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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.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.StringTokenizer;
/**
* Rule manipulates Rule records.
*
* @since 1.4
*/
class Rule {
private List<RuleRec> list;
private String name;
/**
* Constructs a Rule which consists of a Rule record list. The
* specified name is given to this Rule.
* @param name the Rule name
*/
Rule(String name) {
this.name = name;
list = new ArrayList<RuleRec>();
}
/**
* Added a RuleRec to the Rule record list.
*/
void add(RuleRec rec) {
list.add(rec);
}
/**
* @return the Rule name
*/
String getName() {
return name;
}
/**
* Gets all rule records that cover the given year.
*
* @param year the year number for which the rule is applicable.
* @return rules in List that are collated in time. If no rule is found, an empty
* List is returned.
*/
List<RuleRec> getRules(int year) {
List<RuleRec> rules = new ArrayList<RuleRec>(3);
for (RuleRec rec : list) {
if (year >= rec.getFromYear() && year <= rec.getToYear()) {
if ((rec.isOdd() && year % 2 == 0) || (rec.isEven() && year % 2 == 1))
continue;
rules.add(rec);
}
}
int n = rules.size();
if (n <= 1) {
return rules;
}
if (n == 2) {
RuleRec rec1 = rules.get(0);
RuleRec rec2 = rules.get(1);
if (rec1.getMonthNum() > rec2.getMonthNum()) {
rules.set(0, rec2);
rules.set(1, rec1);
} else if (rec1.getMonthNum() == rec2.getMonthNum()) {
// TODO: it's not accurate to ignore time types (STD, WALL, UTC)
long t1 = Time.getLocalTime(year, rec1.getMonth(),
rec1.getDay(), rec1.getTime().getTime());
long t2 = Time.getLocalTime(year, rec2.getMonth(),
rec2.getDay(), rec2.getTime().getTime());
if (t1 > t2) {
rules.set(0, rec2);
rules.set(1, rec1);
}
}
return rules;
}
final int y = year;
RuleRec[] recs = new RuleRec[rules.size()];
rules.toArray(recs);
Arrays.sort(recs, new Comparator<RuleRec>() {
public int compare(RuleRec r1, RuleRec r2) {
int n = r1.getMonthNum() - r2.getMonthNum();
if (n != 0) {
return n;
}
// TODO: it's not accurate to ignore time types (STD, WALL, UTC)
long t1 = Time.getLocalTime(y, r1.getMonth(),
r1.getDay(), r1.getTime().getTime());
long t2 = Time.getLocalTime(y, r2.getMonth(),
r2.getDay(), r2.getTime().getTime());
return Long.compare(t1, t2);
}
public boolean equals(Object o) {
return this == o;
}
});
rules.clear();
for (int i = 0; i < n; i++) {
if (i != 0 && recs[i -1].getSave() == recs[i].getSave()) {
// we have two recs back to back with same saving for the same year.
if (recs[i].isLastRule()) {
continue;
} else if (recs[i - 1].isLastRule()) {
rules.remove(rules.size() - 1);
}
}
rules.add(recs[i]);
}
return rules;
}
/**
* Gets rule records that have either "max" or cover the endYear
* value in its DST schedule.
*
* @return rules that contain last DST schedule. An empty
* ArrayList is returned if no last rules are found.
*/
List<RuleRec> getLastRules() {
RuleRec start = null;
RuleRec end = null;
for (int i = 0; i < list.size(); i++) {
RuleRec rec = list.get(i);
if (rec.isLastRule()) {
if (rec.getSave() > 0) {
start = rec;
} else {
end = rec;
}
}
}
if (start == null || end == null) {
int endYear = Zoneinfo.getEndYear();
for (int i = 0; i < list.size(); i++) {
RuleRec rec = list.get(i);
if (endYear >= rec.getFromYear() && endYear <= rec.getToYear()) {
if (start == null && rec.getSave() > 0) {
start = rec;
} else {
if (end == null && rec.getSave() == 0) {
end = rec;
}
}
}
}
}
List<RuleRec> r = new ArrayList<RuleRec>(2);
if (start == null || end == null) {
if (start != null || end != null) {
Main.warning("found last rules for "+name+" inconsistent.");
}
return r;
}
r.add(start);
r.add(end);
return r;
}
}
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