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/**
* Copyright (C) 2020 Adrien Hopkins
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package org.unitConverter.unit;
import java.util.Optional;
/**
*
* @since 2020-09-07
*/
final class UnitlikeValue<T extends Unitlike<V>, V> {
/**
* Gets a {@code UnitlikeValue<V>}.
*
* @since 2020-10-02
*/
public static <T extends Unitlike<V>, V> UnitlikeValue<T, V> of(T unitlike,
V value) {
return new UnitlikeValue<>(unitlike, value);
}
private final T unitlike;
private final V value;
/**
* @param unitlike
* @param value
* @since 2020-09-07
*/
private UnitlikeValue(T unitlike, V value) {
this.unitlike = unitlike;
this.value = value;
}
/**
* @return true if this value can be converted to {@code other}.
* @since 2020-10-01
*/
public final boolean canConvertTo(Unit other) {
return this.unitlike.canConvertTo(other);
}
/**
* @return true if this value can be converted to {@code other}.
* @since 2020-10-01
*/
public final <W> boolean canConvertTo(Unitlike<W> other) {
return this.unitlike.canConvertTo(other);
}
/**
* Returns a UnitlikeValue that represents the same value expressed in a
* different unitlike form.
*
* @param other new unit to express value in
* @return value expressed in {@code other}
*/
public final <U extends Unitlike<W>, W> UnitlikeValue<U, W> convertTo(
U other) {
return UnitlikeValue.of(other,
this.unitlike.convertTo(other, this.getValue()));
}
/**
* Returns a UnitValue that represents the same value expressed in a
* different unit
*
* @param other new unit to express value in
* @return value expressed in {@code other}
*/
public final UnitValue convertTo(Unit other) {
return UnitValue.of(other,
this.unitlike.convertTo(other, this.getValue()));
}
/**
* Returns this unit value represented as a {@code LinearUnitValue} with this
* unit's base unit as the base.
*
* @param ns name and symbol for the base unit, use NameSymbol.EMPTY if not
* needed.
* @since 2020-09-29
*/
public final LinearUnitValue convertToBase(NameSymbol ns) {
final LinearUnit base = LinearUnit.getBase(this.unitlike).withName(ns);
return this.convertToLinear(base);
}
/**
* @return a {@code LinearUnitValue} that is equivalent to this value. It
* will have zero uncertainty.
* @since 2020-09-29
*/
public final LinearUnitValue convertToLinear(LinearUnit other) {
return LinearUnitValue.getExact(other,
this.getUnitlike().convertTo(other, this.getValue()));
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!(obj instanceof UnitlikeValue))
return false;
final UnitlikeValue<?, ?> other = (UnitlikeValue<?, ?>) obj;
if (this.getUnitlike() == null) {
if (other.getUnitlike() != null)
return false;
} else if (!this.getUnitlike().equals(other.getUnitlike()))
return false;
if (this.getValue() == null) {
if (other.getValue() != null)
return false;
} else if (!this.getValue().equals(other.getValue()))
return false;
return true;
}
/**
* @return the unitlike
* @since 2020-09-29
*/
public final Unitlike<V> getUnitlike() {
return this.unitlike;
}
/**
* @return the value
* @since 2020-09-29
*/
public final V getValue() {
return this.value;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ (this.getUnitlike() == null ? 0 : this.getUnitlike().hashCode());
result = prime * result
+ (this.getValue() == null ? 0 : this.getValue().hashCode());
return result;
}
@Override
public String toString() {
final Optional<String> primaryName = this.getUnitlike().getPrimaryName();
final Optional<String> symbol = this.getUnitlike().getSymbol();
if (primaryName.isEmpty() && symbol.isEmpty()) {
final double baseValue = this.getUnitlike()
.convertToBase(this.getValue());
return String.format("%s unnamed unit (= %s %s)", this.getValue(),
baseValue, this.getUnitlike().getBase());
} else {
final String unitName = symbol.orElse(primaryName.get());
return this.getValue() + " " + unitName;
}
}
}
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