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| <pre>public interface <span class="typeNameLabel">Cache</span></pre> |
| <div class="block">Interface used to interact with the second-level cache. |
| If a cache is not in use, the methods of this interface have |
| no effect, except for <code>contains</code>, which returns false.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>Java Persistence 2.0</dd> |
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| <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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/Cache.html#contains-java.lang.Class-java.lang.Object-">contains</a></span>(java.lang.Class cls, |
| java.lang.Object primaryKey)</code> |
| <div class="block">Whether the cache contains data for the given entity.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/Cache.html#evict-java.lang.Class-">evict</a></span>(java.lang.Class cls)</code> |
| <div class="block">Remove the data for entities of the specified class (and its |
| subclasses) from the cache.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/Cache.html#evict-java.lang.Class-java.lang.Object-">evict</a></span>(java.lang.Class cls, |
| java.lang.Object primaryKey)</code> |
| <div class="block">Remove the data for the given entity from the cache.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/Cache.html#evictAll--">evictAll</a></span>()</code> |
| <div class="block">Clear the cache.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><T> T</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/Cache.html#unwrap-java.lang.Class-">unwrap</a></span>(java.lang.Class<T> cls)</code> |
| <div class="block">Return an object of the specified type to allow access to the |
| provider-specific API.</div> |
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| <h4>contains</h4> |
| <pre>boolean contains(java.lang.Class cls, |
| java.lang.Object primaryKey)</pre> |
| <div class="block">Whether the cache contains data for the given entity.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cls</code> - entity class</dd> |
| <dd><code>primaryKey</code> - primary key</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>boolean indicating whether the entity is in the cache</dd> |
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| <h4>evict</h4> |
| <pre>void evict(java.lang.Class cls, |
| java.lang.Object primaryKey)</pre> |
| <div class="block">Remove the data for the given entity from the cache.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cls</code> - entity class</dd> |
| <dd><code>primaryKey</code> - primary key</dd> |
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| <h4>evict</h4> |
| <pre>void evict(java.lang.Class cls)</pre> |
| <div class="block">Remove the data for entities of the specified class (and its |
| subclasses) from the cache.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cls</code> - entity class</dd> |
| </dl> |
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| <h4>evictAll</h4> |
| <pre>void evictAll()</pre> |
| <div class="block">Clear the cache.</div> |
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| <h4>unwrap</h4> |
| <pre><T> T unwrap(java.lang.Class<T> cls)</pre> |
| <div class="block">Return an object of the specified type to allow access to the |
| provider-specific API. If the provider's Cache |
| implementation does not support the specified class, the |
| PersistenceException is thrown.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cls</code> - the class of the object to be returned. This is |
| normally either the underlying Cache implementation |
| class or an interface that it implements.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an instance of the specified class</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../javax/persistence/PersistenceException.html" title="class in javax.persistence">PersistenceException</a></code> - if the provider does not |
| support the call</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>Java Persistence 2.1</dd> |
| </dl> |
| </li> |
| </ul> |
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