Editor config style applied

demo/api/pom.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    
+
     <parent>
         <groupId>ro.fortsoft.pf4j.demo</groupId>
         <artifactId>pf4j-demo-parent</artifactId>
@@ -23,7 +23,7 @@
             </plugin>
         </plugins>
     </build>
-    
+
     <dependencies>
         <dependency>
             <groupId>ro.fortsoft.pf4j</groupId>
@@ -32,5 +32,5 @@
             <scope>provided</scope>
         </dependency>
     </dependencies>
-    
+
 </project>

demo/api/src/main/java/ro/fortsoft/pf4j/demo/api/Greeting.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

demo/app/src/main/assembly/assembly.xml

@@ -1,6 +1,6 @@
 <!--
  Describes the dist
-  
+
  @author Decebal Suiu
  @version 1.0
 -->

demo/app/src/main/java/ro/fortsoft/pf4j/demo/Boot.java

@@ -1,93 +1,93 @@
-/*
- * Copyright 2012 Decebal Suiu
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
- * the License. You may obtain a copy of the License in the LICENSE file, or at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
- * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- */
-package ro.fortsoft.pf4j.demo;
-
-import java.util.List;
-import java.util.Set;
-
-import org.apache.commons.lang.StringUtils;
-
-import ro.fortsoft.pf4j.DefaultPluginManager;
-import ro.fortsoft.pf4j.PluginManager;
-import ro.fortsoft.pf4j.PluginWrapper;
-import ro.fortsoft.pf4j.demo.api.Greeting;
-
-/**
- * A boot class that start the demo.
- *
- * @author Decebal Suiu
- */
-public class Boot {
-
-    public static void main(String[] args) {
-        // print logo
-        printLogo();
-
-        // create the plugin manager
-        final PluginManager pluginManager = new DefaultPluginManager();
-
-        // load the plugins
-        pluginManager.loadPlugins();
-
-        // enable a disabled plugin
-//        pluginManager.enablePlugin("welcome-plugin");
-
-        // start (active/resolved) the plugins
-        pluginManager.startPlugins();
-
-        // retrieves the extensions for Greeting extension point
-        List<Greeting> greetings = pluginManager.getExtensions(Greeting.class);
-        System.out.println(String.format("Found %d extensions for extension point '%s'", greetings.size(), Greeting.class.getName()));
-        for (Greeting greeting : greetings) {
-            System.out.println(">>> " + greeting.getGreeting());
-        }
-
-        // print extensions from classpath (non plugin)
-        System.out.println(String.format("Extensions added by classpath:"));
-        Set<String> extensionClassNames = pluginManager.getExtensionClassNames(null);
-        for (String extension : extensionClassNames) {
-            System.out.println("   " + extension);
-        }
-
-        // print extensions for each started plugin
-        List<PluginWrapper> startedPlugins = pluginManager.getStartedPlugins();
-        for (PluginWrapper plugin : startedPlugins) {
-            String pluginId = plugin.getDescriptor().getPluginId();
-            System.out.println(String.format("Extensions added by plugin '%s':", pluginId));
-            extensionClassNames = pluginManager.getExtensionClassNames(pluginId);
-            for (String extension : extensionClassNames) {
-                System.out.println("   " + extension);
-            }
-        }
-
-        // stop the plugins
-        pluginManager.stopPlugins();
-        /*
-        Runtime.getRuntime().addShutdownHook(new Thread() {
-
-			@Override
-			public void run() {
-				pluginManager.stopPlugins();
-			}
-
-        });
-        */
-    }
-
-	private static void printLogo() {
-    	System.out.println(StringUtils.repeat("#", 40));
-    	System.out.println(StringUtils.center("PF4J-DEMO", 40));
-    	System.out.println(StringUtils.repeat("#", 40));
-	}
-
-}
+/*
+ * Copyright 2012 Decebal Suiu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
+ * the License. You may obtain a copy of the License in the LICENSE file, or at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package ro.fortsoft.pf4j.demo;
+
+import java.util.List;
+import java.util.Set;
+
+import org.apache.commons.lang.StringUtils;
+
+import ro.fortsoft.pf4j.DefaultPluginManager;
+import ro.fortsoft.pf4j.PluginManager;
+import ro.fortsoft.pf4j.PluginWrapper;
+import ro.fortsoft.pf4j.demo.api.Greeting;
+
+/**
+ * A boot class that start the demo.
+ *
+ * @author Decebal Suiu
+ */
+public class Boot {
+
+    public static void main(String[] args) {
+        // print logo
+        printLogo();
+
+        // create the plugin manager
+        final PluginManager pluginManager = new DefaultPluginManager();
+
+        // load the plugins
+        pluginManager.loadPlugins();
+
+        // enable a disabled plugin
+//        pluginManager.enablePlugin("welcome-plugin");
+
+        // start (active/resolved) the plugins
+        pluginManager.startPlugins();
+
+        // retrieves the extensions for Greeting extension point
+        List<Greeting> greetings = pluginManager.getExtensions(Greeting.class);
+        System.out.println(String.format("Found %d extensions for extension point '%s'", greetings.size(), Greeting.class.getName()));
+        for (Greeting greeting : greetings) {
+            System.out.println(">>> " + greeting.getGreeting());
+        }
+
+        // print extensions from classpath (non plugin)
+        System.out.println(String.format("Extensions added by classpath:"));
+        Set<String> extensionClassNames = pluginManager.getExtensionClassNames(null);
+        for (String extension : extensionClassNames) {
+            System.out.println("   " + extension);
+        }
+
+        // print extensions for each started plugin
+        List<PluginWrapper> startedPlugins = pluginManager.getStartedPlugins();
+        for (PluginWrapper plugin : startedPlugins) {
+            String pluginId = plugin.getDescriptor().getPluginId();
+            System.out.println(String.format("Extensions added by plugin '%s':", pluginId));
+            extensionClassNames = pluginManager.getExtensionClassNames(pluginId);
+            for (String extension : extensionClassNames) {
+                System.out.println("   " + extension);
+            }
+        }
+
+        // stop the plugins
+        pluginManager.stopPlugins();
+        /*
+        Runtime.getRuntime().addShutdownHook(new Thread() {
+
+			@Override
+			public void run() {
+				pluginManager.stopPlugins();
+			}
+
+        });
+        */
+    }
+
+	private static void printLogo() {
+    	System.out.println(StringUtils.repeat("#", 40));
+    	System.out.println(StringUtils.center("PF4J-DEMO", 40));
+    	System.out.println(StringUtils.repeat("#", 40));
+	}
+
+}

