<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd"> <!--NewPage--> <HTML> <HEAD> <!-- Generated by javadoc on Wed Dec 03 16:22:07 EST 2003 --> <TITLE> SerialSerialKeyExtractor (Sleepycat Software, Inc. - Berkeley DB Java API) </TITLE> <META NAME="keywords" CONTENT="com.sleepycat.bdb.bind.serial.SerialSerialKeyExtractor,SerialSerialKeyExtractor class"> <LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../style.css" TITLE="Style"> </HEAD> <SCRIPT> function asd() { parent.document.title="SerialSerialKeyExtractor (Sleepycat Software, Inc. - Berkeley DB Java API)"; } </SCRIPT> <BODY BGCOLOR="white" onload="asd();"> <!-- ========== START OF NAVBAR ========== --> <A NAME="navbar_top"><!-- --></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"> <TR> <TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_top_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/SerialSerialKeyExtractor.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR> </TABLE> </TD> <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> <b>Berkeley DB</b><br><font size="-1"> version 4.2.52</font></EM> </TD> </TR> <TR> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialBinding.html"><B>PREV CLASS</B></A> <A HREF="../../../../../com/sleepycat/bdb/bind/serial/TupleSerialBinding.html"><B>NEXT CLASS</B></A></FONT></TD> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="SerialSerialKeyExtractor.html" TARGET="_top"><B>NO FRAMES</B></A> <SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="../../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> <TR> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> </TR> </TABLE> <!-- =========== END OF NAVBAR =========== --> <HR> <!-- ======== START OF CLASS DATA ======== --> <H2> <FONT SIZE="-1"> com.sleepycat.bdb.bind.serial</FONT> <BR> Class SerialSerialKeyExtractor</H2> <PRE> <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">java.lang.Object</A> | +--<B>com.sleepycat.bdb.bind.serial.SerialSerialKeyExtractor</B> </PRE> <DL> <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></DD> </DL> <HR> <DL> <DT>public abstract class <B>SerialSerialKeyExtractor</B><DT>extends <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A><DT>implements <A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></DL> <P> A abstract key extractor that uses a serial key and a serial value. This class takes care of serializing and deserializing the key and value data automatically. Its two abstract methods must be implemented by a concrete subclass to extract/clear the index key from the deserialized data objects. <ul> <li> <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#extractIndexKey(java.lang.Object, java.lang.Object)"><CODE>extractIndexKey(Object,Object)</CODE></A> </li> <li> <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#clearIndexKey(java.lang.Object)"><CODE>clearIndexKey(Object)</CODE></A> </li> </ul> <P> <P> <HR> <P> <!-- ======== NESTED CLASS SUMMARY ======== --> <!-- =========== FIELD SUMMARY =========== --> <!-- ======== CONSTRUCTOR SUMMARY ======== --> <A NAME="constructor_summary"><!-- --></A> <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TD COLSPAN=2><FONT SIZE="+2"> <B>Constructor Summary</B></FONT></TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#SerialSerialKeyExtractor(com.sleepycat.bdb.bind.serial.SerialFormat, com.sleepycat.bdb.bind.serial.SerialFormat, com.sleepycat.bdb.bind.serial.SerialFormat)">SerialSerialKeyExtractor</A></B>(<A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialFormat.html">SerialFormat</A> primaryKeyFormat, <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialFormat.html">SerialFormat</A> valueFormat, <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialFormat.html">SerialFormat</A> indexKeyFormat)</CODE> <BR> Creates a serial-serial entity binding.</TD> </TR> </TABLE> <!-- ========== METHOD SUMMARY =========== --> <A NAME="method_summary"><!-- --></A> <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TD COLSPAN=2><FONT SIZE="+2"> <B>Method Summary</B></FONT></TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#clearIndexKey(com.sleepycat.bdb.bind.DataBuffer)">clearIndexKey</A></B>(<A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> valueData)</CODE> <BR> Clears the index key in a value buffer.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>abstract <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#clearIndexKey(java.lang.Object)">clearIndexKey</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> valueData)</CODE> <BR> Clears the index key in a value data object.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)">extractIndexKey</A></B>(<A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> primaryKeyData, <A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> valueData, <A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> indexKeyData)</CODE> <BR> Extracts the index key data from primary key and value buffers.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>abstract <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#extractIndexKey(java.lang.Object, java.lang.Object)">extractIndexKey</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> primaryKeyData, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> valueData)</CODE> <BR> Extracts the index key data object from primary key and value data objects.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../../../com/sleepycat/bdb/bind/DataFormat.html">DataFormat</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#getIndexKeyFormat()">getIndexKeyFormat</A></B>()</CODE> <BR> Returns the format of the index key data.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../../../com/sleepycat/bdb/bind/DataFormat.html">DataFormat</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#getPrimaryKeyFormat()">getPrimaryKeyFormat</A></B>()</CODE> <BR> Returns the format of the primary key data or null if the index key data is not derived from the primary key data.