/*
* Copyright (C) 2006 The Android Open Source Project
*
* 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 com.android.calendarcommon;
import android.text.TextUtils;
import android.text.format.Time;
import android.util.Log;
import android.util.TimeFormatException;
import java.util.Calendar;
import java.util.HashMap;
/**
* Event recurrence utility functions.
*/
public class EventRecurrence {
private static String TAG = "EventRecur";
public static final int SECONDLY = 1;
public static final int MINUTELY = 2;
public static final int HOURLY = 3;
public static final int DAILY = 4;
public static final int WEEKLY = 5;
public static final int MONTHLY = 6;
public static final int YEARLY = 7;
public static final int SU = 0x00010000;
public static final int MO = 0x00020000;
public static final int TU = 0x00040000;
public static final int WE = 0x00080000;
public static final int TH = 0x00100000;
public static final int FR = 0x00200000;
public static final int SA = 0x00400000;
public Time startDate; // set by setStartDate(), not parse()
public int freq; // SECONDLY, MINUTELY, etc.
public String until;
public int count;
public int interval;
public int wkst; // SU, MO, TU, etc.
/* lists with zero entries may be null references */
public int[] bysecond;
public int bysecondCount;
public int[] byminute;
public int byminuteCount;
public int[] byhour;
public int byhourCount;
public int[] byday;
public int[] bydayNum;
public int bydayCount;
public int[] bymonthday;
public int bymonthdayCount;
public int[] byyearday;
public int byyeardayCount;
public int[] byweekno;
public int byweeknoCount;
public int[] bymonth;
public int bymonthCount;
public int[] bysetpos;
public int bysetposCount;
/** maps a part string to a parser object */
private static HashMap<String,PartParser> sParsePartMap;
static {
sParsePartMap = new HashMap<String,PartParser>();
sParsePartMap.put("FREQ", new ParseFreq());
sParsePartMap.put("UNTIL", new ParseUntil());
sParsePartMap.put("COUNT", new ParseCount());
sParsePartMap.put("INTERVAL", new ParseInterval());
sParsePartMap.put("BYSECOND", new ParseBySecond());
sParsePartMap.put("BYMINUTE", new ParseByMinute());
sParsePartMap.put("BYHOUR", new ParseByHour());
sParsePartMap.put("BYDAY", new ParseByDay());
sParsePartMap.put("BYMONTHDAY", new ParseByMonthDay());
sParsePartMap.put("BYYEARDAY", new ParseByYearDay());
sParsePartMap.put("BYWEEKNO", new ParseByWeekNo());
sParsePartMap.put("BYMONTH", new ParseByMonth());
sParsePartMap.put("BYSETPOS", new ParseBySetPos());
sParsePartMap.put("WKST", new ParseWkst());
}
/* values for bit vector that keeps track of what we have already seen */
private static final int PARSED_FREQ = 1 << 0;
private static final int PARSED_UNTIL = 1 << 1;
private static final int PARSED_COUNT = 1 << 2;
private static final int PARSED_INTERVAL = 1 << 3;
private static final int PARSED_BYSECOND = 1 << 4;
private static final int PARSED_BYMINUTE = 1 << 5;
private static final int PARSED_BYHOUR = 1 << 6;
private static final int PARSED_BYDAY = 1 << 7;
private static final int PARSED_BYMONTHDAY = 1 << 8;
private static final int PARSED_BYYEARDAY = 1 << 9;
private static final int PARSED_BYWEEKNO = 1 << 10;
private static final int PARSED_BYMONTH = 1 << 11;
private static final int PARSED_BYSETPOS = 1 << 12;
private static final int PARSED_WKST = 1 << 13;
/** maps a FREQ value to an integer constant */
