LiteLoaderEnumerator.java
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/*
* This file is part of LiteLoader.
* Copyright (C) 2012-16 Adam Mummery-Smith
* All Rights Reserved.
*/
package com.mumfrey.liteloader.core;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.spongepowered.asm.mixin.MixinEnvironment;
import org.spongepowered.asm.mixin.MixinEnvironment.Phase;
import org.spongepowered.asm.mixin.Mixins;
import com.google.common.base.Throwables;
import com.mumfrey.liteloader.LiteMod;
import com.mumfrey.liteloader.api.ContainerRegistry;
import com.mumfrey.liteloader.api.ContainerRegistry.DisabledReason;
import com.mumfrey.liteloader.api.EnumerationObserver;
import com.mumfrey.liteloader.api.EnumeratorModule;
import com.mumfrey.liteloader.api.EnumeratorPlugin;
import com.mumfrey.liteloader.api.LiteAPI;
import com.mumfrey.liteloader.api.ModClassValidator;
import com.mumfrey.liteloader.core.api.DefaultClassValidator;
import com.mumfrey.liteloader.core.api.DefaultEnumeratorPlugin;
import com.mumfrey.liteloader.core.event.HandlerList;
import com.mumfrey.liteloader.interfaces.FastIterableDeque;
import com.mumfrey.liteloader.interfaces.Injectable;
import com.mumfrey.liteloader.interfaces.Loadable;
import com.mumfrey.liteloader.interfaces.LoadableMod;
import com.mumfrey.liteloader.interfaces.LoaderEnumerator;
import com.mumfrey.liteloader.interfaces.MixinContainer;
import com.mumfrey.liteloader.interfaces.TweakContainer;
import com.mumfrey.liteloader.launch.ClassTransformerManager;
import com.mumfrey.liteloader.launch.LiteLoaderTweaker;
import com.mumfrey.liteloader.launch.LoaderEnvironment;
import com.mumfrey.liteloader.launch.LoaderProperties;
import com.mumfrey.liteloader.util.log.LiteLoaderLogger;
import com.mumfrey.liteloader.util.log.LiteLoaderLogger.Verbosity;
import net.minecraft.launchwrapper.Launch;
import net.minecraft.launchwrapper.LaunchClassLoader;
/**
* The enumerator performs all mod discovery functions for LiteLoader, this
* includes locating mod files to load as well as searching for mod classes
* within the class path and discovered mod files.
*
* @author Adam Mummery-Smith
*/
public class LiteLoaderEnumerator implements LoaderEnumerator
{
public enum EnumeratorState
{
INIT(null),
DISCOVER(INIT),
INJECT(DISCOVER),
REGISTER(INJECT),
FINALISED(REGISTER);
private final EnumeratorState previousState;
private EnumeratorState(EnumeratorState previousState)
{
this.previousState = previousState;
}
public boolean checkGotoState(EnumeratorState fromState)
{
if (fromState != this && fromState != this.previousState)
{
throw new IllegalStateException("Attempted to move to an invalid enumerator state " + this + ", expected to be in state "
+ this.previousState + " but current state is " + fromState);
}
return true;
}
}
private final LoaderEnvironment environment;
private final LoaderProperties properties;
/**
* Reference to the launch classloader
*/
private final LaunchClassLoader classLoader;
/**
*
*/
private final List<EnumeratorModule> modules = new ArrayList<EnumeratorModule>();
private final List<EnumeratorPlugin> plugins = new ArrayList<EnumeratorPlugin>();
private final ContainerRegistry containers = new Containers();
/**
* Containers which have already been checked for potential mod candidates
*/
private final Set<LoadableMod<?>> enumeratedContainers = new HashSet<LoadableMod<?>>();
/**
* Classes to load, mapped by class name
*/
private final Set<ModInfo<LoadableMod<?>>> modsToLoad = new LinkedHashSet<ModInfo<LoadableMod<?>>>();
private final ModClassValidator validator;
