org.jruby.util.TimeOutputFormatter Maven / Gradle / Ivy
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package org.jruby.util;
import org.jruby.util.RubyDateFormat.FieldType;
/**
* Support for GNU-C output formatters, see: http://www.gnu.org/software/libc/manual/html_node/Formatting-Calendar-Time.html
*/
@Deprecated
public class TimeOutputFormatter {
final String format;
final int width;
public final static TimeOutputFormatter DEFAULT_FORMATTER = new TimeOutputFormatter("", 0);
public TimeOutputFormatter(String format, int width) {
this.format = format;
this.width = width;
}
// Really ugly stop-gap method to eliminate using regexp for create TimeOutputFormatter.
// FIXME: Make all of strftime an honest to goodness parser
public static TimeOutputFormatter getFormatter(String pattern) {
int length = pattern.length();
if (length <= 1 || pattern.charAt(0) != '%') {
return null;
}
int width = 0;
int i = 1;
boolean done = false;
boolean formatterFound = false;
for (; i < length && !done; i++) {
char c = pattern.charAt(i);
switch(c) {
case '-': case '_': case '0': case '^': case '#': case ':':
formatterFound = true;
break;
case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
width = Character.getNumericValue(c);
done = true;
break;
default:
done = true;
break;
}
}
if (width == 0 && !formatterFound) return null;
String format;
if (i > 2) { // found something
format = pattern.substring(1, i-1);
} else {
format = "";
}
// We found some formatting instructions but no padding values.
if (width == 0 && i > 2) {
return new TimeOutputFormatter(format, 0);
}
done = false;
for (; i < length && !done; i++) {
char c = pattern.charAt(i);
switch(c) {
case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9': case '0':
width = 10 * width + Character.getNumericValue(c);
break;
case ':':
format += ':'; /* Make it part of the format */
break;
default:
done = true;
break;
}
}
if (width != 0) {
return new TimeOutputFormatter(format, width);
}
return null;
}
public String getFormat() {
return format + (width > 0 ? width : "");
}
public int getNumberOfColons() {
int colons = 0;
for (int i = 0; i < format.length(); i++) {
if (format.charAt(i) == ':') {
colons++;
}
}
return colons;
}
public int getWidth(int defaultWidth) {
if (format.contains("-")) { // no padding
return 0;
}
return this.width != 0 ? this.width : defaultWidth;
}
public char getPadder(char defaultPadder) {
char padder = defaultPadder;
for (int i = 0; i < format.length(); i++) {
switch (format.charAt(i)) {
case '_':
padder = ' ';
break;
case '0':
padder = '0';
break;
case '-': // no padding
padder = '\0';
break;
}
}
return padder;
}
public String format(String sequence, long value, FieldType type) {
int width = getWidth(type.defaultWidth);
char padder = getPadder(type.defaultPadder);
if (sequence == null) {
sequence = formatNumber(value, width, padder);
} else {
sequence = padding(sequence, width, padder);
}
for (int i = 0; i < format.length(); i++) {
switch (format.charAt(i)) {
case '^':
sequence = sequence.toUpperCase();
break;
case '#': // change case
char last = sequence.charAt(sequence.length() - 1);
if (Character.isLowerCase(last)) {
sequence = sequence.toUpperCase();
} else {
sequence = sequence.toLowerCase();
}
break;
}
}
return sequence;
}
static String formatNumber(long value, int width, char padder) {
if (value >= 0 || padder != '0') {
return padding(Long.toString(value), width, padder);
} else {
return "-" + padding(Long.toString(-value), width - 1, padder);
}
}
static String formatSignedNumber(long value, int width, char padder) {
if (padder == '0') {
if (value >= 0) {
return "+" + padding(Long.toString(value), width - 1, padder);
} else {
return "-" + padding(Long.toString(-value), width - 1, padder);
}
} else {
if (value >= 0) {
return padding("+" + Long.toString(value), width, padder);
} else {
return padding(Long.toString(value), width, padder);
}
}
}
static String padding(String sequence, int width, char padder) {
if (sequence.length() >= width) {
return sequence;
}
StringBuilder buf = new StringBuilder(width + sequence.length());
for (int i = sequence.length(); i < width; i++) {
buf.append(padder);
}
buf.append(sequence);
return buf.toString();
}
}
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