demo/plugins/disabled.txt

@@ -3,4 +3,4 @@
 # - add one plugin id on each line
 # - put this file in plugins folder
 ########################################
-#welcome-plugin
+#welcome-plugin

demo/plugins/enabled.txt

@@ -3,4 +3,4 @@
 # - add one plugin id on each line
 # - put this file in plugins folder
 ########################################
-#welcome-plugin
+#welcome-plugin

demo/plugins/plugin1/pom.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    
+
     <parent>
         <groupId>ro.fortsoft.pf4j.demo</groupId>
         <artifactId>pf4j-demo-plugins</artifactId>
@@ -19,7 +19,7 @@
         <plugin.version>0.0.1</plugin.version>
         <plugin.provider>Decebal Suiu</plugin.provider>
         <plugin.dependencies />
-    </properties>   
+    </properties>
 
     <build>
         <plugins>
@@ -43,7 +43,7 @@
                 </executions>
             </plugin>
             -->
-            
+
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-antrun-plugin</artifactId>
@@ -63,7 +63,7 @@
                     </execution>
                 </executions>
             </plugin>
-            
+
             <plugin>
                 <artifactId>maven-assembly-plugin</artifactId>
                 <version>2.3</version>
@@ -110,7 +110,7 @@
                 </configuration>
             </plugin>
         </plugins>
-    </build>        
+    </build>
 
     <dependencies>
 		<dependency>
@@ -119,5 +119,5 @@
 			<version>2.6</version>
 		</dependency>
     </dependencies>
-    
+
 </project>

demo/plugins/plugin1/src/main/assembly/assembly.xml

@@ -1,6 +1,6 @@
 <!--
  Describes the plugin archive
-  
+
  @author Decebal Suiu
  @version 1.0
 -->

demo/plugins/plugin1/src/main/java/ro/fortsoft/pf4j/demo/welcome/WelcomePlugin.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

demo/plugins/plugin2/pom.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    
+
     <parent>
         <groupId>ro.fortsoft.pf4j.demo</groupId>
         <artifactId>pf4j-demo-plugins</artifactId>
@@ -19,7 +19,7 @@
         <plugin.version>0.0.1</plugin.version>
         <plugin.provider>Decebal Suiu</plugin.provider>
         <plugin.dependencies />
-    </properties>   
+    </properties>
 
