/*****************************************************************************
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.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
import com.meidusa.amoeba.sqljep.ASTFunNode;
import com.meidusa.amoeba.sqljep.BaseJEP;
import com.meidusa.amoeba.sqljep.JepRuntime;
import com.meidusa.amoeba.sqljep.ParseException;
public class ToDate extends PostfixCommand {
static final String PARAM_EXCEPTION = "Format shoud be string";
private static final String FORMAT_EXCEPTION = "Wrong timestamp";
final public int getNumberOfParameters() {
return -1;
}
public Comparable<?>[] evaluate(ASTFunNode node, JepRuntime runtime) throws ParseException {
node.childrenAccept(runtime.ev, null);
int num = node.jjtGetNumChildren();
if (num == 1) {
Comparable<?> param1 = runtime.stack.pop();
return new Comparable<?>[]{param1};
}
else if (num == 2) {
Comparable<?> param2 = runtime.stack.pop();
Comparable<?> param1 = runtime.stack.pop();
return new Comparable<?>[]{param1,param2};
} else {
// remove all parameters from stack and push null
removeParams(runtime.stack, num);
throw new ParseException("Wrong number of parameters for instr");
}
}
public static java.util.Date to_date(Comparable<?> param1) throws ParseException {
if (param1 == null) {
return null;
}
else if (param1 instanceof String) {
return Timestamp.valueOf((String)param1);
} else {
throw new ParseException(FORMAT_EXCEPTION);
}
}
public static java.util.Date to_date(Comparable<?> param1, Comparable<?> param2) throws ParseException {
if (param1 == null || param2 == null) {
return null;
}
if (param1 instanceof String && ((String)param1).length() == 0) {
return null;
}
if (param1 instanceof java.util.Date) {
return (java.util.Date)param1;
}
if (!(param1 instanceof String) || !(param2 instanceof String)) {
throw new ParseException(WRONG_TYPE+" to_date("+param1.getClass()+","+param2.getClass()+")");
}
try {
OracleTimestampFormat format = new OracleTimestampFormat((String)param2);
return (java.util.Date)format.parseObject((String)param1);
} catch (java.text.ParseException e) {
if (BaseJEP.debug) {
e.printStackTrace();
}
throw new ParseException(e.getMessage());
}
}
public static void main(String[] args) throws ParseException{
System.out.println(to_date("99-00-00 00:00:0000"));
Date.valueOf("1999-11-21").getTime();
Calendar long2 = Calendar.getInstance();
long2.setTime(Time.valueOf("00:01:0000"));
Calendar cal = Calendar.getInstance();
cal.setTime(Date.valueOf("1999-11-21"));
cal.add(Calendar.HOUR, long2.get(Calendar.HOUR));
cal.add(Calendar.MINUTE, long2.get(Calendar.MINUTE));
cal.add(Calendar.SECOND, long2.get(Calendar.SECOND));
cal.add(Calendar.MILLISECOND, long2.get(Calendar.MILLISECOND));
System.out.println(cal.getTime());
System.out.println(Date.valueOf("1999-11-21").getTime());
System.out.println(Time.valueOf("00:00:0000").getTime());
}
public Comparable<?> getResult(Comparable<?>... comparables)
throws ParseException {
if(comparables.length == 1){
if (comparables[0] instanceof String) {
return (Timestamp.valueOf((String)comparables[0]));
} else {
throw new ParseException(FORMAT_EXCEPTION);
}
}else{
return to_date(comparables[0],comparables[1]);
}
}
}