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| <H2> |
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| javax.persistence</FONT> |
| <BR> |
| Annotation Type OrderColumn</H2> |
| <HR> |
| <DL> |
| <DT><PRE><FONT SIZE="-1">@Target(value={METHOD,FIELD}) |
| @Retention(value=RUNTIME) |
| </FONT>public @interface <B>OrderColumn</B></DL> |
| </PRE> |
| |
| <P> |
| Specifies a column that is used to maintain the persistent order of |
| a list. The persistence provider is responsible for maintaining the |
| order upon retrieval and in the database and for updating the |
| ordering upon flushing to the database to reflect any insertion, |
| deletion, or reordering affecting the list. |
| |
| <p> The <code>OrderColumn</code> annotation is specified on a |
| OneToMany or ManyToMany relationship or on an element |
| collection. The <code>OrderColumn</code> annotation is specified on |
| the side of the relationship that references the collection that is |
| to be ordered. The order column is not visible as part of the state |
| of the entity or embeddable class. |
| |
| <p> The <A HREF="../../javax/persistence/OrderBy.html" title="annotation in javax.persistence"><CODE>OrderBy</CODE></A> annotation |
| should be used for ordering that is visible as persistent state and |
| maintained by the application. The <code>OrderBy</code> annotation is not used |
| when <code>OrderColumn</code> is specified. |
| |
| <pre> |
| |
| Example: |
| |
| @Entity |
| public class CreditCard { |
| |
| @Id long ccNumber; |
| |
| @OneToMany // unidirectional |
| @OrderColumn |
| List<CardTransaction> transactionHistory; |
| ... |
| } |
| |
| </pre> |
| <P> |
| |
| <P> |
| <DL> |
| <DT><B>See Also:</B><DD><A HREF="../../javax/persistence/OrderBy.html" title="annotation in javax.persistence"><CODE>OrderBy</CODE></A><DT><B>Since:</B></DT> |
| <DD>Java Persistence 2.0</DD> |
| </DL> |
| <HR> |
| |
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| <!-- =========== ANNOTATION TYPE OPTIONAL MEMBER SUMMARY =========== --> |
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| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
| <B>Optional Element Summary</B></FONT></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.lang.String</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../javax/persistence/OrderColumn.html#columnDefinition()">columnDefinition</A></B></CODE> |
| |
| <BR> |
| (Optional) The SQL fragment that is used when generating the DDL for the |
| column.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> boolean</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../javax/persistence/OrderColumn.html#insertable()">insertable</A></B></CODE> |
| |
| <BR> |
| (Optional) Whether the column is included in SQL INSERT statements |
| generated by the persistence provider.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.lang.String</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../javax/persistence/OrderColumn.html#name()">name</A></B></CODE> |
| |
| <BR> |
| (Optional) The name of the ordering column.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> boolean</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../javax/persistence/OrderColumn.html#nullable()">nullable</A></B></CODE> |
| |
| <BR> |
| (Optional) Whether the database column is nullable.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> boolean</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../javax/persistence/OrderColumn.html#updatable()">updatable</A></B></CODE> |
| |
| <BR> |
| (Optional) Whether the column is included in SQL UPDATE statements |
| generated by the persistence provider.</TD> |
| </TR> |
| </TABLE> |
| |
| <P> |
| <A NAME="name()"><!-- --></A><H3> |
| name</H3> |
| <PRE> |
| public abstract java.lang.String <B>name</B></PRE> |
| <DL> |
| <DD>(Optional) The name of the ordering column. |
| Defaults to the concatenation of the name of the |
| referencing property or field; "_"; "ORDER". |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| <DL> |
| <DT><B>Default:</B><DD>""</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="nullable()"><!-- --></A><H3> |
| nullable</H3> |
| <PRE> |
| public abstract boolean <B>nullable</B></PRE> |
| <DL> |
| <DD>(Optional) Whether the database column is nullable. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| <DL> |
| <DT><B>Default:</B><DD>true</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="insertable()"><!-- --></A><H3> |
| insertable</H3> |
| <PRE> |
| public abstract boolean <B>insertable</B></PRE> |
| <DL> |
| <DD>(Optional) Whether the column is included in SQL INSERT statements |
| generated by the persistence provider. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| <DL> |
| <DT><B>Default:</B><DD>true</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="updatable()"><!-- --></A><H3> |
| updatable</H3> |
| <PRE> |
| public abstract boolean <B>updatable</B></PRE> |
| <DL> |
| <DD>(Optional) Whether the column is included in SQL UPDATE statements |
| generated by the persistence provider. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| <DL> |
| <DT><B>Default:</B><DD>true</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="columnDefinition()"><!-- --></A><H3> |
| columnDefinition</H3> |
| <PRE> |
| public abstract java.lang.String <B>columnDefinition</B></PRE> |
| <DL> |
| <DD>(Optional) The SQL fragment that is used when generating the DDL for the |
| column. Defaults to generated SQL to create a column of the inferred type. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| <DL> |
| <DT><B>Default:</B><DD>""</DD> |
| </DL> |
| </DL> |
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