package org.nwapw.abacus; import org.nwapw.abacus.config.Configuration; import org.nwapw.abacus.fx.AbacusApplication; import org.nwapw.abacus.number.NumberInterface; import org.nwapw.abacus.parsing.LexerTokenizer; import org.nwapw.abacus.parsing.ShuntingYardParser; import org.nwapw.abacus.parsing.TreeBuilder; import org.nwapw.abacus.plugin.NumberImplementation; import org.nwapw.abacus.plugin.PluginManager; import org.nwapw.abacus.plugin.StandardPlugin; import org.nwapw.abacus.tree.NumberReducer; import org.nwapw.abacus.tree.TreeNode; import java.io.File; /** * The main calculator class. This is responsible * for piecing together all of the components, allowing * their interaction with each other. */ public class Abacus { /** * The default number implementation to be used if no other one is available / selected. */ public static final NumberImplementation DEFAULT_IMPLEMENTATION = StandardPlugin.IMPLEMENTATION_NAIVE; /** * The file used for saving and loading configuration. */ public static final File CONFIG_FILE = new File("config.toml"); /** * The plugin manager responsible for * loading and unloading plugins, * and getting functions from them. */ private PluginManager pluginManager; /** * The reducer used to evaluate the tree. */ private NumberReducer numberReducer; /** * The configuration loaded from a file. */ private Configuration configuration; /** * The tree builder used to construct a tree * from a string. */ private TreeBuilder treeBuilder; /** * Creates a new instance of the Abacus calculator. */ public Abacus() { pluginManager = new PluginManager(this); numberReducer = new NumberReducer(this); configuration = new Configuration(CONFIG_FILE); configuration.saveTo(CONFIG_FILE); LexerTokenizer lexerTokenizer = new LexerTokenizer(); ShuntingYardParser shuntingYardParser = new ShuntingYardParser(this); treeBuilder = new TreeBuilder<>(lexerTokenizer, shuntingYardParser); pluginManager.addListener(shuntingYardParser); pluginManager.addListener(lexerTokenizer); } public static void main(String[] args) { AbacusApplication.launch(AbacusApplication.class, args); } /** * 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; } /** * 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 Configuration 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) { 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); } /** * Creates a number from a string. * * @param numberString the string to create the number from. * @return the resulting number. */ public NumberInterface numberFromString(String numberString) { NumberImplementation toInstantiate = pluginManager.numberImplementationFor(configuration.getNumberImplementation()); if (toInstantiate == null) toInstantiate = DEFAULT_IMPLEMENTATION; return toInstantiate.instanceForString(numberString); } }