private static final HashMap<String,Integer> sParseFreqMap = new HashMap<String,Integer>();
static {
sParseFreqMap.put("SECONDLY", SECONDLY);
sParseFreqMap.put("MINUTELY", MINUTELY);
sParseFreqMap.put("HOURLY", HOURLY);
sParseFreqMap.put("DAILY", DAILY);
sParseFreqMap.put("WEEKLY", WEEKLY);
sParseFreqMap.put("MONTHLY", MONTHLY);
sParseFreqMap.put("YEARLY", YEARLY);
}
/** maps a two-character weekday string to an integer constant */
private static final HashMap<String,Integer> sParseWeekdayMap = new HashMap<String,Integer>();
static {
sParseWeekdayMap.put("SU", SU);
sParseWeekdayMap.put("MO", MO);
sParseWeekdayMap.put("TU", TU);
sParseWeekdayMap.put("WE", WE);
sParseWeekdayMap.put("TH", TH);
sParseWeekdayMap.put("FR", FR);
sParseWeekdayMap.put("SA", SA);
}
/** If set, allow lower-case recurrence rule strings. Minor performance impact. */
private static final boolean ALLOW_LOWER_CASE = true;
/** If set, validate the value of UNTIL parts. Minor performance impact. */
private static final boolean VALIDATE_UNTIL = false;
/** If set, require that only one of {UNTIL,COUNT} is present. Breaks compat w/ old parser. */
private static final boolean ONLY_ONE_UNTIL_COUNT = false;
/**
* Thrown when a recurrence string provided can not be parsed according
* to RFC2445.
*/
public static class InvalidFormatException extends RuntimeException {
InvalidFormatException(String s) {
super(s);
}
}
public void setStartDate(Time date) {
startDate = date;
}
/**
* Converts one of the Calendar.SUNDAY constants to the SU, MO, etc.
* constants. btw, I think we should switch to those here too, to
* get rid of this function, if possible.
*/
public static int calendarDay2Day(int day)
{
switch (day)
{
case Calendar.SUNDAY:
return SU;
case Calendar.MONDAY:
return MO;
case Calendar.TUESDAY:
return TU;
case Calendar.WEDNESDAY:
return WE;
case Calendar.THURSDAY:
return TH;
case Calendar.FRIDAY:
return FR;
case Calendar.SATURDAY:
return SA;
default:
throw new RuntimeException("bad day of week: " + day);
}
}
public static int timeDay2Day(int day)
{
switch (day)
{
case Time.SUNDAY:
return SU;
case Time.MONDAY:
return MO;
case Time.TUESDAY:
return TU;
case Time.WEDNESDAY:
return WE;
case Time.THURSDAY:
return TH;
case Time.FRIDAY:
return FR;
case Time.SATURDAY:
return SA;
default:
throw new RuntimeException("bad day of week: " + day);
}
}
public static int day2TimeDay(int day)
{
switch (day)
{
case SU:
return Time.SUNDAY;
case MO:
return Time.MONDAY;
case TU:
return Time.TUESDAY;
case WE:
return Time.WEDNESDAY;
case TH:
return Time.THURSDAY;
case FR:
return Time.FRIDAY;
case SA:
return Time.SATURDAY;
default:
throw new RuntimeException("bad day of week: " + day);
}
}
/**
* Converts one of the SU, MO, etc. constants to the Calendar.SUNDAY
* constants. btw, I think we should switch to those here too, to
* get rid of this function, if possible.
*/
public static int day2CalendarDay(int day)
{
switch (day)
{
case SU:
return Calendar.SUNDAY;
case MO:
return Calendar.MONDAY;
case TU:
return Calendar.TUESDAY;
case WE:
return Calendar.WEDNESDAY;
case TH:
return Calendar.THURSDAY;
case FR:
return Calendar.FRIDAY;
case SA:
return Calendar.SATURDAY;
default:
throw new RuntimeException("bad day of week: " + day);
}
}
/**
* Converts one of the internal day constants (SU, MO, etc.) to the
* two-letter string representing that constant.
*
* @param day one the internal constants SU, MO, etc.
* @return the two-letter string for the day ("SU", "MO", etc.)
