217 lines
8.9 KiB
Java
217 lines
8.9 KiB
Java
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.IOException;
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import java.io.InputStream;
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import java.io.PrintWriter;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.net.URLClassLoader;
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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.nio.file.StandardOpenOption;
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import java.util.List;
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import org.warp.picalculator.Error;
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import org.warp.picalculator.Utils;
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import org.warp.picalculator.math.Function;
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import org.warp.picalculator.math.MathContext;
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import org.warp.picalculator.math.functions.Expression;
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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 org.warp.picalculator.math.solver.MathSolver;
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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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Utils.out.println(Utils.OUTPUTLEVEL_NODEBUG, "RulesManager", "Loading the rules");
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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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boolean compiledSomething = false;
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final Path rulesPath = Utils.getResource("/rules.csv");
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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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List<String> ruleLines = Files.readAllLines(rulesPath);
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ruleLines.remove(0); //Remove the headers
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boolean useCache = false;
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Path tDir = Paths.get(System.getProperty("java.io.tmpdir"), "WarpPi-Calculator").resolve("rules-rt");
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// try {
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// final Path defaultResource = Utils.getResource("/math-rules-cache.zip");
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// }
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Path cacheFilePath = Utils.getResource("/math-rules-cache.zip");//Paths.get(Utils.getJarDirectory().toString()).resolve("math-rules-cache.zip").toAbsolutePath();
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if (cacheFilePath.toFile().exists()) {
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try {
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if (tDir.toFile().exists()) {
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tDir.toFile().delete();
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}
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Utils.unzip(cacheFilePath.toString(), tDir.getParent().toString(), "");
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useCache = !Utils.debugCache;
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} catch (Exception ex) {
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ex.printStackTrace();
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}
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}
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for (String rulesLine : ruleLines) {
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if (rulesLine.length() > 0) {
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String[] ruleDetails = rulesLine.split(",", 1);
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String ruleName = ruleDetails[0];
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String ruleNameEscaped = ruleName.replace(".", "_");
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Utils.out.println(Utils.OUTPUTLEVEL_NODEBUG, "RulesManager", "Evaluating /rules/" + ruleNameEscaped + ".java");
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String pathWithoutExtension = "/rules/" + ruleNameEscaped;
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String scriptFile = pathWithoutExtension + ".java";
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InputStream resourcePath = Utils.getResourceStream(scriptFile);
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if (resourcePath == null) {
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System.err.println(new FileNotFoundException("/rules/" + ruleName + ".java not found!"));
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} else {
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Rule r = null;
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if (useCache) {
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try {
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Utils.out.println(Utils.OUTPUTLEVEL_DEBUG_MIN, "RulesManager", ruleName, "Trying to load cached rule");
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r = loadClassRuleFromSourceFile(scriptFile, tDir);
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if (r != null) {
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Utils.out.println(Utils.OUTPUTLEVEL_DEBUG_MIN, "RulesManager", ruleName, "Loaded cached rule");
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}
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} catch (Exception e) {
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e.printStackTrace();
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Utils.out.println(Utils.OUTPUTLEVEL_NODEBUG, "RulesManager", ruleName, "Can't load the rule!");
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}
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}
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if (r == null || !useCache) {
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Utils.out.println(Utils.OUTPUTLEVEL_DEBUG_MIN, "RulesManager", ruleName, "This rule is not cached. Compiling");
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try {
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r = compileJavaRule(scriptFile, tDir);
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compiledSomething = true;
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} catch (InstantiationException | IllegalAccessException | ClassNotFoundException | IOException e) {
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e.printStackTrace();
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}
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}
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if (r != null) {
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RulesManager.addRule(r);
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}
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}
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}
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}
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Utils.out.println(Utils.OUTPUTLEVEL_NODEBUG, "RulesManager", "Loaded all the rules successfully");
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if (compiledSomething) {
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if (cacheFilePath.toFile().exists()) {
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cacheFilePath.toFile().delete();
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}
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Utils.zip(tDir.toString(), cacheFilePath.toString(), "");
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Utils.out.println(Utils.OUTPUTLEVEL_NODEBUG, "RulesManager", "Cached the compiled rules");
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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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}
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}
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public static Rule compileJavaRule(String scriptFile, Path tDir) throws IOException, URISyntaxException, InstantiationException, IllegalAccessException, ClassNotFoundException {
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InputStream resource = Utils.getResourceStream(scriptFile);
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String text = Utils.read(resource);
