component_mapping.po

hibernate 开源框架的代码 jar包希望大家能喜欢

msgid ""
"<![CDATA[<class name=\"eg.Order\" .... >\n"
"    ....\n"
"    <set name=\"purchasedItems\" table=\"purchase_items\" lazy=\"true\">\n"
"        <key column=\"order_id\">\n"
"        <composite-element class=\"eg.Purchase\">\n"
"            <property name=\"purchaseDate\"/>\n"
"            <property name=\"price\"/>\n"
"            <property name=\"quantity\"/>\n"
"            <many-to-one name=\"item\" class=\"eg.Item\"/> <!-- class "
"attribute is optional -->\n"
"        </composite-element>\n"
"    </set>\n"
"</class>]]>"
msgstr ""

#. Tag: para
#: component_mapping.xml:125
#, no-c-format
msgid ""
"Of course, there can't be a reference to the purchae on the other side, for "
"bidirectional association navigation. Remember that components are value "
"types and don't allow shared references. A single <literal>Purchase</"
"literal> can be in the set of an <literal>Order</literal>, but it can't be "
"referenced by the <literal>Item</literal> at the same time."
msgstr ""
"当然，当你定义Item时，你无法引用这些purchase，因此你无法实现双向关联查询。记"
"住组件是值类型，并且不允许共享引用。某一个特定的<literal>Purchase</literal> "
"可以放在<literal>Order</literal>的集合中，但它不能同时被<literal>Item</"
"literal>所引用。"

#. Tag: para
#: component_mapping.xml:133
#, no-c-format
msgid "Even ternary (or quaternary, etc) associations are possible:"
msgstr "其实组合元素的这个用法可以扩展到三重或多重关联:"

#. Tag: programlisting
#: component_mapping.xml:135
#, no-c-format
msgid ""
"<![CDATA[<class name=\"eg.Order\" .... >\n"
"    ....\n"
"    <set name=\"purchasedItems\" table=\"purchase_items\" lazy=\"true\">\n"
"        <key column=\"order_id\">\n"
"        <composite-element class=\"eg.OrderLine\">\n"
"            <many-to-one name=\"purchaseDetails class=\"eg.Purchase\"/>\n"
"            <many-to-one name=\"item\" class=\"eg.Item\"/>\n"
"        </composite-element>\n"
"    </set>\n"
"</class>]]>"
msgstr ""

#. Tag: para
#: component_mapping.xml:137
#, no-c-format
msgid ""
"Composite elements may appear in queries using the same syntax as "
"associations to other entities."
msgstr "在查询中，表达组合元素的语法和关联到其他实体的语法是一样的。"

#. Tag: title
#: component_mapping.xml:145
#, no-c-format
msgid "Components as Map indices"
msgstr "组件作为Map的索引（Components as Map indices ）"

#. Tag: para
#: component_mapping.xml:147
#, no-c-format
msgid ""
"The <literal>&lt;composite-map-key&gt;</literal> element lets you map a "
"component class as the key of a <literal>Map</literal>. Make sure you "
"override <literal>hashCode()</literal> and <literal>equals()</literal> "
"correctly on the component class."
msgstr ""
"<literal>&lt;composite-map-key&gt;</literal>元素允许你映射一个组件类作为一个"
"<literal>Map</literal>的key，前提是你必须正确的在这个类中重写了"
"<literal>hashCode()</literal> 和 <literal>equals()</literal>方法。"

#. Tag: title
#: component_mapping.xml:156
#, no-c-format
msgid "Components as composite identifiers"
msgstr "组件作为联合标识符(Components as composite identifiers)"

#. Tag: para
#: component_mapping.xml:158
#, no-c-format
msgid ""
"You may use a component as an identifier of an entity class. Your component "
"class must satisfy certain requirements:"
msgstr ""
"你可以使用一个组件作为一个实体类的标识符。 你的组件类必须满足以下要求："

#. Tag: para
#: component_mapping.xml:165
#, no-c-format
msgid "It must implement <literal>java.io.Serializable</literal>."
msgstr "它必须实现<literal>java.io.Serializable</literal>接口"

#. Tag: para
#: component_mapping.xml:170
#, no-c-format
msgid ""
"It must re-implement <literal>equals()</literal> and <literal>hashCode()</"
"literal>, consistently with the database's notion of composite key equality."
msgstr ""
"它必须重新实现<literal>equals()</literal>和<literal>hashCode()</literal>方"
"法, 始终和组合关键字在数据库中的概念保持一致"

