Author: xhuang(a)jboss.com Date: 2007-10-25 20:57:21 -0400 (Thu, 25 Oct 2007) New Revision: 14137 Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/architecture.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/association_mapping.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/basic_mapping.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/batch.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/best_practices.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/collection_mapping.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/component_mapping.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/configuration.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/events.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_mappings.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_parentchild.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_weblog.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/filters.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/inheritance_mapping.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/performance.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/persistent_classes.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_criteria.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_hql.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_sql.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/quickstart.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/session_api.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/toolset_guide.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/transactions.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/tutorial.xml core/trunk/documentation/manual/zh-CN/src/main/docbook/content/xml.xml Log: Remove <feff> characters and match to latest English version Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/architecture.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/architecture.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/architecture.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="architecture"> +<chapter id="architecture"> <title>体系结构(Architecture)</title> <sect1 id="architecture-overview" revision="1"> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/association_mapping.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/association_mapping.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/association_mapping.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="associations"> +<chapter id="associations"> <title>关联关系映射</title> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/basic_mapping.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/basic_mapping.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/basic_mapping.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="mapping"> +<chapter id="mapping"> <title>对象/关系数据库映射基础(Basic O/R Mapping)</title> <sect1 id="mapping-declaration" revision="1"> @@ -857,6 +857,171 @@ </sect3> </sect2> + <sect2 id="mapping-declaration-id-enhanced"> + <title>Enhanced identifier generators</title> + + <para> + Starting with release 3.2.3, there are 2 new generators which represent a re-thinking of 2 different + aspects of identifier generation. The first aspect is database portability; the second is optimization + (not having to query the database for every request for a new identifier value). These two new + generators are intended to take the place of some of the named generators described above (starting + in 3.3.x); however, they are included in the current releases and can be referenced by FQN. + </para> + + <para> + The first of these new generators is <literal>org.hibernate.id.enhanced.SequenceStyleGenerator</literal> + which is intended firstly as a replacement for the <literal>sequence</literal> generator and secondly as + a better portability generator than <literal>native</literal> (because <literal>native</literal> + (generally) chooses between <literal>identity</literal> and <literal>sequence</literal> which have + largely different semantics which can cause subtle isssues in applications eyeing portability). + <literal>org.hibernate.id.enhanced.SequenceStyleGenerator</literal> however achieves portability in + a different manner. It chooses between using a table or a sequence in the database to store its + incrementing values depending on the capabilities of the dialect being used. The difference between this + and <literal>native</literal> is that table-based and sequence-based storage have the same exact + semantic (in fact sequences are exactly what Hibernate tries to emmulate with its table-based + generators). This generator has a number of configuration parameters: + <itemizedlist spacing="compact"> + <listitem> + <para> + <literal>sequence_name</literal> (optional, defaults to <literal>hibernate_sequence</literal>): + The