private final FastIterableDeque<EnumerationObserver> observers = new HandlerList<EnumerationObserver>(EnumerationObserver.class);
protected EnumeratorState state = EnumeratorState.INIT;
/**
* @param environment
* @param properties
* @param classLoader
*/
public LiteLoaderEnumerator(LoaderEnvironment environment, LoaderProperties properties, LaunchClassLoader classLoader)
{
this.environment = environment;
this.properties = properties;
this.classLoader = classLoader;
this.validator = this.getValidator(environment);
this.initModules(environment);
this.registerPlugin(new DefaultEnumeratorPlugin());
// Initialise observers
this.observers.addAll(environment.getAPIAdapter().getPreInitObservers(EnumerationObserver.class));
// Initialise the shared mod list if we haven't already
this.getSharedModList();
}
/**
* @param environment
*/
private ModClassValidator getValidator(LoaderEnvironment environment)
{
List<String> prefixes = new ArrayList<String>();
for (LiteAPI api : environment.getAPIProvider().getAPIs())
{
String prefix = api.getModClassPrefix();
if (prefix != null)
{
LiteLoaderLogger.info("Adding supported mod class prefix '%s'", prefix);
prefixes.add(prefix);
}
}
return new DefaultClassValidator<LiteMod>(LiteMod.class, prefixes);
}
/**
* @param environment
*/
private void initModules(LoaderEnvironment environment)
{
for (LiteAPI api : environment.getAPIProvider().getAPIs())
{
List<EnumeratorModule> apiModules = api.getEnumeratorModules();
if (apiModules != null)
{
for (EnumeratorModule module : apiModules)
{
this.registerModule(module);
}
}
}
}
private void checkState(EnumeratorState state, String action)
{
if (this.state != state)
{
throw new IllegalStateException("Illegal enumerator state whilst performing " + action + ", expecting " + state + " but current state is "
+ this.state);
}
}
private void gotoState(EnumeratorState state)
{
if (state.checkGotoState(this.state))
{
this.state = state;
}
}
/**
* Get the loader environment
*/
public LoaderEnvironment getEnvironment()
{
return this.environment;
}
/**
* Initialise the "shared" mod list if it's not already been created
*/
@Override
public Map<String, Map<String, String>> getSharedModList()
{
try
{
@SuppressWarnings("unchecked")
Map<String, Map<String,String>> sharedModList = (Map<String, Map<String, String>>) Launch.blackboard.get("modList");
if (sharedModList == null)
{
sharedModList = new HashMap<String, Map<String,String>>();
Launch.blackboard.put("modList", sharedModList);
}
return sharedModList;
}
catch (Exception ex)
{
LiteLoaderLogger.warning("Shared mod list was invalid or not accessible, this isn't especially bad but something isn't quite right");
return null;
}
}
/* (non-Javadoc)
* @see com.mumfrey.liteloader.core.PluggableEnumerator
* #registerModule(com.mumfrey.liteloader.core.EnumeratorModule)
*/
@Override
public void registerModule(EnumeratorModule module)
{
this.checkState(EnumeratorState.INIT, "registerModule");
if (module != null && !this.modules.contains(module))
{
LiteLoaderLogger.info("Registering discovery module %s: [%s]", module.getClass().getSimpleName(), module);
this.modules.add(module);
module.init(this.environment, this.properties);
}
}
@Override
public void registerPlugin(EnumeratorPlugin plugin)
{
this.checkState(EnumeratorState.INIT, "registerPlugin");
if (plugin != null && !this.plugins.contains(plugin))
{
LiteLoaderLogger.info("Registering enumerator plugin %s: [%s]", plugin.getClass().getSimpleName(), plugin);
this.plugins.add(plugin);
plugin.init(this.environment, this.properties);
}
}
/**
* Get the list of all enumerated mod classes to load
*/
@Override