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../../../com/sleepycat/bdb/bind/DataFormat.html">DataFormat</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialKeyExtractor.html#getValueFormat()">getValueFormat</A></B>()</CODE> <BR> Returns the format of the value data or null if the index key data is not derived from the value data.</TD> </TR> </TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"> <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> <TD><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A></B></TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#equals(java.lang.Object)">equals</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#getClass()">getClass</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#hashCode()">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#notify()">notify</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#toString()">toString</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait()">wait</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait(long)">wait</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait(long, int)">wait</A></CODE></TD> </TR> </TABLE> <P> <!-- ============ FIELD DETAIL =========== --> <!-- ========= CONSTRUCTOR DETAIL ======== --> <A NAME="constructor_detail"><!-- --></A> <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TD COLSPAN=1><FONT SIZE="+2"> <B>Constructor Detail</B></FONT></TD> </TR> </TABLE> <A NAME="SerialSerialKeyExtractor(com.sleepycat.bdb.bind.serial.SerialFormat, com.sleepycat.bdb.bind.serial.SerialFormat, com.sleepycat.bdb.bind.serial.SerialFormat)"><!-- --></A><H3> SerialSerialKeyExtractor</H3> <PRE> public <B>SerialSerialKeyExtractor</B>(<A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialFormat.html">SerialFormat</A> primaryKeyFormat, <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialFormat.html">SerialFormat</A> valueFormat, <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialFormat.html">SerialFormat</A> indexKeyFormat)</PRE> <DL> <DD>Creates a serial-serial entity binding. <P> <DT><B>Parameters:</B><DD><CODE>primaryKeyFormat</CODE> - is the primary key format, or null if no primary key data is used to construct the index key.<DD><CODE>valueFormat</CODE> - is the value format, or null if no value data is used to construct the index key.<DD><CODE>indexKeyFormat</CODE> - is the index key format.</DL> <!-- ============ METHOD DETAIL ========== --> <A NAME="method_detail"><!-- --></A> <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TD COLSPAN=1><FONT SIZE="+2"> <B>Method Detail</B></FONT></TD> </TR> </TABLE> <A NAME="getPrimaryKeyFormat()"><!-- --></A><H3> getPrimaryKeyFormat</H3> <PRE> public <A HREF="../../../../../com/sleepycat/bdb/bind/DataFormat.html">DataFormat</A> <B>getPrimaryKeyFormat</B>()</PRE> <DL> <DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></B></DD> <DD>Returns the format of the primary key data or null if the index key data is not derived from the primary key data. If this method returns null, then null will be passed for the <code>primaryKeyData</code> parameter of <A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)"><CODE>KeyExtractor.extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)</CODE></A>. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#getPrimaryKeyFormat()">getPrimaryKeyFormat</A></CODE> in interface <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the format of the primary key data or null.</DL> </DD> </DL> <HR> <A NAME="getValueFormat()"><!-- --></A><H3> getValueFormat</H3> <PRE> public <A HREF="../../../../../com/sleepycat/bdb/bind/DataFormat.html">DataFormat</A> <B>getValueFormat</B>()</PRE> <DL> <DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></B></DD> <DD>Returns the format of the value data or null if the index key data is not derived from the value data. If this method returns null, then null will be passed for the <code>valueData</code> parameter of <A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)"><CODE>KeyExtractor.extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)</CODE></A>. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#getValueFormat()">getValueFormat</A></CODE> in interface <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the format of the value data or null.</DL> </DD> </DL> <HR> <A NAME="getIndexKeyFormat()"><!-- --></A><H3> getIndexKeyFormat</H3> <PRE> public <A HREF="../../../../../com/sleepycat/bdb/bind/DataFormat.html">DataFormat</A> <B>getIndexKeyFormat</B>()</PRE> <DL> <DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></B></DD> <DD>Returns the format of the index key data. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#getIndexKeyFormat()">getIndexKeyFormat</A></CODE> in interface <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the format of the index key data.</DL> </DD> </DL> <HR> <A NAME="extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)"><!-- --></A><H3> extractIndexKey</H3> <PRE> public void <B>extractIndexKey</B>(<A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> primaryKeyData, <A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> valueData, <A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> indexKeyData) throws <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></PRE> <DL> <DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></B></DD> <DD>Extracts the index key data from primary key and value buffers. The index key is extracted when saving the data record identified by the primary key and value buffers, in order to add or remove an index entry in the database for that data record. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)">extractIndexKey</A></CODE> in interface <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>primaryKeyData</CODE> - is the source primary key data, or null if no primary key data is used to construct the index key, in which case <A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#getPrimaryKeyFormat()"><CODE>KeyExtractor.getPrimaryKeyFormat()</CODE></A> should also return null.