成員的類型很重要。
This introductory article should be enough to get you started with the JPOX implementation of JDO 2. 0.
這篇介紹性的文章應該足以讓您初識JDO2.0的JPOX實現。
So, although JDO objects can easily be declared as transactional, they must still be accessed using non-transactional components.
因此，盡管很容易將JDO對象聲明為事務性的，但仍必須使用非事務性組件來訪問它們。
J2EE architects and developers must weigh the lack of patterns, best practices, and case studies against the inherent simplicity of JDO.
相對于JDO固有的簡單性，J2EE架構設計師和開發人員必須權衡缺乏模式、最佳實踐和案例研究所產生的影響。
Since more of what otherwise would be application code is handled transparently by the JDO libraries, it can reduce bugs and time to market.
由于更多的應用程序代碼變為通過JDO庫來透明地處理，因此可以減少bug，同時也可加快發布的時間。
While these numbers don't suggest that JDO is a bad technology, they do suggest it's still on the cutting edge.
盡管這些數據并不表示JDO是一種差勁的技術，但它們確實表明它還處于前沿。
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間設置關系，但它們只能用來持久化關系。
First, we will focus on the steps required to enhance a standard Java class (POJO) to become capable of JDO persistence.
首先，我們將會關注將一個標準Java類（POJO）轉化為支持JDO持久性所需要的步驟。
JDO does not require the application to provide any explicit mappings.
JDO并不需要程序去提供任何顯式的映射。
Most EJB CMP CMR solutions use code generation to implement persistence code, while JDO uses bytecode decoration.
大多數EJBCMPCMR解決方案使用代碼生成實現持久性代碼，而JDO使用字節碼修飾。
Essentially, PersistenceManager is the main interface to the JDO persistence system.
基本上，PersistenceManager是JDO持久性系統的主接口。
JDO intercepts updates to persisted objects and automatically persists any changes in state.
JDO會攔截對被持久存儲對象的更新，并自動持久存儲狀態的任何更改。
What JDO lacks in best practices it makes up for in simplicity.
對于在最佳實踐方面的不足，JDO用簡單性來彌補。
You ll find that many of these steps are applicable to other JDO implementations.
您會發現許多步驟也適用于其他的JDO實現。
JDO doesn't just persist Java objects; it transparently handles the persistence of the entire relevant object graph.
JDO并不僅僅使Java對象持久；它還透明地處理整個相關對象圖的持久性。
JDO reduces release cycles and increases software quality for persistence code.
JDO可以縮短發布周期，并提高持久性代碼的軟件質量。
This becomes abundantly clear when studying the documentation of relationships in JDO, which is sparse and contains incomplete examples.
學習JDO中的關系文檔（很少，而且包含一些不完整的示例）時，這點就變得顯而易見了。
JDO also provides transparent persistence on arbitrary data stores.
JDO還為任意的數據存儲提供透明的持久性。
On Sourceforge has all the information you ll need to get started using this JDO implementation.
提供了您開始使用這一JDO實現所需要的全部信息。
JDO has also adopted much of the high-level architecture used by JDBC.
JDO還采用了很多JDBC使用的高級體系結構。
They must be combined with other technologies, such as entity beans, JDBC, or JDO, to create a mechanism for persistent data management.
它們必須與其它技術（如實體bean、JDBC或JDO）相結合以創建一種持久數據管理機制。
The JDO examples provide a one-to-one representation of tables to objects.
JDO示例提供了表到對象的一對一表示。