public Collection<? extends ModInfo<LoadableMod<?>>> getModsToLoad()
{
this.checkState(EnumeratorState.FINALISED, "getModsToLoad");
return Collections.unmodifiableSet(this.modsToLoad);
}
/**
* Get the set of disabled containers
*/
@Override
public Collection<? extends ModInfo<Loadable<?>>> getDisabledContainers()
{
this.checkState(EnumeratorState.FINALISED, "getDisabledContainers");
return this.containers.getDisabledContainers();
}
@Override
public Collection<? extends ModInfo<Loadable<?>>> getBadContainers()
{
this.checkState(EnumeratorState.FINALISED, "getBadContainers");
return this.containers.getBadContainers();
}
/**
* Get the list of injected tweak containers
*/
@Override
public Collection<? extends ModInfo<Loadable<?>>> getInjectedTweaks()
{
this.checkState(EnumeratorState.FINALISED, "getInjectedTweaks");
return this.containers.getInjectedTweaks();
}
/**
* Get the number of mods to load
*/
@Override
public int modsToLoadCount()
{
return this.modsToLoad.size();
}
/**
* Get a metadata value for the specified mod
*
* @param modClass
* @param metaDataKey
* @param defaultValue
*/
@Override
public String getModMetaData(Class<? extends LiteMod> modClass, String metaDataKey, String defaultValue)
{
this.checkState(EnumeratorState.FINALISED, "getModMetaData");
return this.getContainerForMod(modClass).getMetaValue(metaDataKey, defaultValue);
}
/**
* @param identifier
*/
@Override
public LoadableMod<?> getContainer(String identifier)
{
this.checkState(EnumeratorState.FINALISED, "getContainer");
return this.containers.getEnabledContainer(identifier);
}
/**
* @param modClass
*/
@Override
public LoadableMod<?> getContainer(Class<? extends LiteMod> modClass)
{
this.checkState(EnumeratorState.FINALISED, "getContainer");
return this.getContainerForMod(modClass);
}
/**
* @param modClass
*/
private LoadableMod<?> getContainerForMod(Class<? extends LiteMod> modClass)
{
for (ModInfo<LoadableMod<?>> mod : this.modsToLoad)
{
if (modClass.equals(mod.getModClass()))
{
return mod.getContainer();
}
}
return LoadableMod.NONE;
}
/**
* Get the mod identifier (metadata key), this is used for versioning,
* exclusivity, and enablement checks.
*
* @param modClass
*/
@Override
public String getIdentifier(Class<? extends LiteMod> modClass)
{
String modClassName = modClass.getSimpleName();
for (ModInfo<LoadableMod<?>> mod : this.modsToLoad)
{
if (modClassName.equals(mod.getModClassSimpleName()))
{
return mod.getIdentifier();
}
}
return LiteLoaderEnumerator.getModClassName(modClass);
}
@Override
public void onPreInit()
{
this.discoverContainers();
this.injectDiscoveredTweaks();
}
/**
* Call enumerator modules in order to find mod containers
*/
private void discoverContainers()
{
this.gotoState(EnumeratorState.DISCOVER);
for (EnumeratorModule module : this.modules)
{
try
{
module.enumerate(this, this.environment.getProfile());
}
catch (Throwable th)
{
LiteLoaderLogger.warning(th, "Enumerator Module %s encountered an error whilst enumerating", module.getClass().getName());
}
}
this.checkDependencies();
}
private void injectDiscoveredTweaks()
{
this.gotoState(EnumeratorState.INJECT);
for (TweakContainer<File> tweakContainer : this.containers.getTweakContainers())
{
this.addTweaksFrom(tweakContainer);
}
}
/**
* Enumerate class path and discovered mod files to find mod classes
*/
@Override
public void onInit()
{
try
{
this.gotoState(EnumeratorState.INJECT);
this.injectIntoClassLoader();
this.gotoState(EnumeratorState.REGISTER);
this.registerMods();
this.gotoState(EnumeratorState.FINALISED);
LiteLoaderLogger.info("Mod class discovery completed");
}
catch (IllegalStateException ex) // wut?