<DD><CODE>valueData</CODE> - is the source value data, or null if no value data is used to construct the index key, in which case <A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#getValueFormat()"><CODE>KeyExtractor.getValueFormat()</CODE></A> should also return null.<DD><CODE>indexKeyData</CODE> - is the destination index key buffer. For index keys which are optionally present, the buffer's length should be set to zero to indicate that the key is not present or null. <DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></CODE></DL> </DD> </DL> <HR> <A NAME="clearIndexKey(com.sleepycat.bdb.bind.DataBuffer)"><!-- --></A><H3> clearIndexKey</H3> <PRE> public void <B>clearIndexKey</B>(<A HREF="../../../../../com/sleepycat/bdb/bind/DataBuffer.html">DataBuffer</A> valueData) throws <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></PRE> <DL> <DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></B></DD> <DD>Clears the index key in a value buffer. The index key is cleared when the index is for a foreign key identifying a record that has been deleted. This method is called only if the <A HREF="../../../../../com/sleepycat/bdb/ForeignKeyIndex.html"><CODE>ForeignKeyIndex</CODE></A> is configured with <A HREF="../../../../../com/sleepycat/bdb/ForeignKeyIndex.html#ON_DELETE_CLEAR"><CODE>ForeignKeyIndex.ON_DELETE_CLEAR</CODE></A>. It is never called for index keys that are derived from primary key data, since in this case <A HREF="../../../../../com/sleepycat/bdb/ForeignKeyIndex.html#ON_DELETE_CLEAR"><CODE>ForeignKeyIndex.ON_DELETE_CLEAR</CODE></A> is not allowed. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#clearIndexKey(com.sleepycat.bdb.bind.DataBuffer)">clearIndexKey</A></CODE> in interface <CODE><A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html">KeyExtractor</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>valueData</CODE> - is the source and destination value data. On entry this contains the index key to be cleared. It should be changed by this method such that <A HREF="../../../../../com/sleepycat/bdb/bind/KeyExtractor.html#extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)"><CODE>KeyExtractor.extractIndexKey(com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer, com.sleepycat.bdb.bind.DataBuffer)</CODE></A> will extract a null key (set the buffer length to zero). Other data in the buffer should remain unchanged. <DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></CODE></DL> </DD> </DL> <HR> <A NAME="extractIndexKey(java.lang.Object, java.lang.Object)"><!-- --></A><H3> extractIndexKey</H3> <PRE> public abstract <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> <B>extractIndexKey</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> primaryKeyData, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> valueData) throws <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></PRE> <DL> <DD>Extracts the index key data object from primary key and value data objects. <P> <DD><DL> </DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>primaryKeyData</CODE> - is the deserialized source primary key data, or null if no primary key data is used to construct the index key.<DD><CODE>valueData</CODE> - is the deserialized source value data, or null if no value data is used to construct the index key. <DT><B>Returns:</B><DD>the destination index key data object, or null to indicate that the key is not present. <DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></CODE></DL> </DD> </DL> <HR> <A NAME="clearIndexKey(java.lang.Object)"><!-- --></A><H3> clearIndexKey</H3> <PRE> public abstract <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> <B>clearIndexKey</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> valueData) throws <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></PRE> <DL> <DD>Clears the index key in a value data object. <P> <DD><DL> </DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>valueData</CODE> - is the source and destination value data object. <DT><B>Returns:</B><DD>the destination value data object, or null to indicate that the key is not present and no change is necessary. The value returned may be the same object passed as the valueData parameter or a newly created object. <DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/io/IOException.html">IOException</A></CODE></DL> </DD> </DL> <!-- ========= END OF CLASS DATA ========= --> <HR> <!-- ========== START OF NAVBAR ========== --> <A NAME="navbar_bottom"><!-- --></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"> <TR> <TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_bottom_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/SerialSerialKeyExtractor.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR> </TABLE> </TD> <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> <b>Berkeley DB</b><br><font size="-1"> version 4.2.52</font></EM> </TD> </TR> <TR> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../com/sleepycat/bdb/bind/serial/SerialSerialBinding.html"><B>PREV CLASS</B></A> <A HREF="../../../../../com/sleepycat/bdb/bind/serial/TupleSerialBinding.html"><B>NEXT CLASS</B></A></FONT></TD> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="SerialSerialKeyExtractor.html" TARGET="_top"><B>NO FRAMES</B></A> <SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="../../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> <TR> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> </TR> </TABLE> <!-- =========== END OF NAVBAR =========== --> <HR> <font size=1><a href="../../../../../../sleepycat/legal.html">Copyright (c) 1996-2003</a> <a href="http://www.sleepycat.com">Sleepycat Software, Inc.</a> - All rights reserved.</font> </BODY> </HTML>