diff options
Diffstat (limited to 'src/main/java/sevenUnits/unit/Unit.java')
| -rw-r--r-- | src/main/java/sevenUnits/unit/Unit.java | 131 |
1 files changed, 45 insertions, 86 deletions
diff --git a/src/main/java/sevenUnits/unit/Unit.java b/src/main/java/sevenUnits/unit/Unit.java index 59e928a..40e6e0d 100644 --- a/src/main/java/sevenUnits/unit/Unit.java +++ b/src/main/java/sevenUnits/unit/Unit.java @@ -1,5 +1,5 @@ /** - * Copyright (C) 2019 Adrien Hopkins + * Copyright (C) 2019, 2021, 2022, 2024, 2025 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 @@ -28,22 +28,23 @@ import sevenUnits.utils.ObjectProduct; /** * A unit that is composed of base units. - * + * * @author Adrien Hopkins * @since 2019-10-16 + * @since v0.3.0 */ public abstract class Unit implements Nameable { /** * Returns a unit from its base and the functions it uses to convert to and * from its base. - * + * * <p> * For example, to get a unit representing the degree Celsius, the following * code can be used: - * + * * {@code Unit.fromConversionFunctions(SI.KELVIN, tempK -> tempK - 273.15, tempC -> tempC + 273.15);} * </p> - * + * * @param base unit's base * @param converterFrom function that accepts a value expressed in the unit's * base and returns that value expressed in this unit. @@ -51,6 +52,7 @@ public abstract class Unit implements Nameable { * and returns that value expressed in the unit's base. * @return a unit that uses the provided functions to convert. * @since 2019-05-22 + * @since v0.3.0 * @throws NullPointerException if any argument is null */ public static final Unit fromConversionFunctions( @@ -63,14 +65,14 @@ public abstract class Unit implements Nameable { /** * Returns a unit from its base and the functions it uses to convert to and * from its base. - * + * * <p> * For example, to get a unit representing the degree Celsius, the following * code can be used: - * + * * {@code Unit.fromConversionFunctions(SI.KELVIN, tempK -> tempK - 273.15, tempC -> tempC + 273.15);} * </p> - * + * * @param base unit's base * @param converterFrom function that accepts a value expressed in the unit's * base and returns that value expressed in this unit. @@ -79,6 +81,7 @@ public abstract class Unit implements Nameable { * @param ns names and symbol of unit * @return a unit that uses the provided functions to convert. * @since 2019-05-22 + * @since v0.3.0 * @throws NullPointerException if any argument is null */ public static final Unit fromConversionFunctions( @@ -90,15 +93,17 @@ public abstract class Unit implements Nameable { /** * The combination of units that this unit is based on. - * + * * @since 2019-10-16 + * @since v0.3.0 */ private final ObjectProduct<BaseUnit> unitBase; /** * This unit's name(s) and symbol - * + * * @since 2020-09-07 + * @since v0.3.0 */ private final NameSymbol nameSymbol; @@ -106,28 +111,30 @@ public abstract class Unit implements Nameable { * Cache storing the result of getDimension() * * @since 2019-10-16 + * @since v0.3.0 */ private transient ObjectProduct<BaseDimension> dimension = null; /** * A constructor that constructs {@code BaseUnit} instances. - * + * * @since 2019-10-16 + * @since v0.3.0 */ Unit(final NameSymbol nameSymbol) { - if (this instanceof BaseUnit) { - this.unitBase = ObjectProduct.oneOf((BaseUnit) this); - } else + if (!(this instanceof BaseUnit)) throw new AssertionError(); + this.unitBase = ObjectProduct.oneOf((BaseUnit) this); this.nameSymbol = nameSymbol; } /** * Creates the {@code Unit}. - * + * * @param unitBase base of unit * @param ns names and symbol of unit * @since 2019-10-16 + * @since v0.3.0 * @throws NullPointerException if unitBase or ns is null */ protected Unit(ObjectProduct<BaseUnit> unitBase, NameSymbol ns) { @@ -137,18 +144,9 @@ public abstract class Unit implements Nameable { } /** - * @return this unit as a {@link Unitlike} - * @since 2020-09-07 - */ - public final Unitlike<Double> asUnitlike() { - return Unitlike.fromConversionFunctions(this.getBase(), - this::convertFromBase, this::convertToBase, this.getNameSymbol()); - } - - /** * Checks if a value expressed in this unit can be converted to a value * expressed in {@code other} - * + * * @param other unit or unitlike form to test with * @return true if they are compatible * @since 2019-01-13 @@ -161,21 +159,6 @@ public abstract class Unit implements Nameable { } /** - * Checks if a value expressed in this unit can be converted to a value - * expressed in {@code other} - * - * @param other unit or unitlike form to test with - * @return true if they are compatible - * @since 2019-01-13 - * @since v0.1.0 - * @throws NullPointerException if other is null - */ - public final <W> boolean canConvertTo(final Unitlike<W> other) { - Objects.requireNonNull(other, "other must not be null."); - return Objects.equals(this.getBase(), other.getBase()); - } - - /** * Converts from a value expressed in this unit's base unit to a value * expressed in this unit. * <p> @@ -187,10 +170,10 @@ public abstract class Unit implements Nameable { * If this unit <i>is</i> a base unit, this method should return * {@code value}. * </p> - * + * * @implSpec This method is used by {@link #convertTo}, and its behaviour * affects the behaviour of {@code convertTo}. - * + * * @param value value expressed