{
Throwables.propagate(ex);
}
catch (Throwable th)
{
LiteLoaderLogger.warning(th, "Mod class discovery failed");
}
}
/**
*
*/
private void injectIntoClassLoader()
{
for (EnumeratorModule module : this.modules)
{
try
{
module.injectIntoClassLoader(this, this.classLoader);
}
catch (Throwable th)
{
LiteLoaderLogger.warning(th, "Enumerator Module %s encountered an error whilst injecting", module.getClass().getName());
}
}
}
/**
*
*/
private void registerMods()
{
for (EnumeratorModule module : this.modules)
{
try
{
module.registerMods(this, this.classLoader);
}
catch (Throwable th)
{
LiteLoaderLogger.warning(th, "Enumerator Module %s encountered an error whilst registering mods", module.getClass().getName());
}
}
}
/* (non-Javadoc)
* @see com.mumfrey.liteloader.interfaces.ModularEnumerator
* #registerModContainer(com.mumfrey.liteloader.interfaces.LoadableMod)
*/
@Override
public final boolean registerModContainer(LoadableMod<?> container)
{
this.checkState(EnumeratorState.DISCOVER, "registerModContainer");
if (container == null)
{
return true;
}
if (!this.checkEnabled(container))
{
this.registerDisabledContainer(container, DisabledReason.USER_DISABLED);
return false;
}
if (!this.checkAPIRequirements(container))
{
this.registerDisabledContainer(container, DisabledReason.MISSING_API);
return false;
}
this.registerEnabledContainer(container);
return true;
}
@Override
public void registerBadContainer(Loadable<?> container, String reason)
{
this.checkState(EnumeratorState.DISCOVER, "registerBadContainer");
this.containers.registerBadContainer(container, reason);
}
/**
* @param container
*/
protected void registerEnabledContainer(LoadableMod<?> container)
{
this.checkState(EnumeratorState.DISCOVER, "registerEnabledContainer");
this.containers.registerEnabledContainer(container);
this.observers.all().onRegisterEnabledContainer(this, container);
}
/**
* @param container
*/
protected void registerDisabledContainer(LoadableMod<?> container, DisabledReason reason)
{
this.checkState(EnumeratorState.DISCOVER, "registerDisabledContainer");
LiteLoaderLogger.info(Verbosity.REDUCED, reason.getMessage(container));
this.containers.registerDisabledContainer(container, reason);
this.observers.all().onRegisterDisabledContainer(this, container, reason);
}
/* (non-Javadoc)
* @see com.mumfrey.liteloader.core.PluggableEnumerator#addTweaksFrom(
* com.mumfrey.liteloader.core.TweakContainer)
*/
@Override
public boolean registerTweakContainer(TweakContainer<File> container)
{
this.checkState(EnumeratorState.DISCOVER, "registerTweakContainer");
if (!container.isEnabled(this.environment))
{
LiteLoaderLogger.info(Verbosity.REDUCED, "Mod %s is disabled for profile %s, not injecting tranformers",
container.getIdentifier(), this.environment.getProfile());
return false;
}
this.containers.registerTweakContainer(container);
this.observers.all().onRegisterTweakContainer(this, container);
return true;
}
/**
* @param tweakContainer
*/
private void addTweaksFrom(TweakContainer<File> tweakContainer)
{
this.checkState(EnumeratorState.INJECT, "addTweaksFrom");
if (this.checkDependencies(tweakContainer))
{
if (tweakContainer.hasTweakClass())
{
this.addTweakFrom(tweakContainer);
}
if (tweakContainer.hasClassTransformers())
{
this.addClassTransformersFrom(tweakContainer);
}
if (tweakContainer.hasMixins())
{
this.addMixinsFrom(tweakContainer);
}
}
}
private void addTweakFrom(TweakContainer<File> container)
{
try
{
String tweakClass = container.getTweakClassName();
