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net.razorvine.pickle.objects.DateTimeConstructor Maven / Gradle / Ivy
package net.razorvine.pickle.objects;
import java.util.Calendar;
import java.util.GregorianCalendar;
import net.razorvine.pickle.IObjectConstructor;
import net.razorvine.pickle.PickleException;
/**
* This constructor can create various datetime related objects.
*
* @author Irmen de Jong ([email protected] )
*/
public class DateTimeConstructor implements IObjectConstructor {
public static int DATETIME = 1;
public static int DATE = 2;
public static int TIME = 3;
public static int TIMEDELTA = 4;
private int pythontype;
public DateTimeConstructor(int pythontype) {
this.pythontype = pythontype;
}
public Object construct(Object[] args) {
if (this.pythontype == DATE)
return createDate(args);
if (this.pythontype == TIME)
return createTime(args);
if (this.pythontype == DATETIME)
return createDateTime(args);
if (this.pythontype == TIMEDELTA)
return createTimedelta(args);
throw new PickleException("invalid object type");
}
private TimeDelta createTimedelta(Object[] args) {
// python datetime.timedelta -> dt.TimeDelta
// args is a tuple of 3 ints: days,seconds,microseconds
if (args.length != 3)
throw new PickleException("invalid pickle data for timedelta; expected 3 args, got "+args.length);
int days=((Number)args[0]).intValue();
int seconds=((Number)args[1]).intValue();
int micro=((Number)args[2]).intValue();
return new TimeDelta(days, seconds, micro);
}
private Calendar createDateTime(Object[] args) {
// python datetime.time --> GregorianCalendar
// args is 10 bytes: yhi, ylo, month, day, hour, minute, second, ms1, ms2, ms3
// (can be String or byte[])
// alternate constructor is with 7 integer arguments: year, month, day, hour, minute, second, microseconds
if(args.length==7)
{
int year = (Integer)args[0];
int month = ((Integer)args[1]) - 1; // in java month starts with 0...
int day = (Integer)args[2];
int hour = (Integer)args[3];
int minute = (Integer)args[4];
int second = (Integer)args[5];
int microsec = (Integer)args[6];
Calendar cal = new GregorianCalendar(year, month, day, hour, minute, second);
cal.set(Calendar.MILLISECOND, microsec/1000);
return cal;
}
if (args.length != 1)
throw new PickleException("invalid pickle data for datetime; expected 1 or 7 args, got "+args.length);
int yhi, ylo, month, day, hour, minute, second, microsec;
if(args[0] instanceof String) {
String params = (String) args[0];
if (params.length() != 10)
throw new PickleException("invalid pickle data for datetime; expected arg of length 10, got length "+params.length());
yhi = params.charAt(0);
ylo = params.charAt(1);
month = params.charAt(2) - 1; // blargh: months start at 0 in Java
day = params.charAt(3);
hour = params.charAt(4);
minute = params.charAt(5);
second = params.charAt(6);
int ms1 = params.charAt(7);
int ms2 = params.charAt(8);
int ms3 = params.charAt(9);
microsec = ((ms1 << 8) | ms2) << 8 | ms3;
} else {
byte[] params=(byte[])args[0];
if (params.length != 10)
throw new PickleException("invalid pickle data for datetime; expected arg of length 10, got length "+params.length);
yhi=params[0]&0xff;
ylo=params[1]&0xff;
month=(params[2]&0xff) - 1; // blargh: months start at 0 in java
day=params[3]&0xff;
hour=params[4]&0xff;
minute=params[5]&0xff;
second=params[6]&0xff;
int ms1 = params[7]&0xff;
int ms2 = params[8]&0xff;
int ms3 = params[9]&0xff;
microsec = ((ms1 << 8) | ms2) << 8 | ms3;
}
Calendar cal = new GregorianCalendar(yhi * 256 + ylo, month, day, hour, minute, second);
cal.set(Calendar.MILLISECOND, microsec/1000);
return cal;
}
private Time createTime(Object[] args) {
// python datetime.time --> Time object
// args is 6 bytes: hour, minute, second, ms1,ms2,ms3 (String or byte[])
// alternate constructor passes 4 integers args: hour, minute, second, microsecond)
if (args.length==4)
{
int hour = (Integer) args[0];
int minute = (Integer) args[1];
int second = (Integer) args[2];
int microsec = (Integer) args[3];
return new Time(hour, minute, second, microsec);
}
if (args.length != 1)
throw new PickleException("invalid pickle data for time; expected 1 or 4 args, got "+args.length);
int hour, minute, second, microsec;
if(args[0] instanceof String) {
String params = (String) args[0];
if (params.length() != 6)
throw new PickleException("invalid pickle data for time; expected arg of length 6, got length "+params.length());
hour = params.charAt(0);
minute = params.charAt(1);
second = params.charAt(2);
int ms1 = params.charAt(3);
int ms2 = params.charAt(4);
int ms3 = params.charAt(5);
microsec = ((ms1 << 8) | ms2) << 8 | ms3;
} else {
byte[] params=(byte[])args[0];
if (params.length != 6)
throw new PickleException("invalid pickle data for datetime; expected arg of length 6, got length "+params.length);
hour=params[0]&0xff;
minute=params[1]&0xff;
second=params[2]&0xff;
int ms1 = params[3]&0xff;
int ms2 = params[4]&0xff;
int ms3 = params[5]&0xff;
microsec = ((ms1 << 8) | ms2) << 8 | ms3;
}
return new Time(hour, minute, second, microsec);
}
private Calendar createDate(Object[] args) {
// python datetime.date --> GregorianCalendar
// args is a string of 4 bytes yhi, ylo, month, day (String or byte[])
if (args.length != 1)
throw new PickleException("invalid pickle data for date; expected 1 arg, got "+args.length);
int yhi, ylo, month, day;
if(args[0] instanceof String) {
String params = (String) args[0];
if (params.length() != 4)
throw new PickleException("invalid pickle data for date; expected arg of length 4, got length "+params.length());
yhi = params.charAt(0);
ylo = params.charAt(1);
month = params.charAt(2) - 1; // blargh: months start at 0 in Java
day = params.charAt(3);
} else {
byte[] params=(byte[])args[0];
if (params.length != 4)
throw new PickleException("invalid pickle data for date; expected arg of length 4, got length "+params.length);
yhi=params[0]&0xff;
ylo=params[1]&0xff;
month=(params[2]&0xff) - 1; // blargh: months start at 0 in java
day=params[3]&0xff;
}
return new GregorianCalendar(yhi * 256 + ylo, month, day);
}
}