in <b>base</b> unit * @return value expressed in <b>this</b> unit * @since 2018-12-22 @@ -201,16 +184,17 @@ public abstract class Unit implements Nameable { /** * Converts a value expressed in this unit to a value expressed in * {@code other}. - * + * * @implSpec If unit conversion is possible, this implementation returns * {@code other.convertFromBase(this.convertToBase(value))}. * Therefore, overriding either of those methods will change the * output of this method. - * + * * @param other unit to convert to * @param value value to convert * @return converted value * @since 2019-05-22 + * @since v0.3.0 * @throws IllegalArgumentException if {@code other} is incompatible for * conversion with this unit (as tested by * {@link Unit#canConvertTo}). @@ -220,37 +204,8 @@ public abstract class Unit implements Nameable { Objects.requireNonNull(other, "other must not be null."); if (this.canConvertTo(other)) return other.convertFromBase(this.convertToBase(value)); - else - throw new IllegalArgumentException( - String.format("Cannot convert from %s to %s.", this, other)); - } - - /** - * Converts a value expressed in this unit to a value expressed in - * {@code other}. - * - * @implSpec If conversion is possible, this implementation returns - * {@code other.convertFromBase(this.convertToBase(value))}. - * Therefore, overriding either of those methods will change the - * output of this method. - * - * @param other unitlike form to convert to - * @param value value to convert - * @param <W> type of value to convert to - * @return converted value - * @since 2020-09-07 - * @throws IllegalArgumentException if {@code other} is incompatible for - * conversion with this unit (as tested by - * {@link Unit#canConvertTo}). - * @throws NullPointerException if other is null - */ - public final <W> W convertTo(final Unitlike<W> other, final double value) { - Objects.requireNonNull(other, "other must not be null."); - if (this.canConvertTo(other)) - return other.convertFromBase(this.convertToBase(value)); - else - throw new IllegalArgumentException( - String.format("Cannot convert from %s to %s.", this, other)); + throw new IllegalArgumentException( + String.format("Cannot convert from %s to %s.", this, other)); } /** @@ -265,10 +220,10 @@ public abstract class Unit implements Nameable { * If this unit <i>is</i> a base unit, this method should return * {@code value}. * </p> - * + * * @implSpec This method is used by {@link #convertTo}, and its behaviour * affects the behaviour of {@code convertTo}. - * + * * @param value value expressed in <b>this</b> unit * @return value expressed in <b>base</b> unit * @since 2018-12-22 @@ -292,7 +247,7 @@ public abstract class Unit implements Nameable { */ public final ObjectProduct<BaseDimension> getDimension() { if (this.dimension == null) { - final Map<BaseUnit, Integer> mapping = this.unitBase.exponentMap(); + final var mapping = this.unitBase.exponentMap(); final Map<BaseDimension, Integer> dimensionMap = new HashMap<>(); for (final BaseUnit key : mapping.keySet()) { @@ -307,6 +262,7 @@ public abstract class Unit implements Nameable { /** * @return the nameSymbol * @since 2020-09-07 + * @since v0.3.0 */ @Override public final NameSymbol getNameSymbol() { @@ -314,7 +270,7 @@ public abstract class Unit implements Nameable { } /** - * Returns true iff this unit is metric. + * Determines whether this unit is metric. * <p> * "Metric" is defined by three conditions: * <ul> @@ -329,14 +285,17 @@ public abstract class Unit implements Nameable { * <p> * All SI units (as designated by the BIPM) except the degree Celsius are * considered "metric" by this definition. - * + * + * @return true iff this unit is metric. + * * @since 2020-08-27 + * @since v0.3.0 */ public final boolean isMetric() { // first condition - check that it is a linear unit if (!(this instanceof LinearUnit)) return false; - final LinearUnit linear = (LinearUnit) this; + final var linear = (LinearUnit) this; // second condition - check that for (final BaseUnit b : linear.getBase().getBaseSet()) { @@ -352,18 +311,18 @@ public abstract class Unit implements Nameable { /** * @return a string representing this unit's definition * @since 2022-03-10 + * @since v0.3.0 */ public String toDefinitionString() { if (!this.unitBase.getNameSymbol().isEmpty()) return "derived from " + this.unitBase.getName(); - else - return "derived from " - + this.getBase().toString(BaseUnit::getShortName); + return "derived from " + this.getBase().toString(BaseUnit::getShortName); } /** * @return a string containing both this unit's name and its definition * @since 2022-03-10 + * @since v0.3.0 */ public final String toFullString() { return this.toString() + " (" + this.toDefinitionString() + ")"; @@ -375,14 +334,14 @@ public abstract class Unit implements Nameable { && this.nameSymbol.getSymbol().isPresent()) return this.nameSymbol.getPrimaryName().orElseThrow() + " (" + this.nameSymbol.getSymbol().orElseThrow() + ")"; - else - return this.getName(); + return this.getName(); } /** * @param ns name(s) and symbol to use * @return a copy of this unit with provided name(s) and symbol * @since 2019-10-21 + * @since v0.3.0 * @throws NullPointerException if ns is null */ public Unit withName(final NameSymbol ns) { |