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PathExpression (OpenJPA Parent POM 2.3.0 API) | |
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<FONT SIZE="-1"> | |
org.apache.openjpa.persistence.query</FONT> | |
<BR> | |
Interface PathExpression</H2> | |
<DL> | |
<DT><B>All Superinterfaces:</B> <DD><A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/OrderByItem.html" title="interface in org.apache.openjpa.persistence.query">OrderByItem</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html" title="interface in org.apache.openjpa.persistence.query">PredicateOperand</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/SelectItem.html" title="interface in org.apache.openjpa.persistence.query">SelectItem</A></DD> | |
</DL> | |
<DL> | |
<DT><B>All Known Subinterfaces:</B> <DD><A HREF="../../../../../org/apache/openjpa/persistence/query/DomainObject.html" title="interface in org.apache.openjpa.persistence.query">DomainObject</A></DD> | |
</DL> | |
<DL> | |
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../../org/apache/openjpa/persistence/query/AbstractDomainObject.html" title="class in org.apache.openjpa.persistence.query">AbstractDomainObject</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/EntryExpression.html" title="class in org.apache.openjpa.persistence.query">EntryExpression</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/FetchPath.html" title="class in org.apache.openjpa.persistence.query">FetchPath</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/JoinPath.html" title="class in org.apache.openjpa.persistence.query">JoinPath</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/KeyExpression.html" title="class in org.apache.openjpa.persistence.query">KeyExpression</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/OperatorPath.html" title="class in org.apache.openjpa.persistence.query">OperatorPath</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/RootPath.html" title="class in org.apache.openjpa.persistence.query">RootPath</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/ValueExpression.html" title="class in org.apache.openjpa.persistence.query">ValueExpression</A></DD> | |
</DL> | |
<HR> | |
<DL> | |
<DT><PRE>public interface <B>PathExpression</B><DT>extends <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</A></DL> | |
</PRE> | |
<P> | |
Interface for operations over objects reached via paths | |
<P> | |
<P> | |
<HR> | |
<P> | |
<!-- ========== METHOD SUMMARY =========== --> | |
<A NAME="method_summary"><!-- --></A> | |
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> | |
<B>Method Summary</B></FONT></TH> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#avg()">avg</A></B>()</CODE> | |
<BR> | |
Specify that the avg operation is to be applied.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#count()">count</A></B>()</CODE> | |
<BR> | |
Specify that the count operation is to be applied.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html" title="interface in org.apache.openjpa.persistence.query">PathExpression</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#get(java.lang.String)">get</A></B>(<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> attributeName)</CODE> | |
<BR> | |
Return a path expression corresponding to the referenced attribute.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Predicate.html" title="interface in org.apache.openjpa.persistence.query">Predicate</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#isEmpty()">isEmpty</A></B>()</CODE> | |
<BR> | |
Add a restriction that the path expression must correspond to an | |
association or element collection that is empty (has no elements).</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#max()">max</A></B>()</CODE> | |
<BR> | |
Specify that the max operation is to be applied.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#min()">min</A></B>()</CODE> | |
<BR> | |
Specify that the min operation is to be applied.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#size()">size</A></B>()</CODE> | |
<BR> | |
Return an expression that corresponds to the number of elements | |
association or element collection corresponding to the path expression.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#sum()">sum</A></B>()</CODE> | |
<BR> | |
Specify that the sum operation is to be applied.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</A></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#type()">type</A></B>()</CODE> | |
<BR> | |
Return an expression that corresponds to the type of the entity.</TD> | |
</TR> | |
</TABLE> | |
<A NAME="methods_inherited_from_class_org.apache.openjpa.persistence.query.Expression"><!-- --></A> | |
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> | |
<TH ALIGN="left"><B>Methods inherited from interface org.apache.openjpa.persistence.query.<A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</A></B></TH> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD><CODE><A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#abs()">abs</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#concat(org.apache.openjpa.persistence.query.Expression...)">concat</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#concat(java.lang.String...)">concat</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#dividedBy(org.apache.openjpa.persistence.query.Expression)">dividedBy</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#dividedBy(java.lang.Number)">dividedBy</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.Class...)">in</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.Enum...)">in</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(org.apache.openjpa.persistence.query.Expression...)">in</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.Number...)">in</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.String...)">in</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(org.apache.openjpa.persistence.query.Subquery)">in</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#isNull()">isNull</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#length()">length</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(org.apache.openjpa.persistence.query.Expression)">locate</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(org.apache.openjpa.persistence.query.Expression, org.apache.openjpa.persistence.query.Expression)">locate</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(org.apache.openjpa.persistence.query.Expression, int)">locate</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(java.lang.String)">locate</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(java.lang.String, org.apache.openjpa.persistence.query.Expression)">locate</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(java.lang.String, int)">locate</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#lower()">lower</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#member(org.apache.openjpa.persistence.query.PathExpression)">member</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#minus()">minus</A>, <A 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HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(org.apache.openjpa.persistence.query.Expression, org.apache.openjpa.persistence.query.Expression)">substring</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(org.apache.openjpa.persistence.query.Expression, int)">substring</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(int)">substring</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(int, org.apache.openjpa.persistence.query.Expression)">substring</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(int, int)">substring</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#times(org.apache.openjpa.persistence.query.Expression)">times</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#times(java.lang.Number)">times</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim()">trim</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(char)">trim</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(char, org.apache.openjpa.persistence.query.TrimSpec)">trim</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(org.apache.openjpa.persistence.query.Expression)">trim</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(org.apache.openjpa.persistence.query.Expression, org.apache.openjpa.persistence.query.TrimSpec)">trim</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(org.apache.openjpa.persistence.query.TrimSpec)">trim</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html#upper()">upper</A></CODE></TD> | |