int tweakPriority = container.getTweakPriority();
LiteLoaderLogger.info(Verbosity.REDUCED, "Mod file '%s' provides tweakClass '%s', adding to Launch queue with priority %d",
container.getName(), tweakClass, tweakPriority);
if (this.environment.addCascadedTweaker(tweakClass, tweakPriority))
{
LiteLoaderLogger.info(Verbosity.REDUCED, "tweakClass '%s' was successfully added", tweakClass);
if (container.isExternalJar())
{
this.containers.registerInjectedTweak(container);
}
this.injectTweakContainer(container);
}
}
catch (MalformedURLException ex)
{
}
}
private void addClassTransformersFrom(TweakContainer<File> container)
{
try
{
for (String classTransformerClass : container.getClassTransformerClassNames())
{
LiteLoaderLogger.info(Verbosity.REDUCED, "Mod file '%s' provides classTransformer '%s', adding to class loader",
container.getName(), classTransformerClass);
ClassTransformerManager transformerManager = this.environment.getTransformerManager();
if (transformerManager != null && transformerManager.injectTransformer(classTransformerClass))
{
LiteLoaderLogger.info(Verbosity.REDUCED, "classTransformer '%s' was successfully added", classTransformerClass);
this.injectContainerRecursive(container);
}
}
}
catch (MalformedURLException ex)
{
}
}
private void addMixinsFrom(MixinContainer<File> container)
{
try
{
if (container.hasMixins())
{
this.injectContainerRecursive(container);
}
for (String config : container.getMixinConfigs())
{
if (config.endsWith(".json"))
{
LiteLoaderLogger.info(Verbosity.REDUCED, "Registering mixin config %s for %s", config, container.getName());
Mixins.addConfiguration(config);
}
else if (config.contains(".json@"))
{
int pos = config.indexOf(".json@");
String phaseName = config.substring(pos + 6);
config = config.substring(0, pos + 5);
Phase phase = Phase.forName(phaseName);
if (phase != null)
{
LiteLoaderLogger.info(Verbosity.REDUCED, "Registering mixin config %s for %s", config, container.getName());
LiteLoaderLogger.warning("%s specifies mixin environment in metadata which is deprecated, use config instead",
container.getName());
MixinEnvironment.getEnvironment(phase).addConfiguration(config);
}
}
}
}
catch (MalformedURLException ex)
{
}
}
protected void injectTweakContainer(TweakContainer<File> container) throws MalformedURLException
{
if (!container.injectIntoClassPath(this.classLoader, true))
{
return;
}
String[] classPathEntries = container.getClassPathEntries();
if (classPathEntries != null)
{
for (String classPathEntry : classPathEntries)
{
try
{
File classPathJar = new File(this.environment.getGameDirectory(), classPathEntry);
URL classPathJarUrl = classPathJar.toURI().toURL();
LiteLoaderLogger.info("Adding Class-Path entry: %s", classPathEntry);
LiteLoaderTweaker.addURLToParentClassLoader(classPathJarUrl);
this.classLoader.addURL(classPathJarUrl);
}
catch (MalformedURLException ex) {}
}
}
}
/**
* @param container
*/
private void injectContainerRecursive(Injectable container) throws MalformedURLException
{
if (container.injectIntoClassPath(this.classLoader, true) && container instanceof LoadableMod)
{
LoadableMod<?> file = (LoadableMod<?>)container;
for (String dependency : file.getDependencies())
{
LoadableMod<?> dependencyContainer = this.containers.getEnabledContainer(dependency);
if (dependencyContainer != null)
{
this.injectContainerRecursive(dependencyContainer);
}
}
}
}
/* (non-Javadoc)
* @see com.mumfrey.liteloader.core.PluggableEnumerator#registerMods(