*
* @throws IllegalArgumentException Thrown if the day argument is not one of
* the defined day constants.
*/
private static String day2String(int day) {
switch (day) {
case SU:
return "SU";
case MO:
return "MO";
case TU:
return "TU";
case WE:
return "WE";
case TH:
return "TH";
case FR:
return "FR";
case SA:
return "SA";
default:
throw new IllegalArgumentException("bad day argument: " + day);
}
}
private static void appendNumbers(StringBuilder s, String label,
int count, int[] values)
{
if (count > 0) {
s.append(label);
count--;
for (int i=0; i<count; i++) {
s.append(values[i]);
s.append(",");
}
s.append(values[count]);
}
}
private void appendByDay(StringBuilder s, int i)
{
int n = this.bydayNum[i];
if (n != 0) {
s.append(n);
}
String str = day2String(this.byday[i]);
s.append(str);
}
@Override
public String toString()
{
StringBuilder s = new StringBuilder();
s.append("FREQ=");
switch (this.freq)
{
case SECONDLY:
s.append("SECONDLY");
break;
case MINUTELY:
s.append("MINUTELY");
break;
case HOURLY:
s.append("HOURLY");
break;
case DAILY:
s.append("DAILY");
break;
case WEEKLY:
s.append("WEEKLY");
break;
case MONTHLY:
s.append("MONTHLY");
break;
case YEARLY:
s.append("YEARLY");
break;
}
if (!TextUtils.isEmpty(this.until)) {
s.append(";UNTIL=");
s.append(until);
}
if (this.count != 0) {
s.append(";COUNT=");
s.append(this.count);
}
if (this.interval != 0) {
s.append(";INTERVAL=");
s.append(this.interval);
}
if (this.wkst != 0) {
s.append(";WKST=");
s.append(day2String(this.wkst));
}
appendNumbers(s, ";BYSECOND=", this.bysecondCount, this.bysecond);
appendNumbers(s, ";BYMINUTE=", this.byminuteCount, this.byminute);
appendNumbers(s, ";BYSECOND=", this.byhourCount, this.byhour);
// day
int count = this.bydayCount;
if (count > 0) {
s.append(";BYDAY=");
count--;
for (int i=0; i<count; i++) {
appendByDay(s, i);
s.append(",");
}
appendByDay(s, count);
}
appendNumbers(s, ";BYMONTHDAY=", this.bymonthdayCount, this.bymonthday);
appendNumbers(s, ";BYYEARDAY=", this.byyeardayCount, this.byyearday);
appendNumbers(s, ";BYWEEKNO=", this.byweeknoCount, this.byweekno);
appendNumbers(s, ";BYMONTH=", this.bymonthCount, this.bymonth);
appendNumbers(s, ";BYSETPOS=", this.bysetposCount, this.bysetpos);
return s.toString();
}
public boolean repeatsOnEveryWeekDay() {
if (this.freq != WEEKLY) {
return false;
}
int count = this.bydayCount;
if (count != 5) {
return false;
}
for (int i = 0 ; i < count ; i++) {
int day = byday[i];
if (day == SU || day == SA) {
return false;
}
}
return true;
}
/**
* Determines whether this rule specifies a simple monthly rule by weekday, such as
* "FREQ=MONTHLY;BYDAY=3TU" (the 3rd Tuesday of every month).
* <p>
* Negative days, e.g. "FREQ=MONTHLY;BYDAY=-1TU" (the last Tuesday of every month),
* will cause "false" to be returned.
* <p>
* Rules that fire every week, such as "FREQ=MONTHLY;BYDAY=TU" (every Tuesday of every
* month) will cause "false" to be returned. (Note these are usually expressed as
* WEEKLY rules, and hence are uncommon.)
*
* @return true if this rule is of the appropriate form
*/
public boolean repeatsMonthlyOnDayCount() {
if (this.freq != MONTHLY) {
return false;
}
if (bydayCount != 1 || bymonthdayCount != 0) {
return false;
}
if (bydayNum[0] <= 0) {
return false;
}
return true;
}
/**
* Determines whether two integer arrays contain identical elements.
