Thoughts on how to do the modloading properly
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parent
0cc2bc1923
commit
62cca5a4b7
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package fml;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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@Retention(RetentionPolicy.RUNTIME)
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public @interface Mod {
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String name() default "";
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String version() default "";
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boolean wantsPreInit() default false;
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boolean wantsPostInit() default false;
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public @interface PreInit {}
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public @interface Init {}
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public @interface PostInit {}
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}
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package fml.server;
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import fml.Mod;
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public class FMLModContainer implements ModContainer {
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private Mod modDescriptor;
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private Object modInstance;
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public FMLModContainer(Class<?> clazz) {
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modDescriptor=clazz.getAnnotation(Mod.class);
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try {
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modInstance=clazz.newInstance();
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public boolean wantsPreInit() {
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return modDescriptor.wantsPreInit();
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}
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@Override
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public boolean wantsPostInit() {
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return modDescriptor.wantsPostInit();
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}
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@Override
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public void preInit() {
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}
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@Override
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public void init() {
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// TODO Auto-generated method stub
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}
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@Override
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public void postInit() {
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// TODO Auto-generated method stub
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}
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public static ModContainer buildFor(Class<?> clazz) {
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return new FMLModContainer(clazz);
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}
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}
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package fml.server;
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import java.io.File;
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import java.io.FilenameFilter;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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import java.util.logging.Logger;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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import fml.Mod;
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import fml.stubs.mcpserver.BaseMod;
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public class Loader {
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private enum State { NOINIT, LOADING, PREINIT, INIT, POSTINIT, UP, ERRORED };
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private static State state;
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private static Logger LOG = Logger.getLogger("ForgeModLoader.Loader");
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private static List<ModContainer> mods;
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private static ModClassLoader modClassLoader;
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private static Pattern zipJar = Pattern.compile("([\\w]+).(zip|jar)$");
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private static Pattern modClass = Pattern.compile("(.*)(mod_[^\\s]+)\\.class$");
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public static Loader instance;
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public static void run() {
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instance=new Loader();
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}
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private Loader() {
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state=State.NOINIT;
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load();
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preModInit();
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modInit();
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postModInit();
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state=State.UP;
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}
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private void preModInit() {
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state=State.PREINIT;
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for (ModContainer mod : mods) {
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if (mod.wantsPreInit()) {
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mod.preInit();
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}
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}
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}
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private void modInit() {
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state=State.INIT;
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for (ModContainer mod : mods) {
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mod.init();
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}
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}
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private void postModInit() {
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state=State.POSTINIT;
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for (ModContainer mod : mods) {
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if (mod.wantsPostInit()) {
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mod.postInit();
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}
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}
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}
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private void load() {
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File modsDir = new File(".", "mods");
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String canonicalModsPath;
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try {
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canonicalModsPath = modsDir.getCanonicalPath();
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} catch (IOException ioe) {
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LOG.severe(String.format("Failed to resolve mods directory mods %s",modsDir.getAbsolutePath()));
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LOG.throwing("fml.server.Loader", "initialize", ioe);
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throw new LoaderException(ioe);
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}
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if (!modsDir.exists()) {
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LOG.fine(String.format("No mod directory found, creating one: %s", canonicalModsPath));
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try {
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modsDir.mkdir();
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} catch (Exception e) {
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LOG.throwing("fml.server.Loader", "initialize", e);
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throw new LoaderException(e);
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}
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}
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if (!modsDir.isDirectory()) {
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LOG.severe(String.format("Attempting to load mods from %s, which is not a directory", canonicalModsPath));
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LoaderException loaderException = new LoaderException();
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LOG.throwing("fml.server.Loader", "initialize", loaderException);
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throw loaderException;
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}
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File[] modList = modsDir.listFiles();
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// Sort the files into alphabetical order first
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Arrays.sort(modList);
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state=State.LOADING;
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for (File modFile : modList) {
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if (modFile.isDirectory()) {
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LOG.info(String.format("Found directory %s. Attempting load", modFile.getName()));
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attemptDirLoad(modFile);
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} else {
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Matcher matcher = zipJar.matcher(modFile.getName());
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if (matcher.find()) {
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LOG.info(String.format("Found zip or jar file %s. Attempting load.", matcher.group(0)));
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attemptFileLoad(modFile);
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}
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}
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}