* com.mumfrey.liteloader.core.LoadableMod, boolean)
*/
@Override
public void registerModsFrom(LoadableMod<?> container, boolean registerContainer)
{
this.checkState(EnumeratorState.REGISTER, "registerModsFrom");
if (this.containers.isDisabledContainer(container))
{
throw new IllegalArgumentException("Attempted to register mods from a disabled container '" + container.getName() + "'");
}
if (this.enumeratedContainers.contains(container))
{
// already handled this container
return;
}
this.enumeratedContainers.add(container);
List<Class<? extends LiteMod>> modClasses = new ArrayList<Class<? extends LiteMod>>();
for (EnumeratorPlugin plugin : this.plugins)
{
List<Class<? extends LiteMod>> classes = plugin.getClasses(container, this.classLoader, this.validator);
LiteLoaderLogger.debug("Plugin %s returned %d classes for %s", plugin.getClass(), classes.size(), container.getDisplayName());
modClasses.addAll(classes);
}
for (Class<? extends LiteMod> modClass : modClasses)
{
Mod mod = new Mod(container, modClass);
this.registerMod(mod);
}
if (modClasses.size() > 0)
{
LiteLoaderLogger.info("Found %d potential matches", modClasses.size());
this.containers.registerEnabledContainer(container);
}
}
/* (non-Javadoc)
* @see com.mumfrey.liteloader.interfaces.ModularEnumerator#registerMod(
* com.mumfrey.liteloader.interfaces.ModInfo)
*/
@Override
public void registerMod(ModInfo<LoadableMod<?>> mod)
{
this.checkState(EnumeratorState.REGISTER, "registerMod");
if (this.modsToLoad.contains(mod))
{
LiteLoaderLogger.warning("Mod name collision for mod with class '%s', maybe you have more than one copy?", mod.getModClassSimpleName());
}
this.modsToLoad.add(mod);
this.observers.all().onModAdded(this, mod);
}
private boolean checkEnabled(LoadableMod<?> container)
{
for (EnumeratorPlugin plugin : this.plugins)
{
if (!plugin.checkEnabled(this.containers, container)) return false;
}
return true;
}
@Override
public boolean checkAPIRequirements(LoadableMod<?> container)
{
for (EnumeratorPlugin plugin : this.plugins)
{
if (!plugin.checkAPIRequirements(this.containers, container)) return false;
}
return true;
}
/**
* Check dependencies of enabled containers
*/
private void checkDependencies()
{
Collection<? extends LoadableMod<?>> enabledContainers = this.containers.getEnabledContainers();
Deque<LoadableMod<?>> containers = new LinkedList<LoadableMod<?>>(enabledContainers);
while (containers.size() > 0)
{
LoadableMod<?> container = containers.pop();
if (!this.checkDependencies(container))
{
this.registerDisabledContainer(container, DisabledReason.MISSING_DEPENDENCY);
// Iterate so that a container disabled by a failed dependency check will also
// disable any containers which depend upon it
containers.clear();
containers.addAll(enabledContainers);
}
}
}
@Override
public boolean checkDependencies(LoadableMod<?> container)
{
for (EnumeratorPlugin plugin : this.plugins)
{
if (!plugin.checkDependencies(this.containers, container)) return false;
}
return true;
}
@SuppressWarnings("unchecked")
public boolean checkDependencies(TweakContainer<File> tweakContainer)
{
if (tweakContainer instanceof LoadableMod)
{
return this.checkDependencies((LoadableMod<File>)tweakContainer);
}
return true;
}
public static String getModClassName(LiteMod mod)
{
return LiteLoaderEnumerator.getModClassName(mod.getClass());
}
public static String getModClassName(Class<? extends LiteMod> mod)
{
return mod.getSimpleName().substring(7);
}
}