http://wiki.apidesign.org/index.php?action=history&feed=atom&title=Factory 2026-04-11T01:23:56Z Revision history for this page on the wiki MediaWiki 1.12.0rc1 http://wiki.apidesign.org/index.php?title=Factory&diff=1667&oldid=prev 2008-11-15T12:36:28Z

<p><a href="/wiki/APIDesignPatterns:Factory" class="mw-redirect" title="APIDesignPatterns:Factory">APIDesignPatterns:Factory</a> moved to <a href="/wiki/Factory" title="Factory">Factory</a></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 12:36, 15 November 2008</td> </tr> </table>

JaroslavTulach http://wiki.apidesign.org/index.php?title=Factory&diff=1650&oldid=prev 2008-11-15T12:26:24Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 12:26, 15 November 2008</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 10:</td> <td colspan="2" class="diff-lineno">Line 10:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>All these details can be implemented and are hidden to some extent from the user of the [[API]]. It is impossible to achieve this with plain constructor.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>All these details can be implemented and are hidden to some extent from the user of the [[API]]. It is impossible to achieve this with plain constructor.</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[Category:<del style="color: red; font-weight: bold; text-decoration: none;">APIDesignPatters</del>]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[[Category:<ins style="color: red; font-weight: bold; text-decoration: none;">APIDesignPatterns</ins>]]</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[Category:<del style="color: red; font-weight: bold; text-decoration: none;">APIDesignPatters</del>:Creational]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[[Category:<ins style="color: red; font-weight: bold; text-decoration: none;">APIDesignPatterns</ins>:Creational]]</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[Category:<del style="color: red; font-weight: bold; text-decoration: none;">APIDesignPatters</del>:Encapsulation]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[[Category:<ins style="color: red; font-weight: bold; text-decoration: none;">APIDesignPatterns</ins>:Encapsulation]]</div></td></tr> </table>

JaroslavTulach http://wiki.apidesign.org/index.php?title=Factory&diff=1649&oldid=prev 2008-11-15T12:25:42Z

<p>New page: Factory method is well know design pattern useful in <a href="/wiki/API" class="mw-redirect" title="API">API</a> design too. In general, instead of making constructor of some class public, you can reveal a public static method that returns ...</p> <p><b>New page</b></p><div>Factory method is well know design pattern useful in [[API]] design too. In general, instead of making constructor of some class public, you can reveal a public static method that returns instance of the class:<br /> <br /> &lt;source lang=&quot;java&quot; snippet=&quot;aserverinfo.regularcreate&quot;/&gt;<br /> <br /> This has few benefits from the point of [[API]] [[evolution]]:<br /> * the class is not subclassable, which solves a lot of nasty evolution problems by itself<br /> * one can create a cache or have pool of instances to return<br /> * the whole factory method can be synchronized, preventing parallel access<br /> * one can return subclass of the return type, not the type itself<br /> All these details can be implemented and are hidden to some extent from the user of the [[API]]. It is impossible to achieve this with plain constructor.<br /> <br /> [[Category:APIDesignPatters]]<br /> [[Category:APIDesignPatters:Creational]]<br /> [[Category:APIDesignPatters:Encapsulation]]</div>

JaroslavTulach