make PluginManager available in Plugin via PluginWrapper

pf4j/src/main/java/ro/fortsoft/pf4j/DefaultPluginManager.java

@@ -780,7 +780,7 @@ public class DefaultPluginManager implements PluginManager {
 
         // create the plugin wrapper
         log.debug("Creating wrapper for plugin '{}'", pluginPath);
-        PluginWrapper pluginWrapper = new PluginWrapper(pluginDescriptor, pluginPath, pluginClassLoader);
+        PluginWrapper pluginWrapper = new PluginWrapper(this, pluginDescriptor, pluginPath, pluginClassLoader);
         pluginWrapper.setPluginFactory(pluginFactory);
         pluginWrapper.setRuntimeMode(getRuntimeMode());
 

pf4j/src/main/java/ro/fortsoft/pf4j/PluginWrapper.java

@@ -19,6 +19,7 @@ package ro.fortsoft.pf4j;
  */
 public class PluginWrapper {
 
+    PluginManager pluginManager;
 	PluginDescriptor descriptor;
 	String pluginPath;
 	PluginClassLoader pluginClassLoader;
@@ -27,7 +28,8 @@ public class PluginWrapper {
 	RuntimeMode runtimeMode;
     Plugin plugin; // cache
 
-	public PluginWrapper(PluginDescriptor descriptor, String pluginPath, PluginClassLoader pluginClassLoader) {
+	public PluginWrapper(PluginManager pluginManager, PluginDescriptor descriptor, String pluginPath, PluginClassLoader pluginClassLoader) {
+        this.pluginManager = pluginManager;
 		this.descriptor = descriptor;
 		this.pluginPath = pluginPath;
 		this.pluginClassLoader = pluginClassLoader;
@@ -35,6 +37,13 @@ public class PluginWrapper {
 		pluginState = PluginState.CREATED;
 	}
 
+    /**
+     * Returns the plugin manager.
+     */
+    public PluginManager getPluginManager() {
+        return pluginManager;
+    }
+
     /**
      * Returns the plugin descriptor.
      */