     <build>
         <plugins>
@@ -43,7 +43,7 @@
                 </executions>
             </plugin>
             -->
-        
+
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-antrun-plugin</artifactId>
@@ -63,7 +63,7 @@
                     </execution>
                 </executions>
             </plugin>
-        
+
             <plugin>
                 <artifactId>maven-assembly-plugin</artifactId>
                 <version>2.3</version>
@@ -110,6 +110,6 @@
                 </configuration>
             </plugin>
         </plugins>
-    </build>        
+    </build>
 
 </project>

demo/plugins/plugin2/src/main/assembly/assembly.xml

@@ -1,6 +1,6 @@
 <!--
  Describes the plugin archive
-  
+
  @author Decebal Suiu
  @version 1.0
 -->

demo/plugins/plugin2/src/main/java/ro/fortsoft/pf4j/demo/hello/HelloPlugin.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

demo/plugins/pom.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    
+
     <parent>
         <groupId>ro.fortsoft.pf4j.demo</groupId>
         <artifactId>pf4j-demo-parent</artifactId>
@@ -27,7 +27,7 @@
                 <directory>src/main/resources</directory>
             </resource>
         </resources>
-        
+
         <plugins>
             <plugin>
                 <artifactId>maven-dependency-plugin</artifactId>
@@ -93,7 +93,7 @@
             <artifactId>pf4j</artifactId>
             <version>${project.version}</version>
             <scope>provided</scope>
-        </dependency>    
+        </dependency>
 
         <dependency>
             <groupId>ro.fortsoft.pf4j.demo</groupId>
@@ -102,5 +102,5 @@
             <scope>provided</scope>
         </dependency>
     </dependencies>
-    
+
 </project>

demo/pom.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    
+
     <parent>
         <groupId>ro.fortsoft.pf4j</groupId>
         <artifactId>pf4j-parent</artifactId>

demo_gradle/api/src/main/java/ro/fortsoft/pf4j/demo/api/Greeting.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