</TR> | |
</TABLE> | |
<A NAME="methods_inherited_from_class_org.apache.openjpa.persistence.query.SelectItem"><!-- --></A> | |
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> | |
<TH ALIGN="left"><B>Methods inherited from interface org.apache.openjpa.persistence.query.<A HREF="../../../../../org/apache/openjpa/persistence/query/SelectItem.html" title="interface in org.apache.openjpa.persistence.query">SelectItem</A></B></TH> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD><CODE><A HREF="../../../../../org/apache/openjpa/persistence/query/SelectItem.html#asc()">asc</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/SelectItem.html#desc()">desc</A></CODE></TD> | |
</TR> | |
</TABLE> | |
<A NAME="methods_inherited_from_class_org.apache.openjpa.persistence.query.PredicateOperand"><!-- --></A> | |
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> | |
<TH ALIGN="left"><B>Methods inherited from interface org.apache.openjpa.persistence.query.<A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html" title="interface in org.apache.openjpa.persistence.query">PredicateOperand</A></B></TH> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD><CODE><A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Calendar, java.util.Calendar)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Calendar, org.apache.openjpa.persistence.query.PredicateOperand)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Date, java.util.Date)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Date, org.apache.openjpa.persistence.query.PredicateOperand)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.lang.Number, java.lang.Number)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.lang.Number, org.apache.openjpa.persistence.query.PredicateOperand)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(org.apache.openjpa.persistence.query.PredicateOperand, java.util.Calendar)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(org.apache.openjpa.persistence.query.PredicateOperand, java.util.Date)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(org.apache.openjpa.persistence.query.PredicateOperand, java.lang.Number)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(org.apache.openjpa.persistence.query.PredicateOperand, org.apache.openjpa.persistence.query.PredicateOperand)">between</A>, <A HREF="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(org.apache.openjpa.persistence.query.PredicateOperand, java.lang.String)">between</A>, <A 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<A NAME="get(java.lang.String)"><!-- --></A><H3> | |
get</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/PathExpression.html" title="interface in org.apache.openjpa.persistence.query">PathExpression</A> <B>get</B>(<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> attributeName)</PRE> | |
<DL> | |
<DD>Return a path expression corresponding to the referenced attribute. It is | |
not permitted to invoke this method on a path expression that corresponds | |
to a multi-valued association or element collection. The path expression | |
on which this method is invoked must correspond to a class containing the | |
referenced attribute. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Parameters:</B><DD><CODE>attributeName</CODE> - - | |
name of the referenced attribute | |
<DT><B>Returns:</B><DD>path expression</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="type()"><!-- --></A><H3> | |
type</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</A> <B>type</B>()</PRE> | |
<DL> | |
<DD>Return an expression that corresponds to the type of the entity. This | |
method can only be invoked on a path expression corresponding to an | |
entity. It is not permitted to invoke this method on a path expression | |
that corresponds to a multi-valued association. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>expression denoting the entity's type</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="size()"><!-- --></A><H3> | |
size</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</A> <B>size</B>()</PRE> | |
<DL> | |
<DD>Return an expression that corresponds to the number of elements | |
association or element collection corresponding to the path expression. | |
This method can only be invoked on a path expression that corresponds to | |
a multi-valued association or to an element collection. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>expression denoting the size</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="isEmpty()"><!-- --></A><H3> | |
isEmpty</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Predicate.html" title="interface in org.apache.openjpa.persistence.query">Predicate</A> <B>isEmpty</B>()</PRE> | |
<DL> | |
<DD>Add a restriction that the path expression must correspond to an | |
association or element collection that is empty (has no elements). This | |
method can only be invoked on a path expression that corresponds to a | |
multi-valued association or to an element collection. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>predicate corresponding to the restriction</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="avg()"><!-- --></A><H3> | |
avg</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A> <B>avg</B>()</PRE> | |
<DL> | |
<DD>Specify that the avg operation is to be applied. The path expression must | |
correspond to an attribute of a numeric type. It is not permitted to | |
invoke this method on a path expression that corresponds to a | |
multi-valued association or element collection. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>the resulting aggregate</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="max()"><!-- --></A><H3> | |
max</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A> <B>max</B>()</PRE> | |
<DL> | |
<DD>Specify that the max operation is to be applied. The path expression must | |
correspond to an attribute of an orderable type. It is not permitted to | |
invoke this method on a path expression that corresponds to a | |
multi-valued association or element collection. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>the resulting aggregate</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="min()"><!-- --></A><H3> | |
min</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A> <B>min</B>()</PRE> | |
<DL> | |
<DD>Specify that the min operation is to be applied. The path expression must | |
correspond to an attribute of an orderable type. It is not permitted to | |
invoke this method on a path expression that corresponds to a | |
multi-valued association or element collection. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>the resulting aggregate</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="count()"><!-- --></A><H3> | |
count</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A> <B>count</B>()</PRE> | |
<DL> | |
<DD>Specify that the count operation is to be applied. It is not permitted to | |
invoke this method on a path expression that corresponds to a | |
multi-valued association or element collection. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>the resulting aggregate</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="sum()"><!-- --></A><H3> | |
sum</H3> | |
<PRE> | |
<A HREF="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</A> <B>sum</B>()</PRE> | |
<DL> | |
<DD>Specify that the sum operation is to be applied. The path expression must | |
correspond to an attribute of a numeric type. It is not permitted to | |
invoke this method on a path expression that corresponds to a | |
multi-valued association or element collection. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>the resulting aggregate</DL> | |
</DD> | |
</DL> | |
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