Refactored Plugin into an interface, make Javaplugin and relevant code to attempt to actually load plugins

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/org/bukkit/plugin/java/JavaPlugin.java

@@ -0,0 +1,91 @@
+
+package org.bukkit.plugin.java;
+
+import java.io.File;
+import org.bukkit.Server;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.PluginDescriptionFile;
+import org.bukkit.plugin.PluginLoader;
+
+/**
+ * Represents a Java plugin
+ */
+public abstract class JavaPlugin implements Plugin {
+    private boolean isEnabled = false;
+    private final PluginLoader loader;
+    private final Server server;
+    private final File file;
+    private final PluginDescriptionFile description;
+    private final ClassLoader classLoader;
+
+    /**
+     * Constructs a new Java plugin instance
+     *
+     * @param pluginLoader PluginLoader that is responsible for this plugin
+     * @param instance Server instance that is running this plugin
+     * @param desc PluginDescriptionFile containing metadata on this plugin
+     * @param plugin File containing this plugin
+     * @param cLoader ClassLoader which holds this plugin
+     */
+    protected JavaPlugin(PluginLoader pluginLoader, Server instance, PluginDescriptionFile desc, File plugin, ClassLoader cLoader) {
+        loader = pluginLoader;
+        server = instance;
+        file = plugin;
+        description = desc;
+        classLoader = cLoader;
+    }
+
+    /**
+     * Gets the associated PluginLoader responsible for this plugin
+     *
+     * @return PluginLoader that controls this plugin
+     */
+    public final PluginLoader getPluginLoader() {
+        return loader;
+    }
+
+    /**
+     * Returns the Server instance currently running this plugin
+     *
+     * @return Server running this plugin
+     */
+    public final Server getServer() {
+        return server;
+    }
+
+    /**
+     * Returns a value indicating whether or not this plugin is currently enabled
+     *
+     * @return true if this plugin is enabled, otherwise false
+     */
+    public final boolean isEnabled() {
+        return isEnabled;
+    }
+
+    /**
+     * Returns the file which contains this plugin
+     *
+     * @return File containing this plugin
+     */
+    protected File getFile() {
+        return file;
+    }
+
+    /**
+     * Returns the plugin.yaml file containing the details for this plugin
+     *
+     * @return Contents of the plugin.yaml file
+     */
+    public PluginDescriptionFile getDescription() {
+        return description;
+    }
+
+    /**
+     * Returns the ClassLoader which holds this plugin
+     *
+     * @return ClassLoader holding this plugin
+     */
+    protected ClassLoader getClassLoader() {
+        return classLoader;
+    }
+}