75 lines
2.5 KiB
Java
75 lines
2.5 KiB
Java
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package org.warp.picalculator.math.rules;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.FileReader;
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import java.io.IOException;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.script.ScriptEngine;
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import javax.script.ScriptEngineManager;
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import javax.script.ScriptException;
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import org.warp.picalculator.StaticVars;
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import org.warp.picalculator.math.MathContext;
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import org.warp.picalculator.math.functions.Subtraction;
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import org.warp.picalculator.math.functions.Sum;
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import org.warp.picalculator.math.functions.SumSubtraction;
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import org.warp.picalculator.math.functions.Variable;
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import org.warp.picalculator.math.functions.Variable.V_TYPE;
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import it.unimi.dsi.fastutil.objects.ObjectArrayList;
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public class RulesManager {
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public static ObjectArrayList<Rule>[] rules;
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private RulesManager() {
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}
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@SuppressWarnings("unchecked")
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public static void initialize() {
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rules = new ObjectArrayList[RuleType.values().length];
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for (RuleType val : RuleType.values()) {
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rules[val.ordinal()] = new ObjectArrayList<Rule>();
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}
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try {
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final Path rulesPath = Paths.get(StaticVars.classLoader.getResource("rules.csv").toURI());
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if (!Files.exists(rulesPath)) {
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throw new FileNotFoundException("rules.csv not found!");
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}
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ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
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List<String> ruleLines = Files.readAllLines(rulesPath);
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for (String rulesLine : ruleLines) {
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String[] ruleDetails = rulesLine.split(",", 1);
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String ruleName = ruleDetails[0];
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URL resourceURL = StaticVars.classLoader.getResource("rules" + File.separator + ruleName.replace("/", "_") + ".js");
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if (resourceURL == null) {
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throw new FileNotFoundException("rules/" + ruleName + ".js not found!");
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}
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Path rulePath = Paths.get(resourceURL.toURI());
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engine.eval(new FileReader(rulePath.toString()));
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}
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} catch (URISyntaxException | IOException e) {
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e.printStackTrace();
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System.exit(1);
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} catch (ScriptException e) {
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e.printStackTrace();
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}
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System.exit(0);
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}
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public static void addRule(Rule rule) {
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MathContext mc = new MathContext();
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System.out.println(rule.execute(new SumSubtraction(mc, null, new Sum(mc, new Variable(mc, 'x', V_TYPE.VARIABLE), new Variable(mc, 'y', V_TYPE.VARIABLE)))));
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System.out.println(rule.getRuleName());
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}
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}
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