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| <li>Summary: </li> |
| <li>Nested | </li> |
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| <li><a href="#constructor.summary">Constr</a> | </li> |
| <li><a href="#method.summary">Method</a></li> |
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| <li>Detail: </li> |
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| <div class="header"> |
| <div class="subTitle">org.eclipse.persistence.descriptors</div> |
| <h2 title="Class MethodClassExtractor" class="title">Class MethodClassExtractor</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../org/eclipse/persistence/descriptors/ClassExtractor.html" title="class in org.eclipse.persistence.descriptors">org.eclipse.persistence.descriptors.ClassExtractor</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.eclipse.persistence.descriptors.MethodClassExtractor</li> |
| </ul> |
| </li> |
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| <br> |
| <pre>public class <span class="typeNameLabel">MethodClassExtractor</span> |
| extends <a href="../../../../org/eclipse/persistence/descriptors/ClassExtractor.html" title="class in org.eclipse.persistence.descriptors">ClassExtractor</a></pre> |
| <div class="block"><p><b>Purpose</b>: |
| Used to allow complex inheritance support. Typically class indicators are used to define inheritance in the database, |
| however in complex cases the class type may be determined through another mechanism. |
| The method calls a static method on the descriptor class to determine the class to use for the database row.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/descriptors/InheritancePolicy.html#setClassExtractor-org.eclipse.persistence.descriptors.ClassExtractor-"><code>InheritancePolicy.setClassExtractor(org.eclipse.persistence.descriptors.ClassExtractor)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.summary"> |
| <!-- --> |
| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect">Method</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#classExtractionMethod">classExtractionMethod</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#classExtractionMethodName">classExtractionMethodName</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#descriptor">descriptor</a></span></code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
| <!-- --> |
| </a> |
| <h3>Constructor Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#MethodClassExtractor--">MethodClassExtractor</a></span>()</code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#extractClassFromRow-org.eclipse.persistence.sessions.Record-org.eclipse.persistence.sessions.Session-">extractClassFromRow</a></span>(<a href="../../../../org/eclipse/persistence/sessions/Record.html" title="interface in org.eclipse.persistence.sessions">Record</a> row, |
| <a href="../../../../org/eclipse/persistence/sessions/Session.html" title="interface in org.eclipse.persistence.sessions">Session</a> session)</code> |
| <div class="block">INTERNAL |
| Extract/compute the class from the database row and return the class.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect">Method</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#getClassExtractionMethod--">getClassExtractionMethod</a></span>()</code> |
| <div class="block">INTERNAL: |
| Return all the classExtractionMethod</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#getClassExtractionMethodName--">getClassExtractionMethodName</a></span>()</code> |
| <div class="block">PUBLIC: |
| A class extraction method can be registered with the descriptor to override the default inheritance mechanism.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#getDescriptor--">getDescriptor</a></span>()</code> |
| <div class="block">INTERNAL: |
| Return the descriptor.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#initialize-org.eclipse.persistence.descriptors.ClassDescriptor-org.eclipse.persistence.sessions.Session-">initialize</a></span>(<a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a> descriptor, |
| <a href="../../../../org/eclipse/persistence/sessions/Session.html" title="interface in org.eclipse.persistence.sessions">Session</a> session)</code> |
| <div class="block">INTERNAL: |
| Setup the default classExtractionMethod, or if one was specified by the user make sure it is valid.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#setClassExtractionMethod-java.lang.reflect.Method-">setClassExtractionMethod</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect">Method</a> classExtractionMethod)</code> |
| <div class="block">INTERNAL:</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#setClassExtractionMethodName-java.lang.String-">setClassExtractionMethodName</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> staticClassClassExtractionMethod)</code> |
| <div class="block">PUBLIC: |
| A class extraction method can be registered with the descriptor to override the default inheritance mechanism.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/MethodClassExtractor.html#setDescriptor-org.eclipse.persistence.descriptors.ClassDescriptor-">setDescriptor</a></span>(<a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a> descriptor)</code> |
| <div class="block">INTERNAL: |
| Set the descriptor.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="descriptor"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>descriptor</h4> |
| <pre>protected transient <a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a> descriptor</pre> |
| </li> |
| </ul> |
| <a name="classExtractionMethodName"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>classExtractionMethodName</h4> |
| <pre>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> classExtractionMethodName</pre> |
| </li> |
| </ul> |
| <a name="classExtractionMethod"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>classExtractionMethod</h4> |
| <pre>protected transient <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect">Method</a> classExtractionMethod</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="MethodClassExtractor--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>MethodClassExtractor</h4> |
