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    <p>From <a href="http://fisheye3.atlassian.com/browse/nhibernate/trunk/nhibernate/src/NHibernate/Tuple/ITuplizer.cs?r=3313" rel="noreferrer">ITuplizer's source code</a>:</p> <blockquote> <p>A tuplizer defines the contract for things which know how to manage a particular representation of a piece of data, given that representation's EntityMode (the entity-mode essentially defining which representation).</p> <p>If that given piece of data is thought of as a data structure, then a tuplizer is the thing which knows how to:</p> <ul> <li>create such a data structure appropriately </li> <li>extract values from and inject values into such a data structure</li> </ul> <p>For example, a given piece of data might be represented as a POCO class. Here, it's representation and entity-mode is POCO. Well a tuplizer for POCO entity-modes would know how to:</p> <ul> <li>create the data structure by calling the POCO's constructor </li> <li>extract and inject values through getters/setter, or by direct field access, etc </li> </ul> <p>That same piece of data might also be represented as a DOM structure, using the tuplizer associated with the XML entity-mode, which would generate instances of XmlElement as the data structure and know how to access the values as either nested XmlElements or as XmlAttributes.</p> </blockquote> <p>In the <a href="http://nhforge.org/blogs/nhibernate/archive/2008/10/16/less-than-gof-is-hbm.aspx" rel="noreferrer">words of Fabio Maulo</a>: </p> <blockquote> <p>The tuplizer defines how to transform a Property-Value to its persistent representation, and viceversa a Column-Value to its in-memory representation, and the EntityMode defines which tuplizer is in use.</p> </blockquote> <p>Some things you can do with custom tuplizers:</p> <ul> <li><a href="http://www.theserverside.com/news/1363571/Remote-Lazy-Loading-in-Hibernate" rel="noreferrer">Remote lazy loading</a> (the article uses Java Hibernate but the general concepts apply to NHibernate as well)</li> <li><a href="http://nhforge.org/blogs/nhibernate/archive/2008/10/12/less-than-few-is-gof.aspx" rel="noreferrer">Seamlessly mapping/persisting interfaces instead of POCOs</a></li> <li><a href="http://bitbucket.org/robertpi/functionalnhibernate/src/tip/src/app/FunctionalNHibernate/FSharpRecordTuplizer.fs" rel="noreferrer">Mapping/persisting F# records</a> (from the <a href="http://strangelights.com/blog/archive/2009/12/20/1650.aspx" rel="noreferrer">FunctionalNHibernate project</a>)</li> </ul>
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    1. POWhat is Tuplizer in NHibernate
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    1. USMauricio Scheffer
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    1. COAm I the only one who thinks the above verbiage might be actually understood only AFTER one already knows what a tuplizer is?
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    2. CO@rapt it is kinda hard to grok, but check out the examples.
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