/
PluginManager.java
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/
PluginManager.java
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package net.ME1312.Galaxi.Plugin;
import net.ME1312.Galaxi.Galaxi;
import net.ME1312.Galaxi.Library.Event.*;
import net.ME1312.Galaxi.Library.Event.Listener;
import net.ME1312.Galaxi.Library.Util;
import net.ME1312.Galaxi.Plugin.Command.Command;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;
public abstract class PluginManager {
private TreeMap<Short, HashMap<Class<? extends Event>, HashMap<PluginInfo, HashMap<Object, List<Method>>>>> listeners = new TreeMap<Short, HashMap<Class<? extends Event>, HashMap<PluginInfo, HashMap<Object, List<Method>>>>>();
private TreeMap<String, Command> commands = new TreeMap<String, Command>();
/**
* Get a map of the Plugins
*
* @return PluginInfo Map
*/
public abstract Map<String, PluginInfo> getPlugins();
/**
* Gets a Plugin
*
* @param name Plugin Name
* @return PluginInfo
*/
public PluginInfo getPlugin(String name) {
if (Util.isNull(name)) throw new NullPointerException();
return getPlugins().get(name.toLowerCase());
}
/**
* Gets a Plugin
*
* @param main Plugin Main Class
* @return PluginInfo
*/
@SuppressWarnings("unchecked")
public PluginInfo getPlugin(Class<?> main) {
if (Util.isNull(main)) throw new NullPointerException();
return Util.getDespiteException(() -> Util.reflect(PluginInfo.class.getDeclaredField("pluginMap"), null), null);
}
/**
* Gets a Plugin
*
* @param main Plugin Object
* @return PluginInfo
*/
public PluginInfo getPlugin(Object main) {
if (Util.isNull(main)) throw new NullPointerException();
return Util.getDespiteException(() -> PluginInfo.getPluginInfo(main), null);
}
/**
* Registers a Command
*
* @param command Command
* @param handles Aliases
*/
public void addCommand(Command command, String... handles) {
for (String handle : handles) {
commands.put(handle.toLowerCase(), command);
}
}
/**
* Unregisters a Command
*
* @param handles Aliases
*/
public void removeCommand(String... handles) {
for (String handle : handles) {
commands.remove(handle.toLowerCase());
}
}
/**
* Register SubEvent Listeners
*
* @see Subscribe
* @param plugin PluginInfo
* @param listeners Listeners
*/
@SuppressWarnings("unchecked")
public void registerListeners(PluginInfo plugin, Object... listeners) {
for (Object listener : listeners) {
if (Util.isNull(plugin, listener)) throw new NullPointerException();
for (Method method : Arrays.asList(listener.getClass().getMethods())) {
if (method.isAnnotationPresent(Subscribe.class)) {
if (method.getParameterTypes().length == 1) {
if (Event.class.isAssignableFrom(method.getParameterTypes()[0])) {
registerListener(plugin, (Class<? extends Event>) method.getParameterTypes()[0], method.getAnnotation(Subscribe.class).order(), listener, method);
} else {
plugin.getLogger().error.println(
"Cannot register listener \"" + listener.getClass().getCanonicalName() + '.' + method.getName() + "(" + method.getParameterTypes()[0].getCanonicalName() + ")\":",
"\"" + method.getParameterTypes()[0].getCanonicalName() + "\" is not an Event");
}
} else {
LinkedList<String> args = new LinkedList<String>();
for (Class<?> clazz : method.getParameterTypes()) args.add(clazz.getCanonicalName());
plugin.getLogger().error.println(
"Cannot register listener \"" + listener.getClass().getCanonicalName() + '.' + method.getName() + "(" + args.toString().substring(1, args.toString().length() - 1) + ")\":",
((method.getParameterTypes().length > 0) ? "Too many" : "No") + " parameters for method to be executed");
}
}
}
}
}
/**
* Register SubEvent Listeners
*
* @param plugin PluginInfo
* @param event Event Type
* @param listeners Listeners
* @param <T> Event Type
*/
@SafeVarargs
public final <T extends Event> void registerListener(PluginInfo plugin, Class<T> event, Listener<? extends T>... listeners) {
registerListener(plugin, event, null, listeners);
}
/**
* Register SubEvent Listeners
*
* @see ListenerOrder
* @param plugin PluginInfo
* @param event Event Type
* @param order Listener Order (will convert to short)
* @param listeners Listeners
* @param <T> Event Type
*/
@SafeVarargs
public final <T extends Event> void registerListener(PluginInfo plugin, Class<T> event, Number order, Listener<? extends T>... listeners) {
for (Listener listener : listeners) {
if (Util.isNull(plugin, event, listener)) throw new NullPointerException();
try {
short o;
Method m = Listener.class.getMethod("run", Event.class);
if (order == null) {
if (m.isAnnotationPresent(Subscribe.class)) {
o = m.getAnnotation(Subscribe.class).order();
