/*****************************************************************************
SQLJEP - Java SQL Expression Parser 0.2
November 1 2006
(c) Copyright 2006, Alexey Gaidukov
SQLJEP Author: Alexey Gaidukov
SQLJEP is based on JEP 2.24 (http://www.singularsys.com/jep/)
(c) Copyright 2002, Nathan Funk
See LICENSE.txt for license information.
*****************************************************************************/
package com.meidusa.amoeba.sqljep.function;
import java.util.Calendar;
import java.sql.*;
import static java.util.Calendar.*;
import com.meidusa.amoeba.sqljep.function.PostfixCommand;
import com.meidusa.amoeba.sqljep.ASTFunNode;
import com.meidusa.amoeba.sqljep.JepRuntime;
import com.meidusa.amoeba.sqljep.ParseException;
public class LastDay extends PostfixCommand {
final public int getNumberOfParameters() {
return 1;
}
public Comparable<?>[] evaluate(ASTFunNode node, JepRuntime runtime) throws ParseException {
node.childrenAccept(runtime.ev, null);
Comparable<?> param = runtime.stack.pop();
return new Comparable<?>[]{param};
}
public static java.util.Date lastDay(Comparable<?> param, Calendar cal) throws ParseException {
if (param == null) {
return null;
}
if (param instanceof Timestamp || param instanceof java.sql.Date) {
java.util.Date d = (java.util.Date)param;
cal.setTimeInMillis(d.getTime());
int day = cal.getActualMaximum(DAY_OF_MONTH);
cal.set(DATE, day);
return new java.util.Date(cal.getTimeInMillis());
} else {
throw new ParseException(WRONG_TYPE+" last_day("+param.getClass()+")");
}
}
public Comparable<?> getResult(Comparable<?>... comparables)
throws ParseException {
return lastDay(comparables[0], JepRuntime.getCalendar());
}
}