demo_gradle/app/src/main/java/ro/fortsoft/pf4j/demo/Boot.java

@@ -1,96 +1,96 @@
-/*
- * Copyright 2012 Decebal Suiu
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
- * the License. You may obtain a copy of the License in the LICENSE file, or at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
- * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- */
-package ro.fortsoft.pf4j.demo;
-
-import java.util.List;
-import java.util.Set;
-
-import org.apache.commons.lang3.StringUtils;
-
-import ro.fortsoft.pf4j.DefaultPluginManager;
-import ro.fortsoft.pf4j.PluginManager;
-import ro.fortsoft.pf4j.PluginWrapper;
-import ro.fortsoft.pf4j.demo.api.Greeting;
-
-/**
- * A boot class that start the demo.
- *
- * @author Decebal Suiu
- */
-public class Boot {
-
-    public static void main(String[] args) {
-        // print logo
-        printLogo();
-
-        // create the plugin manager
-        final PluginManager pluginManager = new DefaultPluginManager();
-
-        // load the plugins
-        pluginManager.loadPlugins();
-
-        // enable a disabled plugin
-//        pluginManager.enablePlugin("welcome-plugin");
-
-        // start (active/resolved) the plugins
-        pluginManager.startPlugins();
-
-        System.out.println("Plugindirectory: ");
-        System.out.println("\t" + System.getProperty("pf4j.pluginsDir", "plugins") + "\n");
-
-        // retrieves the extensions for Greeting extension point
-        List<Greeting> greetings = pluginManager.getExtensions(Greeting.class);
-        System.out.println(String.format("Found %d extensions for extension point '%s'", greetings.size(), Greeting.class.getName()));
-        for (Greeting greeting : greetings) {
-            System.out.println(">>> " + greeting.getGreeting());
-        }
-
-        // // print extensions from classpath (non plugin)
-        // System.out.println(String.format("Extensions added by classpath:"));
-        // Set<String> extensionClassNames = pluginManager.getExtensionClassNames(null);
-        // for (String extension : extensionClassNames) {
-        //     System.out.println("   " + extension);
-        // }
-
-        // print extensions for each started plugin
-        List<PluginWrapper> startedPlugins = pluginManager.getStartedPlugins();
-        for (PluginWrapper plugin : startedPlugins) {
-            String pluginId = plugin.getDescriptor().getPluginId();
-            System.out.println(String.format("Extensions added by plugin '%s':", pluginId));
-            // extensionClassNames = pluginManager.getExtensionClassNames(pluginId);
-            // for (String extension : extensionClassNames) {
-            //     System.out.println("   " + extension);
-            // }
-        }
-
-        // stop the plugins
-        pluginManager.stopPlugins();
-        /*
-        Runtime.getRuntime().addShutdownHook(new Thread() {
-
-			@Override
-			public void run() {
-				pluginManager.stopPlugins();
-			}
-
-        });
-        */
-    }
-
-	private static void printLogo() {
-    	System.out.println(StringUtils.repeat("#", 40));
-    	System.out.println(StringUtils.center("PF4J-DEMO", 40));
-    	System.out.println(StringUtils.repeat("#", 40));
-	}
-
-}
+/*
+ * Copyright 2012 Decebal Suiu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
+ * the License. You may obtain a copy of the License in the LICENSE file, or at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package ro.fortsoft.pf4j.demo;
+
+import java.util.List;
+import java.util.Set;
+
+import org.apache.commons.lang3.StringUtils;
+
+import ro.fortsoft.pf4j.DefaultPluginManager;
+import ro.fortsoft.pf4j.PluginManager;
+import ro.fortsoft.pf4j.PluginWrapper;
+import ro.fortsoft.pf4j.demo.api.Greeting;
+
+/**
+ * A boot class that start the demo.
+ *
+ * @author Decebal Suiu
+ */
+public class Boot {
+
+    public static void main(String[] args) {
+        // print logo
+        printLogo();
+
+        // create the plugin manager
+        final PluginManager pluginManager = new DefaultPluginManager();
+
+        // load the plugins
+        pluginManager.loadPlugins();
+
+        // enable a disabled plugin
+//        pluginManager.enablePlugin("welcome-plugin");
+
+        // start (active/resolved) the plugins
+        pluginManager.startPlugins();
+
+        System.out.println("Plugindirectory: ");
+        System.out.println("\t" + System.getProperty("pf4j.pluginsDir", "plugins") + "\n");
+
+        // retrieves the extensions for Greeting extension point
+        List<Greeting> greetings = pluginManager.getExtensions(Greeting.class);
+        System.out.println(String.format("Found %d extensions for extension point '%s'", greetings.size(), Greeting.class.getName()));
+        for (Greeting greeting : greetings) {
+            System.out.println(">>> " + greeting.getGreeting());
+        }
+
+        // // print extensions from classpath (non plugin)
+        // System.out.println(String.format("Extensions added by classpath:"));
+        // Set<String> extensionClassNames = pluginManager.getExtensionClassNames(null);
+        // for (String extension : extensionClassNames) {
+        //     System.out.println("   " + extension);
+        // }
+
+        // print extensions for each started plugin
+        List<PluginWrapper> startedPlugins = pluginManager.getStartedPlugins();
+        for (PluginWrapper plugin : startedPlugins) {
+            String pluginId = plugin.getDescriptor().getPluginId();
+            System.out.println(String.format("Extensions added by plugin '%s':", pluginId));
+            // extensionClassNames = pluginManager.getExtensionClassNames(pluginId);
+            // for (String extension : extensionClassNames) {
+            //     System.out.println("   " + extension);
+            // }
+        }
+
+        // stop the plugins
+        pluginManager.stopPlugins();
+        /*
+        Runtime.getRuntime().addShutdownHook(new Thread() {
+
+			@Override
+			public void run() {
+				pluginManager.stopPlugins();
+			}
+
+        });
+        */
+    }
+
+	private static void printLogo() {
+    	System.out.println(StringUtils.repeat("#", 40));
+    	System.out.println(StringUtils.center("PF4J-DEMO", 40));
+    	System.out.println(StringUtils.repeat("#", 40));
+	}
+
+}

demo_gradle/plugins/disabled.txt

@@ -3,4 +3,4 @@
 # - add one plugin id on each line
 # - put this file in plugins folder
 ########################################
-#welcome-plugin
+#welcome-plugin

demo_gradle/plugins/enabled.txt

@@ -3,4 +3,4 @@
 # - add one plugin id on each line
 # - put this file in plugins folder
 ########################################
-#welcome-plugin
+#welcome-plugin

demo_gradle/plugins/plugin2/src/main/java/ro/fortsoft/pf4j/demo/hello/HelloPlugin.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

