/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.geotools.xml.impl;
import java.text.FieldPosition;
import java.text.Format;
import java.text.ParsePosition;
import java.util.Calendar;
import java.util.TimeZone;
/** <p>An instance of {@link java.text.Format}, which may be used
* to parse and format <code>xs:dateTime</code> values.</p>
*
* @author <a href="mailto:joe@ispsoft.de">Jochen Wiedmann</a>
*
*
* @source $URL$
*/
public class XsDateTimeFormat extends Format {
final boolean parseDate;
final boolean parseTime;
XsDateTimeFormat(boolean pParseDate, boolean pParseTime) {
parseDate = pParseDate;
parseTime = pParseTime;
}
/** Creates a new instance.
*/
public XsDateTimeFormat() {
this(true, true);
}
private int parseInt(String pString, int pOffset, StringBuffer pDigits) {
int length = pString.length();
pDigits.setLength(0);
while (pOffset < length) {
char c = pString.charAt(pOffset);
if (Character.isDigit(c)) {
pDigits.append(c);
++pOffset;
} else {
break;
}
}
return pOffset;
}
public Object parseObject(String pString, ParsePosition pParsePosition) {
if (pString == null) {
throw new NullPointerException("The String argument must not be null.");
}
if (pParsePosition == null) {
throw new NullPointerException("The ParsePosition argument must not be null.");
}
int offset = pParsePosition.getIndex();
int length = pString.length();
boolean isMinus = false;
StringBuffer digits = new StringBuffer();
int year, month, mday;
if (parseDate) {
// Sign
if (offset < length) {
char c = pString.charAt(offset);
if (c == '+') {
++offset;
} else if (c == '-') {
++offset;
isMinus = true;
}
}
offset = parseInt(pString, offset, digits);
if (digits.length() < 4) {
pParsePosition.setErrorIndex(offset);
return null;
}
year = Integer.parseInt(digits.toString());
if (offset < length && pString.charAt(offset) == '-') {
++offset;
} else {
pParsePosition.setErrorIndex(offset);
return null;
}
offset = parseInt(pString, offset, digits);
if (digits.length() != 2) {
pParsePosition.setErrorIndex(offset);
return null;
}
month = Integer.parseInt(digits.toString());
if (offset < length && pString.charAt(offset) == '-') {
++offset;
} else {
pParsePosition.setErrorIndex(offset);
return null;
}
offset = parseInt(pString, offset, digits);
if (digits.length() != 2) {
pParsePosition.setErrorIndex(offset);
return null;
}
mday = Integer.parseInt(digits.toString());
if (parseTime) {
if (offset < length && pString.charAt(offset) == 'T') {
++offset;
} else {
pParsePosition.setErrorIndex(offset);
return null;
}
}
} else {
year = month = mday = 0;
}
int hour, minute, second, millis;
if (parseTime) {
offset = parseInt(pString, offset, digits);
if (digits.length() != 2) {
pParsePosition.setErrorIndex(offset);
return null;
}
hour = Integer.parseInt(digits.toString());
if (offset < length && pString.charAt(offset) == ':') {
++offset;
} else {
pParsePosition.setErrorIndex(offset);
return null;
}
offset = parseInt(pString, offset, digits);
if (digits.length() != 2) {
pParsePosition.setErrorIndex(offset);
return null;
}
minute = Integer.parseInt(digits.toString());
if (offset < length && pString.charAt(offset) == ':') {
++offset;
} else {
pParsePosition.setErrorIndex(offset);
return null;
}
offset = parseInt(pString, offset, digits);
if (digits.length() != 2) {
pParsePosition.setErrorIndex(offset);
return null;
}
second = Integer.parseInt(digits.toString());
if (offset < length && pString.charAt(offset) == '.') {
++offset;
offset = parseInt(pString, offset, digits);
if (digits.length() > 0) {
millis = Integer.parseInt(digits.toString());
if (millis > 999) {
pParsePosition.setErrorIndex(offset);
return null;
}
for (int i = digits.length(); i < 3; i++) {
millis *= 10;
}
} else {
millis = 0;
}
} else {
millis = 0;
}
} else {
hour = minute = second = millis = 0;
}
digits.setLength(0);
digits.append("GMT");
if (offset < length) {
char c = pString.charAt(offset);
if (c == 'Z') {
// Ignore UTC, it is the default
++offset;
} else if (c == '+' || c == '-') {
digits.append(c);
++offset;
for (int i = 0; i < 5; i++) {
if (offset >= length) {
pParsePosition.setErrorIndex(offset);
return null;
}
c = pString.charAt(offset);
if ((i != 2 && Character.isDigit(c)) ||
(i == 2 && c == ':')) {
digits.append(c);
} else {
pParsePosition.setErrorIndex(offset);
return null;
}
++offset;
}
}
}
Calendar cal = Calendar.getInstance(TimeZone.getTimeZone(digits.toString()));
cal.set(isMinus ? -year : year, parseDate ? month-1 : month, mday, hour, minute, second);
cal.set(Calendar.MILLISECOND, millis);
pParsePosition.setIndex(offset);
return cal;
}
private void append(StringBuffer pBuffer, int pNum, int pMinLen) {
String s = Integer.toString(pNum);
for (int i = s.length(); i < pMinLen; i++) {
pBuffer.append('0');
}
pBuffer.append(s);
}
public StringBuffer format(Object pCalendar, StringBuffer pBuffer, FieldPosition pPos) {
if (pCalendar == null) {
throw new NullPointerException("The Calendar argument must not be null.");
}
if (pBuffer == null) {
throw new NullPointerException("The StringBuffer argument must not be null.");
}
if (pPos == null) {
throw new NullPointerException("The FieldPosition argument must not be null.");
}
Calendar cal = (Calendar) pCalendar;
if (parseDate) {
int year = cal.get(Calendar.YEAR);
if (year < 0) {
pBuffer.append('-');
year = -year;
}
append(pBuffer, year, 4);
pBuffer.append('-');
append(pBuffer, cal.get(Calendar.MONTH)+1, 2);
pBuffer.append('-');
append(pBuffer, cal.get(Calendar.DAY_OF_MONTH), 2);
if (parseTime) {
pBuffer.append('T');
}
}
if (parseTime) {
append(pBuffer, cal.get(Calendar.HOUR_OF_DAY), 2);
pBuffer.append(':');
append(pBuffer, cal.get(Calendar.MINUTE), 2);
pBuffer.append(':');
append(pBuffer, cal.get(Calendar.SECOND), 2);
int millis = cal.get(Calendar.MILLISECOND);
if (millis > 0) {
pBuffer.append('.');
append(pBuffer, millis, 3);
}
}
TimeZone tz = cal.getTimeZone();
// JDK 1.4: int offset = tz.getOffset(cal.getTimeInMillis());
int offset = cal.get(Calendar.ZONE_OFFSET);
if (tz.inDaylightTime(cal.getTime())) {
offset += cal.get(Calendar.DST_OFFSET);
}
if (offset == 0) {
pBuffer.append('Z');
} else {
if (offset < 0) {
pBuffer.append('-');
offset = -offset;
} else {
pBuffer.append('+');
}
int minutes = offset / (60*1000);
int hours = minutes / 60;
minutes -= hours * 60;
append(pBuffer, hours, 2);
pBuffer.append(':');
append(pBuffer, minutes, 2);
}
return pBuffer;
}
}