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BindVariableExpression (OpenJPA Parent POM 2.1.0 API)
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org.apache.openjpa.jdbc.kernel.exps</FONT>
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Class BindVariableExpression</H2>
<PRE>
<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html" title="class in org.apache.openjpa.jdbc.kernel.exps">org.apache.openjpa.jdbc.kernel.exps.EmptyExpression</A>
<IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.openjpa.jdbc.kernel.exps.BindVariableExpression</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/j2se/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</A>, <A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html" title="interface in org.apache.openjpa.jdbc.kernel.exps">Exp</A>, <A HREF="../../../../../../org/apache/openjpa/kernel/exps/Expression.html" title="interface in org.apache.openjpa.kernel.exps">Expression</A></DD>
</DL>
<HR>
<DL>
<DT><PRE> class <B>BindVariableExpression</B><DT>extends <A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html" title="class in org.apache.openjpa.jdbc.kernel.exps">EmptyExpression</A></DL>
</PRE>
<P>
Binds a variable to a value. Typically, the <A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/BindVariableExpression.html#initialize(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, java.util.Map)"><CODE>initialize(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, java.util.Map)</CODE></A> and
<CODE>#getJoins</CODE> methods of this expression are not called. They are
only called if the variable being bound is otherwise unused in the filter,
in which case we must at least make the joins to the variable because the
act of binding a variable should at least guarantee that an instance
represting the variable could exist (i.e. the binding collection is not
empty).
<P>
<P>
<DL>
<DT><B>Author:</B></DT>
<DD>Abe White</DD>
</DL>
<HR>
<P>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<A NAME="constructor_summary"><!-- --></A>
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<TD><CODE><B><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/BindVariableExpression.html#BindVariableExpression(org.apache.openjpa.jdbc.kernel.exps.Variable, org.apache.openjpa.jdbc.kernel.exps.PCPath, boolean)">BindVariableExpression</A></B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Variable.html" title="class in org.apache.openjpa.jdbc.kernel.exps">Variable</A>&nbsp;var,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/PCPath.html" title="class in org.apache.openjpa.jdbc.kernel.exps">PCPath</A>&nbsp;val,
boolean&nbsp;key)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructor.</TD>
</TR>
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<!-- ========== METHOD SUMMARY =========== -->
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/BindVariableExpression.html#acceptVisit(org.apache.openjpa.kernel.exps.ExpressionVisitor)">acceptVisit</A></B>(<A HREF="../../../../../../org/apache/openjpa/kernel/exps/ExpressionVisitor.html" title="interface in org.apache.openjpa.kernel.exps">ExpressionVisitor</A>&nbsp;visitor)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accept a visit from a tree visitor.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/BindVariableExpression.html#appendTo(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, org.apache.openjpa.jdbc.sql.SQLBuffer)">appendTo</A></B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/Select.html" title="interface in org.apache.openjpa.jdbc.sql">Select</A>&nbsp;sel,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpContext.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpContext</A>&nbsp;ctx,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpState.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpState</A>&nbsp;state,
<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/SQLBuffer.html" title="class in org.apache.openjpa.jdbc.sql">SQLBuffer</A>&nbsp;buf)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Append the SQL for this expression to the given buffer.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Variable.html" title="class in org.apache.openjpa.jdbc.kernel.exps">Variable</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/BindVariableExpression.html#getVariable()">getVariable</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpState.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpState</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/BindVariableExpression.html#initialize(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, java.util.Map)">initialize</A></B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/Select.html" title="interface in org.apache.openjpa.jdbc.sql">Select</A>&nbsp;sel,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpContext.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpContext</A>&nbsp;ctx,
<A HREF="http://java.sun.com/j2se/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&nbsp;contains)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Initialize the expression.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/BindVariableExpression.html#selectColumns(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, boolean)">selectColumns</A></B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/Select.html" title="interface in org.apache.openjpa.jdbc.sql">Select</A>&nbsp;sel,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpContext.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpContext</A>&nbsp;ctx,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpState.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpState</A>&nbsp;state,
boolean&nbsp;pks)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Select just the columns for this expression.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="BindVariableExpression(org.apache.openjpa.jdbc.kernel.exps.Variable, org.apache.openjpa.jdbc.kernel.exps.PCPath, boolean)"><!-- --></A><H3>
BindVariableExpression</H3>
<PRE>
public <B>BindVariableExpression</B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Variable.html" title="class in org.apache.openjpa.jdbc.kernel.exps">Variable</A>&nbsp;var,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/PCPath.html" title="class in org.apache.openjpa.jdbc.kernel.exps">PCPath</A>&nbsp;val,
boolean&nbsp;key)</PRE>
<DL>
<DD>Constructor. Supply values.