#. Tag: emphasis
#: component_mapping.xml:179
#, no-c-format
msgid ""
"Note: in Hibernate3, the second requirement is not an absolutely hard "
"requirement of Hibernate. But do it anyway."
msgstr ""
"注意：在Hibernate3中，第二个要求并非是Hibernate强制必须的。但最好这样做。"

#. Tag: para
#: component_mapping.xml:183
#, no-c-format
msgid ""
"You can't use an <literal>IdentifierGenerator</literal> to generate "
"composite keys. Instead the application must assign its own identifiers."
msgstr ""
"你不能使用一个<literal>IdentifierGenerator</literal>产生组合关键字。一个应用"
"程序必须分配它自己的标识符。"

#. Tag: para
#: component_mapping.xml:188
#, no-c-format
msgid ""
"Use the <literal>&lt;composite-id&gt;</literal> tag (with nested "
"<literal>&lt;key-property&gt;</literal> elements) in place of the usual "
"<literal>&lt;id&gt;</literal> declaration. For example, the "
"<literal>OrderLine</literal> class has a primary key that depends upon the "
"(composite) primary key of <literal>Order</literal>."
msgstr ""
"使用<literal>&lt;composite-id&gt;</literal> 标签(并且内嵌<literal>&lt;key-"
"property&gt;</literal>元素)代替通常的<literal>&lt;id&gt;</literal>标签。比如,"
"<literal>OrderLine</literal>类具有一个主键，这个主键依赖于<literal>Order</"
"literal>的(联合)主键。"

#. Tag: programlisting
#: component_mapping.xml:196
#, no-c-format
msgid ""
"<![CDATA[<class name=\"OrderLine\">\n"
"    \n"
"    <composite-id name=\"id\" class=\"OrderLineId\">\n"
"        <key-property name=\"lineId\"/>\n"
"        <key-property name=\"orderId\"/>\n"
"        <key-property name=\"customerId\"/>\n"
"    </composite-id>\n"
"    \n"
"    <property name=\"name\"/>\n"
"    \n"
"    <many-to-one name=\"order\" class=\"Order\"\n"
"            insert=\"false\" update=\"false\">\n"
"        <column name=\"orderId\"/>\n"
"        <column name=\"customerId\"/>\n"
"    </many-to-one>\n"
"    ....\n"
"    \n"
"</class>]]>"
msgstr ""

#. Tag: para
#: component_mapping.xml:198
#, no-c-format
msgid ""
"Now, any foreign keys referencing the <literal>OrderLine</literal> table are "
"also composite. You must declare this in your mappings for other classes. An "
"association to <literal>OrderLine</literal> would be mapped like this:"
msgstr ""
"现在，任何指向<literal>OrderLine</literal>的外键都是复合的。在你的映射文件"
"中，必须为其他类也这样声明。例如，一个指向<literal>OrderLine</literal>的关联"
"可能被这样映射："

#. Tag: programlisting
#: component_mapping.xml:204
#, no-c-format
msgid ""
"<![CDATA[<many-to-one name=\"orderLine\" class=\"OrderLine\">\n"
"<!-- the \"class\" attribute is optional, as usual -->\n"
"    <column name=\"lineId\"/>\n"
"    <column name=\"orderId\"/>\n"
"    <column name=\"customerId\"/>\n"
"</many-to-one>]]>"
msgstr ""

#. Tag: para
#: component_mapping.xml:206
#, no-c-format
msgid ""
"(Note that the <literal>&lt;column&gt;</literal> tag is an alternative to "
"the <literal>column</literal> attribute everywhere.)"
msgstr ""
"（注意在各个地方<literal>&lt;column&gt;</literal>标签都是<literal>column</"
"literal>属性的替代写法。）"

#. Tag: para
#: component_mapping.xml:211
#, no-c-format
msgid ""
"A <literal>many-to-many</literal> association to <literal>OrderLine</"
"literal> also uses the composite foreign key:"
msgstr ""
"指向<literal>OrderLine</literal>的<literal>多对多</literal>关联也使用联合外"
"键:"

