213 lines
7.0 KiB
Java
213 lines
7.0 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.ss.format;
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import java.text.AttributedCharacterIterator;
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import java.text.CharacterIterator;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.Formatter;
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import java.util.regex.Matcher;
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/**
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* Formats a date value.
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*
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* @author Ken Arnold, Industrious Media LLC
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*/
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public class CellDateFormatter extends CellFormatter {
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private boolean amPmUpper;
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private boolean showM;
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private boolean showAmPm;
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private final DateFormat dateFmt;
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private String sFmt;
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private static final long EXCEL_EPOCH_TIME;
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private static final Date EXCEL_EPOCH_DATE;
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private static final CellFormatter SIMPLE_DATE = new CellDateFormatter(
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"mm/d/y");
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static {
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Calendar c = Calendar.getInstance();
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c.set(1904, 0, 1, 0, 0, 0);
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EXCEL_EPOCH_DATE = c.getTime();
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EXCEL_EPOCH_TIME = c.getTimeInMillis();
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}
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private class DatePartHandler implements CellFormatPart.PartHandler {
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private int mStart = -1;
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private int mLen;
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private int hStart = -1;
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private int hLen;
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public String handlePart(Matcher m, String part, CellFormatType type,
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StringBuffer desc) {
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int pos = desc.length();
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char firstCh = part.charAt(0);
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switch (firstCh) {
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case 's':
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case 'S':
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if (mStart >= 0) {
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for (int i = 0; i < mLen; i++)
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desc.setCharAt(mStart + i, 'm');
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mStart = -1;
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}
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return part.toLowerCase();
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case 'h':
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case 'H':
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mStart = -1;
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hStart = pos;
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hLen = part.length();
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return part.toLowerCase();
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case 'd':
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case 'D':
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mStart = -1;
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if (part.length() <= 2)
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return part.toLowerCase();
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else
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return part.toLowerCase().replace('d', 'E');
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case 'm':
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case 'M':
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mStart = pos;
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mLen = part.length();
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return part.toUpperCase();
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case 'y':
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case 'Y':
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mStart = -1;
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if (part.length() == 3)
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part = "yyyy";
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return part.toLowerCase();
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case '0':
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mStart = -1;
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int sLen = part.length();
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sFmt = "%0" + (sLen + 2) + "." + sLen + "f";
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return part.replace('0', 'S');
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case 'a':
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case 'A':
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case 'p':
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case 'P':
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if (part.length() > 1) {
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// am/pm marker
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mStart = -1;
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showAmPm = true;
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showM = Character.toLowerCase(part.charAt(1)) == 'm';
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// For some reason "am/pm" becomes AM or PM, but "a/p" becomes a or p
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amPmUpper = showM || Character.isUpperCase(part.charAt(0));
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return "a";
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}
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//noinspection fallthrough
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default:
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return null;
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}
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}
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public void finish(StringBuffer toAppendTo) {
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if (hStart >= 0 && !showAmPm) {
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for (int i = 0; i < hLen; i++) {
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toAppendTo.setCharAt(hStart + i, 'H');
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}
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}
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}
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}
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/**
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* Creates a new date formatter with the given specification.
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*
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* @param format The format.
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*/
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public CellDateFormatter(String format) {
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super(format);
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DatePartHandler partHandler = new DatePartHandler();
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StringBuffer descBuf = CellFormatPart.parseFormat(format,
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CellFormatType.DATE, partHandler);
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partHandler.finish(descBuf);
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dateFmt = new SimpleDateFormat(descBuf.toString());
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}
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/** {@inheritDoc} */
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public void formatValue(StringBuffer toAppendTo, Object value) {
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if (value == null)
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value = 0.0;
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if (value instanceof Number) {
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Number num = (Number) value;
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double v = num.doubleValue();
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if (v == 0.0)
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value = EXCEL_EPOCH_DATE;
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else
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value = new Date((long) (EXCEL_EPOCH_TIME + v));
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}
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AttributedCharacterIterator it = dateFmt.formatToCharacterIterator(
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value);
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boolean doneAm = false;
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boolean doneMillis = false;
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it.first();
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for (char ch = it.first();
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ch != CharacterIterator.DONE;
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ch = it.next()) {
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if (it.getAttribute(DateFormat.Field.MILLISECOND) != null) {
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if (!doneMillis) {
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Date dateObj = (Date) value;
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int pos = toAppendTo.length();
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Formatter formatter = new Formatter(toAppendTo);
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long msecs = dateObj.getTime() % 1000;
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formatter.format(LOCALE, sFmt, msecs / 1000.0);
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toAppendTo.delete(pos, pos + 2);
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doneMillis = true;
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}
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} else if (it.getAttribute(DateFormat.Field.AM_PM) != null) {
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if (!doneAm) {
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if (showAmPm) {
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if (amPmUpper) {
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toAppendTo.append(Character.toUpperCase(ch));
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if (showM)
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toAppendTo.append('M');
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} else {
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toAppendTo.append(Character.toLowerCase(ch));
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if (showM)
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toAppendTo.append('m');
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}
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}
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doneAm = true;
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}
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} else {
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toAppendTo.append(ch);
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}
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}
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}
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/**
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* {@inheritDoc}
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* <p/>
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* For a date, this is <tt>"mm/d/y"</tt>.
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*/
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public void simpleValue(StringBuffer toAppendTo, Object value) {
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SIMPLE_DATE.formatValue(toAppendTo, value);
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}
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} |