Allow plugins to register number implementations and use user's choice.

src/org/nwapw/abacus/Abacus.java

@@ -2,6 +2,7 @@ package org.nwapw.abacus;
 
 import org.nwapw.abacus.config.ConfigurationObject;
 import org.nwapw.abacus.function.Operator;
+import org.nwapw.abacus.number.NaiveNumber;
 import org.nwapw.abacus.number.NumberInterface;
 import org.nwapw.abacus.plugin.ClassFinder;
 import org.nwapw.abacus.plugin.PluginListener;
@@ -15,6 +16,7 @@ import org.nwapw.abacus.window.Window;
 import javax.swing.*;
 import java.io.File;
 import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
 
 /**
  * The main calculator class. This is responsible
@@ -23,10 +25,14 @@ import java.io.IOException;
  */
 public class Abacus implements PluginListener {
 
+    /**
+     * The default implementation to use for the number representation.
+     */
+    public static final Class<? extends NumberInterface> DEFAULT_NUMBER = NaiveNumber.class;
     /**
      * The file used for saving and loading configuration.
      */
-    public static final File CONFIG_FILE = new File("config.yml");
+    public static final File CONFIG_FILE = new File("config.toml");
 
     /**
      * The main Abacus UI.
@@ -137,9 +143,22 @@ public class Abacus implements PluginListener {
         return tree.reduce(numberReducer);
     }
 
+    public NumberInterface numberFromString(String numberString){
+        Class<? extends NumberInterface> toInstantiate =
+                pluginManager.numberFor(configuration.getNumberImplementation());
+        if(toInstantiate == null) toInstantiate = DEFAULT_NUMBER;
+
+        try {
+            return toInstantiate.getConstructor(String.class).newInstance(numberString);
+        } catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
     @Override
     public void onLoad(PluginManager manager) {
-        treeBuilder = new TreeBuilder();
+        treeBuilder = new TreeBuilder(this);
         for(String function : manager.getAllFunctions()){
             treeBuilder.registerFunction(function);
         }

src/org/nwapw/abacus/config/ConfigurationObject.java

@@ -2,13 +2,9 @@ package org.nwapw.abacus.config;
 
 import com.moandjiezana.toml.Toml;
 import com.moandjiezana.toml.TomlWriter;
-import org.nwapw.abacus.number.NaiveNumber;
 
 import java.io.File;
 import java.io.IOException;
-import java.lang.reflect.InvocationTargetException;
-import java.util.HashMap;
-import java.util.Map;
 
 /**
  * A configuration object, which essentially
@@ -18,10 +14,6 @@ import java.util.Map;
  */
 public class ConfigurationObject {
 
-    /**
-     * The default implementation to use for instantiating numbers.
-     */
-    private static final Class<? extends NaiveNumber> DEFAULT_IMPLEMENTATION = NaiveNumber.class;
     /**
      * The writer used to store the configuration.
      */
@@ -30,11 +22,6 @@ public class ConfigurationObject {
      * The configuration instance being modeled.
      */
     private Configuration configuration;
-    /**
-     * A map of number names to their implementations, which
-     * will be provided by plugins.
-     */
-    private Map<String, Class<? extends NaiveNumber>> numberImplementations;
 
     /**
      * Sets up the ConfigurationObject.
@@ -44,7 +31,6 @@ public class ConfigurationObject {
      */
     private void setup(Configuration configuration){
         this.configuration = configuration;
-        numberImplementations = new HashMap<>();
     }
 
     /**
@@ -58,33 +44,6 @@ public class ConfigurationObject {
         return configuration;
     }
 
-    /**
-     * Register a number implementation.
-     * @param name the name of the number implementation to register the class as.
-     * @param newClass the class that will be used to instantiate the new number.
-     *                 It is required that this class provides a Number(String) constructor.
-     */
-    public void registerImplementation(String name, Class<? extends NaiveNumber> newClass){
-        numberImplementations.put(name, newClass);
-    }
-
-    /**
-     * Creates a new number with the configured type, passing
-     * it the given string.
-     * @param string the string from which the number should be parsed.
-     * @return the resulting number, or null if an error occurred.
-     */
-    public NaiveNumber numberFromString(String string)  {
-        Class<? extends NaiveNumber> toLoad =
-                numberImplementations.getOrDefault(configuration.numberType, DEFAULT_IMPLEMENTATION);
-        try {
-            return toLoad.getConstructor(String.class).newInstance(string);
-        } catch (InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
-            e.printStackTrace();
-        }
-        return null;
-    }
-
     /**
      * Returns the configured, user-requested precision.
      * @return the precision.
@@ -93,6 +52,15 @@ public class ConfigurationObject {
         return configuration.decimalPrecision;
     }
 
