/**
* Copyright © 2002 Instituto Superior Técnico
*
* This file is part of FenixEdu Academic.
*
* FenixEdu Academic is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* FenixEdu Academic 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FenixEdu Academic. If not, see <http://www.gnu.org/licenses/>.
*/
package org.fenixedu.academic.domain.time.chronologies.durationFields;
import org.fenixedu.academic.domain.time.calendarStructure.AcademicSemesterCE;
import org.fenixedu.academic.domain.time.chronologies.AcademicChronology;
import org.joda.time.Duration;
import org.joda.time.DurationFieldType;
import org.joda.time.field.BaseDurationField;
import org.joda.time.field.FieldUtils;
public class AcademicSemestersDurationField extends BaseDurationField {
private final AcademicChronology chronology;
public AcademicSemestersDurationField(AcademicChronology chronology_) {
super(AcademicSemestersDurationFieldType.academicSemesters());
this.chronology = chronology_;
}
private UnsupportedOperationException unsupported() {
return new UnsupportedOperationException(AcademicSemestersDurationFieldType.academicSemesters() + " field is unsupported");
}
@Override
public long add(long instant, int value) {
int academicSemester = chronology.getAcademicSemester(instant);
if (academicSemester != 0) {
AcademicSemesterCE academicSemesterCE = chronology.getAcademicSemesterIn(academicSemester);
AcademicSemesterCE academicSemesterCEAfter = chronology.getAcademicSemesterIn(academicSemester + value);
if (academicSemesterCEAfter != null) {
long result =
academicSemesterCEAfter.getBegin().getMillis()
+ new Duration(academicSemesterCE.getBegin().getMillis(), instant).getMillis();
return result < academicSemesterCE.getEnd().getMillis() ? result : academicSemesterCE.getEnd().getMillis();
}
}
throw unsupported();
}
@Override
public long add(long instant, long value) {
return add(instant, FieldUtils.safeToInt(value));
}
@Override
public long getDifferenceAsLong(long minuendInstant, long subtrahendInstant) {
int minuendAcademicSemester = chronology.getAcademicSemester(minuendInstant);
int subtrahendAcademicSemester = chronology.getAcademicSemester(subtrahendInstant);
if (minuendAcademicSemester != 0 && subtrahendAcademicSemester != 0) {
return minuendAcademicSemester - subtrahendAcademicSemester;
}
throw unsupported();
}
@Override
public long getMillis(int value, long instant) {
int academicSemester = chronology.getAcademicSemester(instant);
if (academicSemester != 0) {
AcademicSemesterCE academicSemesterCE = chronology.getAcademicSemesterIn(academicSemester);
AcademicSemesterCE academicSemesterCEAfter = chronology.getAcademicSemesterIn(academicSemester + value);
if (academicSemesterCEAfter != null) {
long result =
academicSemesterCEAfter.getBegin().getMillis()
+ new Duration(academicSemesterCE.getBegin().getMillis(), instant).getMillis();
return result < academicSemesterCE.getEnd().getMillis() ? result - instant : academicSemesterCE.getEnd()
.getMillis() - instant;
}
}
throw unsupported();
}
@Override
public long getMillis(long value, long instant) {
return getMillis(FieldUtils.safeToInt(value), instant);
}
@Override
public long getUnitMillis() {
return DurationFieldType.years().getField(chronology).getUnitMillis() / 2;
}
@Override
public long getValueAsLong(long duration, long instant) {
int valueBegin = chronology.getAcademicSemester(instant);
int valueEnd = chronology.getAcademicSemester(instant + duration);
if (valueBegin != 0 && valueEnd != 0) {
return valueEnd - valueBegin;
}
throw unsupported();
}
@Override
public boolean isPrecise() {
return false;
}
}