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

@@ -18,7 +18,7 @@ import java.util.List;
 
 /**
  * @author Decebal Suiu
- * @author Mário Franco
+ * @author Mário Franco
  */
 public class CompoundPluginRepository implements PluginRepository {
 

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -14,7 +14,7 @@ package ro.fortsoft.pf4j;
 
 /**
  * CyclicDependencyException will be thrown if a cyclic dependency is detected.
- * 
+ *
  * @author Decebal Suiu
  */
 class CyclicDependencyException extends PluginException {

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2013 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -13,9 +13,9 @@
 package ro.fortsoft.pf4j;
 
 /**
- * The default implementation for PluginDescriptorFinder. 
+ * The default implementation for PluginDescriptorFinder.
  * Now, this class it's a "link" to {@link ro.fortsoft.pf4j.ManifestPluginDescriptorFinder}.
- * 
+ *
  * @author Decebal Suiu
  */
 public class DefaultPluginDescriptorFinder extends ManifestPluginDescriptorFinder {
@@ -23,5 +23,5 @@ public class DefaultPluginDescriptorFinder extends ManifestPluginDescriptorFinde
 	public DefaultPluginDescriptorFinder(PluginClasspath pluginClasspath) {
 		super(pluginClasspath);
 	}
-    	
+
 }

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

@@ -22,7 +22,7 @@ import java.util.List;
 
 /**
  * @author Decebal Suiu
- * @author Mário Franco
+ * @author Mário Franco
  */
 public class DefaultPluginRepository implements PluginRepository {
 

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

@@ -24,7 +24,7 @@ import ro.fortsoft.pf4j.util.FileUtils;
  * The default implementation for PluginStatusProvider.
  *
  * @author Decebal Suiu
- * @author Mário Franco
+ * @author Mário Franco
  */
 public class DefaultPluginStatusProvider implements PluginStatusProvider {
 

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -26,7 +26,7 @@ import ro.fortsoft.pf4j.util.DirectedGraph;
 class DependencyResolver {
 
 	private static final Logger log = LoggerFactory.getLogger(DependencyResolver.class);
-	
+
     private List<PluginWrapper> plugins;
 
 	public DependencyResolver(List<PluginWrapper> plugins) {

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2013 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -14,14 +14,14 @@ package ro.fortsoft.pf4j;
 
 /**
  * Overwrite classes directories to "target/classes" and lib directories to "target/lib".
- *  
+ *
  * @author Decebal Suiu
  */
 public class DevelopmentPluginClasspath extends PluginClasspath {
 
 	private static final String DEVELOPMENT_CLASSES_DIRECTORY = "target/classes";
 	private static final String DEVELOPMENT_LIB_DIRECTORY = "target/lib";
-	
+
 	public DevelopmentPluginClasspath() {
 		super();
 	}
@@ -32,5 +32,5 @@ public class DevelopmentPluginClasspath extends PluginClasspath {
 		libDirectories.add(DEVELOPMENT_LIB_DIRECTORY);
 	}
 
-	
+
 }

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -28,5 +28,5 @@ import java.lang.annotation.Target;
 public @interface Extension {
 
 	 int ordinal() default 0;
-	 
+
 }

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

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

@@ -52,4 +52,4 @@ public class ExtensionWrapper<T> implements Comparable<ExtensionWrapper<T>> {
         this.extensionFactory = extensionFactory;
     }
 
