recurrencerule.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

        while (nextStartTime < fromTime) {
            // if (Debug.verboseOn()) Debug.logVerbose("[RecurrenceInfo.getNextFreq] : Updating time - " + getFrequency(), module);
            switch (getFrequency()) {
            case SECONDLY:
                cal.add(Calendar.SECOND, getIntervalInt());
                break;

            case MINUTELY:
                cal.add(Calendar.MINUTE, getIntervalInt());
                break;

            case HOURLY:
                cal.add(Calendar.HOUR, getIntervalInt());
                break;

            case DAILY:
                cal.add(Calendar.DAY_OF_MONTH, getIntervalInt());
                break;

            case WEEKLY:
                cal.add(Calendar.WEEK_OF_YEAR, getIntervalInt());
                break;

            case MONTHLY:
                cal.add(Calendar.MONTH, getIntervalInt());
                break;

            case YEARLY:
                cal.add(Calendar.YEAR, getIntervalInt());
                break;

            default:
                return null; // should never happen
            }
            nextStartTime = cal.getTime().getTime();
        }
        return new Date(nextStartTime);
    }

    // Checks to see if a date is valid by the byXXX rules
    private boolean validByRule(Date date) {
        // Build a Calendar object
        Calendar cal = Calendar.getInstance();

        cal.setTime(date);

        // Test each byXXX rule.
        if (bySecondList != null && bySecondList.size() > 0) {
            if (!bySecondList.contains(new Integer(cal.get(Calendar.SECOND))))
                return false;
        }
        if (byMinuteList != null && byMinuteList.size() > 0) {
            if (!byMinuteList.contains(new Integer(cal.get(Calendar.MINUTE))))
                return false;
        }
        if (byHourList != null && byHourList.size() > 0) {
            if (!byHourList.contains(new Integer(cal.get(Calendar.HOUR))))
                return false;
        }
        if (byDayList != null && byDayList.size() > 0) {
            Iterator iter = byDayList.iterator();
            boolean foundDay = false;

            while (iter.hasNext() && !foundDay) {
                String dayRule = (String) iter.next();
                String dayString = getDailyString(dayRule);

                if (Calendar.DAY_OF_WEEK == getCalendarDay(dayString)) {
                    if ((hasNumber(dayRule)) && (getFrequency() == MONTHLY || getFrequency() == YEARLY)) {
                        int modifier = getDailyNumber(dayRule);

                        if (modifier == 0)
                            foundDay = true;

                        if (getFrequency() == MONTHLY) {
                            // figure if we are the nth xDAY if this month
                            int currentPos = cal.get(Calendar.WEEK_OF_MONTH);
                            int dayPosCalc = cal.get(Calendar.DAY_OF_MONTH) - ((currentPos - 1) * 7);

                            if (dayPosCalc < 1)
                                currentPos--;
                            if (modifier > 0) {
                                if (currentPos == modifier) {
                                    foundDay = true;
                                }
                            } else if (modifier < 0) {
                                int maxDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
                                int firstDay = dayPosCalc > 0 ? dayPosCalc : dayPosCalc + 7;
                                int totalDay = ((maxDay - firstDay) / 7) + 1;
                                int thisDiff = (currentPos - totalDay) - 1;

                                if (thisDiff == modifier) {
                                    foundDay = true;
                                }
                            }
                        } else if (getFrequency() == YEARLY) {
                            // figure if we are the nth xDAY if this year
                            int currentPos = cal.get(Calendar.WEEK_OF_YEAR);
                            int dayPosCalc = cal.get(Calendar.DAY_OF_YEAR) - ((currentPos - 1) * 7);

                            if (dayPosCalc < 1) {
                                currentPos--;
                            }
                            if (modifier > 0) {
                                if (currentPos == modifier) {
                                    foundDay = true;
                                }
                            } else if (modifier < 0) {
                                int maxDay = cal.getActualMaximum(Calendar.DAY_OF_YEAR);
                                int firstDay = dayPosCalc > 0 ? dayPosCalc : dayPosCalc + 7;
                                int totalDay = ((maxDay - firstDay) / 7) + 1;
                                int thisDiff = (currentPos - totalDay) - 1;