+    /**
+     * Returns the implementation the user has requested to
+     * represent their numbers.
+     * @return the implementation name.
+     */
+    public String getNumberImplementation() {
+        return configuration.numberType;
+    }
+
     /**
      * Saves the ConfigurationObject to the given file.
      * @param toFile the file to save ot.

src/org/nwapw/abacus/plugin/Plugin.java

@@ -2,6 +2,7 @@ package org.nwapw.abacus.plugin;
 
 import org.nwapw.abacus.function.Function;
 import org.nwapw.abacus.function.Operator;
+import org.nwapw.abacus.number.NumberInterface;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -24,6 +25,10 @@ public abstract class Plugin {
      * A hash map of operators mapped to their string names.
      */
     private Map<String, Operator> operators;
+    /**
+     * A hash map of operators mapped to their string names.
+     */
+    private Map<String, Class<? extends NumberInterface>> numbers;
     /**
      * The plugin manager in which to search for functions
      * not inside this package,
@@ -44,6 +49,7 @@ public abstract class Plugin {
         this.manager = manager;
         functions = new HashMap<>();
         operators = new HashMap<>();
+        numbers = new HashMap<>();
         enabled = false;
     }
 
@@ -63,6 +69,14 @@ public abstract class Plugin {
         return operators.keySet();
     }
 
+    /**
+     * Gets the list of all numbers provided by this plugin.
+     * @return the list of registered numbers.
+     */
+    public final Set<String> providedNumbers(){
+        return numbers.keySet();
+    }
+
     /**
      * Gets a function under the given function name.
      * @param functionName the name of the function to get
@@ -81,6 +95,15 @@ public abstract class Plugin {
         return operators.get(operatorName);
     }
 
+    /**
+     * Gets the class under the given name.
+     * @param numberName the name of the class.
+     * @return the class, or null if the plugin doesn't provide it.
+     */
+    public final Class<? extends NumberInterface> getNumber(String numberName){
+        return numbers.get(numberName);
+    }
+
     /**
      * Enables the function, loading the necessary instances
      * of functions.
@@ -124,6 +147,18 @@ public abstract class Plugin {
         operators.put(name, operator);
     }
 
+    /**
+     * To be used in load(). Registers a number class
+     * with the plugin internally, which makes it possible
+     * for the user to select it as an "implementation" for the
+     * number that they would like to use.
+     * @param name the name to register it under.
+     * @param toRegister the class to register.
+     */
+    protected final void registerNumber(String name, Class<? extends NumberInterface> toRegister){
+        numbers.put(name, toRegister);
+    }
+
     /**
      * Searches the PluginManager for the given function name.
      * This can be used by the plugins internally in order to call functions

src/org/nwapw/abacus/plugin/PluginManager.java

@@ -3,6 +3,7 @@ package org.nwapw.abacus.plugin;
 import org.nwapw.abacus.Abacus;
 import org.nwapw.abacus.function.Function;
 import org.nwapw.abacus.function.Operator;
+import org.nwapw.abacus.number.NumberInterface;
 
 import java.lang.reflect.InvocationTargetException;
 import java.util.*;
@@ -27,10 +28,15 @@ public class PluginManager {
      */
     private Map<String, Function> cachedFunctions;
     /**
-     * List of operators tha have been cached,
+     * List of operators that have been cached,
      * that is, found in a plugin and returned.
      */
     private Map<String, Operator> cachedOperators;
+    /**
+     * List of registered number implementations that have
+     * been cached, that is, found in a plugin and returned.
+     */
+    private Map<String, Class<? extends NumberInterface>> cachedNumbers;
     /**
      * List of all functions loaded by the plugins.
      */
@@ -39,6 +45,10 @@ public class PluginManager {
      * List of all operators loaded by the plugins.
      */
     private Set<String> allOperators;
+    /**
+     * List of all numbers loaded by the plugins.
+     */
+    private Set<String> allNumbers;
     /**
      * The list of plugin listeners attached to this instance.
      */
@@ -58,8 +68,10 @@ public class PluginManager {
         plugins = new HashSet<>();
         cachedFunctions = new HashMap<>();
         cachedOperators = new HashMap<>();
+        cachedNumbers = new HashMap<>();
         allFunctions = new HashSet<>();
         allOperators = new HashSet<>();
+        allNumbers = new HashSet<>();
         listeners = new HashSet<>();
     }
 
