[jbpm-issues] [JBoss JIRA] Commented: (JBPM-1776) org.jbpm.calendar.BusinessCalendar.add(Date, Duration) delivers unexpected results when business amounts are subtracted

org.jbpm.calendar.BusinessCalendar.add(Date, Duration) delivers unexpected results when business amounts are subtracted ----------------------------------------------------------------------------------------------------------------------- Key: JBPM-1776 URL: https://jira.jboss.org/jira/browse/JBPM-1776 Project: JBoss jBPM Issue Type: Bug Security Level: Public(Everyone can see) Components: API Affects Versions: jBPM 3.2.3 Environment: java.version 1.5.0_13 java.vm.version 1.5.0_13-b05 os.name Windows XP os.version 5.1 Manifest-Version: 1.0 Ant-Version: Apache Ant 1.7.0 Created-By: 1.7.0-b21 (Sun Microsystems Inc.) Implementation-Title: jBPM Core Library Implementation-Version: 3.2.3 (date:18-Jun-2008 00:51) Implementation-URL: http://www.jboss.org/ Implementation-Vendor: JBoss Inc. Implementation-Vendor-Id: http://www.jboss.org/ Reporter: Jürgen Lampe When subtracting business time amounts from a date, the result is after the date and not - as one would expect - before this date. Examples: Sat Nov 01 00:00:00 CET 2008 + 2 business days -> Tue Nov 04 17:00:00 CET 2008 - OK Sat Nov 01 00:00:00 CET 2008 - 2 business days -> Sun Nov 02 18:00:00 CET 2008 - unexpected Sat Nov 01 00:00:00 CET 2008 + 2 business hours -> Mon Nov 03 11:00:00 CET 2008 - OK Sat Nov 01 00:00:00 CET 2008 -2 business hours -> Mon Nov 03 07:00:00 CET 2008 - unexpected Data was created by use of small test program: Date date=new SimpleDateFormat("dd.MM.yyyy").parse("01.11.2008"); String[] durStrs= {"+ 2 business days", "- 2 business days", "+ 2 business hours", "-2 business hours"}; BusinessCalendar calendar= new BusinessCalendar(); for (String durStr: durStrs) { Duration duration= new Duration(durStr); Date d= calendar.add(date, duration); System.out.println(" "+date+" "+durStr+" -> "+d); }