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/*
* $Id: PdfDate.java,v 1.23 2002/07/09 11:28:22 blowagie Exp $
* $Name: $
*
* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.util.GregorianCalendar;
/**
* <CODE>PdfDate</CODE> is the PDF date object.
* <P>
* PDF defines a standard date format. The PDF date format closely follows the format
* defined by the international standard ASN.1 (Abstract Syntax Notation One, defined
* in CCITT X.208 or ISO/IEC 8824). A date is a <CODE>PdfString</CODE> of the form:
* <P><BLOCKQUOTE>
* (D: YYYYMMDDHHmmSSOHH'mm')
* </BLOCKQUOTE><P>
* This object is described in the 'Portable Document Format Reference Manual version 1.3'
* section 7.2 (page 183-184)
*
* @see PdfString
* @see java.util.GregorianCalendar
*/
class PdfDate extends PdfString {
// pdftk-0.94; static builds (Windows, gcc 3.3.1) would
// omit this class because of its reference by reflection;
// this treatment ensures that ld will include it
private static Class c1= gnu.java.locale.Calendar.class;
// constructors
/**
* Constructs a <CODE>PdfDate</CODE>-object.
*
* @param d the date that has to be turned into a <CODE>PdfDate</CODE>-object
*/
PdfDate(GregorianCalendar d) {
super();
StringBuffer date = new StringBuffer("D:");
date.append(setLength(d.get(GregorianCalendar.YEAR), 4));
date.append(setLength(d.get(GregorianCalendar.MONTH) + 1, 2));
date.append(setLength(d.get(GregorianCalendar.DATE), 2));
date.append(setLength(d.get(GregorianCalendar.HOUR_OF_DAY), 2));
date.append(setLength(d.get(GregorianCalendar.MINUTE), 2));
date.append(setLength(d.get(GregorianCalendar.SECOND), 2));
int timezone = d.get(GregorianCalendar.ZONE_OFFSET) / (60 * 60 * 1000);
if (timezone == 0) {
date.append("Z");
}
else if (timezone < 0) {
date.append("-");
timezone = -timezone;
}
else {
date.append("+");
}
if (timezone != 0) {
date.append(setLength(timezone, 2)).append("'");
int zone = Math.abs(d.get(GregorianCalendar.ZONE_OFFSET) / (60 * 1000)) - (timezone * 60);
date.append(setLength(zone, 2)).append("'");
}
value = date.toString();
}
/**
* Constructs a <CODE>PdfDate</CODE>-object, representing the current day and time.
*/
PdfDate() {
this(new GregorianCalendar());
}
/**
* Adds a number of leading zeros to a given <CODE>String</CODE> in order to get a <CODE>String</CODE>
* of a certain length.
*
* @param i a given number
* @param length the length of the resulting <CODE>String</CODE>
* @return the resulting <CODE>String</CODE>
*/
private String setLength(int i, int length) { // 1.3-1.4 problem fixed by Finn Bock
StringBuffer tmp = new StringBuffer();
tmp.append(i);
while (tmp.length() < length) {
tmp.insert(0, "0");
}
tmp.setLength(length);
return tmp.toString();
}
}
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