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| Discriminator (JDO API 3.0) |
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| javax.jdo.annotations</FONT> |
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| Annotation Type Discriminator</H2> |
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| <DL> |
| <DT><PRE><FONT SIZE="-1">@Target(value=TYPE) |
| @Retention(value=RUNTIME) |
| </FONT>public @interface <B>Discriminator</B></DL> |
| </PRE> |
| |
| <P> |
| Annotation for the discriminator of the class. |
| Corresponds to the xml element "discriminator" of the "inheritance" element. |
| <P> |
| |
| <P> |
| <DL> |
| <DT><B>Since:</B></DT> |
| <DD>2.1</DD> |
| <DT><B>Version:</B></DT> |
| <DD>2.1</DD> |
| </DL> |
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| <B>Optional Element Summary</B></FONT></TH> |
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| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.lang.String</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../javax/jdo/annotations/Discriminator.html#column()">column</A></B></CODE> |
| |
| <BR> |
| Name of the column for the discriminator</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> <A HREF="../../../javax/jdo/annotations/Column.html" title="annotation in javax.jdo.annotations">Column</A>[]</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../javax/jdo/annotations/Discriminator.html#columns()">columns</A></B></CODE> |
| |
| <BR> |
| The column(s) making up the discriminator.</TD> |
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| <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/jdo/annotations/Discriminator.html#customStrategy()">customStrategy</A></B></CODE> |
| |
| <BR> |
| Custom strategy to use for the discriminator.</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/jdo/annotations/Discriminator.html#indexed()">indexed</A></B></CODE> |
| |
| <BR> |
| Whether the discriminator is indexed.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> <A HREF="../../../javax/jdo/annotations/DiscriminatorStrategy.html" title="enum in javax.jdo.annotations">DiscriminatorStrategy</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../javax/jdo/annotations/Discriminator.html#strategy()">strategy</A></B></CODE> |
| |
| <BR> |
| Strategy to use for the discriminator.</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/jdo/annotations/Discriminator.html#value()">value</A></B></CODE> |
| |
| <BR> |
| The value for the discriminator for objects of this class |
| when using "value-map" strategy.</TD> |
| </TR> |
| </TABLE> |
| |
| <P> |
| <A NAME="strategy()"><!-- --></A><H3> |
| strategy</H3> |
| <PRE> |
| public abstract <A HREF="../../../javax/jdo/annotations/DiscriminatorStrategy.html" title="enum in javax.jdo.annotations">DiscriminatorStrategy</A> <B>strategy</B></PRE> |
| <DL> |
| <DD>Strategy to use for the discriminator. The discriminator determines |
| the class associated with a row in the datastore. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>the strategy to use for the discriminator</DL> |
| <DL> |
| <DT><B>Default:</B><DD>javax.jdo.annotations.DiscriminatorStrategy.UNSPECIFIED</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="customStrategy()"><!-- --></A><H3> |
| customStrategy</H3> |
| <PRE> |
| public abstract java.lang.String <B>customStrategy</B></PRE> |
| <DL> |
| <DD>Custom strategy to use for the discriminator. |
| If customStrategy is non-empty, then strategy must be UNSPECIFIED. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>the custom strategy</DL> |
| <DL> |
| <DT><B>Default:</B><DD>""</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="indexed()"><!-- --></A><H3> |
| indexed</H3> |
| <PRE> |
| public abstract java.lang.String <B>indexed</B></PRE> |
| <DL> |
| <DD>Whether the discriminator is indexed. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>whether the discriminator is indexed</DL> |
| <DL> |
| <DT><B>Default:</B><DD>""</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="column()"><!-- --></A><H3> |
| column</H3> |
| <PRE> |
| public abstract java.lang.String <B>column</B></PRE> |
| <DL> |
| <DD>Name of the column for the discriminator |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>the name of the column for the discriminator</DL> |
| <DL> |
| <DT><B>Default:</B><DD>""</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="value()"><!-- --></A><H3> |
| value</H3> |
| <PRE> |
| public abstract java.lang.String <B>value</B></PRE> |
| <DL> |
| <DD>The value for the discriminator for objects of this class |
| when using "value-map" strategy. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>The value for the discriminator for objects of this class |
| when using "value-map" strategy</DL> |
| <DL> |
| <DT><B>Default:</B><DD>""</DD> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="columns()"><!-- --></A><H3> |
| columns</H3> |
| <PRE> |
| public abstract <A HREF="../../../javax/jdo/annotations/Column.html" title="annotation in javax.jdo.annotations">Column</A>[] <B>columns</B></PRE> |
| <DL> |
| <DD>The column(s) making up the discriminator. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>the column(s) making up the discriminator</DL> |
| <DL> |
| <DT><B>Default:</B><DD>{}</DD> |
| </DL> |
| </DL> |
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