From 6025b6016517c6d898d8957d1d7e03ba71431912 Mon Sep 17 00:00:00 2001 From: tknall Date: Fri, 1 Dec 2006 12:20:24 +0000 Subject: Initial import of release 2.2. git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c --- src/main/java/org/pdfbox/util/DateConverter.java | 281 +++++++++++++++++++++++ 1 file changed, 281 insertions(+) create mode 100644 src/main/java/org/pdfbox/util/DateConverter.java (limited to 'src/main/java/org/pdfbox/util/DateConverter.java') diff --git a/src/main/java/org/pdfbox/util/DateConverter.java b/src/main/java/org/pdfbox/util/DateConverter.java new file mode 100644 index 0000000..43d3566 --- /dev/null +++ b/src/main/java/org/pdfbox/util/DateConverter.java @@ -0,0 +1,281 @@ +/** + * Copyright (c) 2003-2005, www.pdfbox.org + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of pdfbox; nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * http://www.pdfbox.org + * + */ +package org.pdfbox.util; + +import java.text.ParseException; +import java.text.SimpleDateFormat; + +import java.io.IOException; + +import java.util.Calendar; +import java.util.Date; +import java.util.GregorianCalendar; +import java.util.SimpleTimeZone; +import java.util.TimeZone; + +import org.pdfbox.cos.COSString; + +/** + * This class is used to convert dates to strings and back using the PDF + * date standards. Date are described in PDFReference1.4 section 3.8.2 + * + * @author Ben Litchfield (ben@benlitchfield.com) + * @version $Revision: 1.9 $ + */ +public class DateConverter +{ + private static final SimpleDateFormat PDF_DATE_FORMAT = new SimpleDateFormat( "yyyyMMddHHmmss" ); + + //The Date format is supposed to be the PDF_DATE_FORMAT, but not all PDF documents + //will use that date, so I have added a couple other potential formats + //to try if the original one does not work. + private static final SimpleDateFormat[] POTENTIAL_FORMATS = new SimpleDateFormat[] { + new SimpleDateFormat("EEEE, dd MMM yyyy hh:mm:ss a"), + new SimpleDateFormat("EEEE, MMM dd, yyyy hh:mm:ss a")}; + + private static final SimpleDateFormat ISO_8601_DATE_FORMAT = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss" ); + + private DateConverter() + { + //utility class should not be constructed. + } + + /** + * This will convert the calendar to a string. + * + * @param date The date to convert to a string. + * + * @return The date as a String to be used in a PDF document. + */ + public static String toString( Calendar date ) + { + String retval = null; + if( date != null ) + { + StringBuffer buffer = new StringBuffer(); + TimeZone zone = date.getTimeZone(); + long offsetInMinutes = zone.getOffset( date.getTimeInMillis() )/1000/60; + long hours = Math.abs( offsetInMinutes/60 ); + long minutes = Math.abs( offsetInMinutes%60 ); + buffer.append( "D:" ); + buffer.append( PDF_DATE_FORMAT.format( date.getTime() ) ); + if( offsetInMinutes == 0 ) + { + buffer.append( "Z" ); + } + else if( offsetInMinutes < 0 ) + { + buffer.append( "-" ); + } + else + { + buffer.append( "+" ); + } + if( hours < 10 ) + { + buffer.append( "0" ); + } + buffer.append( hours ); + buffer.append( "'" ); + if( minutes < 10 ) + { + buffer.append( "0" ); + } + buffer.append( minutes ); + buffer.append( "'" ); + retval = buffer.toString(); + + } + return retval; + } + + /** + * This will convert a string to a calendar. + * + * @param date The string representation of the calendar. + * + * @return The calendar that this string represents. + * + * @throws IOException If the date string is not in the correct format. + */ + public static Calendar toCalendar( COSString date ) throws IOException + { + Calendar retval = null; + if( date != null ) + { + retval = toCalendar( date.getString() ); + } + + return retval; + } + + /** + * This will convert a string to a calendar. + * + * @param date The string representation of the calendar. + * + * @return The calendar that this string represents. + * + * @throws IOException If the date string is not in the correct format. + */ + public static Calendar toCalendar( String date ) throws IOException + { + Calendar retval = null; + if( date != null ) + { + //these are the default values + int year = 0; + int month = 1; + int day = 1; + int hour = 0; + int minute = 0; + int second = 0; + //first string off the prefix if it exists + try + { + SimpleTimeZone zone = null; + if( date.startsWith( "D:" ) ) + { + date = date.substring( 2, date.length() ); + } + if( date.length() < 4 ) + { + throw new IOException( "Error: Invalid date format '" + date + "'" ); + } + year = Integer.parseInt( date.substring( 0, 4 ) ); + if( date.length() >= 6 ) + { + month = Integer.parseInt( date.substring( 4, 6 ) ); + } + if( date.length() >= 8 ) + { + day = Integer.parseInt( date.substring( 6, 8 ) ); + } + if( date.length() >= 10 ) + { + hour = Integer.parseInt( date.substring( 8, 10 ) ); + } + if( date.length() >= 12 ) + { + minute = Integer.parseInt( date.substring( 10, 12 ) ); + } + if( date.length() >= 14 ) + { + second = Integer.parseInt( date.substring( 12, 14 ) ); + } + retval = new GregorianCalendar( year, month-1, day, hour, minute, second ); + if( date.length() >= 15 ) + { + char sign = date.charAt( 14 ); + if( sign == 'Z' ) + { + zone = new SimpleTimeZone(0,"Unknown"); + } + else + { + int hours = 0; + int minutes = 0; + if( date.length() >= 17 ) + { + hours = Integer.parseInt( date.substring( 15, 17 ) ); + } + if( date.length() > 20 ) + { + minutes = Integer.parseInt( date.substring( 18, 20 ) ); + } + zone = new SimpleTimeZone( hours*60*60*1000 + minutes*60*1000, "Unknown" ); + } + retval.setTimeZone( zone ); + } + } + catch( NumberFormatException e ) + { + for( int i=0; retval == null && i