name of the sequence (or table) to be used. + </para> + </listitem> + <listitem> + <para> + <literal>initial_value</literal> (optional, defaults to <literal>1</literal>): The initial + value to be retrieved from the sequence/table. In sequence creation terms, this is analogous + to the clause typical named "STARTS WITH". + </para> + </listitem> + <listitem> + <para> + <literal>increment_size</literal> (optional, defaults to <literal>1</literal>): The value by + which subsequent calls to the sequence/table should differ. In sequence creation terms, this + is analogous to the clause typical named "INCREMENT BY". + </para> + </listitem> + <listitem> + <para> + <literal>force_table_use</literal> (optional, defaults to <literal>false</literal>): Should + we force the use of a table as the backing structure even though the dialect might support + sequence? + </para> + </listitem> + <listitem> + <para> + <literal>value_column</literal> (optional, defaults to <literal>next_val</literal>): Only + relevant for table structures! The name of the column on the table which is used to + hold the value. + </para> + </listitem> + <listitem> + <para> + <literal>optimizer</literal> (optional, defaults to <literal>none</literal>): + See <xref linkend="mapping-declaration-id-enhanced-optimizers"/> + </para> + </listitem> + </itemizedlist> + </para> + <para> + The second of these new generators is <literal>org.hibernate.id.enhanced.TableGenerator</literal> which + is intended firstly as a replacement for the <literal>table</literal> generator (although it actually + functions much more like <literal>org.hibernate.id.MultipleHiLoPerTableGenerator</literal>) and secondly + as a re-implementation of <literal>org.hibernate.id.MultipleHiLoPerTableGenerator</literal> utilizing the + notion of pluggable optimiziers. Essentially this generator defines a table capable of holding + a number of different increment values simultaneously by using multiple distinctly keyed rows. This + generator has a number of configuration parameters: + <itemizedlist spacing="compact"> + <listitem> + <para> + <literal>table_name</literal> (optional, defaults to <literal>hibernate_sequences</literal>): + The name of the table to be used. + </para> + </listitem> + <listitem> + <para> + <literal>value_column_name</literal> (optional, defaults to <literal>next_val</literal>): + The name of the column on the table which is used to hold the value. + </para> + </listitem> + <listitem> + <para> + <literal>segment_column_name</literal> (optional, defaults to <literal>sequence_name</literal>): + The name of the column on the table which is used to hold the "segement key". This is the + value which distinctly identifies which increment value to use. + </para> + </listitem> + <listitem> + <para> + <literal>segment_value</literal> (optional, defaults to <literal>default</literal>): + The "segment key" value for the segment from which we want to pull increment values for + this generator. + </para> + </listitem> + <listitem> + <para> + <literal>segment_value_length</literal> (optional, defaults to <literal>255</literal>): + Used for schema generation; the column size to create this segment key column. + </para> + </listitem> + <listitem> + <para> + <literal>initial_value</literal> (optional, defaults to <literal>1</literal>): + The initial value to be retrieved from the table. + </para> + </listitem> + <listitem> + <para> + <literal>increment_size</literal> (optional, defaults to <literal>1</literal>): + The value by which subsequent calls to the table should differ. + </para> + </listitem> + <listitem> + <para> + <literal>optimizer</literal> (optional, defaults to <literal></literal>): + See <xref linkend="mapping-declaration-id-enhanced-optimizers"/> + </para> + </listitem> + </itemizedlist> + </para> + </sect2> + + <sect2 id="mapping-declaration-id-enhanced-optimizers"> + <title>Identifier generator optimization</title> + <para> + For identifier generators which store values in the database, it is inefficient for them to hit the + database on each and every call to generate a new identifier value. Instead, you'd ideally want to + group a bunch of them in memory and only hit the database when you have exhausted your in-memory + value group. This is the role of the pluggable optimizers. Currently only the two enhanced generators + (<xref linkend="mapping-declaration-id-enhanced"/> support this notion. + <itemizedlist spacing="compact"> + <listitem> + <para> + <literal>none</literal> (generally this is the default if no optimizer was specified): This + says to not perform any optimizations, and hit the database each and every request. + </para> + </listitem> + <listitem> + <para> + <literal>hilo</literal>: applies a hi/lo algorithm around the database retrieved values. The + values