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String[] textArray = text.split("\\n", 5);
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String javaClassDeclaration = textArray[2].substring(6);
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int extIndex = javaClassDeclaration.lastIndexOf('.');
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String javaClassNameOnly = javaClassDeclaration.substring(extIndex + 1, javaClassDeclaration.length());
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String javaClassNameAndPath = new StringBuilder("org.warp.picalculator.math.rules.").append(javaClassDeclaration).toString();
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extIndex = javaClassNameAndPath.lastIndexOf('.');
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String javaCode = new StringBuilder("package ").append(javaClassNameAndPath.substring(0, extIndex >= 0 ? extIndex : javaClassNameAndPath.length())).append(";\n")
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.append(textArray[4]).toString();
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Path tDirPath = tDir.resolve(javaClassNameAndPath.replace('.', File.separatorChar)).getParent();
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Path tFileJava = tDirPath.resolve(javaClassNameOnly + ".java");
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Path tFileClass = tDirPath.resolve(javaClassNameOnly + ".class");
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if (!tDirPath.toFile().exists()) {
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Files.createDirectories(tDirPath);
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}
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if (tFileJava.toFile().exists()) {
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tFileJava.toFile().delete();
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}
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Files.write(tFileJava, javaCode.getBytes("UTF-8"), StandardOpenOption.WRITE, StandardOpenOption.CREATE);
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boolean compiled = org.eclipse.jdt.internal.compiler.batch.Main.compile(new String[] {"-nowarn", "-1.8", tFileJava.toString()}, new PrintWriter(System.out), new PrintWriter(System.err), null);
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if (Utils.debugCache) {
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tFileJava.toFile().deleteOnExit();
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} else {
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tFileJava.toFile().delete();
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}
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if (compiled) {
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tFileClass.toFile().deleteOnExit();
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return loadClassRuleDirectly(javaClassNameAndPath, tDir);
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} else {
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throw new IOException("Can't build script file '" + scriptFile + "'");
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}
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}
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public static Rule loadClassRuleFromSourceFile(String scriptFile, Path tDir) throws IOException, URISyntaxException, InstantiationException, IllegalAccessException, ClassNotFoundException {
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InputStream resource = Utils.getResourceStream(scriptFile);
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String text = Utils.read(resource);
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String[] textArray = text.split("\\n", 5);
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String javaClassName = textArray[2].substring(6);
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String javaClassNameAndPath = new StringBuilder("org.warp.picalculator.math.rules.").append(javaClassName).toString();
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try {
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return loadClassRuleDirectly(javaClassNameAndPath, tDir);
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} catch (Exception ex) {
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ex.printStackTrace();
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return null;
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}
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}
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public static Rule loadClassRuleDirectly(String javaClassNameAndPath, Path tDir) throws IOException, URISyntaxException, InstantiationException, IllegalAccessException, ClassNotFoundException {
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URLClassLoader cl = new URLClassLoader(new URL[] {tDir.toUri().toURL()});
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Class<?> aClass = cl.loadClass(javaClassNameAndPath);
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cl.close();
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return (Rule) aClass.newInstance();
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}
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public static void warmUp() throws Error, InterruptedException {
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ObjectArrayList<Function> uselessResult = null;
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boolean uselessVariable = false;
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for (RuleType val : RuleType.values()) {
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final ObjectArrayList<Rule> ruleList = rules[val.ordinal()];
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for (final Rule rule : ruleList) {
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String ruleName = "<null>";
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try {
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ruleName = rule.getRuleName();
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ObjectArrayList<Function> uselessResult2 = rule.execute(generateUselessExpression());
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uselessVariable = (uselessResult == null ? new ObjectArrayList<>() : uselessResult).equals(uselessResult2);
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uselessResult = uselessResult2;
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} catch (Exception e) {
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if (uselessVariable || true) {
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System.err.println("Exception thrown by rule '" + ruleName + "'!");
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e.printStackTrace();
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}
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}
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}
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}
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try {
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new MathSolver(generateUselessExpression()).solveAllSteps();
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} catch (InterruptedException | Error e) {
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e.printStackTrace();
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}
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}
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private static Function generateUselessExpression() {
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MathContext mc = new MathContext();
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Function expr = new Expression(mc);
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expr = expr.setParameter(0, new Variable(mc, 'x', V_TYPE.VARIABLE));
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return expr;
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}
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public static void addRule(Rule rule) {
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rules[rule.getRuleType().ordinal()].add(rule);
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Utils.out.println(Utils.OUTPUTLEVEL_NODEBUG, "RulesManager", rule.getRuleName(), "Loaded as " + rule.getRuleType() + " rule");
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}
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}
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