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| <h1 class="page">FactoryService <em>(interface)</em></h1> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Collects together methods for instantiating domain objects, also injecting them with any domain services and calling lifecycle methods if defined.</p> |
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| <div class="title">FactoryService.java</div> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">interface FactoryService { |
| T getOrCreate(Class<T> requiredType) <i class="conum" data-value="1"></i><b>(1)</b> |
| T get(Class<T> requiredType) <i class="conum" data-value="2"></i><b>(2)</b> |
| T detachedEntity(Class<T> domainClass) <i class="conum" data-value="3"></i><b>(3)</b> |
| T detachedEntity(T entity) <i class="conum" data-value="4"></i><b>(4)</b> |
| T mixin(Class<T> mixinClass, Object mixedIn) <i class="conum" data-value="5"></i><b>(5)</b> |
| T viewModel(Class<T> viewModelClass, String mementoStr) <i class="conum" data-value="6"></i><b>(6)</b> |
| T viewModel(Class<T> viewModelClass) <i class="conum" data-value="7"></i><b>(7)</b> |
| T viewModel(T viewModel) <i class="conum" data-value="8"></i><b>(8)</b> |
| T create(Class<T> domainClass) <i class="conum" data-value="9"></i><b>(9)</b> |
| T instantiate(Class<T> domainClass) <i class="conum" data-value="10"></i><b>(10)</b> |
| }</code></pre> |
| </div> |
| </div> |
| <div class="colist arabic"> |
| <table> |
| <tr> |
| <td><i class="conum" data-value="1"></i><b>1</b></td> |
| <td><a href="#getOrCreate__Class">getOrCreate(Class)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Gets an instance (possibly shared or independent) of the specified type, with injection points resolved and any life-cycle callback processed.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="2"></i><b>2</b></td> |
| <td><a href="#get__Class">get(Class)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Gets an instance (possibly shared or independent) of the specified <em>requiredType</em> , with injection points resolved and any life-cycle callback processed.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="3"></i><b>3</b></td> |
| <td><a href="#detachedEntity__Class">detachedEntity(Class)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Creates a new detached entity instance, with injection points resolved and defaults applied.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="4"></i><b>4</b></td> |
| <td><a href="#detachedEntity__T">detachedEntity(T)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Creates a new detached entity instance, with injection points resolved.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="5"></i><b>5</b></td> |
| <td><a href="#mixin__Class_Object">mixin(Class, Object)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Creates a new Mixin instance, with injection points resolved.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="6"></i><b>6</b></td> |
| <td><a href="#viewModel__Class_String">viewModel(Class, String)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Creates a new ViewModel instance, with injection points resolved, and initialized according to the given <em>mementoStr</em></p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="7"></i><b>7</b></td> |
| <td><a href="#viewModel__Class">viewModel(Class)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Creates a new ViewModel instance, with injection points resolved and defaults applied.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="8"></i><b>8</b></td> |
| <td><a href="#viewModel__T">viewModel(T)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Resolves injection points for given ViewModel instance.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="9"></i><b>9</b></td> |
| <td><a href="#create__Class">create(Class)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Creates a new instance of the specified class, with injection points resolved and defaults applied.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| <tr> |
| <td><i class="conum" data-value="10"></i><b>10</b></td> |
| <td><a href="#instantiate__Class">instantiate(Class)</a> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="admonitionblock warning"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <i class="fa icon-warning" title="Warning"></i> |
| </td> |
| <td class="content"> |
| <div class="paragraph"> |
| <p><span class="red"><em>deprecated:</em></span></p> |
| </div> |
| <div class="paragraph"> |
| <p>with semantic changes since 2.0 previous behavior is no longer guaranteed, instead consider use of @ <em>#detachedEntity(Class)</em> or <em>#getOrCreate(Class)</em> if applicable</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="paragraph"> |
| <p>Creates a new instance of the specified class, but does not persist it.</p> |
| </div> |
| </div> |
| </div></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="members"><a class="anchor" href="#members"></a>Members</h2> |
| <div class="sectionbody"> |
| <div class="sect2"> |
| <h3 id="getOrCreate__Class"><a class="anchor" href="#getOrCreate__Class"></a>getOrCreate(Class)</h3> |
| <div class="paragraph"> |
| <p>Gets an instance (possibly shared or independent) of the specified type, with injection points resolved and any life-cycle callback processed.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="get__Class"><a class="anchor" href="#get__Class"></a>get(Class)</h3> |
| <div class="paragraph"> |
| <p>Gets an instance (possibly shared or independent) of the specified <em>requiredType</em> , with injection points resolved and any life-cycle callback processed.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="detachedEntity__Class"><a class="anchor" href="#detachedEntity__Class"></a>detachedEntity(Class)</h3> |
| <div class="paragraph"> |
