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/*
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* Copyright (C) 2015-2017 Álinson Santos Xavier <isoron@gmail.com>
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*
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* This file is part of Loop Habit Tracker.
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*
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* Loop Habit Tracker is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* Loop Habit Tracker is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.isoron.uhabits.core.models;
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import org.apache.commons.lang3.builder.*;
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import java.util.*;
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import static java.util.Calendar.DAY_OF_WEEK;
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public class Timestamp
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{
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public static final long DAY_LENGTH = 86400000;
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public static final Timestamp ZERO = new Timestamp(0);
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private final long unixTime;
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public Timestamp(long unixTime)
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{
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if (unixTime < 0 || unixTime % DAY_LENGTH != 0)
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throw new IllegalArgumentException(
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"Invalid unix time: " + unixTime);
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this.unixTime = unixTime;
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}
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public Timestamp(GregorianCalendar cal)
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{
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this(cal.getTimeInMillis());
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}
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public long getUnixTime()
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{
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return unixTime;
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}
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/**
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* Returns -1 if this timestamp is older than the given timestamp, 1 if this
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* timestamp is newer, or zero if they are equal.
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*/
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public int compare(Timestamp other)
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{
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return Long.signum(this.unixTime - other.unixTime);
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}
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@Override
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public boolean equals(Object o)
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{
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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Timestamp timestamp = (Timestamp) o;
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return new EqualsBuilder()
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.append(unixTime, timestamp.unixTime)
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.isEquals();
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}
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@Override
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public int hashCode()
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{
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return new HashCodeBuilder(17, 37).append(unixTime).toHashCode();
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}
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/**
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* Given two timestamps, returns whichever timestamp is the oldest one.
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*/
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public static Timestamp oldest(Timestamp first, Timestamp second)
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{
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return first.unixTime < second.unixTime ? first : second;
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}
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public Timestamp minus(int days)
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{
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return plus(-days);
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}
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public Timestamp plus(int days)
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{
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return new Timestamp(unixTime + DAY_LENGTH * days);
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}
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/**
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* Returns the number of days between this timestamp and the given one. If
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* the other timestamp equals this one, returns zero. If the other timestamp
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* is older than this one, returns a negative number.
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*/
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public int daysUntil(Timestamp other)
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{
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return (int) ((other.unixTime - this.unixTime) / DAY_LENGTH);
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}
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public boolean isNewerThan(Timestamp other)
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{
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return compare(other) > 0;
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}
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public boolean isOlderThan(Timestamp other)
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{
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return compare(other) < 0;
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}
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public Date toJavaDate()
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{
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return new Date(unixTime);
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}
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public GregorianCalendar toCalendar()
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{
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GregorianCalendar day =
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new GregorianCalendar(TimeZone.getTimeZone("GMT"));
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day.setTimeInMillis(unixTime);
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return day;
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}
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@Override
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public String toString()
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{
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return new ToStringBuilder(this)
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.append("unixTime", unixTime)
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.toString();
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}
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public int getWeekday()
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{
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return toCalendar().get(DAY_OF_WEEK) % 7;
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}
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}
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@ -0,0 +1,68 @@
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/*
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* Copyright (C) 2015-2017 Álinson Santos Xavier <isoron@gmail.com>
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*
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* This file is part of Loop Habit Tracker.
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*
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* Loop Habit Tracker is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* Loop Habit Tracker is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.isoron.uhabits.core.models;
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import org.isoron.uhabits.core.*;
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import org.isoron.uhabits.core.utils.*;
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import org.junit.*;
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import static junit.framework.TestCase.assertFalse;
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import static org.hamcrest.MatcherAssert.*;
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import static org.hamcrest.Matchers.*;
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import static org.junit.Assert.assertTrue;
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public class TimestampTest extends BaseUnitTest
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{
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@Test
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public void testCompare() throws Exception
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{
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Timestamp t1 = DateUtils.getToday();
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Timestamp t2 = t1.minus(1);
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Timestamp t3 = t1.plus(3);
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assertThat(t1.compare(t2), greaterThan(0));
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assertThat(t1.compare(t1), equalTo(0));
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assertThat(t1.compare(t3), lessThan(0));
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assertTrue(t1.isNewerThan(t2));
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assertFalse(t1.isNewerThan(t1));
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assertFalse(t2.isNewerThan(t1));
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assertTrue(t2.isOlderThan(t1));
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assertFalse(t1.isOlderThan(t2));
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}
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@Test
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public void testDaysUntil() throws Exception
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{
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Timestamp t = DateUtils.getToday();
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assertThat(t.daysUntil(t), equalTo(0));
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assertThat(t.daysUntil(t.plus(1)), equalTo(1));
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assertThat(t.daysUntil(t.plus(3)), equalTo(3));
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assertThat(t.daysUntil(t.plus(300)), equalTo(300));
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assertThat(t.daysUntil(t.minus(1)), equalTo(-1));
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assertThat(t.daysUntil(t.minus(3)), equalTo(-3));
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assertThat(t.daysUntil(t.minus(300)), equalTo(-300));
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}
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}
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