<P>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="getVariable()"><!-- --></A><H3>
getVariable</H3>
<PRE>
public <A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Variable.html" title="class in org.apache.openjpa.jdbc.kernel.exps">Variable</A> <B>getVariable</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="initialize(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, java.util.Map)"><!-- --></A><H3>
initialize</H3>
<PRE>
public <A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpState.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpState</A> <B>initialize</B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/Select.html" title="interface in org.apache.openjpa.jdbc.sql">Select</A>&nbsp;sel,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpContext.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpContext</A>&nbsp;ctx,
<A HREF="http://java.sun.com/j2se/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&nbsp;contains)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html#initialize(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, java.util.Map)">Exp</A></CODE></B></DD>
<DD>Initialize the expression. This method should recursively
initialize any sub-expressions or values.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html#initialize(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, java.util.Map)">initialize</A></CODE> in interface <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html" title="interface in org.apache.openjpa.jdbc.kernel.exps">Exp</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html#initialize(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, java.util.Map)">initialize</A></CODE> in class <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html" title="class in org.apache.openjpa.jdbc.kernel.exps">EmptyExpression</A></CODE></DL>
</DD>
<DD><DL>
<DD><CODE>contains</CODE> - map of relation paths to the number of times
the paths appear in a contains() expression;
used to ensure paths used for contains() within
the same AND expression used different aliases</DL>
</DD>
</DL>
<HR>
<A NAME="appendTo(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, org.apache.openjpa.jdbc.sql.SQLBuffer)"><!-- --></A><H3>
appendTo</H3>
<PRE>
public void <B>appendTo</B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/Select.html" title="interface in org.apache.openjpa.jdbc.sql">Select</A>&nbsp;sel,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpContext.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpContext</A>&nbsp;ctx,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpState.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpState</A>&nbsp;state,
<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/SQLBuffer.html" title="class in org.apache.openjpa.jdbc.sql">SQLBuffer</A>&nbsp;buf)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html#appendTo(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, org.apache.openjpa.jdbc.sql.SQLBuffer)">Exp</A></CODE></B></DD>
<DD>Append the SQL for this expression to the given buffer. The SQL
should optionally include any joins this expression needs.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html#appendTo(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, org.apache.openjpa.jdbc.sql.SQLBuffer)">appendTo</A></CODE> in interface <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html" title="interface in org.apache.openjpa.jdbc.kernel.exps">Exp</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html#appendTo(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, org.apache.openjpa.jdbc.sql.SQLBuffer)">appendTo</A></CODE> in class <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html" title="class in org.apache.openjpa.jdbc.kernel.exps">EmptyExpression</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="selectColumns(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, boolean)"><!-- --></A><H3>
selectColumns</H3>
<PRE>
public void <B>selectColumns</B>(<A HREF="../../../../../../org/apache/openjpa/jdbc/sql/Select.html" title="interface in org.apache.openjpa.jdbc.sql">Select</A>&nbsp;sel,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpContext.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpContext</A>&nbsp;ctx,
<A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/ExpState.html" title="class in org.apache.openjpa.jdbc.kernel.exps">ExpState</A>&nbsp;state,
boolean&nbsp;pks)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html#selectColumns(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, boolean)">Exp</A></CODE></B></DD>
<DD>Select just the columns for this expression.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html#selectColumns(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, boolean)">selectColumns</A></CODE> in interface <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/Exp.html" title="interface in org.apache.openjpa.jdbc.kernel.exps">Exp</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html#selectColumns(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.kernel.exps.ExpContext, org.apache.openjpa.jdbc.kernel.exps.ExpState, boolean)">selectColumns</A></CODE> in class <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html" title="class in org.apache.openjpa.jdbc.kernel.exps">EmptyExpression</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="acceptVisit(org.apache.openjpa.kernel.exps.ExpressionVisitor)"><!-- --></A><H3>
acceptVisit</H3>
<PRE>
public void <B>acceptVisit</B>(<A HREF="../../../../../../org/apache/openjpa/kernel/exps/ExpressionVisitor.html" title="interface in org.apache.openjpa.kernel.exps">ExpressionVisitor</A>&nbsp;visitor)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../../org/apache/openjpa/kernel/exps/Expression.html#acceptVisit(org.apache.openjpa.kernel.exps.ExpressionVisitor)">Expression</A></CODE></B></DD>
<DD>Accept a visit from a tree visitor.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/kernel/exps/Expression.html#acceptVisit(org.apache.openjpa.kernel.exps.ExpressionVisitor)">acceptVisit</A></CODE> in interface <CODE><A HREF="../../../../../../org/apache/openjpa/kernel/exps/Expression.html" title="interface in org.apache.openjpa.kernel.exps">Expression</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html#acceptVisit(org.apache.openjpa.kernel.exps.ExpressionVisitor)">acceptVisit</A></CODE> in class <CODE><A HREF="../../../../../../org/apache/openjpa/jdbc/kernel/exps/EmptyExpression.html" title="class in org.apache.openjpa.jdbc.kernel.exps">EmptyExpression</A></CODE></DL>
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