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MarshalledTupleKeyEntity (Oracle - Berkeley DB Java API)
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com.sleepycat.bind.tuple</FONT>
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Interface MarshalledTupleKeyEntity</H2>
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<DL>
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<DT><PRE>public interface <B>MarshalledTupleKeyEntity</B></DL>
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</PRE>
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<P>
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A marshalling interface implemented by entity classes that represent keys as
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tuples. Since <code>MarshalledTupleKeyEntity</code> objects are instantiated
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using Java deserialization, no particular constructor is required by classes
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that implement this interface.
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<p>Note that a marshalled tuple key extractor is somewhat less efficient
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than a non-marshalled key tuple extractor because more conversions are
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needed. A marshalled key extractor must convert the entry to an object in
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order to extract the key fields, while an unmarshalled key extractor does
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not.</p>
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<P>
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<P>
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<DL>
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<DT><B>See Also:</B><DD><A HREF="../../../../com/sleepycat/bind/tuple/TupleTupleMarshalledBinding.html" title="class in com.sleepycat.bind.tuple"><CODE>TupleTupleMarshalledBinding</CODE></A>,
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<A HREF="../../../../com/sleepycat/bind/serial/TupleSerialMarshalledBinding.html" title="class in com.sleepycat.bind.serial"><CODE>TupleSerialMarshalledBinding</CODE></A></DL>
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<!-- ========== METHOD SUMMARY =========== -->
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/sleepycat/bind/tuple/MarshalledTupleKeyEntity.html#marshalPrimaryKey(com.sleepycat.bind.tuple.TupleOutput)">marshalPrimaryKey</A></B>(<A HREF="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</A> keyOutput)</CODE>
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<BR>
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Extracts the entity's primary key and writes it to the key output.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE> boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/sleepycat/bind/tuple/MarshalledTupleKeyEntity.html#marshalSecondaryKey(java.lang.String, com.sleepycat.bind.tuple.TupleOutput)">marshalSecondaryKey</A></B>(<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> keyName,
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<A HREF="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</A> keyOutput)</CODE>
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<BR>
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Extracts the entity's secondary key and writes it to the key output.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/sleepycat/bind/tuple/MarshalledTupleKeyEntity.html#nullifyForeignKey(java.lang.String)">nullifyForeignKey</A></B>(<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> keyName)</CODE>
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<BR>
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Clears the entity's secondary key fields for the given key name.</TD>
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/sleepycat/bind/tuple/MarshalledTupleKeyEntity.html#unmarshalPrimaryKey(com.sleepycat.bind.tuple.TupleInput)">unmarshalPrimaryKey</A></B>(<A HREF="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</A> keyInput)</CODE>
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<BR>
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Completes construction of the entity by setting its primary key from the
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stored primary key.</TD>
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<A NAME="marshalPrimaryKey(com.sleepycat.bind.tuple.TupleOutput)"><!-- --></A><H3>
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marshalPrimaryKey</H3>
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<PRE>
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void <B>marshalPrimaryKey</B>(<A HREF="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</A> keyOutput)</PRE>
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<DL>
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<DD>Extracts the entity's primary key and writes it to the key output.
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>keyOutput</CODE> - is the output tuple.</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="unmarshalPrimaryKey(com.sleepycat.bind.tuple.TupleInput)"><!-- --></A><H3>
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unmarshalPrimaryKey</H3>
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<PRE>
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void <B>unmarshalPrimaryKey</B>(<A HREF="../../../../com/sleepycat/bind/tuple/TupleInput.html" title="class in com.sleepycat.bind.tuple">TupleInput</A> keyInput)</PRE>
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<DL>
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<DD>Completes construction of the entity by setting its primary key from the
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stored primary key.
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>keyInput</CODE> - is the input tuple.</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="marshalSecondaryKey(java.lang.String, com.sleepycat.bind.tuple.TupleOutput)"><!-- --></A><H3>
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marshalSecondaryKey</H3>
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<PRE>
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boolean <B>marshalSecondaryKey</B>(<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> keyName,
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<A HREF="../../../../com/sleepycat/bind/tuple/TupleOutput.html" title="class in com.sleepycat.bind.tuple">TupleOutput</A> keyOutput)</PRE>
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<DL>
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<DD>Extracts the entity's secondary key and writes it to the key output.
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>keyName</CODE> - identifies the secondary key.<DD><CODE>keyOutput</CODE> - is the output tuple.
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<DT><B>Returns:</B><DD>true if a key was created, or false to indicate that the key is
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not present.</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="nullifyForeignKey(java.lang.String)"><!-- --></A><H3>
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nullifyForeignKey</H3>
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<PRE>
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boolean <B>nullifyForeignKey</B>(<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> keyName)</PRE>
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<DL>
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<DD>Clears the entity's secondary key fields for the given key name.
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<p>The specified index key should be changed by this method such that
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<A HREF="../../../../com/sleepycat/bind/tuple/MarshalledTupleKeyEntity.html#marshalSecondaryKey(java.lang.String, com.sleepycat.bind.tuple.TupleOutput)"><CODE>marshalSecondaryKey(java.lang.String, com.sleepycat.bind.tuple.TupleOutput)</CODE></A> for the same key name will return false.
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Other fields in the data object should remain unchanged.</p>
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<p>If <A HREF="../../../../com/sleepycat/db/ForeignKeyDeleteAction.html#NULLIFY"><CODE>ForeignKeyDeleteAction.NULLIFY</CODE></A> was
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specified when opening the secondary database, this method is called
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when the entity for this foreign key is deleted. If NULLIFY was not
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specified, this method will not be called and may always return
|
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false.</p>
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>keyName</CODE> - identifies the secondary key.
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<DT><B>Returns:</B><DD>true if the key was cleared, or false to indicate that the key
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is not present and no change is necessary.</DL>
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