* <p>
* The native implementation over-allocated the arrays (and may have stuff left over from
* a previous run), so we can't just check the arrays -- the separately-maintained count
* field also matters. We assume that a null array will have a count of zero, and that the
* array can hold as many elements as the associated count indicates.
* <p>
* TODO: replace this with Arrays.equals() when the old parser goes away.
*/
private static boolean arraysEqual(int[] array1, int count1, int[] array2, int count2) {
if (count1 != count2) {
return false;
}
for (int i = 0; i < count1; i++) {
if (array1[i] != array2[i])
return false;
}
return true;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof EventRecurrence)) {
return false;
}
EventRecurrence er = (EventRecurrence) obj;
return (startDate == null ?
er.startDate == null : Time.compare(startDate, er.startDate) == 0) &&
freq == er.freq &&
(until == null ? er.until == null : until.equals(er.until)) &&
count == er.count &&
interval == er.interval &&
wkst == er.wkst &&
arraysEqual(bysecond, bysecondCount, er.bysecond, er.bysecondCount) &&
arraysEqual(byminute, byminuteCount, er.byminute, er.byminuteCount) &&
arraysEqual(byhour, byhourCount, er.byhour, er.byhourCount) &&
arraysEqual(byday, bydayCount, er.byday, er.bydayCount) &&
arraysEqual(bydayNum, bydayCount, er.bydayNum, er.bydayCount) &&
arraysEqual(bymonthday, bymonthdayCount, er.bymonthday, er.bymonthdayCount) &&
arraysEqual(byyearday, byyeardayCount, er.byyearday, er.byyeardayCount) &&
arraysEqual(byweekno, byweeknoCount, er.byweekno, er.byweeknoCount) &&
arraysEqual(bymonth, bymonthCount, er.bymonth, er.bymonthCount) &&
arraysEqual(bysetpos, bysetposCount, er.bysetpos, er.bysetposCount);
}
@Override public int hashCode() {
// We overrode equals, so we must override hashCode(). Nobody seems to need this though.
throw new UnsupportedOperationException();
}
/**
* Resets parser-modified fields to their initial state. Does not alter startDate.
* <p>
* The original parser always set all of the "count" fields, "wkst", and "until",
* essentially allowing the same object to be used multiple times by calling parse().
* It's unclear whether this behavior was intentional. For now, be paranoid and
* preserve the existing behavior by resetting the fields.
* <p>
* We don't need to touch the integer arrays; they will either be ignored or
* overwritten. The "startDate" field is not set by the parser, so we ignore it here.
*/
private void resetFields() {
until = null;
freq = count = interval = bysecondCount = byminuteCount = byhourCount =
bydayCount = bymonthdayCount = byyeardayCount = byweeknoCount = bymonthCount =
bysetposCount = 0;
}
/**
* Parses an rfc2445 recurrence rule string into its component pieces. Attempting to parse
* malformed input will result in an EventRecurrence.InvalidFormatException.
*
* @param recur The recurrence rule to parse (in un-folded form).
*/
public void parse(String recur) {
/*
* From RFC 2445 section 4.3.10:
*
* recur = "FREQ"=freq *(
* ; either UNTIL or COUNT may appear in a 'recur',
* ; but UNTIL and COUNT MUST NOT occur in the same 'recur'
*
* ( ";" "UNTIL" "=" enddate ) /
* ( ";" "COUNT" "=" 1*DIGIT ) /
*
* ; the rest of these keywords are optional,
* ; but MUST NOT occur more than once
*
* ( ";" "INTERVAL" "=" 1*DIGIT ) /
* ( ";" "BYSECOND" "=" byseclist ) /
* ( ";" "BYMINUTE" "=" byminlist ) /
* ( ";" "BYHOUR" "=" byhrlist ) /
* ( ";" "BYDAY" "=" bywdaylist ) /
* ( ";" "BYMONTHDAY" "=" bymodaylist ) /
* ( ";" "BYYEARDAY" "=" byyrdaylist ) /
* ( ";" "BYWEEKNO" "=" bywknolist ) /
* ( ";" "BYMONTH" "=" bymolist ) /
* ( ";" "BYSETPOS" "=" bysplist ) /
* ( ";" "WKST" "=" weekday ) /
* ( ";" x-name "=" text )
* )
*
* The rule parts are not ordered in any particular sequence.