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if (state==State.ERRORED) {
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LOG.severe("A problem has occured during mod loading. Giving up now");
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throw new RuntimeException("Giving up please");
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}
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}
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private void attemptDirLoad(File modDir) {
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extendClassLoader(modDir);
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File[] content=modDir.listFiles(new FilenameFilter() {
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@Override
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public boolean accept(File dir, String name) {
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return modClass.matcher(name).find();
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}
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});
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for (File modClassFile : content) {
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LOG.fine(String.format("Found a mod class %s in directory %s. Attempting to load it",modClassFile.getName(),modDir.getName()));
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String clazzName=modClass.matcher(modClassFile.getName()).group(2);
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loadModClass(modDir, modClassFile.getName(), clazzName);
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LOG.fine(String.format("Successfully loaded mod class %s",modClassFile.getName()));
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}
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}
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private void loadModClass(File classSource, String classFileName, String clazzName) {
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try {
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Class<?> clazz=Class.forName(clazzName,true,modClassLoader);
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if (clazz.isAnnotationPresent(Mod.class)) {
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// an FML mod
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mods.add(FMLModContainer.buildFor(clazz));
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} else if (clazz.isAssignableFrom(BaseMod.class)) {
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// a modloader mod
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} else {
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// Unrecognized
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}
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} catch (ClassNotFoundException e) {
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LOG.warning(String.format("Failed to load mod class %s in %s",classFileName,classSource.getName()));
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LOG.throwing("fml.server.Loader", "attemptDirLoad", e);
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state=State.ERRORED;
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}
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}
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private void extendClassLoader(File file) {
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if (modClassLoader==null) {
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modClassLoader=new ModClassLoader();
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}
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try {
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modClassLoader.addFile(file);
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} catch (MalformedURLException e) {
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throw new LoaderException(e);
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}
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}
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private void attemptFileLoad(File modFile) {
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extendClassLoader(modFile);
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try {
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ZipFile jar=new ZipFile(modFile);
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for (ZipEntry ze : Collections.list(jar.entries())) {
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Matcher match=modClass.matcher(ze.getName());
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if (match.find()) {
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String pkg=match.group(1).replace('/', '.');
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String clazzName=pkg+match.group(2);
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loadModClass(modFile, ze.getName(), clazzName);
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}
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}
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} catch (Exception e) {
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LOG.warning(String.format("Zip file %s failed to read properly", modFile.getName()));
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LOG.throwing("fml.server.Loader", "attemptFileLoad", e);
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state=State.ERRORED;
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}
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}
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class LoaderException extends RuntimeException {
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public LoaderException(Exception wrapped) {
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super(wrapped);
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}
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public LoaderException() {
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}
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}
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}
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@ -0,0 +1,18 @@
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package fml.server;
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import java.io.File;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLClassLoader;
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public class ModClassLoader extends URLClassLoader {
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public ModClassLoader() {
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super(new URL[0]);
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}
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public void addFile(File modFile) throws MalformedURLException {
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URL url=modFile.toURI().toURL();
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super.addURL(url);
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}
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}
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@ -0,0 +1,9 @@
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package fml.server;
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public interface ModContainer {
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boolean wantsPreInit();
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boolean wantsPostInit();
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void preInit();
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void init();
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void postInit();
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}
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package fml.server;
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public class ModLoaderModContainer implements ModContainer {
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public boolean wantsPreInit() {
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return false;
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}
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public boolean wantsPostInit() {
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return false;
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}
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@Override
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public void preInit() {
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// TODO Auto-generated method stub
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}
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@Override
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public void init() {
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// TODO Auto-generated method stub
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}
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@Override
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public void postInit() {
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// TODO Auto-generated method stub
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}
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}
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@ -2,12 +2,16 @@ package fml.stubs.mcpserver;
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import java.util.Random;
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import fml.Mod;
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import net.minecraft.src.EntityPlayer;
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import net.minecraft.src.IInventory;
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import net.minecraft.src.ItemStack;
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import net.minecraft.src.Packet250CustomPayload;
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import net.minecraft.src.World;
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@Mod(name="blah",version="blah")
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public interface BaseMod {
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int addFuel(int id, int metadata);
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abstract String getVersion();
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// void keyboardEvent(KeyBinding event);
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@Mod.PreInit
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abstract void load();
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@Mod.Init
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void modsLoaded();
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void onItemPickup(EntityPlayer player, ItemStack item);
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