| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <!-- NewPage --> |
| <html lang="en"> |
| <head> |
| <title>DiscriminatorValue</title> |
| <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style"> |
| <script type="text/javascript" src="../../script.js"></script> |
| |
| <link rel="shortcut icon" href="/img/jakarta-favicon.ico"> |
| </head> |
| <body> |
| <script type="text/javascript"><!-- |
| try { |
| if (location.href.indexOf('is-external=true') == -1) { |
| parent.document.title="DiscriminatorValue"; |
| } |
| } |
| catch(err) { |
| } |
| //--> |
| </script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="topNav"><a name="navbar.top"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.top.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../index-all.html">Index</a></li> |
| <li><a href="../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../jakarta/persistence/DiscriminatorType.html" title="enum in jakarta.persistence"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../jakarta/persistence/ElementCollection.html" title="annotation in jakarta.persistence"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../index.html?jakarta/persistence/DiscriminatorValue.html" target="_top">Frames</a></li> |
| <li><a href="DiscriminatorValue.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_top"> |
| <li><a href="../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_top"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li>Field | </li> |
| <li><a href="#annotation.type.required.element.summary">Required</a> | </li> |
| <li>Optional</li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li>Field | </li> |
| <li><a href="#annotation.type.element.detail">Element</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.top"> |
| <!-- --> |
| </a></div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| <!-- ======== START OF CLASS DATA ======== --> |
| <div class="header"> |
| <div class="subTitle">jakarta.persistence</div> |
| <h2 title="Annotation Type DiscriminatorValue" class="title">Annotation Type DiscriminatorValue</h2> |
| </div> |
| <div class="contentContainer"> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <hr> |
| <br> |
| <pre>@Target(value=TYPE) |
| @Retention(value=RUNTIME) |
| public @interface <span class="memberNameLabel">DiscriminatorValue</span></pre> |
| <div class="block">Specifies the value of the discriminator column for |
| entities of the given type. |
| |
| <p> The <code>DiscriminatorValue</code> |
| annotation can only be specified on a concrete entity |
| class. |
| |
| <p> If the <code>DiscriminatorValue</code> annotation is not |
| specified and a discriminator column is used, a provider-specific |
| function will be used to generate a value representing the |
| entity type. If the <a href="../../jakarta/persistence/DiscriminatorType.html" title="enum in jakarta.persistence"><code>DiscriminatorType</code></a> is <code> |
| STRING</code>, the discriminator value |
| default is the entity name. |
| |
| <p> The inheritance strategy and the discriminator column |
| are only specified in the root of an entity class hierarchy |
| or subhierarchy in which a different inheritance strategy is |
| applied. The discriminator value, if not defaulted, should be |
| specified for each entity class in the hierarchy. |
| |
| <pre> |
| |
| Example: |
| |
| @Entity |
| @Table(name="CUST") |
| @Inheritance(strategy=SINGLE_TABLE) |
| @DiscriminatorColumn(name="DISC", discriminatorType=STRING, length=20) |
| @DiscriminatorValue("CUSTOMER") |
| public class Customer { ... } |
| |
| @Entity |
| @DiscriminatorValue("VCUSTOMER") |
| public class ValuedCustomer extends Customer { ... } |
| </pre></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.0</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../jakarta/persistence/DiscriminatorColumn.html" title="annotation in jakarta.persistence"><code>DiscriminatorColumn</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- =========== ANNOTATION TYPE REQUIRED MEMBER SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="annotation.type.required.element.summary"> |
| <!-- --> |
| </a> |
| <h3>Required Element Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Required Element Summary table, listing required elements, and an explanation"> |
| <caption><span>Required Elements</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Required Element and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>java.lang.String</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../jakarta/persistence/DiscriminatorValue.html#value--">value</a></span></code> |
| <div class="block">(Optional) The value that indicates that the |
| row is an entity of the annotated entity type.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ ANNOTATION TYPE MEMBER DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="annotation.type.element.detail"> |
| <!-- --> |
| </a> |
| <h3>Element Detail</h3> |
| <a name="value--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>value</h4> |
| <pre>public abstract java.lang.String value</pre> |
| <div class="block">(Optional) The value that indicates that the |
| row is an entity of the annotated entity type. |
| |
| <p> If the <code>DiscriminatorValue</code> annotation is not |
| specified and a discriminator column is used, a |
| provider-specific function will be used to generate a value |
| representing the entity type. If the <code>DiscriminatorType</code> is |
| <code>STRING</code>, the discriminator value default is the |
| entity name.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <!-- ========= END OF CLASS DATA ========= --> |
| <!-- ======= START OF BOTTOM NAVBAR ====== --> |
| <div class="bottomNav"><a name="navbar.bottom"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.bottom.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../index-all.html">Index</a></li> |
| <li><a href="../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../jakarta/persistence/DiscriminatorType.html" title="enum in jakarta.persistence"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../jakarta/persistence/ElementCollection.html" title="annotation in jakarta.persistence"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../index.html?jakarta/persistence/DiscriminatorValue.html" target="_top">Frames</a></li> |
| <li><a href="DiscriminatorValue.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_bottom"> |
| <li><a href="../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_bottom"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li>Field | </li> |
| <li><a href="#annotation.type.required.element.summary">Required</a> | </li> |
| <li>Optional</li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li>Field | </li> |
| <li><a href="#annotation.type.element.detail">Element</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.bottom"> |
| <!-- --> |
| </a></div> |
| <!-- ======== END OF BOTTOM NAVBAR ======= --> |
| </body> |
| </html> |