/*
* ModeShape (http://www.modeshape.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.modeshape.common.math;
import java.math.BigDecimal;
import java.util.Comparator;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import org.modeshape.common.annotation.Immutable;
/**
* The {@link MathOperations math operations} for {@link Duration}s.
*/
@Immutable
public class DurationOperations implements MathOperations<Duration>, Comparator<Duration> {
@Override
public Class<Duration> getOperandClass() {
return Duration.class;
}
@Override
public Duration add( Duration value1,
Duration value2 ) {
if (value1 == null) return value2 != null ? value2 : createZeroValue();
if (value2 == null) return value1;
return value1.add(value2);
}
@Override
public Duration subtract( Duration value1,
Duration value2 ) {
if (value1 == null) return negate(value2);
if (value2 == null) return value1;
return value1.subtract(value2);
}
@Override
public Duration multiply( Duration value1,
Duration value2 ) {
if (value1 == null || value2 == null) return createZeroValue();
return value1.multiply(value2.longValue());
}
@Override
public double divide( Duration value1,
Duration value2 ) {
if (value1 == null || value2 == null) throw new IllegalArgumentException();
return value1.divide(value2);
}
@Override
public Duration negate( Duration value ) {
if (value == null) return createZeroValue();
return value.multiply(value.longValue() * -1);
}
@Override
public Duration increment( Duration value ) {
if (value == null) return createZeroValue();
return value.add(1l, TimeUnit.NANOSECONDS);
}
@Override
public Duration maximum( Duration value1,
Duration value2 ) {
if (value1 == null) return value2;
if (value2 == null) return value1;
return new Duration(Math.max(value1.longValue(), value2.longValue()));
}
@Override
public Duration minimum( Duration value1,
Duration value2 ) {
if (value1 == null) return value2;
if (value2 == null) return value1;
return new Duration(Math.min(value1.longValue(), value2.longValue()));
}
@Override
public int compare( Duration value1,
Duration value2 ) {
if (value1 == null) return value2 != null ? -1 : 0;
if (value2 == null) return 1;
return value1.compareTo(value2);
}
@Override
public BigDecimal asBigDecimal( Duration value ) {
return value != null ? value.toBigDecimal() : null;
}
@Override
public Duration fromBigDecimal( BigDecimal value ) {
return value != null ? new Duration(value.longValue()) : null;
}
@Override
public Duration createZeroValue() {
return new Duration(0l);
}
@Override
public Duration create( int value ) {
return new Duration(value);
}
@Override
public Duration create( long value ) {
return new Duration(value);
}
@Override
public Duration create( double value ) {
return new Duration((long)value);
}
@Override
public double sqrt( Duration value ) {
return Math.sqrt(value.longValue());
}
@Override
public Comparator<Duration> getComparator() {
return this;
}
@Override
public Duration random( Duration minimum,
Duration maximum,
Random rng ) {
Duration difference = subtract(maximum, minimum);
return new Duration(minimum.getDuratinInNanoseconds() + rng.nextInt(difference.intValue()));
}
@Override
public double doubleValue( Duration value ) {
return value.doubleValue();
}
@Override
public float floatValue( Duration value ) {
return value.floatValue();
}
@Override
public int intValue( Duration value ) {
return value.intValue();
}
@Override
public long longValue( Duration value ) {
return value.longValue();
}
@Override
public short shortValue( Duration value ) {
return value.shortValue();
}
@Override
public int getExponentInScientificNotation( Duration value ) {
long v = Math.abs(value.getDuratinInNanoseconds());
int exp = 0;
if (v > 1l) {
while (v >= 10l) {
v /= 10l;
++exp;
}
}
return exp;
}
@Override
public Duration roundUp( Duration durationValue,
int decimalShift ) {
long value = durationValue.longValue();
if (value == 0) return new Duration(0l);
if (decimalShift >= 0) return durationValue;
long shiftedValueP5 = Math.abs(value);
for (int i = 0; i != (-decimalShift - 1); ++i)
shiftedValueP5 /= 10l;
shiftedValueP5 += 5l;
long shiftedValue = shiftedValueP5 / 10l;
if (shiftedValue * 10l - shiftedValueP5 >= 5) ++shiftedValue;
shiftedValue *= Long.signum(value);
for (int i = 0; i != -decimalShift; ++i)
shiftedValue *= 10l;
return new Duration(shiftedValue);
}
@Override
public Duration roundDown( Duration durationValue,
int decimalShift ) {
long value = durationValue.longValue();
if (value == 0) return new Duration(0l);
if (decimalShift >= 0) return durationValue;
long shiftedValue = Math.abs(value);
for (int i = 0; i != -decimalShift; ++i)
shiftedValue /= 10l;
shiftedValue *= Long.signum(value);
for (int i = 0; i != -decimalShift; ++i)
shiftedValue *= 10l;
return new Duration(shiftedValue);
}
@Override
public Duration keepSignificantFigures( Duration value,
int numSigFigs ) {
if (numSigFigs < 0) return value;
if (numSigFigs == 0) return new Duration(0l);
int currentExp = getExponentInScientificNotation(value);
int decimalShift = -currentExp + numSigFigs - 1;
return roundUp(value, decimalShift);
}
}