                                if (thisDiff == modifier) {
                                    foundDay = true;
                                }
                            }
                        }
                    } else {
                        // we are a DOW only rule
                        foundDay = true;
                    }
                }
            }
            if (!foundDay) {
                return false;
            }
        }
        if (byMonthDayList != null && byMonthDayList.size() > 0) {
            Iterator iter = byMonthDayList.iterator();
            boolean foundDay = false;

            while (iter.hasNext() && !foundDay) {
                int day = 0;
                String dayStr = (String) iter.next();

                try {
                    day = Integer.parseInt(dayStr);
                } catch (NumberFormatException nfe) {
                    Debug.logError(nfe, "Error parsing day string " + dayStr + ": " + nfe.toString(), module);
                }
                int maxDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
                int currentDay = cal.get(Calendar.DAY_OF_MONTH);

                if (day > 0 && day == currentDay) {
                    foundDay = true;
                }
                if (day < 0 && day == ((currentDay - maxDay) - 1)) {
                    foundDay = true;
                }
            }
            if (!foundDay) {
                return false;
            }
        }
        if (byYearDayList != null && byYearDayList.size() > 0) {
            Iterator iter = byYearDayList.iterator();
            boolean foundDay = false;

            while (iter.hasNext() && !foundDay) {
                int day = 0;
                String dayStr = (String) iter.next();

                try {
                    day = Integer.parseInt(dayStr);
                } catch (NumberFormatException nfe) {
                    Debug.logError(nfe, "Error parsing day string " + dayStr + ": " + nfe.toString(), module);
                }
                int maxDay = cal.getActualMaximum(Calendar.DAY_OF_YEAR);
                int currentDay = cal.get(Calendar.DAY_OF_YEAR);

                if (day > 0 && day == currentDay)
                    foundDay = true;
                if (day < 0 && day == ((currentDay - maxDay) - 1))
                    foundDay = true;
            }
            if (!foundDay)
                return false;
        }
        if (byWeekNoList != null && byWeekNoList.size() > 0) {
            Iterator iter = byWeekNoList.iterator();
            boolean foundWeek = false;

            while (iter.hasNext() && !foundWeek) {
                int week = 0;
                String weekStr = (String) iter.next();

                try {
                    week = Integer.parseInt(weekStr);
                } catch (NumberFormatException nfe) {
                    Debug.logError(nfe, "Error parsing week string " + weekStr + ": " + nfe.toString(), module);
                }
                int maxWeek = cal.getActualMaximum(Calendar.WEEK_OF_YEAR);
                int currentWeek = cal.get(Calendar.WEEK_OF_YEAR);

                if (week > 0 && week == currentWeek)
                    foundWeek = true;
                if (week < 0 && week == ((currentWeek - maxWeek) - 1))
                    foundWeek = true;
            }
            if (!foundWeek)
                return false;
        }
        if (byMonthList != null && byMonthList.size() > 0) {
            Iterator iter = byMonthList.iterator();
            boolean foundMonth = false;

            while (iter.hasNext() && !foundMonth) {
                int month = 0;
                String monthStr = (String) iter.next();

                try {
                    month = Integer.parseInt(monthStr);
                } catch (NumberFormatException nfe) {
                    Debug.logError(nfe, "Error parsing month string " + monthStr + ": " + nfe.toString(), module);
                }
                if (month == cal.get(Calendar.MONTH)) {
                    foundMonth = true;
                }
            }
            if (!foundMonth)
                return false;
        }

        return true;
    }

    // Tests a string for the contents of a number at the beginning
    private boolean hasNumber(String str) {
        String list[] = {"+", "-", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0"};
        List numberList = Arrays.asList(list);
        String firstChar = str.substring(0, 0);

        if (numberList.contains(firstChar))
            return true;
        return false;
    }