-}
+}

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2013 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -37,9 +37,9 @@ import javax.tools.StandardLocation;
 public class ExtensionsIndexer extends AbstractProcessor {
 
 	public static final String EXTENSIONS_RESOURCE = "META-INF/extensions.idx";
-	
+
 	private List<TypeElement> extensions = new ArrayList<TypeElement>();
-	
+
 	@Override
 	public SourceVersion getSupportedSourceVersion() {
 		return SourceVersion.latest();
@@ -49,16 +49,16 @@ public class ExtensionsIndexer extends AbstractProcessor {
 	public Set<String> getSupportedAnnotationTypes() {
 		Set<String> annotationTypes = new HashSet<String>();
         annotationTypes.add(Extension.class.getName());
-        
+
         return annotationTypes;
 	}
-	
+
 	@Override
 	public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
 		if (roundEnv.processingOver()) {
             return false;
         }
-		
+
 		for (Element element : roundEnv.getElementsAnnotatedWith(Extension.class)) {
 			if (!(element instanceof TypeElement)) {
 				continue;
@@ -69,7 +69,7 @@ public class ExtensionsIndexer extends AbstractProcessor {
 			processingEnv.getMessager().printMessage(Kind.NOTE, message);
 			extensions.add(typeElement);
         }
-		
+
 		/*
 		if (!roundEnv.processingOver()) {
 			return false;
@@ -77,17 +77,17 @@ public class ExtensionsIndexer extends AbstractProcessor {
 		*/
 
 		write();
-		
+
 		return false;
 //		return true; // no further processing of this annotation type
 	}
-	
+
 	private void write() {
 		Set<String> entries = new HashSet<String>();
 		for (TypeElement typeElement : extensions) {
 			entries.add(processingEnv.getElementUtils().getBinaryName(typeElement).toString());
 		}
-		
+
 		read(entries); // read old entries
 		write(entries); // write entries
 	}
@@ -107,7 +107,7 @@ public class ExtensionsIndexer extends AbstractProcessor {
 			processingEnv.getMessager().printMessage(Kind.ERROR, e.toString());
 		}
 	}
-	
+
 	private void read(Set<String> entries) {
 		try {
 			FileObject file = processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, "", EXTENSIONS_RESOURCE);
@@ -119,17 +119,17 @@ public class ExtensionsIndexer extends AbstractProcessor {
 			// java6 does not support reading old index files
 		}
 	}
-	
+
 	public static void readIndex(Reader reader, Set<String> entries) throws IOException {
 		BufferedReader bufferedReader = new BufferedReader(reader);
-		
+
 		String line;
 		while ((line = bufferedReader.readLine()) != null) {
 			entries.add(line);
 		}
-		
+
 		reader.close();
 	}
-	
+
 }
- 
+

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -18,11 +18,11 @@ import java.io.File;
  * Find a plugin descriptor in a directory (plugin repository).
  * You can find in manifest file @see DefaultPluginDescriptorFinder,
  * xml file, properties file, java services (with ServiceLoader), etc.
- * 
+ *
  * @author Decebal Suiu
  */
 public interface PluginDescriptorFinder {
 
 	public PluginDescriptor find(File pluginRepository) throws PluginException;
-	
+
 }

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -18,12 +18,12 @@ package ro.fortsoft.pf4j;
 class PluginNotFoundException extends PluginException {
 
 	private static final long serialVersionUID = 1L;
-	
+
 	private String pluginId;
 
 	public PluginNotFoundException(String pluginId) {
 		super("Plugin '" + pluginId + "' not found.");
-		
+
 		this.pluginId = pluginId;
 	}
 

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

@@ -19,7 +19,7 @@ import java.util.List;
  * Directory whose contents are .zip files used as plugins.
  *
  * @author Decebal Suiu
- * @author Mário Franco
+ * @author Mário Franco
  */
 public interface PluginRepository {
 

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

@@ -14,7 +14,7 @@ package ro.fortsoft.pf4j;
 
 /**
  * @author Decebal Suiu
- * @author Mário Franco
+ * @author Mário Franco
  */
 public interface PluginStatusProvider {
 

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

@@ -1,11 +1,11 @@
 /*
  * Copyright 2013 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -20,20 +20,20 @@ import java.util.NoSuchElementException;
  * @author Decebal Suiu
  */
 public enum RuntimeMode {
-	
+
 	DEVELOPMENT("development"), // development
-    DEPLOYMENT("deployment"); // deployment		
+    DEPLOYMENT("deployment"); // deployment
 
     private final String name;
-    
+
 	private static final Map<String, RuntimeMode> map = new HashMap<String, RuntimeMode>();
-	
+
 	static {
 		for (RuntimeMode mode : RuntimeMode.values()) {
 			map.put(mode.name, mode);
 		}
 	}
-	
+
 	private RuntimeMode(final String name) {
         this.name = name;
     }
@@ -42,14 +42,14 @@ public enum RuntimeMode {
     public String toString() {
         return name;
     }
-	
+
     public static RuntimeMode byName(String name) {
     	if (map.containsKey(name)) {
     		return map.get(name);
     	}
 
