package com.google.gson.internal;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Locale;
public class PreJava9DateFormatProvider {
public static DateFormat getUSDateFormat(int style) {
return new SimpleDateFormat(getDateFormatPattern(style), Locale.US);
}
public static DateFormat getUSDateTimeFormat(int dateStyle, int timeStyle) {
String pattern = getDatePartOfDateTimePattern(dateStyle) + " " + getTimePartOfDateTimePattern(timeStyle);
return new SimpleDateFormat(pattern, Locale.US);
}
private static String getDateFormatPattern(int style) {
switch (style) {
case DateFormat.SHORT:
return "M/d/yy";
case DateFormat.MEDIUM:
return "MMM d, y";
case DateFormat.LONG:
return "MMMM d, y";
case DateFormat.FULL:
return "EEEE, MMMM d, y";
default:
throw new IllegalArgumentException("Unknown DateFormat style: " + style);
}
}
private static String getDatePartOfDateTimePattern(int dateStyle) {
switch (dateStyle) {
case DateFormat.SHORT:
return "M/d/yy";
case DateFormat.MEDIUM:
return "MMM d, yyyy";
case DateFormat.LONG:
return "MMMM d, yyyy";
case DateFormat.FULL:
return "EEEE, MMMM d, yyyy";
default:
throw new IllegalArgumentException("Unknown DateFormat style: " + dateStyle);
}
}
private static String getTimePartOfDateTimePattern(int timeStyle) {
switch (timeStyle) {
case DateFormat.SHORT:
return "h:mm a";
case DateFormat.MEDIUM:
return "h:mm:ss a";
case DateFormat.FULL:
case DateFormat.LONG:
return "h:mm:ss a z";
default:
throw new IllegalArgumentException("Unknown DateFormat style: " + timeStyle);
}
}
}