    // Gets the numeric value of the number at the beginning of the string
    private int getDailyNumber(String str) {
        int number = 0;
        StringBuffer numberBuf = new StringBuffer();

        for (int i = 0; i < str.length(); i++) {
            String thisChar = str.substring(i, i);

            if (hasNumber(thisChar))
                numberBuf.append(thisChar);
        }
        String numberStr = numberBuf.toString();

        if (numberStr.length() > 0 && (numberStr.length() > 1 ||
                (numberStr.charAt(0) != '+' && numberStr.charAt(0) != '-'))) {
            try {
                number = Integer.parseInt(numberStr);
            } catch (NumberFormatException nfe) {
                Debug.logError(nfe, "Error parsing daily number string " + numberStr + ": " + nfe.toString(), module);
            }
        }
        return number;
    }

    // Gets the string part of the combined number+string
    private String getDailyString(String str) {
        StringBuffer sBuf = new StringBuffer();

        for (int i = 0; i < str.length(); i++) {
            String thisChar = str.substring(i, i);

            if (!hasNumber(thisChar)) {
                sBuf.append(thisChar);
            }
        }
        return sBuf.toString();
    }

    // Returns the Calendar day of the rule day string
    private int getCalendarDay(String day) {
        if (day.equalsIgnoreCase("MO"))
            return Calendar.MONDAY;
        if (day.equalsIgnoreCase("TU"))
            return Calendar.TUESDAY;
        if (day.equalsIgnoreCase("WE"))
            return Calendar.WEDNESDAY;
        if (day.equalsIgnoreCase("TH"))
            return Calendar.THURSDAY;
        if (day.equalsIgnoreCase("FR"))
            return Calendar.FRIDAY;
        if (day.equalsIgnoreCase("SA"))
            return Calendar.SATURDAY;
        if (day.equalsIgnoreCase("SU"))
            return Calendar.SUNDAY;
        return 0;
    }

    public String primaryKey() {
        return rule.getString("recurrenceRuleId");
    }

    public static RecurrenceRule makeRule(GenericDelegator delegator, int frequency, int interval, int count)
            throws RecurrenceRuleException {
        return makeRule(delegator, frequency, interval, count, 0);
    }

    public static RecurrenceRule makeRule(GenericDelegator delegator, int frequency, int interval, long endTime)
            throws RecurrenceRuleException {
        return makeRule(delegator, frequency, interval, -1, endTime);
    }
        
    public static RecurrenceRule makeRule(GenericDelegator delegator, int frequency, int interval, int count, long endTime)
            throws RecurrenceRuleException {
        String freq[] = {"", "SECONDLY", "MINUTELY", "HOURLY", "DAILY", "WEEKLY", "MONTHLY", "YEARLY"};

        if (frequency < 1 || frequency > 7)
            throw new RecurrenceRuleException("Invalid frequency");
        if (interval < 0)
            throw new RecurrenceRuleException("Invalid interval");
       
        String freqStr = freq[frequency];

        try {
            String ruleId = delegator.getNextSeqId("RecurrenceRule").toString();
            GenericValue value = delegator.makeValue("RecurrenceRule", UtilMisc.toMap("recurrenceRuleId", ruleId));

            value.set("frequency", freqStr);
            value.set("intervalNumber", new Long(interval));
            value.set("countNumber", new Long(count));
            if (endTime > 0) {
                value.set("untilDateTime", new java.sql.Timestamp(endTime));
            }
            delegator.create(value);
            RecurrenceRule newRule = new RecurrenceRule(value);

            return newRule;
        } catch (GenericEntityException ee) {
            throw new RecurrenceRuleException(ee.getMessage(), ee);
        } catch (RecurrenceRuleException re) {
            throw re;
        }
    }
}