from the database for this optimizer are expected to be sequential. The values + retrieved from the database structure for this optimizer indicates the "group number"; the + <literal>increment_size</literal> is multiplied by that value in memory to define a group + "hi value". + </para> + </listitem> + <listitem> + <para> + <literal>pooled</literal>: like was discussed for <literal>hilo</literal>, this optimizers + attempts to minimize the number of hits to the database. Here, however, we simply store + the starting value for the "next group" into the database structure rather than a sequential + value in combination with an in-memory grouping algorithm. <literal>increment_size</literal> + here refers to the values coming from the database. + </para> + </listitem> + </itemizedlist> + </para> + </sect2> <sect2 id="mapping-declaration-compositeid" revision="3"> <title>composite-id</title> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/batch.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/batch.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/batch.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="batch"> +<chapter id="batch"> <title>批量处理（Batch processing）</title> <para> 使用Hibernate将 100 000 条记录插入到数据库的一个很自然的做法可能是这样的 Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/best_practices.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/best_practices.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/best_practices.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="best-practices" revision="2"> +<chapter id="best-practices" revision="2"> <title>最佳实践(Best Practices)</title> <variablelist spacing="compact"> @@ -30,7 +30,6 @@ 对所有的实体都标识出自然键，用<literal>&lt;natural-id&gt;</literal>进行映射。实现<literal>equals()</literal>和<literal>hashCode()</literal>，在其中用组成自然键的属性进行比较。 </para> </listitem> - Y00008051221000980 2.7，89，100万 </varlistentry> <varlistentry> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/collection_mapping.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/collection_mapping.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/collection_mapping.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,21 +1,17 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> - <chapter id="collections"> +<chapter id="collections"> <title>集合类(Collections)映射</title> <sect1 id="collections-persistent" revision="3"> <title>持久化集合类(Persistent collections)</title> - <para id="collections-persistent-translate-comment"> - (译者注：在阅读本章的时候，以后整个手册的阅读过程中，我们都会面临一个名词方面的问题，那就是“集合”。"Collections"和"Set"在中文里对应都被翻译为“集合”，但是他们的含义很不一样。Collections是一个超集，Set是其中的一种。大部分情况下，本译稿中泛指的未加英文注明的“集合”，都应当理解为“Collections”。在有些二者同时出现，可能造成混淆的地方，我们用“集合类”来特指“Collecions”,“集合(Set)”来指"Set"，一般都会在后面的括号中给出英文。希望大家在阅读时联系上下文理解，不要造成误解。 - 与此同时，“元素”一词对应的英文“element”，也有两个不同的含义。其一为集合的元素，是内存中的一个变量；另一含义则是XML文档中的一个标签所代表的元素。也请注意区别。 - 本章中,特别是后半部分是需要反复阅读才能理解清楚的。如果遇到任何疑问,请记住,英文版本的reference是惟一标准的参考资料。) - </para> - <para> - Hibernate要求持久化集合值字段必须声明为接口，比如： + Hibernate要求持久化集合值字段必须声明为接口，比如：(译者注：在阅读本章的时候，以后整个手册的阅读过程中，我们都会面临一个名词方面的问题，那就是“集合”。"Collections"和"Set"在中文里对应都被翻译为“集合”，但是他们的含义很不一样。Collections是一个超集，Set是其中的一种。大部分情况下，本译稿中泛指的未加英文注明的“集合”，都应当理解为“Collections”。在有些二者同时出现，可能造成混淆的地方，我们用“集合类”来特指“Collecions”,“集合(Set)”来指"Set"，一般都会在后面的括号中给出英文。希望大家在阅读时联系上下文理解，不要造成误解。 + 与此同时，“元素”一词对应的英文“element”，也有两个不同的含义。其一为集合的元素，是内存中的一个变量；另一含义则是XML文档中的一个标签所代表的元素。也请注意区别。 + 本章中,特别是后半部分是需要反复阅读才能理解清楚的。如果遇到任何疑问,请记住,英文版本的reference是惟一标准的参考资料。) </para> <programlisting><![CDATA[public class Product { @@ -725,7 +721,7 @@ </class> <class name="Item"> - <id name="id" column="ITEM_ID"/> + <id name="id" column="ITEM_ID"/> ... <!-- inverse end --> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/component_mapping.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/component_mapping.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/component_mapping.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="components"> +<chapter id="components"> <title>组件（Component）映射</title> <para> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/configuration.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/configuration.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/configuration.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="session-configuration" revision="1"> +<chapter id="session-configuration" revision="1"> <title> 配置 Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/events.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/events.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/events.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="events"> +<chapter id="events"> <title> 拦截器与事件(Interceptors and events) </title> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_mappings.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_mappings.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_mappings.