} else o = ListenerOrder.NORMAL;
} else o = order.shortValue();
registerListener(plugin, event, o, listener, m);
} catch (Exception e) {
Galaxi.getInstance().getAppInfo().getLogger().error.println(e);
}
}
}
private void registerListener(PluginInfo plugin, Class<? extends Event> event, short order, Object listener, Method method) {
HashMap<Class<? extends Event>, HashMap<PluginInfo, HashMap<Object, List<Method>>>> events = (this.listeners.keySet().contains(order))?this.listeners.get(order):new LinkedHashMap<Class<? extends Event>, HashMap<PluginInfo, HashMap<Object, List<Method>>>>();
HashMap<PluginInfo, HashMap<Object, List<Method>>> plugins = (events.keySet().contains(event))?events.get(event):new LinkedHashMap<PluginInfo, HashMap<Object, List<Method>>>();
HashMap<Object, List<Method>> objects = (plugins.keySet().contains(plugin))?plugins.get(plugin):new LinkedHashMap<Object, List<Method>>();
List<Method> methods = (objects.keySet().contains(listener))?objects.get(listener):new LinkedList<Method>();
methods.add(method);
objects.put(listener, methods);
plugins.put(plugin, objects);
events.put(event, plugins);
this.listeners.put(order, events);
}
/**
* Unregister SubEvent Listeners
*
* @param plugin PluginInfo
* @param listeners Listeners
*/
public void unregisterListeners(PluginInfo plugin, Object... listeners) {
for (Object listener : listeners) {
if (Util.isNull(plugin, listener)) throw new NullPointerException();
TreeMap<Short, HashMap<Class<? extends Event>, HashMap<PluginInfo, HashMap<Object, List<Method>>>>> map = new TreeMap<Short, HashMap<Class<? extends Event>, HashMap<PluginInfo, HashMap<Object, List<Method>>>>>(this.listeners);
for (Short order : map.keySet()) {
for (Class<? extends Event> event : map.get(order).keySet()) {
if (map.get(order).get(event).keySet().contains(plugin) && map.get(order).get(event).get(plugin).keySet().contains(listener)) {
HashMap<Class<? extends Event>, HashMap<PluginInfo, HashMap<Object, List<Method>>>> events = this.listeners.get(order);
HashMap<PluginInfo, HashMap<Object, List<Method>>> plugins = this.listeners.get(order).get(event);
HashMap<Object, List<Method>> objects = this.listeners.get(order).get(event).get(plugin);
objects.remove(listener);
plugins.put(plugin, objects);
events.put(event, plugins);
this.listeners.put(order, events);
}
}
}
}
}
/**
* Run a SubEvent
*
* @param event SubEvent
*/
@SuppressWarnings("unchecked")
public void executeEvent(Event event) {
executeEvent((Class<Event>) event.getClass(), event);
}
/**
* Run a SubEvent (as super class)
*
* @param type Super Class
* @param event SubEvent
* @param <T> Event Type
*/
public <T extends Event> void executeEvent(Class<T> type, T event) {
if (Util.isNull(event)) throw new NullPointerException();
if (!type.isInstance(event)) throw new ClassCastException(event.getClass().getCanonicalName() + " cannot be cast to " + type.getCanonicalName());
boolean reverse = type.isAnnotationPresent(ReverseOrder.class);
LinkedList<Short> o = new LinkedList<>(listeners.keySet());
if (reverse) Collections.reverse(o);
for (Short order : listeners.keySet()) {
if (listeners.get(order).keySet().contains(type)) {
LinkedList<PluginInfo> p = new LinkedList<>(listeners.get(order).get(type).keySet());
if (reverse) Collections.reverse(p);
for (PluginInfo plugin : p) {
Util.isException(() -> Util.reflect(Event.class.getDeclaredField("plugin"), event, plugin));
LinkedList<Object> l = new LinkedList<>(listeners.get(order).get(type).get(plugin).keySet());
if (reverse) Collections.reverse(l);
for (Object listener : l) {
LinkedList<Method> m = new LinkedList<>(listeners.get(order).get(type).get(plugin).get(listener));
if (reverse) Collections.reverse(m);
for (Method method : m) {
if (!(event instanceof Cancellable) || !((Cancellable) event).isCancelled() || (method.isAnnotationPresent(Subscribe.class) && method.getAnnotation(Subscribe.class).override())) {
try {
method.invoke(listener, event);
} catch (InvocationTargetException e) {
plugin.getLogger().error.println("Event listener \"" + listener.getClass().getCanonicalName() + '.' + method.getName() + "(" + type.getTypeName() + ")\" had an unhandled exception:");
plugin.getLogger().error.println(e.getTargetException());
} catch (IllegalAccessException e) {
plugin.getLogger().error.println("Cannot access method \"" + listener.getClass().getCanonicalName() + '.' + method.getName() + "(" + type.getTypeName() + ")\"");
plugin.getLogger().error.println(e);
}
}
}
}
}
}
}
Util.isException(() -> Util.reflect(Event.class.getDeclaredField("plugin"), event, null));
}
}