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- /* ====================================================================
- 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.format;
-
- import java.text.AttributedCharacterIterator;
- import java.text.CharacterIterator;
- import java.text.DateFormat;
- import java.text.SimpleDateFormat;
- import java.util.Calendar;
- import java.util.Date;
- import java.util.Formatter;
- import java.util.regex.Matcher;
-
- /**
- * Formats a date value.
- *
- * @author Ken Arnold, Industrious Media LLC
- */
- public class CellDateFormatter extends CellFormatter {
- private boolean amPmUpper;
- private boolean showM;
- private boolean showAmPm;
- private final DateFormat dateFmt;
- private String sFmt;
-
- private static final long EXCEL_EPOCH_TIME;
- private static final Date EXCEL_EPOCH_DATE;
-
- private static final CellFormatter SIMPLE_DATE = new CellDateFormatter(
- "mm/d/y");
-
- static {
- Calendar c = Calendar.getInstance();
- c.set(1904, 0, 1, 0, 0, 0);
- EXCEL_EPOCH_DATE = c.getTime();
- EXCEL_EPOCH_TIME = c.getTimeInMillis();
- }
-
- private class DatePartHandler implements CellFormatPart.PartHandler {
- private int mStart = -1;
- private int mLen;
- private int hStart = -1;
- private int hLen;
-
- public String handlePart(Matcher m, String part, CellFormatType type,
- StringBuffer desc) {
-
- int pos = desc.length();
- char firstCh = part.charAt(0);
- switch (firstCh) {
- case 's':
- case 'S':
- if (mStart >= 0) {
- for (int i = 0; i < mLen; i++)
- desc.setCharAt(mStart + i, 'm');
- mStart = -1;
- }
- return part.toLowerCase();
-
- case 'h':
- case 'H':
- mStart = -1;
- hStart = pos;
- hLen = part.length();
- return part.toLowerCase();
-
- case 'd':
- case 'D':
- mStart = -1;
- if (part.length() <= 2)
- return part.toLowerCase();
- else
- return part.toLowerCase().replace('d', 'E');
-
- case 'm':
- case 'M':
- mStart = pos;
- mLen = part.length();
- return part.toUpperCase();
-
- case 'y':
- case 'Y':
- mStart = -1;
- if (part.length() == 3)
- part = "yyyy";
- return part.toLowerCase();
-
- case '0':
- mStart = -1;
- int sLen = part.length();
- sFmt = "%0" + (sLen + 2) + "." + sLen + "f";
- return part.replace('0', 'S');
-
- case 'a':
- case 'A':
- case 'p':
- case 'P':
- if (part.length() > 1) {
- // am/pm marker
- mStart = -1;
- showAmPm = true;
- showM = Character.toLowerCase(part.charAt(1)) == 'm';
- // For some reason "am/pm" becomes AM or PM, but "a/p" becomes a or p
- amPmUpper = showM || Character.isUpperCase(part.charAt(0));
-
- return "a";
- }
- //noinspection fallthrough
-
- default:
- return null;
- }
- }
-
- public void finish(StringBuffer toAppendTo) {
- if (hStart >= 0 && !showAmPm) {
- for (int i = 0; i < hLen; i++) {
- toAppendTo.setCharAt(hStart + i, 'H');
- }
- }
- }
- }
-
- /**
- * Creates a new date formatter with the given specification.
- *
- * @param format The format.
- */
- public CellDateFormatter(String format) {
- super(format);
- DatePartHandler partHandler = new DatePartHandler();
- StringBuffer descBuf = CellFormatPart.parseFormat(format,
- CellFormatType.DATE, partHandler);
- partHandler.finish(descBuf);
- dateFmt = new SimpleDateFormat(descBuf.toString());
- }
-
- /** {@inheritDoc} */
- public void formatValue(StringBuffer toAppendTo, Object value) {
- if (value == null)
- value = 0.0;
- if (value instanceof Number) {
- Number num = (Number) value;
- double v = num.doubleValue();
- if (v == 0.0)
- value = EXCEL_EPOCH_DATE;
- else
- value = new Date((long) (EXCEL_EPOCH_TIME + v));
- }
-
- AttributedCharacterIterator it = dateFmt.formatToCharacterIterator(
- value);
- boolean doneAm = false;
- boolean doneMillis = false;
-
- it.first();
- for (char ch = it.first();
- ch != CharacterIterator.DONE;
- ch = it.next()) {
- if (it.getAttribute(DateFormat.Field.MILLISECOND) != null) {
- if (!doneMillis) {
- Date dateObj = (Date) value;
- int pos = toAppendTo.length();
- Formatter formatter = new Formatter(toAppendTo);
- long msecs = dateObj.getTime() % 1000;
- formatter.format(LOCALE, sFmt, msecs / 1000.0);
- toAppendTo.delete(pos, pos + 2);
- doneMillis = true;
- }
- } else if (it.getAttribute(DateFormat.Field.AM_PM) != null) {
- if (!doneAm) {
- if (showAmPm) {
- if (amPmUpper) {
- toAppendTo.append(Character.toUpperCase(ch));
- if (showM)
- toAppendTo.append('M');
- } else {
- toAppendTo.append(Character.toLowerCase(ch));
- if (showM)
- toAppendTo.append('m');
- }
- }
- doneAm = true;
- }
- } else {
- toAppendTo.append(ch);
- }
- }
- }
-
- /**
- * {@inheritDoc}
- * <p/>
- * For a date, this is <tt>"mm/d/y"</tt>.
- */
- public void simpleValue(StringBuffer toAppendTo, Object value) {
- SIMPLE_DATE.formatValue(toAppendTo, value);
- }
- }
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