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| author | Reinier Zwitserloot <reinier@zwitserloot.com> | 2017-05-08 21:28:02 +0200 |
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| committer | Reinier Zwitserloot <reinier@zwitserloot.com> | 2017-05-29 21:02:54 +0200 |
| commit | 8b7a7cbc813653a3248d6cf3a7779e220957bc85 (patch) | |
| tree | b9acfb9d68c6866acc3cfb9ee59d72ff43f1ebc3 /website/features/Cleanup.html | |
| parent | 72fd50b9f1db1ab6bfc1753ba6a1e686a2f0f22c (diff) | |
| download | lombok-8b7a7cbc813653a3248d6cf3a7779e220957bc85.tar.gz lombok-8b7a7cbc813653a3248d6cf3a7779e220957bc85.tar.bz2 lombok-8b7a7cbc813653a3248d6cf3a7779e220957bc85.zip | |
The great rename: the old ‘website’ is now ‘website-old’, and ‘website2’ is now ‘website’.
Diffstat (limited to 'website/features/Cleanup.html')
| -rw-r--r-- | website/features/Cleanup.html | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/website/features/Cleanup.html b/website/features/Cleanup.html deleted file mode 100644 index 37e53c18..00000000 --- a/website/features/Cleanup.html +++ /dev/null @@ -1,86 +0,0 @@ -<!DOCTYPE html> -<html><head> - <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> - <link rel="stylesheet" type="text/css" href="../logi/reset.css" /> - <link rel="stylesheet" type="text/css" href="features.css" /> - <link rel="shortcut icon" href="../favicon.ico" type="image/x-icon" /> - <meta name="description" content="Spice up your java" /> - <title>@Cleanup</title> -</head><body><div id="pepper"> - <div class="minimumHeight"></div> - <div class="meat"> - <div class="header"><a href="../index.html">Project Lombok</a></div> - <h1>@Cleanup</h1> - <div class="byline">Automatic resource management: Call your <code>close()</code> methods safely with no hassle.</div> - <div class="overview"> - <h3>Overview</h3> - <p> - You can use <code>@Cleanup</code> to ensure a given resource is automatically cleaned up before the code execution path exits your - current scope. You do this by annotating any local variable declaration with the <code>@Cleanup</code> annotation like so:<br /> - <code>@Cleanup InputStream in = new FileInputStream("some/file");</code><br /> - As a result, at the end of the scope you're in, <code>in.close()</code> is called. This call is guaranteed to run by way of a - try/finally construct. Look at the example below to see how this works. - </p><p> - If the type of object you'd like to cleanup does not have a <code>close()</code> method, but some other no-argument method, you can - specify the name of this method like so:<br /> - <code>@Cleanup("dispose") org.eclipse.swt.widgets.CoolBar bar = new CoolBar(parent, 0);</code><br /> - By default, the cleanup method is presumed to be <code>close()</code>. A cleanup method that takes 1 or more arguments cannot be called via - <code>@Cleanup</code>. - </p> - </div> - <div class="snippets"> - <div class="pre"> - <h3>With Lombok</h3> - <div class="snippet">@HTML_PRE@</div> - </div> - <div class="sep"></div> - <div class="post"> - <h3>Vanilla Java</h3> - <div class="snippet">@HTML_POST@</div> - </div> - </div> - <div style="clear: left;"></div> - <div class="overview confKeys"> - <h3>Supported configuration keys:</h3> - <dl> - <dt><code>lombok.cleanup.flagUsage</code> = [<code>warning</code> | <code>error</code>] (default: not set)</dt> - <dd>Lombok will flag any usage of <code>@Cleanup</code> as a warning or error if configured.</dd> - </dl> - </div> - <div class="overview"> - <h3>Small print</h3><div class="smallprint"> - <p> - In the finally block, the cleanup method is only called if the given resource is not <code>null</code>. However, if you use <code>delombok</code> - on the code, a call to <code>lombok.Lombok.preventNullAnalysis(Object o)</code> is inserted to prevent warnings if static code analysis could - determine that a null-check would not be needed. Compilation with <code>lombok.jar</code> on the classpath removes that method call, - so there is no runtime dependency. - </p> - <p> - If your code throws an exception, and the cleanup method call that is then triggered also throws an exception, then the original exception - is hidden by the exception thrown by the cleanup call. You should <em>not</em> rely on this 'feature'. Preferably, lombok would like to generate - code so that, if the main body has thrown an exception, any exception thrown by the close call is silently swallowed (but if the main body - exited in any other way, exceptions by the close call will not be swallowed). The authors of lombok do not currently know of a feasible way - to implement this scheme, but if java updates allow it, or we find a way, we'll fix it. - </p><p> - You do still need to handle any exception that the cleanup method can generate! - </p> - </div> - </div> - <div class="footer"> - <a href="index.html">Back to features</a> | <a href="NonNull.html">Previous feature (@NonNull)</a> | <a href="GetterSetter.html">Next feature (@Getter / @Setter)</a><br /> - <a href="../credits.html" class="creditsLink">credits</a> | <span class="copyright">Copyright © 2009-2016 The Project Lombok Authors, licensed under the <a href="http://www.opensource.org/licenses/mit-license.php">MIT license</a>.</span> - </div> - <div style="clear: both;"></div> - </div> -</div> -<script type="text/javascript"> - var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); - document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); -</script> -<script type="text/javascript"> - try { - var pageTracker = _gat._getTracker("UA-9884254-1"); - pageTracker._trackPageview(); - } catch(err) {} -</script> -</body></html> |