diff options
Diffstat (limited to 'src/org/unitConverter/dimension/UnitDimension.java')
| -rw-r--r-- | src/org/unitConverter/dimension/UnitDimension.java | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/src/org/unitConverter/dimension/UnitDimension.java b/src/org/unitConverter/dimension/UnitDimension.java deleted file mode 100644 index dbeaeff..0000000 --- a/src/org/unitConverter/dimension/UnitDimension.java +++ /dev/null @@ -1,241 +0,0 @@ -/**
- * Copyright (C) 2018 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.dimension;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Set;
-
-/**
- * An object that represents what a unit measures, like length, mass, area, energy, etc.
- *
- * @author Adrien Hopkins
- * @since 2018-12-11
- * @since v0.1.0
- */
-public final class UnitDimension {
- /**
- * The unit dimension where every exponent is zero
- *
- * @since 2018-12-12
- * @since v0.1.0
- */
- public static final UnitDimension EMPTY = new UnitDimension(new HashMap<>());
-
- /**
- * Gets an UnitDimension that has 1 of a certain dimension and nothing else
- *
- * @param dimension
- * dimension to get
- * @return unit dimension
- * @since 2018-12-11
- * @since v0.1.0
- */
- public static final UnitDimension getBase(final BaseDimension dimension) {
- final Map<BaseDimension, Integer> map = new HashMap<>();
- map.put(dimension, 1);
- return new UnitDimension(map);
- }
-
- /**
- * The base dimensions that make up this dimension.
- *
- * @since 2018-12-11
- * @since v0.1.0
- */
- final Map<BaseDimension, Integer> exponents;
-
- /**
- * Creates the {@code UnitDimension}.
- *
- * @param exponents
- * base dimensions that make up this dimension
- * @since 2018-12-11
- * @since v0.1.0
- */
- private UnitDimension(final Map<BaseDimension, Integer> exponents) {
- this.exponents = new HashMap<>(exponents);
- }
-
- /**
- * Divides this dimension by another
- *
- * @param other
- * other dimension
- * @return quotient of two dimensions
- * @since 2018-12-11
- * @since v0.1.0
- */
- public UnitDimension dividedBy(final UnitDimension other) {
- final Map<BaseDimension, Integer> map = new HashMap<>(this.exponents);
-
- for (final BaseDimension key : other.exponents.keySet()) {
- if (map.containsKey(key)) {
- // add the dimensions
- map.put(key, map.get(key) - other.exponents.get(key));
- } else {
- map.put(key, -other.exponents.get(key));
- }
- }
- return new UnitDimension(map);
- }
-
- @Override
- public boolean equals(final Object obj) {
- if (this == obj)
- return true;
- if (obj == null)
- return false;
- if (!(obj instanceof UnitDimension))
- return false;
- final UnitDimension other = (UnitDimension) obj;
-
- // anything with a value of 0 is equal to a nonexistent value
- for (final BaseDimension b : this.getBaseSet()) {
- if (this.exponents.get(b) != other.exponents.get(b))
- if (!(this.exponents.get(b) == 0 && !other.exponents.containsKey(b)))
- return false;
- }
- for (final BaseDimension b : other.getBaseSet()) {
- if (this.exponents.get(b) != other.exponents.get(b))
- if (!(other.exponents.get(b) == 0 && !this.exponents.containsKey(b)))
- return false;
- }
- return true;
- }
-
- /**
- * @return a set of all of the base dimensions with non-zero exponents that make up this dimension.
- * @since 2018-12-12
- * @since v0.1.0
- */
- public final Set<BaseDimension> getBaseSet() {
- final Set<BaseDimension> dimensions = new HashSet<>();
-
- // add all dimensions with a nonzero exponent - they shouldn't be there in the first place
- for (final BaseDimension dimension : this.exponents.keySet()) {
- if (!this.exponents.get(dimension).equals(0)) {
- dimensions.add(dimension);
- }
- }
-
- return dimensions;
- }
-
- /**
- * Gets the exponent for a specific dimension.
- *
- * @param dimension
- * dimension to check
- * @return exponent for that dimension
- * @since 2018-12-12
- * @since v0.1.0
- */
- public int getExponent(final BaseDimension dimension) {
- return this.exponents.getOrDefault(dimension, 0);
- }
-
- @Override
- public int hashCode() {
- return Objects.hash(this.exponents);
- }
-
- /**
- * @return true if this dimension is a base, i.e. it has one exponent of one and no other nonzero exponents
- * @since 2019-01-15
- * @since v0.1.0
- */
- public boolean isBase() {
- int oneCount = 0;
- boolean twoOrMore = false; // has exponents of 2 or more
- for (final BaseDimension b : this.getBaseSet()) {
- if (this.exponents.get(b) == 1) {
- oneCount++;
- } else if (this.exponents.get(b) != 0) {
- twoOrMore = true;
- }
- }
- return (oneCount == 0 || oneCount == 1) && !twoOrMore;
- }
-
- /**
- * Multiplies this dimension by another
- *
- * @param other
- * other dimension
- * @return product of two dimensions
- * @since 2018-12-11
- * @since v0.1.0
- */
- public UnitDimension times(final UnitDimension other) {
- final Map<BaseDimension, Integer> map = new HashMap<>(this.exponents);
-
- for (final BaseDimension key : other.exponents.keySet()) {
- if (map.containsKey(key)) {
- // add the dimensions
- map.put(key, map.get(key) + other.exponents.get(key));
- } else {
- map.put(key, other.exponents.get(key));
- }
- }
- return new UnitDimension(map);
- }
-
- /**
- * Returns this dimension, but to an exponent
- *
- * @param exp
- * exponent
- * @return result of exponientation
- * @since 2019-01-15
- * @since v0.1.0
- */
- public UnitDimension toExponent(final int exp) {
- final Map<BaseDimension, Integer> map = new HashMap<>(this.exponents);
- for (final BaseDimension key : this.exponents.keySet()) {
- map.put(key, this.getExponent(key) * exp);
- }
- return new UnitDimension(map);
- }
-
- @Override
- public String toString() {
- final List<String> positiveStringComponents = new ArrayList<>();
- final List<String> negativeStringComponents = new ArrayList<>();
-
- // for each base dimension that makes up this dimension, add it and its exponent
- for (final BaseDimension dimension : this.getBaseSet()) {
- final int exponent = this.exponents.get(dimension);
- if (exponent > 0) {
- positiveStringComponents.add(String.format("%s^%d", dimension.getSymbol(), exponent));
- } else if (exponent < 0) {
- negativeStringComponents.add(String.format("%s^%d", dimension.getSymbol(), -exponent));
- }
- }
-
- final String positiveString = positiveStringComponents.isEmpty() ? "1"
- : String.join(" ", positiveStringComponents);
- final String negativeString = negativeStringComponents.isEmpty() ? ""
- : " / " + String.join(" ", negativeStringComponents);
-
- return positiveString + negativeString;
- }
-}
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