package org.nwapw.abacus; import org.nwapw.abacus.config.ConfigurationObject; import org.nwapw.abacus.function.Operator; import org.nwapw.abacus.number.NumberInterface; import org.nwapw.abacus.plugin.ClassFinder; import org.nwapw.abacus.plugin.PluginListener; import org.nwapw.abacus.plugin.PluginManager; import org.nwapw.abacus.plugin.StandardPlugin; import org.nwapw.abacus.tree.NumberReducer; import org.nwapw.abacus.tree.TreeBuilder; import org.nwapw.abacus.tree.TreeNode; import org.nwapw.abacus.window.Window; import javax.swing.*; import java.io.File; import java.io.IOException; /** * The main calculator class. This is responsible * for piecing together all of the components, allowing * their interaction with each other. */ public class Abacus implements PluginListener { /** * The file used for saving and loading configuration. */ public static final File CONFIG_FILE = new File("config.yml"); /** * The main Abacus UI. */ private Window mainUi; /** * The plugin manager responsible for * loading and unloading plugins, * and getting functions from them. */ private PluginManager pluginManager; /** * Tree builder built from plugin manager, * used to construct parse trees. */ private TreeBuilder treeBuilder; /** * The reducer used to evaluate the tree. */ private NumberReducer numberReducer; /** * The configuration loaded from a file. */ private ConfigurationObject configuration; /** * Creates a new instance of the Abacus calculator. */ public Abacus(){ pluginManager = new PluginManager(this); mainUi = new Window(this); numberReducer = new NumberReducer(this); configuration = new ConfigurationObject(CONFIG_FILE); configuration.save(CONFIG_FILE); pluginManager.addListener(this); pluginManager.addInstantiated(new StandardPlugin(pluginManager)); try { ClassFinder.loadJars("plugins") .forEach(plugin -> pluginManager.addClass(plugin)); } catch (IOException | ClassNotFoundException e) { e.printStackTrace(); } pluginManager.load(); mainUi.setVisible(true); } /** * Gets the current tree builder. * @return the main tree builder in this abacus instance. */ public TreeBuilder getTreeBuilder() { return treeBuilder; } /** * Gets the current plugin manager, * @return the plugin manager in this abacus instance. */ public PluginManager getPluginManager() { return pluginManager; } /** * Gets the current UI. * @return the UI window in this abacus instance. */ public Window getMainUi() { return mainUi; } /** * Get the reducer that is responsible for transforming * an expression into a number. * @return the number reducer in this abacus instance. */ public NumberReducer getNumberReducer() { return numberReducer; } /** * Gets the configuration object associated with this instance. * @return the configuration object. */ public ConfigurationObject getConfiguration() { return configuration; } /** * Parses a string into a tree structure using the main * tree builder. * @param input the input string to parse * @return the resulting tree, null if the tree builder or the produced tree are null. */ public TreeNode parseString(String input){ if(treeBuilder == null) return null; return treeBuilder.fromString(input); } /** * Evaluates the given tree using the main * number reducer. * @param tree the tree to reduce, must not be null. * @return the resulting number, or null of the reduction failed. */ public NumberInterface evaluateTree(TreeNode tree){ return tree.reduce(numberReducer); } @Override public void onLoad(PluginManager manager) { treeBuilder = new TreeBuilder(); for(String function : manager.getAllFunctions()){ treeBuilder.registerFunction(function); } for(String operator : manager.getAllOperators()){ Operator operatorObject = manager.operatorFor(operator); treeBuilder.registerOperator(operator, operatorObject.getAssociativity(), operatorObject.getType(), operatorObject.getPrecedence()); } } @Override public void onUnload(PluginManager manager) { treeBuilder = null; } public static void main(String[] args){ try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | UnsupportedLookAndFeelException | IllegalAccessException e) { e.printStackTrace(); } new Abacus(); } }