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="example-mappings"> +<chapter id="example-mappings"> <title>示例：复杂映射实例</title> <para> 本章展示了一些较为复杂的关系映射。 Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_parentchild.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_parentchild.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_parentchild.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="example-parentchild"> +<chapter id="example-parentchild"> <title>示例：父子关系(Parent Child Relationships)</title> <para> 刚刚接触Hibernate的人大多是从父子关系（parent / child type relationship）的建模入手的。父子关系的建模有两种方法。由于种种原因，最方便的方法是把<literal>Parent</literal>和<literal>Child</literal>都建模成实体类，并创建一个从<literal>Parent</literal>指向<literal>Child</literal>的&lt;one-to-many&gt;关联，对新手来说尤其如此。还有一种方法，就是将<literal>Child</literal>声明为一个<literal>&lt;composite-element&gt;</literal>（组合元素）。 事实上在Hibernate中one to many关联的默认语义远没有composite element贴近parent / child关系的通常语义。下面我们会阐述如何使用<emphasis>带有级联的双向一对多关联(bidirectional one to many association with cascades)</emphasis>去建立有效、优美的parent / child关系。这一点也不难！ @@ -223,14 +223,7 @@ session.update(parent); session.flush();]]></programlisting> - <para> - Well, that's all very well for the case of a generated identifier, but what about assigned identifiers - and composite identifiers? This is more difficult, since Hibernate can't use the identifier property to - distinguish between a newly instantiated object (with an identifier assigned by the user) and an - object loaded in a previous session. In this case, Hibernate will either use the timestamp or version - property, or will actually query the second-level cache or, worst case, the database, to see if the - row exists. - </para> + <para> 这对于自动生成标识的情况是非常好的，但是自分配的标识和复合标识怎么办呢？这是有点麻烦，因为Hibernate没有办法区分新实例化的对象（标识被用户指定了）和前一个Session装入的对象。在这种情况下，Hibernate会使用timestamp或version属性，或者查询第二级缓存，或者最坏的情况，查询数据库，来确认是否此行存在。</para> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_weblog.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_weblog.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/example_weblog.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="example-weblog"> +<chapter id="example-weblog"> <title>示例：Weblog 应用程序</title> <sect1 id="example-weblog-classes"> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/filters.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/filters.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/filters.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="filters"> +<chapter id="filters"> <title>过滤数据</title> <para> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/inheritance_mapping.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/inheritance_mapping.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/inheritance_mapping.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> - <chapter id="inheritance"> +<chapter id="inheritance"> <title>继承映射(Inheritance Mappings)</title> <sect1 id="inheritance-strategies" revision="3"> @@ -266,7 +266,7 @@ </sect2> <sect2 id="inheritance-tableperconcreate-polymorphism"> - <title>Table per concrete class, using implicit polymorphism</title> + <title>每个具体类一张表，使用隐式多态</title> <para> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/performance.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/performance.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/performance.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="performance"> +<chapter id="performance"> <title>提升性能 </title> <sect1 id="performance-fetching" revision="2"> @@ -609,7 +609,7 @@ <entry>OSCache</entry> <entry><literal>org.hibernate.cache.OSCacheProvider</literal></entry> <entry>memory, disk</entry> - <entry>yes (clustered invalidation)</entry> + <entry></entry> <entry>yes</entry> </row> <row> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/persistent_classes.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/persistent_classes.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/persistent_classes.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="persistent-classes" revision="2"> +<chapter id="persistent-classes" revision="2"> <title>持久化类(Persistent Classes)</title> <para> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_criteria.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_criteria.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_criteria.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="querycriteria"> +<chapter id="querycriteria"> <title> 条件查询(Criteria Queries) </title> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_hql.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_hql.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_hql.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="queryhql"> +<chapter id="queryhql"> <title>HQL: Hibernate查询语言</title> <para> Hibernate配备了一种非常强大的查询语言，这种语言看上去很像SQL。