-    	throw new NoSuchElementException("Cannot found PF4J runtime mode with name '" + name + 
+    	throw new NoSuchElementException("Cannot found PF4J runtime mode with name '" + name +
     			"'. Must be 'development' or 'deployment'.");
     }
-    
-}
+
+}

pf4j/src/main/java/ro/fortsoft/pf4j/util/AndFileFilter.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2013 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

pf4j/src/main/java/ro/fortsoft/pf4j/util/DirectedGraph.java

@@ -1,171 +1,171 @@
-/*
- * Copyright 2012 Decebal Suiu
- * 
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
- * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
- * http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
- * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- */
-package ro.fortsoft.pf4j.util;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Stack;
-
-/**
- * @author Decebal Suiu
- */
-public class DirectedGraph<V> {
-
-    /**
-     * The implementation here is basically an adjacency list, but instead
-     * of an array of lists, a Map is used to map each vertex to its list of
-     * adjacent vertices.
-     */
-    private Map<V, List<V>> neighbors = new HashMap<V, List<V>>();
-
-    /**
-     * Add a vertex to the graph. Nothing happens if vertex is already in graph.
-     */
-    public void addVertex(V vertex) {
-        if (neighbors.containsKey(vertex)) {
-        	return;
-        }
-        neighbors.put(vertex, new ArrayList<V>());
-    }
-
-    /**
-     * True if graph contains vertex.
-     */
-    public boolean containsVertex(V vertex) {
-        return neighbors.containsKey(vertex);
-    }
-
-    /**
-     * Add an edge to the graph; if either vertex does not exist, it's added.
-     * This implementation allows the creation of multi-edges and self-loops.
-     */
-    public void addEdge(V from, V to) {
-        this.addVertex(from);
-        this.addVertex(to);
-        neighbors.get(from).add(to);
-    }
-
-    /**
-     * Remove an edge from the graph. Nothing happens if no such edge.
-     * @throws IllegalArgumentException if either vertex doesn't exist.
-     */
-    public void remove(V from, V to) {
-        if (!(this.containsVertex(from) && this.containsVertex(to))) {
-            throw new IllegalArgumentException("Nonexistent vertex");
-        }
-        neighbors.get(from).remove(to);
-    }
-
-    /**
-     * Report (as a Map) the out-degree of each vertex.
-     */
-    public Map<V, Integer> outDegree() {
-        Map<V, Integer> result = new HashMap<V, Integer>();
-        for (V vertex : neighbors.keySet()) {
-        	result.put(vertex, neighbors.get(vertex).size());
-        }
-
-        return result;
-    }
-
-    /**
-     * Report (as a Map) the in-degree of each vertex.
-     */
-    public Map<V,Integer> inDegree() {
-        Map<V, Integer> result = new HashMap<V, Integer>();
-        for (V vertex : neighbors.keySet()) {
-        	result.put(vertex, 0); // all in-degrees are 0
-        }
-        for (V from : neighbors.keySet()) {
-            for (V to : neighbors.get(from)) {
-                result.put(to, result.get(to) + 1); // increment in-degree
-            }
-        }
-
-        return result;
-    }
-
-    /**
-     * Report (as a List) the topological sort of the vertices; null for no such sort.
-     */
-    public List<V> topologicalSort() {
-        Map<V, Integer> degree = inDegree();
-
-        // determine all vertices with zero in-degree
-        Stack<V> zeroVertices = new Stack<V>(); // stack as good as any here
-        for (V v : degree.keySet()) {
-            if (degree.get(v) == 0) {
-            	zeroVertices.push(v);
-            }
-        }
-
-        // determine the topological order
-        List<V> result = new ArrayList<V>();
-        while (!zeroVertices.isEmpty()) {
-            V vertex = zeroVertices.pop(); // choose a vertex with zero in-degree
-            result.add(vertex); // vertex 'v' is next in topological order
-            // "remove" vertex 'v' by updating its neighbors
-            for (V neighbor : neighbors.get(vertex)) {
-                degree.put(neighbor, degree.get(neighbor) - 1);
-                // remember any vertices that now have zero in-degree