*
* Examples:
* FREQ=MONTHLY;INTERVAL=2;COUNT=10;BYDAY=1SU,-1SU
* FREQ=YEARLY;INTERVAL=4;BYMONTH=11;BYDAY=TU;BYMONTHDAY=2,3,4,5,6,7,8
*
* Strategy:
* (1) Split the string at ';' boundaries to get an array of rule "parts".
* (2) For each part, find substrings for left/right sides of '=' (name/value).
* (3) Call a <name>-specific parsing function to parse the <value> into an
* output field.
*
* By keeping track of which names we've seen in a bit vector, we can verify the
* constraints indicated above (FREQ appears first, none of them appear more than once --
* though x-[name] would require special treatment), and we have either UNTIL or COUNT
* but not both.
*
* In general, RFC 2445 property names (e.g. "FREQ") and enumerations ("TU") must
* be handled in a case-insensitive fashion, but case may be significant for other
* properties. We don't have any case-sensitive values in RRULE, except possibly
* for the custom "X-" properties, but we ignore those anyway. Thus, we can trivially
* convert the entire string to upper case and then use simple comparisons.
*
* Differences from previous version:
* - allows lower-case property and enumeration values [optional]
* - enforces that FREQ appears first
* - enforces that only one of UNTIL and COUNT may be specified
* - allows (but ignores) X-* parts
* - improved validation on various values (e.g. UNTIL timestamps)
* - error messages are more specific
*
* TODO: enforce additional constraints listed in RFC 5545, notably the "N/A" entries
* in section 3.3.10. For example, if FREQ=WEEKLY, we should reject a rule that
* includes a BYMONTHDAY part.
*/
/* TODO: replace with "if (freq != 0) throw" if nothing requires this */
resetFields();
int parseFlags = 0;
String[] parts;
if (ALLOW_LOWER_CASE) {
parts = recur.toUpperCase().split(";");
} else {
parts = recur.split(";");
}
for (String part : parts) {
int equalIndex = part.indexOf('=');
if (equalIndex <= 0) {
/* no '=' or no LHS */
throw new InvalidFormatException("Missing LHS in " + part);
}
String lhs = part.substring(0, equalIndex);
String rhs = part.substring(equalIndex + 1);
if (rhs.length() == 0) {
throw new InvalidFormatException("Missing RHS in " + part);
}
/*
* In lieu of a "switch" statement that allows string arguments, we use a
* map from strings to parsing functions.
*/
PartParser parser = sParsePartMap.get(lhs);
if (parser == null) {
if (lhs.startsWith("X-")) {
//Log.d(TAG, "Ignoring custom part " + lhs);
continue;
}
throw new InvalidFormatException("Couldn't find parser for " + lhs);
} else {
int flag = parser.parsePart(rhs, this);
if ((parseFlags & flag) != 0) {
throw new InvalidFormatException("Part " + lhs + " was specified twice");
}
parseFlags |= flag;
}
}
// If not specified, week starts on Monday.
if ((parseFlags & PARSED_WKST) == 0) {
wkst = MO;
}
// FREQ is mandatory.
if ((parseFlags & PARSED_FREQ) == 0) {
throw new InvalidFormatException("Must specify a FREQ value");
}
// Can't have both UNTIL and COUNT.
if ((parseFlags & (PARSED_UNTIL | PARSED_COUNT)) == (PARSED_UNTIL | PARSED_COUNT)) {
if (ONLY_ONE_UNTIL_COUNT) {
throw new InvalidFormatException("Must not specify both UNTIL and COUNT: " + recur);
} else {
Log.w(TAG, "Warning: rrule has both UNTIL and COUNT: " + recur);
}
}
}
/**
* Base class for the RRULE part parsers.
