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    <p>I found code for a class called "ObjectLatch" here: <a href="http://forums.sun.com/thread.jspa?threadID=5321141" rel="nofollow noreferrer">http://forums.sun.com/thread.jspa?threadID=5321141</a></p> <pre><code>package jfco.progs; import java.util.concurrent.CountDownLatch; /** * &lt;H1&gt;A Blocking Object Latch&lt;/H1&gt; This class implements a blocking object * latch, that acts as a synchronizer between a producer of an object and it's * consumer(s). * &lt;p&gt; * An object is set with &lt;code&gt;set()&lt;/code&gt;only ONCE. Further attempts to set * the object are just ignored.&lt;br&gt; * &lt;p&gt; * Consumers request the object with &lt;code&gt;get()&lt;/code&gt;. If the object is not * already set, consumers are blocked waiting until the object is available or &lt;br&gt; * until an interrupt (InteruptedException) terminates the wait. * &lt;p&gt; * The latch can be tested for object availability with isAvailable(), which * answers true if the object has already been set. &lt;br&gt; */ public class ObjectLatch&lt;R&gt; { /** The object. */ private R object = null; /** The latch counter created and set to 1. */ private final CountDownLatch latch = new CountDownLatch(1); /** * Checks if the object is already available (has been already set). * * @return true, if the object is already available (has been already set) */ public boolean isAvailable() { return latch.getCount() == 0; } /** * Sets the object if it is not already set. Otherwise ignore this request. * * @param object * the object */ public synchronized void set(R object) { if (!isAvailable()) { this.object = object; latch.countDown(); } } /** * Get the object if it is already available (has already been set). * &lt;p&gt; * If it is not available, wait until it is or until an interrupt * (InterruptedException) terminates the wait. * * @return the object if it is already available (has already been set) * * @throws InterruptedException */ public R get() throws InterruptedException { latch.await(); synchronized (this) { return object; } } } </code></pre>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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