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Apache POI - Java API To Access Microsoft Format Files
/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.ss.usermodel;
import java.util.*;
import org.apache.poi.util.LocaleUtil;
import java.math.RoundingMode;
import java.text.*;
/**
* A wrapper around a {@link SimpleDateFormat} instance,
* which handles a few Excel-style extensions that
* are not supported by {@link SimpleDateFormat}.
* Currently, the extensions are around the handling
* of elapsed time, eg rendering 1 day 2 hours
* as 26 hours.
*/
public class ExcelStyleDateFormatter extends SimpleDateFormat {
public static final char MMMMM_START_SYMBOL = '\ue001';
public static final char MMMMM_TRUNCATE_SYMBOL = '\ue002';
public static final char H_BRACKET_SYMBOL = '\ue010';
public static final char HH_BRACKET_SYMBOL = '\ue011';
public static final char M_BRACKET_SYMBOL = '\ue012';
public static final char MM_BRACKET_SYMBOL = '\ue013';
public static final char S_BRACKET_SYMBOL = '\ue014';
public static final char SS_BRACKET_SYMBOL = '\ue015';
public static final char L_BRACKET_SYMBOL = '\ue016';
public static final char LL_BRACKET_SYMBOL = '\ue017';
private static final DecimalFormat format1digit;
private static final DecimalFormat format2digits;
private static final DecimalFormat format3digit;
private static final DecimalFormat format4digits;
static {
DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(Locale.ROOT);
format1digit = new DecimalFormat("0", dfs);
format2digits = new DecimalFormat("00", dfs);
format3digit = new DecimalFormat("0", dfs);
format4digits = new DecimalFormat("00", dfs);
DataFormatter.setExcelStyleRoundingMode(format1digit, RoundingMode.DOWN);
DataFormatter.setExcelStyleRoundingMode(format2digits, RoundingMode.DOWN);
DataFormatter.setExcelStyleRoundingMode(format3digit);
DataFormatter.setExcelStyleRoundingMode(format4digits);
}
{
setTimeZone(LocaleUtil.getUserTimeZone());
}
private double dateToBeFormatted;
// no-arg constructor is private because of undefined super call with locale
public ExcelStyleDateFormatter(String pattern) {
super(processFormatPattern(pattern), LocaleUtil.getUserLocale());
}
public ExcelStyleDateFormatter(String pattern,
DateFormatSymbols formatSymbols) {
super(processFormatPattern(pattern), formatSymbols);
}
public ExcelStyleDateFormatter(String pattern, Locale locale) {
super(processFormatPattern(pattern), locale);
}
/**
* Takes a format String, and replaces Excel specific bits
* with our detection sequences
*/
private static String processFormatPattern(String f) {
String t = f.replaceAll("MMMMM", MMMMM_START_SYMBOL + "MMM" + MMMMM_TRUNCATE_SYMBOL);
t = t.replaceAll("\\[H]", String.valueOf(H_BRACKET_SYMBOL));
t = t.replaceAll("\\[HH]", String.valueOf(HH_BRACKET_SYMBOL));
t = t.replaceAll("\\[m]", String.valueOf(M_BRACKET_SYMBOL));
t = t.replaceAll("\\[mm]", String.valueOf(MM_BRACKET_SYMBOL));
t = t.replaceAll("\\[s]", String.valueOf(S_BRACKET_SYMBOL));
t = t.replaceAll("\\[ss]", String.valueOf(SS_BRACKET_SYMBOL));
t = t.replaceAll("s.000", "s.SSS");
t = t.replaceAll("s.00", "s." + LL_BRACKET_SYMBOL);
t = t.replaceAll("s.0", "s." + L_BRACKET_SYMBOL);
return t;
}
/**
* Used to let us know what the date being
* formatted is, in Excel terms, which we
* may wish to use when handling elapsed
* times.
*/
public void setDateToBeFormatted(double date) {
this.dateToBeFormatted = date;
}
@Override
public StringBuffer format(Date date, StringBuffer paramStringBuffer,
FieldPosition paramFieldPosition) {
// Do the normal format
String s = super.format(date, paramStringBuffer, paramFieldPosition).toString();
// Now handle our special cases
if (s.indexOf(MMMMM_START_SYMBOL) != -1) {
s = s.replaceAll(
MMMMM_START_SYMBOL + "(\\p{L}|\\p{P})[\\p{L}\\p{P}]+" + MMMMM_TRUNCATE_SYMBOL,
"$1"
);
}
if (s.indexOf(H_BRACKET_SYMBOL) != -1 ||
s.indexOf(HH_BRACKET_SYMBOL) != -1) {
float hours = (float) dateToBeFormatted * 24;
s = s.replaceAll(
String.valueOf(H_BRACKET_SYMBOL),
format1digit.format(hours)
);
s = s.replaceAll(
String.valueOf(HH_BRACKET_SYMBOL),
format2digits.format(hours)
);
}
if (s.indexOf(M_BRACKET_SYMBOL) != -1 ||
s.indexOf(MM_BRACKET_SYMBOL) != -1) {
float minutes = (float) dateToBeFormatted * 24 * 60;
s = s.replaceAll(
String.valueOf(M_BRACKET_SYMBOL),
format1digit.format(minutes)
);
s = s.replaceAll(
String.valueOf(MM_BRACKET_SYMBOL),
format2digits.format(minutes)
);
}
if (s.indexOf(S_BRACKET_SYMBOL) != -1 ||
s.indexOf(SS_BRACKET_SYMBOL) != -1) {
float seconds = (float) (dateToBeFormatted * 24.0 * 60.0 * 60.0);
s = s.replaceAll(
String.valueOf(S_BRACKET_SYMBOL),
format1digit.format(seconds)
);
s = s.replaceAll(
String.valueOf(SS_BRACKET_SYMBOL),
format2digits.format(seconds)
);
}
if (s.indexOf(L_BRACKET_SYMBOL) != -1 ||
s.indexOf(LL_BRACKET_SYMBOL) != -1) {
float millisTemp = (float) ((dateToBeFormatted - Math.floor(dateToBeFormatted)) * 24.0 * 60.0 * 60.0);
float millis = (millisTemp - (int) millisTemp);
s = s.replaceAll(
String.valueOf(L_BRACKET_SYMBOL),
format3digit.format(millis * 10)
);
s = s.replaceAll(
String.valueOf(LL_BRACKET_SYMBOL),
format4digits.format(millis * 100)
);
}
return new StringBuffer(s);
}
@Override
public boolean equals(Object o) {
if (!(o instanceof ExcelStyleDateFormatter)) {
return false;
}
ExcelStyleDateFormatter other = (ExcelStyleDateFormatter) o;
return dateToBeFormatted == other.dateToBeFormatted;
}
@Override
public int hashCode() {
return Double.valueOf(dateToBeFormatted).hashCode();
}
}