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| <title>Basic mapping</title> |
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| <p class="betadraftsubtitle">Beta Draft: 2013-01-03</p> |
| <p><a id="BABBABCE" name="BABBABCE"></a></p> |
| <div class="sect2"><!-- infolevel="all" infotype="General" --> |
| <h1>Basic mapping</h1> |
| <p><a id="sthref201" name="sthref201"></a><a id="sthref202" name="sthref202"></a><a id="sthref203" name="sthref203"></a><a id="sthref204" name="sthref204"></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 > 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="sthref205" name="sthref205"></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="reference033.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"><COLUMN_NAME></span>", table="<span class="italic"><COLUMN_TABLE></span>", |
| insertable=<span class="italic"><INSERTABLE></span>, updatable=<span class="italic"><UPDATABLE></span>) |
| @Basic(fetch=FetchType.<span class="italic"><FETCH_TYPE></span>, optional = <span class="italic"><OPTIONAL></span>) |
| @Temporal(TemporalType.<span class="italic"><TEMPORAL></span>) |
| </pre> |
| <a id="sthref206" name="sthref206"></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="sthref207" name="sthref207"></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="sthref208" name="sthref208"></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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