| <p>Creates a new detached entity instance, with injection points resolved and defaults applied.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The entity will be detacted, in other words not yet persisted.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="detachedEntity__T"><a class="anchor" href="#detachedEntity__T"></a>detachedEntity(T)</h3> |
| <div class="paragraph"> |
| <p>Creates a new detached entity instance, with injection points resolved.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="mixin__Class_Object"><a class="anchor" href="#mixin__Class_Object"></a>mixin(Class, Object)</h3> |
| <div class="paragraph"> |
| <p>Creates a new Mixin instance, with injection points resolved.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="viewModel__Class_String"><a class="anchor" href="#viewModel__Class_String"></a>viewModel(Class, String)</h3> |
| <div class="paragraph"> |
| <p>Creates a new ViewModel instance, with injection points resolved, and initialized according to the given <em>mementoStr</em></p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="viewModel__Class"><a class="anchor" href="#viewModel__Class"></a>viewModel(Class)</h3> |
| <div class="paragraph"> |
| <p>Creates a new ViewModel instance, with injection points resolved and defaults applied.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="viewModel__T"><a class="anchor" href="#viewModel__T"></a>viewModel(T)</h3> |
| <div class="paragraph"> |
| <p>Resolves injection points for given ViewModel instance.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="create__Class"><a class="anchor" href="#create__Class"></a>create(Class)</h3> |
| <div class="paragraph"> |
| <p>Creates a new instance of the specified class, with injection points resolved and defaults applied.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="instantiate__Class"><a class="anchor" href="#instantiate__Class"></a>instantiate(Class)</h3> |
| <div class="admonitionblock warning"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <i class="fa icon-warning" title="Warning"></i> |
| </td> |
| <td class="content"> |
| <div class="paragraph"> |
| <p><span class="red"><em>deprecated:</em></span></p> |
| </div> |
| <div class="paragraph"> |
| <p>with semantic changes since 2.0 previous behavior is no longer guaranteed, instead consider use of @ <em>#detachedEntity(Class)</em> or <em>#getOrCreate(Class)</em> if applicable</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="paragraph"> |
| <p>Creates a new instance of the specified class, but does not persist it.</p> |
| </div> |
| <div class="paragraph"> |
| <p>It is recommended that the object be initially instantiated using this method, though the framework will also handle the case when the object is simply <em>new()</em> ed up. The benefits of using <em>#instantiate(Class)</em> are:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>any services will be injected into the object immediately (otherwise they will not be injected until the framework becomes aware of the object, typically when it is <em>RepositoryService#persist(Object) persist</em> ed</p> |
| </li> |
| <li> |
| <p>the default value for any properties (usually as specified by <code>default <em>Xxx</em> ()</code> supporting methods) will (since 2.0) be used</p> |
| </li> |
| <li> |
| <p>the <code>created()</code> callback will not be called.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>The corollary is: if your code never uses <code>default <em>Xxx</em> ()</code> supporting methods or the <code>created()</code> callback, then you can alternatively just <em>new()</em> up the object rather than call this method.</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="implementation"><a class="anchor" href="#implementation"></a>Implementation</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>The core framework provides a default implementation of this service (<code>o.a.i.core.metamodel.services.factory.FactoryServiceDefault</code>).</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="usage"><a class="anchor" href="#usage"></a>Usage</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>The benefits of using this method (instead of simply using the Java <code>new</code> keyword) are:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>any services will be injected into the object immediately (otherwise they will not be injected until the framework becomes aware of the object, typically when it is persisted through the <a href="../repository/RepositoryService.html" class="page">RepositoryService</a></p> |
| </li> |
| <li> |
| <p>the default value for any properties (usually as specified by <code>defaultXxx()</code> supporting methods) or from the value type itself will be set and the <code>created()</code> callback will be called.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>An alternative idiom is to just <code>new</code> up the object and then use <a href="../inject/ServiceInjector.html" class="page">ServiceInjector</a> domain service can be used to inject services into the domain object. |
| Note though that no default values will be set on the created object.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="example"><a class="anchor" href="#example"></a>Example</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>For example:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">Customer cust = factoryService.detachedEntity(Customer.class); |
| cust.setFirstName("Freddie"); |
| cust.setLastName("Mercury"); |
| repositoryService.persist(cust);</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="related-services"><a class="anchor" href="#related-services"></a>Related Services</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>See also:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>The <a href="../repository/RepositoryService.html" class="page">RepositoryService</a> is often used in conjunction with the <code>FactoryService</code>, to persist domain objects after they have been instantiated and populated.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
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