/* * 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.
*/
/** * 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);
} elseif (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;
}
finalint y = year;
RuleRec[] recs = new RuleRec[rules.size()];
rules.toArray(recs);
Arrays.sort(recs, new Comparator<RuleRec>() { publicint 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()); returnLong.compare(t1, t2);
} publicboolean equals(Object o) { returnthis == 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;
} elseif (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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