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package com.jclark.xsl.conv;
import java.net.URL;
import java.util.Hashtable;
public class NumberListFormat implements Cloneable {
static private NumberFormat defaultFormat = new DecimalNumberFormat('0', 1);
static private Hashtable formatTokenHandlerTable = new Hashtable();
static {
NumberFormat format = new AlphabetNumberFormat("abcdefghijklmnopqrstuvwxyz");
AlphabetFormatTokenHandler handler = new AlphabetFormatTokenHandler(format);
formatTokenHandlerTable.put("a", handler);
format = new AlphabetNumberFormat("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
handler = new AlphabetFormatTokenHandler(format);
formatTokenHandlerTable.put("A", handler);
formatTokenHandlerTable.put("i", new RomanNumberFormat("mdclxvi"));
formatTokenHandlerTable.put("I", new RomanNumberFormat("MDCLXVI"));
}
private NumberFormat[] formats = null;
private String[] formatTokens = new String[] { "1" };
private String prefix = "";
private String suffix = "";
// i-th element is separator between i-th and i+1-th number
private String[] separators = new String[] { "." };
private int groupingSize = 0;
private String groupingSeparator = null;
private String lang = null;
private String letterValue = null;
public static
void setFormatTokenHandler(String formatToken, FormatTokenHandler handler) {
formatTokenHandlerTable.put(formatToken, handler);
}
public void setFormat(String format) {
formats = null;
int n = 0;
for (int i = 0; i < format.length(); i++) {
if (isAlnum(format.charAt(i))
&& (i == 0 || !isAlnum(format.charAt(i - 1))))
n++;
}
if (n == 0) {
formatTokens = new String[1];
formatTokens[0] = "1";
prefix = "";
}
else
formatTokens = new String[n];
if (n <= 1) {
separators = new String[1];
separators[0] = ".";
}
else
separators = new String[n - 1];
int fi = 0;
for (int i = 0; i < n; i++) {
int sepStart = fi;
while (!isAlnum(format.charAt(fi)))
fi++;
if (i == 0)
prefix = format.substring(0, fi);
else
separators[i - 1] = format.substring(sepStart, fi);
int numberStart = fi++;
while (fi < format.length() && isAlnum(format.charAt(fi)))
fi++;
formatTokens[i] = format.substring(numberStart, fi);
}
suffix = format.substring(fi);
}
static private boolean isAlnum(char c) {
switch (Character.getType(c)) {
case Character.UPPERCASE_LETTER:
case Character.LOWERCASE_LETTER:
case Character.TITLECASE_LETTER:
case Character.MODIFIER_LETTER:
case Character.OTHER_LETTER:
case Character.DECIMAL_DIGIT_NUMBER:
case Character.LETTER_NUMBER:
case Character.OTHER_NUMBER:
return true;
}
return false;
}
public void setLang(String lang) {
formats = null;
this.lang = lang;
}
public void setLetterValue(String letterValue) {
this.letterValue = letterValue;
}
public void setGroupingSeparator(String sep) {
if (sep == null || sep.length() == 0)
groupingSeparator = null;
else
groupingSeparator = sep;
}
public void setGroupingSize(int n) {
groupingSize = n;
}
public String getPrefix(int i) {
if (i == 0)
return prefix;
i -= 1;
if (i < separators.length)
return separators[i];
return separators[separators.length - 1];
}
public String formatNumber(int i, int n) {
if (n < 0)
throw new IllegalArgumentException("cannot format negative number");
return group(getFormat(i).format(n));
}
public String getSuffix() {
return suffix;
}
private NumberFormat getFormat(int i) {
if (formats == null)
formats = new NumberFormat[formatTokens.length];
if (i >= formats.length)
i = formats.length - 1;
if (formats[i] == null)
formats[i] = findFormat(formatTokens[i]);
return formats[i];
}
private NumberFormat findFormat(String formatToken) {
NumberFormat f = findDecimalFormat(formatToken);
if (f != null)
return f;
FormatTokenHandler handler = (FormatTokenHandler)formatTokenHandlerTable.get(formatToken);
if (handler != null) {
f = handler.getFormat(lang, letterValue);
if (f != null)
return f;
}
return defaultFormat;
}
private NumberFormat findDecimalFormat(String format) {
char digitOne = format.charAt(format.length() - 1);
if (!Character.isDigit(digitOne) || Character.digit(digitOne, 10) != 1)
return null;
for (int i = 0; i < format.length() - 1; i++)
if (format.charAt(i) + 1 != digitOne)
return null;
return new DecimalNumberFormat((char)(digitOne - 1), format.length());
}
private String group(String number) {
if (groupingSeparator == null || groupingSize <= 0 || number.length() <= groupingSize)
return number;
char buf[] = new char[number.length() + ((number.length() - 1)/groupingSize) * groupingSeparator.length()];
int j = 0;
for (int i = 0; i < number.length(); i++) {
if (i > 0 && (number.length() - i) % groupingSize == 0) {
for (int k = 0; k < groupingSeparator.length(); k++)
buf[j++] = groupingSeparator.charAt(k);
}
buf[j++] = number.charAt(i);
}
return new String(buf);
}
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException e) {
throw new InternalError();
}
}
}
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