1 files changed, 29 insertions, 25 deletions

diff --git a/src/org/unitConverter/unit/BaseUnit.java b/src/org/unitConverter/unit/BaseUnit.java
index 8f44861..8fd0664 100644
--- a/src/org/unitConverter/unit/BaseUnit.java
+++ b/src/org/unitConverter/unit/BaseUnit.java
@@ -16,10 +16,15 @@
  */
 package org.unitConverter.unit;
 
+import java.util.HashSet;
 import java.util.Objects;
+import java.util.Set;
 
 /**
  * A unit that other units are defined by.
+ * <p>
+ * Note that BaseUnits <b>must</b> have names and symbols. This is because they are used for toString code. Therefore,
+ * the Optionals provided by {@link #getPrimaryName} and {@link #getSymbol} will always contain a value.
  * 
  * @author Adrien Hopkins
  * @since 2019-10-16
@@ -38,19 +43,34 @@ public final class BaseUnit extends Unit {
 	 * @since 2019-10-16
 	 */
 	public static BaseUnit valueOf(final BaseDimension dimension, final String name, final String symbol) {
-		return new BaseUnit(dimension, name, symbol);
+		return new BaseUnit(dimension, name, symbol, new HashSet<>());
+	}
+
+	/**
+	 * Gets a base unit from the dimension it measures, its name and its symbol.
+	 * 
+	 * @param dimension
+	 *            dimension measured by this unit
+	 * @param name
+	 *            name of unit
+	 * @param symbol
+	 *            symbol of unit
+	 * @return base unit
+	 * @since 2019-10-21
+	 */
+	public static BaseUnit valueOf(final BaseDimension dimension, final String name, final String symbol,
+			final Set<String> otherNames) {
+		return new BaseUnit(dimension, name, symbol, otherNames);
 	}
 
 	private final BaseDimension dimension;
-	private final String name;
-	private final String symbol;
 
 	/**
 	 * Creates the {@code BaseUnit}.
 	 * 
 	 * @param dimension
 	 *            dimension of unit
-	 * @param name
+	 * @param primaryName
 	 *            name of unit
 	 * @param symbol
 	 *            symbol of unit
@@ -58,11 +78,10 @@ public final class BaseUnit extends Unit {
 	 *             if any argument is null
 	 * @since 2019-10-16
 	 */
-	private BaseUnit(final BaseDimension dimension, final String name, final String symbol) {
-		super();
+	private BaseUnit(final BaseDimension dimension, final String primaryName, final String symbol,
+			final Set<String> otherNames) {
+		super(primaryName, symbol, otherNames);
 		this.dimension = Objects.requireNonNull(dimension, "dimension must not be null.");
-		this.name = Objects.requireNonNull(name, "name must not be null.");
-		this.symbol = Objects.requireNonNull(symbol, "symbol must not be null.");
 	}
 
 	/**
@@ -94,24 +113,9 @@ public final class BaseUnit extends Unit {
 		return this.dimension;
 	}
 
-	/**
-	 * @return name
-	 * @since 2019-10-16
-	 */
-	public final String getName() {
-		return this.name;
-	}
-
-	/**
-	 * @return symbol
-	 * @since 2019-10-16
-	 */
-	public final String getSymbol() {
-		return this.symbol;
-	}
-
 	@Override
 	public String toString() {
-		return String.format("%s (%s)", this.getName(), this.getSymbol());
+		return this.getPrimaryName().orElse("Unnamed unit")
+				+ (this.getSymbol().isPresent() ? String.format(" (%s)", this.getSymbol().get()) : "");
 	}
 }