com.google.ical.values.WeekdayNum Maven / Gradle / Ivy
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// Copyright (C) 2006 Google Inc.
//
// 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.google.ical.values;
/**
* represents a day of the week in a month or year such as the
* third monday of the month. A negative num indicates it counts from the
* end of the month or year.
*
*
* Each BYDAY value can also be preceded by a positive (+n) or negative
* (-n) integer. If present, this indicates the nth occurrence of the
* specific day within the MONTHLY or YEARLY RRULE. For example, within
* a MONTHLY rule, +1MO (or simply 1MO) represents the first Monday
* within the month, whereas -1MO represents the last Monday of the
* month. If an integer modifier is not present, it means all days of
* this type within the specified frequency. For example, within a
* MONTHLY rule, MO represents all Mondays within the month.
*
*
* @author [email protected] (Mike Samuel)
*/
public class WeekdayNum {
public final int num;
public final Weekday wday;
/**
* @param num in -53,53
* @param wday non null.
*/
public WeekdayNum(int num, Weekday wday) {
if (!(-53 <= num && 53 >= num && null != wday)) {
throw new IllegalArgumentException();
}
this.num = num;
this.wday = wday;
}
public String toIcal() {
return (0 != this.num)
? String.valueOf(this.num) + this.wday
: this.wday.toString();
}
@Override
public String toString() {
return toIcal();
}
@Override
public boolean equals(Object o) {
if (!(o instanceof WeekdayNum)) { return false; }
WeekdayNum wdn = (WeekdayNum) o;
return this.num == wdn.num && this.wday == wdn.wday;
}
@Override
public int hashCode() {
return num ^ (53 * wday.hashCode());
}
}