persistent_classes.po

hibernate 开源框架的代码 jar包希望大家能喜欢

msgid ""
msgstr ""
"Project-Id-Version: PACKAGE VERSION\n"
"Report-Msgid-Bugs-To: http://bugs.kde.org\n"
"POT-Creation-Date: 2007-10-25 07:47+0000\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <[e-mail]>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"

#. Tag: title
#: persistent_classes.xml:5
#, no-c-format
msgid "Persistent Classes"
msgstr "Persistent Classes"

#. Tag: para
#: persistent_classes.xml:7
#, no-c-format
msgid ""
"Persistent classes are classes in an application that implement the entities "
"of the business problem (e.g. Customer and Order in an E-commerce "
"application). Not all instances of a persistent class are considered to be "
"in the persistent state - an instance may instead be transient or detached."
msgstr ""
"Persistent classes are classes in an application that implement the entities "
"of the business problem (e.g. Customer and Order in an E-commerce "
"application). Not all instances of a persistent class are considered to be "
"in the persistent state - an instance may instead be transient or detached."

#. Tag: para
#: persistent_classes.xml:14
#, no-c-format
msgid ""
"Hibernate works best if these classes follow some simple rules, also known "
"as the Plain Old Java Object (POJO) programming model. However, none of "
"these rules are hard requirements. Indeed, Hibernate3 assumes very little "
"about the nature of your persistent objects. You may express a domain model "
"in other ways: using trees of <literal>Map</literal> instances, for example."
msgstr ""
"Hibernate works best if these classes follow some simple rules, also known "
"as the Plain Old Java Object (POJO) programming model. However, none of "
"these rules are hard requirements. Indeed, Hibernate3 assumes very little "
"about the nature of your persistent objects. You may express a domain model "
"in other ways: using trees of <literal>Map</literal> instances, for example."

#. Tag: title
#: persistent_classes.xml:23
#, no-c-format
msgid "A simple POJO example"
msgstr "A simple POJO example"

#. Tag: para
#: persistent_classes.xml:25
#, no-c-format
msgid "Most Java applications require a persistent class representing felines."
msgstr ""
"Most Java applications require a persistent class representing felines."

#. Tag: programlisting
#: persistent_classes.xml:29
#, no-c-format
msgid ""
"<![CDATA[package eg;\n"
"import java.util.Set;\n"
"import java.util.Date;\n"
"\n"
"public class Cat {\n"
"    private Long id; // identifier\n"
"\n"
"    private Date birthdate;\n"
"    private Color color;\n"
"    private char sex;\n"
"    private float weight;\n"
"    private int litterId;\n"
"\n"
"    private Cat mother;\n"
"    private Set kittens = new HashSet();\n"
"\n"
"    private void setId(Long id) {\n"
"        this.id=id;\n"
"    }\n"
"    public Long getId() {\n"
"        return id;\n"
"    }\n"
"\n"
"    void setBirthdate(Date date) {\n"
"        birthdate = date;\n"
"    }\n"
"    public Date getBirthdate() {\n"
"        return birthdate;\n"
"    }\n"
"\n"
"    void setWeight(float weight) {\n"
"        this.weight = weight;\n"
"    }\n"
"    public float getWeight() {\n"
"        return weight;\n"
"    }\n"
"\n"
"    public Color getColor() {\n"
"        return color;\n"
"    }\n"
"    void setColor(Color color) {\n"
"        this.color = color;\n"
"    }\n"
"\n"
"    void setSex(char sex) {\n"
"        this.sex=sex;\n"
"    }\n"
"    public char getSex() {\n"
"        return sex;\n"
"    }\n"
"\n"
"    void setLitterId(int id) {\n"
"        this.litterId = id;\n"
"    }\n"
"    public int getLitterId() {\n"
"        return litterId;\n"
"    }\n"
"\n"
"    void setMother(Cat mother) {\n"
"        this.mother = mother;\n"
"    }\n"
"    public Cat getMother() {\n"
"        return mother;\n"
"    }\n"
"    void setKittens(Set kittens) {\n"
"        this.kittens = kittens;\n"
"    }\n"
"    public Set getKittens() {\n"
"        return kittens;\n"
"    }\n"
"    \n"
"    // addKitten not needed by Hibernate\n"
"    public void addKitten(Cat kitten) {\n"
"            kitten.setMother(this);\n"
"        kitten.setLitterId( kittens.size() ); \n"
"        kittens.add(kitten);\n"
"    }\n"
"}]]>"
msgstr ""

#. Tag: para
#: persistent_classes.xml:31
#, no-c-format
msgid "There are four main rules to follow here:"
msgstr "There are four main rules to follow here:"

#. Tag: title
#: persistent_classes.xml:37
#, no-c-format
msgid "Implement a no-argument constructor"
msgstr "Implement a no-argument constructor"

