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/*
* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.util.StringTokenizer;
/**
* RuleRec class represents one record of the Rule set.
*
* @since 1.4
*/
class RuleRec {
private int fromYear;
private int toYear;
private String type;
private Month inMonth;
private RuleDay onDay;
private Time atTime;
private int save;
private String letters;
private String line;
private boolean isLastRule;
int getFromYear() {
return fromYear;
}
int getToYear() {
return toYear;
}
Month getMonth() {
return inMonth;
}
int getMonthNum() {
return inMonth.value();
}
RuleDay getDay() {
return onDay;
}
Time getTime() {
return atTime;
}
int getSave() {
return save;
}
String getLine() {
return line;
}
/**
* Sets the line from the text file.
* @param line the text of the line
*/
void setLine(String line) {
this.line = line;
}
/**
* @return true if the rule type is "odd".
*/
boolean isOdd() {
return "odd".equals(type);
}
/**
* @return true if the rule type is "even".
*/
boolean isEven() {
return "even".equals(type);
}
/**
* Determines if this rule record is the last DST schedule rule.
*
* @return true if this rule record has "max" as TO (year).
*/
boolean isLastRule() {
return isLastRule;
}
/**
* Determines if the unadjusted until time of the specified ZoneRec
* is the same as the transition time of this rule in the same
* year as the ZoneRec until year.
*
* @param zrec ZoneRec to compare to
* @param save the amount of daylight saving in milliseconds
* @param gmtOffset the GMT offset value in milliseconds
* @return true if the unadjusted until time is the same as rule's
* transition time.
*/
boolean isSameTransition(ZoneRec zrec, int save, int gmtOffset) {
long until, transition;
if (zrec.getUntilTime().getType() != atTime.getType()) {
until = zrec.getLocalUntilTime(save, gmtOffset);
transition = Time.getLocalTime(zrec.getUntilYear(),
getMonth(),
getDay(),
save,
gmtOffset,
atTime);
} else {
until = zrec.getLocalUntilTime();
transition = Time.getLocalTime(zrec.getUntilYear(),
getMonth(),
getDay(),
atTime.getTime());
}
return until == transition;
}
/**
* Parses a Rule line and returns a RuleRec object.
*
* @param tokens a StringTokenizer object that should contain a
* token for the "FROM" field and the rest.
* @return a RuleRec object.
*/
static RuleRec parse(StringTokenizer tokens) {
RuleRec rec = new RuleRec();
try {
// FROM
String token = tokens.nextToken();
try {
rec.fromYear = Integer.parseInt(token);
} catch (NumberFormatException e) {
// it's not integer
if ("min".equals(token) || "minimum".equals(token)) {
rec.fromYear = Zoneinfo.getMinYear();
} else if ("max".equals(token) || "maximum".equals(token)) {
rec.fromYear = Zoneinfo.getMaxYear();
} else {
Main.panic("invalid year value: "+token);
}
}
// TO
token = tokens.nextToken();
rec.isLastRule = false;
try {
rec.toYear = Integer.parseInt(token);
} catch (NumberFormatException e) {
// it's not integer
if ("min".equals(token) || "minimum".equals(token)) {
rec.fromYear = Zoneinfo.getMinYear();
} else if ("max".equals(token) || "maximum".equals(token)) {
rec.toYear = Integer.MAX_VALUE;
rec.isLastRule = true;
} else if ("only".equals(token)) {
rec.toYear = rec.fromYear;
} else {
Main.panic("invalid year value: "+token);
}
}
// TYPE
rec.type = tokens.nextToken();
// IN
rec.inMonth = Month.parse(tokens.nextToken());
// ON
rec.onDay = RuleDay.parse(tokens.nextToken());
// AT
rec.atTime = Time.parse(tokens.nextToken());
// SAVE
rec.save = (int) Time.parse(tokens.nextToken()).getTime();
// LETTER/S
rec.letters = tokens.nextToken();
} catch (Exception e) {
e.printStackTrace();
}
return rec;
}
/**
* Calculates the transition time of the given year under this rule.
* @param year the year value
* @param gmtOffset the GMT offset value in milliseconds
* @param save the amount of daylight save time
* @return the transition time in milliseconds of the given year in UTC.
*/
long getTransitionTime(int year, int gmtOffset, int save) {
long time = Time.getLocalTime(year, getMonth(),
getDay(), atTime.getTime());
if (atTime.isSTD()) {
time -= gmtOffset;
} else if (atTime.isWall()) {
time -= gmtOffset + save;
}
return time;
}
private static int getInt(StringTokenizer tokens) {
String token = tokens.nextToken();
return Integer.parseInt(token);
}
}
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