但是不要被语法结构 @@ -191,6 +191,42 @@ <programlisting><![CDATA[from Cat as cat where cat.mate.name like '%s%']]></programlisting> </sect1> + <sect1 id="queryhql-identifier-property"> + <title>Refering to identifier property</title> + + <para> + There are, generally speaking, 2 ways to refer to an entity's identifier property: + </para> + <itemizedlist spacing="compact"> + <listitem> + <para> + The special property (lowercase) <literal>id</literal> may be used to reference the identifier + property of an entity <emphasis>provided that entity does not define a non-identifier property + named id</emphasis>. + </para> + </listitem> + <listitem> + <para> + If the entity defines a named identifier property, you may use that property name. + </para> + </listitem> + </itemizedlist> + + <para> + References to composite identifier properties follow the same naming rules. If the + entity has a non-identifier property named id, the composite identifier property can only + be referenced by its defined named; otherwise, the special <literal>id</literal> property + can be used to rerference the identifier property. + </para> + + <para> + Note: this has changed significantly starting in version 3.2.2. In previous versions, + <literal>id</literal> <emphasis>always</emphasis> referred to the identifier property no + matter what its actual name. A ramification of that decision was that non-identifier + properties named <literal>id</literal> could never be referenced in Hibernate queries. + </para> + </sect1> + <sect1 id="queryhql-select"> <title>select子句</title> @@ -505,6 +541,11 @@ 逻辑运算符<literal>and, or, not</literal> </para> </listitem> + <listitem> + <para> + Parentheses <literal>( )</literal>, indicating grouping + </para> + </listitem> <listitem> <para> <literal>in</literal>, @@ -856,32 +897,11 @@ 注意，HQL自查询只可以在select或者where子句中出现。 </para> - <para> - 在select列表中包含一个表达式以上的子查询，你可以使用一个元组构造符（tuple constructors）： + <para> + Note that subqueries can also utilize <literal>row value constructor</literal> syntax. See + <xref linkend="queryhql-tuple"/> for more details. </para> - <programlisting><![CDATA[from Cat as cat -where not ( cat.name, cat.color ) in ( - select cat.name, cat.color from DomesticCat cat -)]]></programlisting> - - <para> - 注意在某些数据库中（不包括Oracle与HSQL），你也可以在其他语境中使用元组构造符， - 比如查询用户类型的组件与组合： - </para> - - <programlisting><![CDATA[from Person where name = ('Gavin', 'A', 'King')]]></programlisting> - - <para> - 该查询等价于更复杂的： - </para> - - <programlisting><![CDATA[from Person where name.first = 'Gavin' and name.initial = 'A' and name.last = 'King')]]></programlisting> - - <para> - 有两个很好的理由使你不应当作这样的事情：首先，它不完全适用于各个数据库平台；其次，查询现在依赖于映射文件中属性的顺序。 - </para> - </sect1> <sect1 id="queryhql-examples"> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_sql.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_sql.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/query_sql.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="querysql" revision="2"> +<chapter id="querysql" revision="2"> <title>Native SQL查询</title> <para> 你也可以使用你的数据库的Native SQL语言来查询数据。这对你在要使用数据库的某些特性的时候(比如说在查询提示或者Oracle中的 @@ -460,7 +460,7 @@ FROM PERSON person WHERE person.NAME LIKE :name </sql-query> ]]></programlisting> - <literal>&lt;return-property&gt;</literal>也可用于多个字段,它解决了使用<literal>{}</literal>-语法不能细粒度控制多个字段的限制 +<para><literal>&lt;return-property&gt;</literal>也可用于多个字段,它解决了使用<literal>{}</literal>-语法不能细粒度控制多个字段的限制</para> <programlisting><![CDATA[<sql-query name="organizationCurrentEmployments"> <return alias="emp" class="Employment"> <return-property name="salary"> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/quickstart.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/quickstart.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/quickstart.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="quickstart"> +<chapter id="quickstart"> <title>在Tomcat中快速上手</title> <sect1 id="quickstart-intro" revision="2"> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/session_api.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/session_api.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/session_api.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="objectstate"> +<chapter id="objectstate"> <title>与对象共事</title> @@ -85,7 +85,28 @@ 你也可以按照EJB3 early draft中定义的语义，使用<literal>persist()</literal>替代<literal>save()</literal>。 </para> - + <itemizedlist spacing="compact"> + <listitem> + <para> + <literal>persist()</literal> makes a transient instance persistent. + However, it doesn't guarantee that the identifier value will be assigned to + the persistent instance immediately, the assignment might happen at flush time. + <literal>persist()</literal> also guarantees that it will not execute an + <literal>INSERT</literal> statement if it is called outside of transaction + boundaries. This is useful in long-running conversations with an extended + Session/persistence context. + </para> + </listitem> + <listitem> + <para> + <literal>save()</literal> does guarantee to return an identifier. If an INSERT + has to be executed to get the identifier ( e.g. "identity" generator, not + "sequence"), this INSERT happens immediately, no matter if you are inside or + outside of a transaction. This is problematic in a long-running conversation + with an extended Session/persistence context. + </para> + </listitem> + </itemizedlist> <para> 此外，你可以用一个重载版本的<literal>save()</literal>方法。 </para> @@ -190,12 +211,13 @@ </sect1> <sect1 id="objectstate-querying" revision="1"> - <title>查询</title> - <para> - 如果不知道所要寻找的对象的持久化标识，那么你需要使用查询。Hibernate支持强大且易于使用的面向对象查询语言(HQL)。 - 如果希望通过编程的方式创建查询，Hibernate提供了完善的按条件(Query By Criteria, QBC)以及按样例(Query By Example, QBE)进行查询的功能。 + <title>查询</title> + + <para> + 如果不知道所要寻找的对象的持久化标识，那么你需要使用查询。Hibernate支持强大且易于使用的面向对象查询语言(HQL)。 + 如果希望通过编程的方式创建查询，Hibernate提供了完善的按条件(Query By Criteria, QBC)以及按样例(Query By Example, QBE)进行查询的功能。 你也可以用原生SQL(native SQL)描述查询，Hibernate额外提供了将结果集(result set)转化为对象的支持。 - </para> + </para> <sect2 id="objectstate-querying-executing" revision="1"> <title>执行查询</title> @@ -277,8 +299,8 @@ while ( kittensAndMothers.hasNext() ) { Object[] tuple = (Object[]) kittensAndMothers.next(); - Cat kitten = (Cat) tuple[0]; - Cat mother = (Cat) tuple[1]; + Cat kitten = (Cat) tuple[0]; + Cat mother = (Cat) tuple[1]; .... }]]></programlisting> @@ -520,16 +542,16 @@ 如果你选择使用Hibernate的API, 你必须把SQL别名用大括号包围起来: </para> - <programlisting><![CDATA[List cats = session.createSQLQuery("SELECT {cat.*} FROM CAT {cat} WHERE ROWNUM<10") - .addEntity("cat", Cat.class) -.list();]]></programlisting> - - <programlisting><![CDATA[List cats = session.createSQLQuery( - "SELECT {cat}.ID AS {cat.id}, {cat}.SEX AS {cat.sex}, " + - "{cat}.MATE AS {cat.mate}, {cat}.SUBCLASS AS {cat.class}, ... " + - "FROM CAT {cat} WHERE ROWNUM<10") - .addEntity("cat", Cat.class) -.list()]]></programlisting> + <programlisting><![CDATA[List cats = session.createSQLQuery("SELECT {cat.*} FROM CAT {cat} WHERE ROWNUM<10") + .addEntity("cat", Cat.class) +.list();]]></programlisting> + + <programlisting><![CDATA[List cats = session.createSQLQuery( + "SELECT {cat}.ID AS {cat.id}, {cat}.SEX AS {cat.sex}, " + + "{cat}.MATE AS {cat.mate}, {cat}.SUBCLASS AS {cat.class}, ... " + + "FROM CAT {cat} WHERE ROWNUM<10") + .addEntity("cat", Cat.class) +.list()]]></programlisting> <para> 和Hibernate查询一样，SQL查询也可以包含命名参数和占位参数。 Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/toolset_guide.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/toolset_guide.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/toolset_guide.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -185,12 +185,6 @@ <entry><literal>foreign-key</literal></entry> <entry><literal>foreign_key_name</literal></entry> <entry> - specifies the name of the foreign key constraint generated - for an association, for a <literal>&lt;one-to-one&gt;</literal>, - <literal>&lt;many-to-one&gt;</literal>, <literal>&lt;key&gt;</literal>, - or <literal>&lt;many-to-many&gt;</literal> mapping element. Note that - <literal>inverse="true"</literal> sides will not be considered - by <literal>SchemaExport</literal>. 指明一个外键的名字，它是为关联生成的，或者<literal>&lt;one-to-one&gt;</literal>，<literal>&lt;many-to-one&gt;</literal>, <literal>&lt;key&gt;</literal>, 或者<literal>&lt;many-to-many&gt;</literal>映射元素。注意<literal>inverse="true"</literal>在<literal>SchemaExport</literal>时会被忽略。 </entry> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/transactions.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/transactions.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/transactions.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="transactions" revision="2"> +<chapter id="transactions" revision="2"> <title>事务和并发</title> <para> Hibernate的事务和并发控制很容易掌握。Hibernate直接使用JDBC连接和JTA资源，不添加任何附加锁定 Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/tutorial.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/tutorial.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/tutorial.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="tutorial"> +<chapter id="tutorial"> <title> Hibernate入门 </title> Modified: core/trunk/documentation/manual/zh-CN/src/main/docbook/content/xml.xml =================================================================== --- core/trunk/documentation/manual/zh-CN/src/main/docbook/content/xml.xml 2007-10-26 00:48:48 UTC (rev 14136) +++ core/trunk/documentation/manual/zh-CN/src/main/docbook/content/xml.xml 2007-10-26 00:57:21 UTC (rev 14137) @@ -1,7 +1,7 @@ <?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> -<chapter id="xml"> +<chapter id="xml"> <title>XML映射</title> <para><emphasis> 注意这是Hibernate 3.0的一个实验性的特性。这一特性仍在积极开发中。