*/
abstract static class PartParser {
/**
* Parses a single part.
*
* @param value The right-hand-side of the part.
* @param er The EventRecurrence into which the result is stored.
* @return A bit value indicating which part was parsed.
*/
public abstract int parsePart(String value, EventRecurrence er);
/**
* Parses an integer, with range-checking.
*
* @param str The string to parse.
* @param minVal Minimum allowed value.
* @param maxVal Maximum allowed value.
* @param allowZero Is 0 allowed?
* @return The parsed value.
*/
public static int parseIntRange(String str, int minVal, int maxVal, boolean allowZero) {
try {
if (str.charAt(0) == '+') {
// Integer.parseInt does not allow a leading '+', so skip it manually.
str = str.substring(1);
}
int val = Integer.parseInt(str);
if (val < minVal || val > maxVal || (val == 0 && !allowZero)) {
throw new InvalidFormatException("Integer value out of range: " + str);
}
return val;
} catch (NumberFormatException nfe) {
throw new InvalidFormatException("Invalid integer value: " + str);
}
}
/**
* Parses a comma-separated list of integers, with range-checking.
*
* @param listStr The string to parse.
* @param minVal Minimum allowed value.
* @param maxVal Maximum allowed value.
* @param allowZero Is 0 allowed?
* @return A new array with values, sized to hold the exact number of elements.
*/
public static int[] parseNumberList(String listStr, int minVal, int maxVal,
boolean allowZero) {
int[] values;
if (listStr.indexOf(",") < 0) {
// Common case: only one entry, skip split() overhead.
values = new int[1];
values[0] = parseIntRange(listStr, minVal, maxVal, allowZero);
} else {
String[] valueStrs = listStr.split(",");
int len = valueStrs.length;
values = new int[len];
for (int i = 0; i < len; i++) {
values[i] = parseIntRange(valueStrs[i], minVal, maxVal, allowZero);
}
}
return values;
}
}
/** parses FREQ={SECONDLY,MINUTELY,...} */
private static class ParseFreq extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
Integer freq = sParseFreqMap.get(value);
if (freq == null) {
throw new InvalidFormatException("Invalid FREQ value: " + value);
}
er.freq = freq;
return PARSED_FREQ;
}
}
/** parses UNTIL=enddate, e.g. "19970829T021400" */
private static class ParseUntil extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
if (VALIDATE_UNTIL) {
try {
// Parse the time to validate it. The result isn't retained.
Time until = new Time();
until.parse(value);
} catch (TimeFormatException tfe) {
throw new InvalidFormatException("Invalid UNTIL value: " + value);
}
}
er.until = value;
return PARSED_UNTIL;
}
}
/** parses COUNT=[non-negative-integer] */
private static class ParseCount extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
er.count = parseIntRange(value, Integer.MIN_VALUE, Integer.MAX_VALUE, true);
if (er.count < 0) {
Log.d(TAG, "Invalid Count. Forcing COUNT to 1 from " + value);
er.count = 1; // invalid count. assume one time recurrence.
