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| <pre>public interface <span class="typeNameLabel">PersistenceUtil</span></pre> |
| <div class="block">Utility interface between the application and the persistence |
| provider(s). |
| |
| <p> The <code>PersistenceUtil</code> interface instance obtained from the |
| <a href="../../javax/persistence/Persistence.html" title="class in javax.persistence"><code>Persistence</code></a> class is used to determine the load state of an |
| entity or entity attribute regardless of which persistence |
| provider in the environment created the entity.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>Java Persistence 2.0</dd> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/PersistenceUtil.html#isLoaded-java.lang.Object-">isLoaded</a></span>(java.lang.Object entity)</code> |
| <div class="block">Determine the load state of an entity.</div> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/PersistenceUtil.html#isLoaded-java.lang.Object-java.lang.String-">isLoaded</a></span>(java.lang.Object entity, |
| java.lang.String attributeName)</code> |
| <div class="block">Determine the load state of a given persistent attribute.</div> |
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| <h4>isLoaded</h4> |
| <pre>boolean isLoaded(java.lang.Object entity, |
| java.lang.String attributeName)</pre> |
| <div class="block">Determine the load state of a given persistent attribute.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>entity</code> - entity containing the attribute</dd> |
| <dd><code>attributeName</code> - name of attribute whose load state is |
| to be determined</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>false if entity's state has not been loaded or |
| if the attribute state has not been loaded, else true</dd> |
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| <h4>isLoaded</h4> |
| <pre>boolean isLoaded(java.lang.Object entity)</pre> |
| <div class="block">Determine the load state of an entity. |
| This method can be used to determine the load state |
| of an entity passed as a reference. An entity is |
| considered loaded if all attributes for which |
| <code>FetchType.EAGER</code> has been specified have been loaded. |
| <p> The <code>isLoaded(Object, String)</code> method should be used to |
| determine the load state of an attribute. |
| Not doing so might lead to unintended loading of state.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>entity</code> - whose load state is to be determined</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>false if the entity has not been loaded, else true</dd> |
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