/*
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neon - Embeddable HTTP Server based on jdk.httpserver
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Copyright (C) 2024 Ulrich Hilger
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package de.uhilger.neon;
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import java.io.File;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.net.URI;
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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.util.Enumeration;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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/**
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* Die Klasse JarScanner enthaelt Methoden, um fuer eine Klasse zu bestimmen, in
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* welcher JAR-Datei sie liegt und diese JAR-Datei nach Klassen zu durchsuchen.
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*
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* @author Ulrich Hilger
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* @version 0.1, 30.11.2024
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*/
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public class JarScanner {
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public void processZipContent(ClassLoader urlCL, File archive, String packageName, JarScannerListener l, Handler h, String contextName) {
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try {
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ZipFile zipfile = new ZipFile(archive);
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Enumeration en = zipfile.entries();
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while (en.hasMoreElements()) {
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ZipEntry zipentry = (ZipEntry) en.nextElement();
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if (!zipentry.isDirectory()) {
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processZipEntry(urlCL, zipentry, packageName, l, h, contextName);
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} else {
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// ZIP-Dir muss nicht bearbeitet werden
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}
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}
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zipfile.close();
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} catch (IOException ex) {
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log(Level.SEVERE, ex.getLocalizedMessage());
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}
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}
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private void processZipEntry(ClassLoader urlCL, ZipEntry zipentry, String packageName, JarScannerListener l, Handler h, String contextName) {
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finest(zipentry.getName());
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String zName = zipentry.getName();
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if (zName.toLowerCase().endsWith(".class")) {
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int pos = zName.indexOf(".class");
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String fullClassName = zName.substring(0, pos);
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finest("full class name: " + zName);
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String fullClassNameDots = fullClassName.replace('/', '.');
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finest("full class name dots: " + fullClassNameDots);
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String pkgName = getPackageName(fullClassNameDots);
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finest(" -- package name: " + pkgName);
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if (null != urlCL && pkgName.toLowerCase().startsWith(packageName)) {
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Class c = null;
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try {
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c = urlCL.loadClass(fullClassNameDots);
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if (c != null) {
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if (c.isAnnotationPresent(Actor.class)) {
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finest(" ---- ACTOR ---- " + fullClassNameDots);
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l.actorFound(c, h, contextName);
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} else {
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finest("kein Actor " + fullClassNameDots);
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}
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} else {
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finest("class NOT loaded: " + zName);
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}
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} catch (ClassNotFoundException ex) {
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finest(" +++++ Class not found: " + ex.getMessage());
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}
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}
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}
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}
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private String getPackageName(String fullClassName) {
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String packageName;
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int pos = fullClassName.lastIndexOf(".");
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if (pos > 0) {
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packageName = fullClassName.substring(0, pos);
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} else {
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packageName = fullClassName;
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}
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return packageName;
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}
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public ClassLoader getUrlClassLoader(Class c) {
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URL url;
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ClassLoader urlCL = null;
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try {
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url = getPath(c).toURL();
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finer("url: " + url.getPath());
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urlCL = new URLClassLoader(new URL[]{url});
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} catch (URISyntaxException ex) {
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log(Level.SEVERE, ex.getMessage());
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} catch (MalformedURLException ex) {
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log(Level.SEVERE, ex.getMessage());
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} finally {
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return urlCL;
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}
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}
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public URI getPath(Class c) throws URISyntaxException {
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//Class c = this.getClass();
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String className = c.getName();
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finest("this name: " + className);
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int pos = className.indexOf(".class");
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if(pos > -1) {
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String classNameWoExt = className.substring(0, pos);
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}
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String classNameWoPkg = className.substring(className.lastIndexOf(".") + 1);
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finest("Class name: " + classNameWoPkg);
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String classPath = c.getResource(classNameWoPkg + ".class").getPath();
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pos = classPath.indexOf("!");
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String jarPath;
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if(pos > -1) {
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jarPath = /*"jar:" + */ classPath.substring(0, pos);
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} else {
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jarPath = classPath;
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}
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finest("path: " + jarPath);
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return new URI(jarPath);
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}
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private void finest(String msg) {
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log(Level.FINEST, msg);
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}
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private void finer(String msg) {
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log(Level.FINER, msg);
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}
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private void log(Level l, String msg) {
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Logger.getLogger(JarScanner.class.getName()).log(l, msg);
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}
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public interface JarScannerListener {
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public void actorFound(Class actorClass, Handler h, String contextName);
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}
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}
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