}
return PARSED_COUNT;
}
}
/** parses INTERVAL=[non-negative-integer] */
private static class ParseInterval extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
er.interval = parseIntRange(value, Integer.MIN_VALUE, Integer.MAX_VALUE, true);
if (er.interval < 1) {
Log.d(TAG, "Invalid Interval. Forcing INTERVAL to 1 from " + value);
er.interval = 1;
}
return PARSED_INTERVAL;
}
}
/** parses BYSECOND=byseclist */
private static class ParseBySecond extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] bysecond = parseNumberList(value, 0, 59, true);
er.bysecond = bysecond;
er.bysecondCount = bysecond.length;
return PARSED_BYSECOND;
}
}
/** parses BYMINUTE=byminlist */
private static class ParseByMinute extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] byminute = parseNumberList(value, 0, 59, true);
er.byminute = byminute;
er.byminuteCount = byminute.length;
return PARSED_BYMINUTE;
}
}
/** parses BYHOUR=byhrlist */
private static class ParseByHour extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] byhour = parseNumberList(value, 0, 23, true);
er.byhour = byhour;
er.byhourCount = byhour.length;
return PARSED_BYHOUR;
}
}
/** parses BYDAY=bywdaylist, e.g. "1SU,-1SU" */
private static class ParseByDay extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] byday;
int[] bydayNum;
int bydayCount;
if (value.indexOf(",") < 0) {
/* only one entry, skip split() overhead */
bydayCount = 1;
byday = new int[1];
bydayNum = new int[1];
parseWday(value, byday, bydayNum, 0);
} else {
String[] wdays = value.split(",");
int len = wdays.length;
bydayCount = len;
byday = new int[len];
bydayNum = new int[len];
for (int i = 0; i < len; i++) {
parseWday(wdays[i], byday, bydayNum, i);
}
}
er.byday = byday;
er.bydayNum = bydayNum;
er.bydayCount = bydayCount;
return PARSED_BYDAY;
}
/** parses [int]weekday, putting the pieces into parallel array entries */
private static void parseWday(String str, int[] byday, int[] bydayNum, int index) {
int wdayStrStart = str.length() - 2;
String wdayStr;
if (wdayStrStart > 0) {
/* number is included; parse it out and advance to weekday */
String numPart = str.substring(0, wdayStrStart);
int num = parseIntRange(numPart, -53, 53, false);
bydayNum[index] = num;
wdayStr = str.substring(wdayStrStart);
} else {
/* just the weekday string */
wdayStr = str;
}
Integer wday = sParseWeekdayMap.get(wdayStr);
if (wday == null) {
throw new InvalidFormatException("Invalid BYDAY value: " + str);
}
byday[index] = wday;
}
}
/** parses BYMONTHDAY=bymodaylist */
private static class ParseByMonthDay extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] bymonthday = parseNumberList(value, -31, 31, false);
er.bymonthday = bymonthday;
er.bymonthdayCount = bymonthday.length;
return PARSED_BYMONTHDAY;
}
}
/** parses BYYEARDAY=byyrdaylist */
private static class ParseByYearDay extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] byyearday = parseNumberList(value, -366, 366, false);
er.byyearday = byyearday;
er.byyeardayCount = byyearday.length;
return PARSED_BYYEARDAY;
}
}
/** parses BYWEEKNO=bywknolist */
private static class ParseByWeekNo extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] byweekno = parseNumberList(value, -53, 53, false);
er.byweekno = byweekno;
er.byweeknoCount = byweekno.length;
return PARSED_BYWEEKNO;
}
}
/** parses BYMONTH=bymolist */
private static class ParseByMonth extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] bymonth = parseNumberList(value, 1, 12, false);
er.bymonth = bymonth;
er.bymonthCount = bymonth.length;
return PARSED_BYMONTH;
}
}
/** parses BYSETPOS=bysplist */
private static class ParseBySetPos extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
int[] bysetpos = parseNumberList(value, Integer.MIN_VALUE, Integer.MAX_VALUE, true);
er.bysetpos = bysetpos;
er.bysetposCount = bysetpos.length;
return PARSED_BYSETPOS;
}
}
/** parses WKST={SU,MO,...} */
private static class ParseWkst extends PartParser {
@Override public int parsePart(String value, EventRecurrence er) {
Integer wkst = sParseWeekdayMap.get(value);
if (wkst == null) {
throw new InvalidFormatException("Invalid WKST value: " + value);
}
er.wkst = wkst;
return PARSED_WKST;
}
}
}