#. Tag: para
#: persistent_classes.xml:39
#, no-c-format
msgid ""
"<literal>Cat</literal> has a no-argument constructor. All persistent classes "
"must have a default constructor (which may be non-public) so that Hibernate "
"can instantiate them using <literal>Constructor.newInstance()</literal>. We "
"strongly recommend having a default constructor with at least "
"<emphasis>package</emphasis> visibility for runtime proxy generation in "
"Hibernate."
msgstr ""
"<literal>Cat</literal> has a no-argument constructor. All persistent classes "
"must have a default constructor (which may be non-public) so that Hibernate "
"can instantiate them using <literal>Constructor.newInstance()</literal>. We "
"strongly recommend having a default constructor with at least "
"<emphasis>package</emphasis> visibility for runtime proxy generation in "
"Hibernate."

#. Tag: title
#: persistent_classes.xml:49
#, no-c-format
msgid "Provide an identifier property (optional)"
msgstr "Provide an identifier property (optional)"

#. Tag: para
#: persistent_classes.xml:51
#, no-c-format
msgid ""
"<literal>Cat</literal> has a property called <literal>id</literal>. This "
"property maps to the primary key column of a database table. The property "
"might have been called anything, and its type might have been any primitive "
"type, any primitive \"wrapper\" type, <literal>java.lang.String</literal> or "
"<literal>java.util.Date</literal>. (If your legacy database table has "
"composite keys, you can even use a user-defined class with properties of "
"these types - see the section on composite identifiers later.)"
msgstr ""
"<literal>Cat</literal> has a property called <literal>id</literal>. This "
"property maps to the primary key column of a database table. The property "
"might have been called anything, and its type might have been any primitive "
"type, any primitive \"wrapper\" type, <literal>java.lang.String</literal> or "
"<literal>java.util.Date</literal>. (If your legacy database table has "
"composite keys, you can even use a user-defined class with properties of "
"these types - see the section on composite identifiers later.)"

#. Tag: para
#: persistent_classes.xml:60
#, no-c-format
msgid ""
"The identifier property is strictly optional. You can leave them off and let "
"Hibernate keep track of object identifiers internally. We do not recommend "
"this, however."
msgstr ""
"The identifier property is strictly optional. You can leave them off and let "
"Hibernate keep track of object identifiers internally. We do not recommend "
"this, however."

#. Tag: para
#: persistent_classes.xml:65
#, no-c-format
msgid ""
"In fact, some functionality is available only to classes which declare an "
"identifier property:"
msgstr ""
"In fact, some functionality is available only to classes which declare an "
"identifier property:"

#. Tag: para
#: persistent_classes.xml:72
#, fuzzy, no-c-format
msgid ""
"Transitive reattachment for detached objects (cascade update or cascade "
"merge) - see"
msgstr ""
"Transitive reattachment for detached objects (cascade update or cascade "
"merge) - see <xref linkend=\"objectstate-transitive\"/>"

#. Tag: literal
#: persistent_classes.xml:79
#, no-c-format
msgid "Session.saveOrUpdate()"
msgstr "Session.saveOrUpdate()"

#. Tag: literal
#: persistent_classes.xml:84
#, no-c-format
msgid "Session.merge()"
msgstr "Session.merge()"

#. Tag: para
#: persistent_classes.xml:89
#, no-c-format
msgid ""
"We recommend you declare consistently-named identifier properties on "
"persistent classes. We further recommend that you use a nullable (ie. non-"
"primitive) type."
msgstr ""
"We recommend you declare consistently-named identifier properties on "
"persistent classes. We further recommend that you use a nullable (ie. non-"
"primitive) type."

#. Tag: title
#: persistent_classes.xml:96
#, no-c-format
msgid "Prefer non-final classes (optional)"
msgstr "Prefer non-final classes (optional)"

#. Tag: para
#: persistent_classes.xml:97
#, no-c-format
msgid ""
"A central feature of Hibernate, <emphasis>proxies</emphasis>, depends upon "
"the persistent class being either non-final, or the implementation of an "
"interface that declares all public methods."
msgstr ""
"A central feature of Hibernate, <emphasis>proxies</emphasis>, depends upon "
"the persistent class being either non-final, or the implementation of an "
"interface that declares all public methods."

#. Tag: para
#: persistent_classes.xml:102
#, no-c-format
msgid ""
"You can persist <literal>final</literal> classes that do not implement an "
"interface with Hibernate, but you won't be able to use proxies for lazy "
"association fetching - which will limit your options for performance tuning."
msgstr ""
"You can persist <literal>final</literal> classes that do not implement an "
"interface with Hibernate, but you won't be able to use proxies for lazy "
"association fetching - which will limit your options for performance tuning."