AggregateFunction (JBoss Server API) - JBoss 4.0.1 sp1 server API Documentation 英文版文档

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org.jboss.ejb.plugins.cmp.ejbql
Class AggregateFunction

java.lang.Object
  org.jboss.ejb.plugins.cmp.ejbql.SimpleNode
      org.jboss.ejb.plugins.cmp.ejbql.AggregateFunction

All Implemented Interfaces:: SelectFunction

Direct Known Subclasses:: ASTAvg, ASTCount, ASTMax, ASTMin, ASTSum

public abstract class AggregateFunction
extends SimpleNode
implements SelectFunction

Version:: $Revision: 1.3 $
Author:: Alexey Loubyansky

Field Summary

String distinct


Fields inherited from class org.jboss.ejb.plugins.cmp.ejbql.SimpleNode

children, id, parent

Constructor Summary

AggregateFunction(int i)


Method Summary

protected Class getDefaultResultType()


Object readResult(ResultSet rs)
          Reads results.

void setResultType(Class type)


Methods inherited from class org.jboss.ejb.plugins.cmp.ejbql.SimpleNode

dump, jjtAccept, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, toString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

distinct

public String distinct

Constructor Detail

AggregateFunction

public AggregateFunction(int i)

Method Detail

setResultType

public void setResultType(Class type)

getDefaultResultType

protected Class getDefaultResultType()

readResult

public Object readResult(ResultSet rs)
                  throws SQLException

Description copied from interface: SelectFunction

Reads results.

Specified by:: readResult in interface SelectFunction

Parameters:: rs - the result set to read from.
Returns:: the result of the function
Throws:: SQLException