DefaultEnumeratorPlugin.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.api;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import com.mumfrey.liteloader.api.ContainerRegistry;
import com.mumfrey.liteloader.api.EnumeratorPlugin;
import com.mumfrey.liteloader.api.ModClassValidator;
import com.mumfrey.liteloader.api.manager.APIProvider;
import com.mumfrey.liteloader.core.exceptions.OutdatedLoaderException;
import com.mumfrey.liteloader.interfaces.LoadableMod;
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;
public class DefaultEnumeratorPlugin implements EnumeratorPlugin
{
private LoaderEnvironment environment;
@Override
public void init(LoaderEnvironment environment, LoaderProperties properties)
{
this.environment = environment;
}
@Override
public boolean checkEnabled(ContainerRegistry containers, LoadableMod<?> container)
{
return container.isEnabled(this.environment);
}
@Override
public boolean checkAPIRequirements(ContainerRegistry containers, LoadableMod<?> container)
{
boolean result = true;
APIProvider apiProvider = this.environment.getAPIProvider();
for (String identifier : container.getRequiredAPIs())
{
if (!apiProvider.isAPIAvailable(identifier))
{
container.registerMissingAPI(identifier);
result = false;
}
}
return result;
}
@Override
public boolean checkDependencies(ContainerRegistry containers, LoadableMod<?> base)
{
if (base == null || !base.hasDependencies()) return true;
HashSet<String> circularDependencySet = new HashSet<String>();
circularDependencySet.add(base.getIdentifier());
boolean result = this.checkDependencies(containers, base, base, circularDependencySet);
LiteLoaderLogger.info(Verbosity.REDUCED, "Dependency check for %s %s", base.getIdentifier(), result ? "passed" : "failed");
return result;
}
private boolean checkDependencies(ContainerRegistry containers, LoadableMod<?> base, LoadableMod<?> container, Set<String> circularDependencySet)
{
if (container.getDependencies().size() == 0)
{
return true;
}
boolean result = true;
for (String dependency : container.getDependencies())
{
if (!circularDependencySet.contains(dependency))
{
circularDependencySet.add(dependency);
LoadableMod<?> dependencyContainer = containers.getEnabledContainer(dependency);
if (dependencyContainer != LoadableMod.NONE)
{
String identifier = dependency;
if (this.environment.getEnabledModsList().isEnabled(this.environment.getProfile(), identifier))
{
result &= this.checkDependencies(containers, base, dependencyContainer, circularDependencySet);
}
else
{
// LiteLoaderLogger.warning("Dependency %s required by %s is currently disabled", dependency, base.getIdentifier());
base.registerMissingDependency(dependency);
result = false;
}
}
else
{
// LiteLoaderLogger.info("Dependency %s for %s is was not located, no container ", dependency, base.getIdentifier());
base.registerMissingDependency(dependency);
result = false;
}
}
}
return result;
}
/**
* Enumerate classes on the classpath which are subclasses of the specified
* class
*/
@Override
public <T> List<Class<? extends T>> getClasses(LoadableMod<?> container, ClassLoader classloader, ModClassValidator validator)
{
List<Class<? extends T>> classes = new ArrayList<Class<? extends T>>();
if (container != null)
{
try
{
for (String fullClassName : container.getContainedClassNames())
{
boolean isDefaultPackage = fullClassName.lastIndexOf('.') == -1;
String className = isDefaultPackage ? fullClassName : fullClassName.substring(fullClassName.lastIndexOf('.') + 1);
if (validator.validateName(className))
{
Class<? extends T> clazz = DefaultEnumeratorPlugin.<T>checkClass(classloader, validator, fullClassName);
if (clazz != null && !classes.contains(clazz))
{
classes.add(clazz);
}
}
}
}
catch (OutdatedLoaderException ex)
{
classes.clear();
LiteLoaderLogger.info(Verbosity.REDUCED, "Error searching in '%s', missing API component '%s', your loader is probably out of date",
container, ex.getMessage());
}
catch (Throwable th)
{
LiteLoaderLogger.warning(th, "Enumeration error");
}
}
return classes;
}
@SuppressWarnings("unchecked")
private static <T> Class<? extends T> checkClass(ClassLoader classLoader, ModClassValidator validator, String className)
throws OutdatedLoaderException
{
if (className.indexOf('$') > -1)
{
return null;
}
try
{
Class<?> candidateClass = classLoader.loadClass(className);
if (validator.validateClass(classLoader, candidateClass))
{
return (Class<? extends T>)candidateClass;
}
}
catch (Throwable th)
{
th.printStackTrace();
if (th.getCause() != null)
{
String missingClassName = th.getCause().getMessage();
if (th.getCause() instanceof NoClassDefFoundError && missingClassName != null)
{
if (missingClassName.startsWith("com/mumfrey/liteloader/"))
{
throw new OutdatedLoaderException(missingClassName.substring(missingClassName.lastIndexOf('/') + 1));
}
}
}
LiteLoaderLogger.warning(th, "checkAndAddClass error while checking '%s'", className);
}
return null;
}
}