org.apache.ws.commons.util.XsDateTimeFormat Maven / Gradle / Ivy
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This is a small collection of utility classes, that allow high performance XML processing based on SAX. Basically, it is assumed, that you are using an JAXP 1.1 compliant XML parser and nothing else. In particular, no dependency on the javax.xml.transform package is introduced.
/*
* Copyright 2003, 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.apache.ws.commons.util;
import java.text.FieldPosition;
import java.text.Format;
import java.text.ParsePosition;
import java.util.Calendar;
import java.util.TimeZone;
/** An instance of {@link java.text.Format}, which may be used
* to parse and format xs:dateTime values.
*/
public class XsDateTimeFormat extends Format {
private static final long serialVersionUID = 3258131340871479609L;
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;
}
}