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<title>Basic mapping</title>
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<meta name="date" content="2012-09-19T13:27:57Z" />
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<meta name="doctitle" content="Basic mapping" />
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<p class="betadraftsubtitle">Beta Draft: 2012-09-19</p>
<p><a id="BABBABCE" name="BABBABCE"></a></p>
<div class="sect2"><!-- infolevel="all" infotype="General" -->
<h1>Basic mapping</h1>
<p><a id="sthref183" name="sthref183"></a><a id="sthref184" name="sthref184"></a><a id="sthref185" name="sthref185"></a><a id="sthref186" name="sthref186"></a>Use a <span class="bold">Basic Mapping</span> to map an attribute directly to a database column. Basic mappings may be used only with the following attribute types:</p>
<ul>
<li>
<p>Java primitive types and wrappers of the primitive types</p>
</li>
<li>
<p><code>java.lang.String, java.math.BigInteger</code></p>
</li>
<li>
<p><code>java.math.BigDecimal</code></p>
</li>
<li>
<p><code>java.util.Date</code></p>
</li>
<li>
<p><code>java.util.Calendar, java.sql.Date</code></p>
</li>
<li>
<p><code>java.sql.Time</code></p>
</li>
<li>
<p><code>java.sql.Timestamp</code></p>
</li>
<li>
<p><code>byte[]</code></p>
</li>
<li>
<p><code>Byte[]</code></p>
</li>
<li>
<p><code>char[]</code></p>
</li>
<li>
<p><code>Character[]</code></p>
</li>
<li>
<p>enums</p>
</li>
<li>
<p>any other type that implements <code>Serializable</code></p>
</li>
</ul>
<p>To create a basic mapping:</p>
<ol>
<li>
<p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, right-click the field to map. Select <span class="bold">Map As &gt; Basic</span>. The <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> displays the properties for the selected field.</p>
<div class="figure"><a id="sthref187" name="sthref187"></a>
<p class="titleinfigure">JPA Details, Basic mapping</p>
<img src="img/jpa_details_basic.png" alt="PA Details, Basic mapping" title="PA Details, Basic mapping" /><br /></div>
<!-- class="figure" --></li>
<li>
<p>Complete each field in the <a href="reference029.htm#CACCGGCG">Basic Mapping</a> area.</p>
</li>
<li>
<p>Complete the remaining areas in the <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a>.</p>
</li>
</ol>
<p>Eclipse adds the following annotations to the field:</p>
<pre xml:space="preserve" class="oac_no_warn">
@Column(name="<span class="italic">&lt;COLUMN_NAME&gt;</span>", table="<span class="italic">&lt;COLUMN_TABLE&gt;</span>", 
    insertable=<span class="italic">&lt;INSERTABLE&gt;</span>, updatable=<span class="italic">&lt;UPDATABLE&gt;</span>)
@Basic(fetch=FetchType.<span class="italic">&lt;FETCH_TYPE&gt;</span>, optional = <span class="italic">&lt;OPTIONAL&gt;</span>)
@Temporal(TemporalType.<span class="italic">&lt;TEMPORAL&gt;</span>)
</pre>
<a id="sthref188" name="sthref188"></a>
<p class="subhead2">Related tasks</p>
<ul>
<li>
<p><a href="task_mapping.htm#BABDGBIJ">Mapping an entity</a></p>
</li>
</ul>
<a id="sthref189" name="sthref189"></a>
<p class="subhead2">Related references</p>
<ul>
<li>
<p><a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a></p>
</li>
<li>
<p><a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a></p>
</li>
</ul>
<a id="sthref190" name="sthref190"></a>
<p class="subhead2">Related concepts</p>
<ul>
<li>
<p><a href="concept_mapping.htm#BABBDJFI">Understanding OR mappings</a></p>
</li>
<li>
<p><a href="concepts001.htm#BABBGFJG">Understanding Java Persistence API</a></p>
</li>
</ul>
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