#. Tag: programlisting
#: component_mapping.xml:216
#, no-c-format
msgid ""
"<![CDATA[<set name=\"undeliveredOrderLines\">\n"
"    <key column name=\"warehouseId\"/>\n"
"    <many-to-many class=\"OrderLine\">\n"
"        <column name=\"lineId\"/>\n"
"        <column name=\"orderId\"/>\n"
"        <column name=\"customerId\"/>\n"
"    </many-to-many>\n"
"</set>]]>"
msgstr ""

#. Tag: para
#: component_mapping.xml:218
#, no-c-format
msgid ""
"The collection of <literal>OrderLine</literal>s in <literal>Order</literal> "
"would use:"
msgstr ""
"在<literal>Order</literal>中,<literal>OrderLine</literal>的集合则是这样:"

#. Tag: programlisting
#: component_mapping.xml:223
#, no-c-format
msgid ""
"<![CDATA[<set name=\"orderLines\" inverse=\"true\">\n"
"    <key>\n"
"        <column name=\"orderId\"/>\n"
"        <column name=\"customerId\"/>\n"
"    </key>\n"
"    <one-to-many class=\"OrderLine\"/>\n"
"</set>]]>"
msgstr ""

#. Tag: para
#: component_mapping.xml:225
#, no-c-format
msgid ""
"(The <literal>&lt;one-to-many&gt;</literal> element, as usual, declares no "
"columns.)"
msgstr "(与通常一样,<literal>&lt;one-to-many&gt;</literal>元素不声明任何列.)"

#. Tag: para
#: component_mapping.xml:229
#, no-c-format
msgid ""
"If <literal>OrderLine</literal> itself owns a collection, it also has a "
"composite foreign key."
msgstr "假若<literal>OrderLine</literal>本身拥有一个集合,它也具有组合外键。"

#. Tag: programlisting
#: component_mapping.xml:234
#, no-c-format
msgid ""
"<![CDATA[<class name=\"OrderLine\">\n"
"    ....\n"
"    ....\n"
"    <list name=\"deliveryAttempts\">\n"
"        <key>   <!-- a collection inherits the composite key type -->\n"
"            <column name=\"lineId\"/>\n"
"            <column name=\"orderId\"/>\n"
"            <column name=\"customerId\"/>\n"
"        </key>\n"
"        <list-index column=\"attemptId\" base=\"1\"/>\n"
"        <composite-element class=\"DeliveryAttempt\">\n"
"            ...\n"
"        </composite-element>\n"
"    </set>\n"
"</class>]]>"
msgstr ""

#. Tag: title
#: component_mapping.xml:239
#, no-c-format
msgid "Dynamic components"
msgstr "动态组件 （Dynamic components）"

#. Tag: para
#: component_mapping.xml:241
#, no-c-format
msgid "You may even map a property of type <literal>Map</literal>:"
msgstr "你甚至可以映射<literal>Map</literal>类型的属性："

#. Tag: programlisting
#: component_mapping.xml:245
#, no-c-format
msgid ""
"<![CDATA[<dynamic-component name=\"userAttributes\">\n"
"    <property name=\"foo\" column=\"FOO\" type=\"string\"/>\n"
"    <property name=\"bar\" column=\"BAR\" type=\"integer\"/>\n"
"    <many-to-one name=\"baz\" class=\"Baz\" column=\"BAZ_ID\"/>\n"
"</dynamic-component>]]>"
msgstr ""

#. Tag: para
#: component_mapping.xml:247
#, no-c-format
msgid ""
"The semantics of a <literal>&lt;dynamic-component&gt;</literal> mapping are "
"identical to <literal>&lt;component&gt;</literal>. The advantage of this "
"kind of mapping is the ability to determine the actual properties of the "
"bean at deployment time, just by editing the mapping document. Runtime "
"manipulation of the mapping document is also possible, using a DOM parser. "
"Even better, you can access (and change) Hibernate's configuration-time "
"metamodel via the <literal>Configuration</literal> object."
msgstr ""
"从<literal>&lt;dynamic-component&gt;</literal>映射的语义上来讲，它和"
"<literal>&lt;component&gt;</literal>是相同的。 这种映射类型的优点在于通过修改"
"映射文件，就可以具有在部署时检测真实属性的能力。利用一个DOM解析器，也可以在程"
"序运行时操作映射文件。 更好的是，你可以通过<literal>Configuration</literal>对"
"象来访问（或者修改）Hibernate的运行时元模型。"