| <pre>public MethodClassExtractor()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="getClassExtractionMethod--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getClassExtractionMethod</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect">Method</a> getClassExtractionMethod()</pre> |
| <div class="block">INTERNAL: |
| Return all the classExtractionMethod</div> |
| </li> |
| </ul> |
| <a name="getClassExtractionMethodName--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getClassExtractionMethodName</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> getClassExtractionMethodName()</pre> |
| <div class="block">PUBLIC: |
| A class extraction method can be registered with the descriptor to override the default inheritance mechanism. |
| This allows for the class indicator field to not be used, and a user defined one instead. |
| The method registered must be a static method on the class that the descriptor is for, |
| the method must take DatabaseRow as argument, and must return the class to use for that row. |
| This method will be used to decide which class to instantiate when reading from the database. |
| It is the application's responsibility to populate any typing information in the database required |
| to determine the class from the row. |
| If this method is used then the class indicator field and mapping cannot be used, |
| also the descriptor's withAllSubclasses and onlyInstances expressions must also be setup correctly.</div> |
| </li> |
| </ul> |
| <a name="setClassExtractionMethod-java.lang.reflect.Method-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setClassExtractionMethod</h4> |
| <pre>protected void setClassExtractionMethod(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect">Method</a> classExtractionMethod)</pre> |
| <div class="block">INTERNAL:</div> |
| </li> |
| </ul> |
| <a name="setClassExtractionMethodName-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setClassExtractionMethodName</h4> |
| <pre>public void setClassExtractionMethodName(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> staticClassClassExtractionMethod)</pre> |
| <div class="block">PUBLIC: |
| A class extraction method can be registered with the descriptor to override the default inheritance mechanism. |
| This allows for the class indicator field to not be used, and a user defined one instead. |
| The method registered must be a static method on the class that the descriptor is for, |
| the method must take DatabaseRow as argument, and must return the class to use for that row. |
| This method will be used to decide which class to instantiate when reading from the database. |
| It is the application's responsibility to populate any typing information in the database required |
| to determine the class from the row. |
| If this method is used then the class indicator field and mapping cannot be used, |
| also the descriptor's withAllSubclasses and onlyInstances expressions must also be setup correctly.</div> |
| </li> |
| </ul> |
| <a name="initialize-org.eclipse.persistence.descriptors.ClassDescriptor-org.eclipse.persistence.sessions.Session-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>initialize</h4> |
| <pre>public void initialize(<a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a> descriptor, |
| <a href="../../../../org/eclipse/persistence/sessions/Session.html" title="interface in org.eclipse.persistence.sessions">Session</a> session) |
| throws <a href="../../../../org/eclipse/persistence/exceptions/DescriptorException.html" title="class in org.eclipse.persistence.exceptions">DescriptorException</a></pre> |
| <div class="block">INTERNAL: |
| Setup the default classExtractionMethod, or if one was specified by the user make sure it is valid.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/eclipse/persistence/descriptors/ClassExtractor.html#initialize-org.eclipse.persistence.descriptors.ClassDescriptor-org.eclipse.persistence.sessions.Session-">initialize</a></code> in class <code><a href="../../../../org/eclipse/persistence/descriptors/ClassExtractor.html" title="class in org.eclipse.persistence.descriptors">ClassExtractor</a></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../org/eclipse/persistence/exceptions/DescriptorException.html" title="class in org.eclipse.persistence.exceptions">DescriptorException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="extractClassFromRow-org.eclipse.persistence.sessions.Record-org.eclipse.persistence.sessions.Session-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>extractClassFromRow</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> extractClassFromRow(<a href="../../../../org/eclipse/persistence/sessions/Record.html" title="interface in org.eclipse.persistence.sessions">Record</a> row, |
| <a href="../../../../org/eclipse/persistence/sessions/Session.html" title="interface in org.eclipse.persistence.sessions">Session</a> session)</pre> |
| <div class="block">INTERNAL |
| Extract/compute the class from the database row and return the class. |
| Map is used as the public interface to database row, the key is the field name, |
| the value is the database value.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/eclipse/persistence/descriptors/ClassExtractor.html#extractClassFromRow-org.eclipse.persistence.sessions.Record-org.eclipse.persistence.sessions.Session-">extractClassFromRow</a></code> in class <code><a href="../../../../org/eclipse/persistence/descriptors/ClassExtractor.html" title="class in org.eclipse.persistence.descriptors">ClassExtractor</a></code></dd> |
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| <a name="getDescriptor--"> |
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| <h4>getDescriptor</h4> |
| <pre>protected <a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a> getDescriptor()</pre> |
| <div class="block">INTERNAL: |
| Return the descriptor.</div> |
| </li> |
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| <a name="setDescriptor-org.eclipse.persistence.descriptors.ClassDescriptor-"> |
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| <h4>setDescriptor</h4> |
| <pre>protected void setDescriptor(<a href="../../../../org/eclipse/persistence/descriptors/ClassDescriptor.html" title="class in org.eclipse.persistence.descriptors">ClassDescriptor</a> descriptor)</pre> |
| <div class="block">INTERNAL: |
| Set the descriptor.</div> |
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