@@ -111,6 +123,15 @@ public class PluginManager {
         return searchCached(plugins, cachedOperators, Plugin::providedOperators, Plugin::getOperator, name);
     }
 
+    /**
+     * Gets a numer implementation under the given name.
+     * @param name the name of the implementation.
+     * @return the implementation class
+     */
+    public Class<? extends NumberInterface> numberFor(String name){
+        return searchCached(plugins, cachedNumbers, Plugin::providedNumbers, Plugin::getNumber, name);
+    }
+
     /**
      * Adds an instance of Plugin that already has been instantiated.
      * @param plugin the plugin to add.
@@ -143,6 +164,7 @@ public class PluginManager {
         for(Plugin plugin : plugins){
             allFunctions.addAll(plugin.providedFunctions());
             allOperators.addAll(plugin.providedOperators());
+            allNumbers.addAll(plugin.providedNumbers());
         }
         listeners.forEach(e -> e.onLoad(this));
     }
@@ -154,6 +176,7 @@ public class PluginManager {
         for(Plugin plugin : plugins) plugin.disable();
         allFunctions.clear();
         allOperators.clear();
+        allNumbers.clear();
         listeners.forEach(e -> e.onUnload(this));
     }
 
@@ -181,6 +204,14 @@ public class PluginManager {
         return allOperators;
     }
 
+    /**
+     * Gets all the number implementations loaded by the Plugin Manager
+     * @return the set of all implementations that were loaded
+     */
+    public Set<String> getAllNumbers() {
+        return allNumbers;
+    }
+
     /**
      * Adds a plugin change listener to this plugin manager.
      * @param listener the listener to add.

src/org/nwapw/abacus/plugin/StandardPlugin.java

@@ -6,6 +6,7 @@ import org.nwapw.abacus.function.OperatorAssociativity;
 import org.nwapw.abacus.function.OperatorType;
 import org.nwapw.abacus.number.NaiveNumber;
 import org.nwapw.abacus.number.NumberInterface;
+import org.nwapw.abacus.number.PreciseNumber;
 
 import java.util.function.BiFunction;
 
@@ -21,6 +22,9 @@ public class StandardPlugin extends Plugin {
 
     @Override
     public void onEnable() {
+        registerNumber("naive", NaiveNumber.class);
+        registerNumber("precise", PreciseNumber.class);
+
         registerOperator("+", new Operator(OperatorAssociativity.LEFT, OperatorType.BINARY_INFIX, 0, new Function() {
             @Override
             protected boolean matchesParams(NumberInterface[] params) {

src/org/nwapw/abacus/tree/TreeBuilder.java

@@ -1,12 +1,11 @@
 package org.nwapw.abacus.tree;
 
+import org.nwapw.abacus.Abacus;
 import org.nwapw.abacus.function.OperatorAssociativity;
 import org.nwapw.abacus.function.OperatorType;
 import org.nwapw.abacus.lexing.Lexer;
 import org.nwapw.abacus.lexing.pattern.Match;
 import org.nwapw.abacus.lexing.pattern.Pattern;
-import org.nwapw.abacus.number.NaiveNumber;
-import org.nwapw.abacus.number.PreciseNumber;
 
 import java.util.*;
 
@@ -31,6 +30,11 @@ public class TreeBuilder {
      * The map of operator types.
      */
     private Map<String, OperatorType> typeMap;
+    /**
+     * The abacus instance required to interact with
+     * other components of the calculator.
+     */
+    private Abacus abacus;
 
     /**
      * Comparator used to sort token types.
@@ -40,7 +44,8 @@ public class TreeBuilder {
     /**
      * Creates a new TreeBuilder.
      */
-    public TreeBuilder(){
+    public TreeBuilder(Abacus abacus){
+        this.abacus = abacus;
         lexer = new Lexer<TokenType>(){{
             register(" ", TokenType.WHITESPACE);
             register(",", TokenType.COMMA);
@@ -172,7 +177,7 @@ public class TreeBuilder {
                 else return new UnaryPrefixNode(operator, applyTo);
             }
         } else if(matchType == TokenType.NUM){
-            return new NumberNode(new NaiveNumber(Double.parseDouble(source.substring(match.getFrom(), match.getTo()))));
+            return new NumberNode(abacus.numberFromString(source.substring(match.getFrom(), match.getTo())));
         } else if(matchType == TokenType.FUNCTION){
             String functionName = source.substring(match.getFrom(), match.getTo());
             FunctionNode node = new FunctionNode(functionName);