-                if (degree.get(neighbor) == 0) {
-                	zeroVertices.push(neighbor);
-                }
-            }
-        }
-
-        // check that we have used the entire graph (if not, there was a cycle)
-        if (result.size() != neighbors.size()) {
-        	return null;
-        }
-
-        return result;
-    }
-
-    /**
-     * Report (as a List) the reverse topological sort of the vertices; null for no such sort.
-     */
-    public List<V> reverseTopologicalSort() {
-    	List<V> list = topologicalSort();
-    	if (list == null) {
-    		return null;
-    	}
-    	Collections.reverse(list);
-
-    	return list;
-    }
-
-    /**
-     * True if graph is a dag (directed acyclic graph).
-     */
-    public boolean isDag () {
-        return topologicalSort() != null;
-    }
-
-    /**
-     * String representation of graph.
-     */
-    @Override
-    public String toString() {
-        StringBuffer sb = new StringBuffer();
-        for (V vertex : neighbors.keySet()) {
-        	sb.append("\n   " + vertex + " -> " + neighbors.get(vertex));
-        }
-
-        return sb.toString();
-    }
-
-}
+/*
+ * Copyright 2012 Decebal Suiu
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
+ * the License. You may obtain a copy of the License in the LICENSE file, or at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package ro.fortsoft.pf4j.util;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Stack;
+
+/**
+ * @author Decebal Suiu
+ */
+public class DirectedGraph<V> {
+
+    /**
+     * The implementation here is basically an adjacency list, but instead
+     * of an array of lists, a Map is used to map each vertex to its list of
+     * adjacent vertices.
+     */
+    private Map<V, List<V>> neighbors = new HashMap<V, List<V>>();
+
+    /**
+     * Add a vertex to the graph. Nothing happens if vertex is already in graph.
+     */
+    public void addVertex(V vertex) {
+        if (neighbors.containsKey(vertex)) {
+        	return;
+        }
+        neighbors.put(vertex, new ArrayList<V>());
+    }
+
+    /**
+     * True if graph contains vertex.
+     */
+    public boolean containsVertex(V vertex) {
+        return neighbors.containsKey(vertex);
+    }
+
+    /**
+     * Add an edge to the graph; if either vertex does not exist, it's added.
+     * This implementation allows the creation of multi-edges and self-loops.
+     */
+    public void addEdge(V from, V to) {
+        this.addVertex(from);
+        this.addVertex(to);
+        neighbors.get(from).add(to);
+    }
+
+    /**
+     * Remove an edge from the graph. Nothing happens if no such edge.
+     * @throws IllegalArgumentException if either vertex doesn't exist.
+     */
+    public void remove(V from, V to) {
+        if (!(this.containsVertex(from) && this.containsVertex(to))) {
+            throw new IllegalArgumentException("Nonexistent vertex");
+        }
+        neighbors.get(from).remove(to);
+    }
+
+    /**
+     * Report (as a Map) the out-degree of each vertex.
+     */
+    public Map<V, Integer> outDegree() {
+        Map<V, Integer> result = new HashMap<V, Integer>();
+        for (V vertex : neighbors.keySet()) {
+        	result.put(vertex, neighbors.get(vertex).size());
+        }
+
+        return result;
+    }
+
+    /**
+     * Report (as a Map) the in-degree of each vertex.
+     */
+    public Map<V,Integer> inDegree() {
+        Map<V, Integer> result = new HashMap<V, Integer>();
+        for (V vertex : neighbors.keySet()) {
+        	result.put(vertex, 0); // all in-degrees are 0
+        }
+        for (V from : neighbors.keySet()) {
+            for (V to : neighbors.get(from)) {
+                result.put(to, result.get(to) + 1); // increment in-degree
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * Report (as a List) the topological sort of the vertices; null for no such sort.
+     */
+    public List<V> topologicalSort() {
+        Map<V, Integer> degree = inDegree();
+
+        // determine all vertices with zero in-degree
+        Stack<V> zeroVertices = new Stack<V>(); // stack as good as any here
+        for (V v : degree.keySet()) {
+            if (degree.get(v) == 0) {
+            	zeroVertices.push(v);
+            }
+        }
+
+        // determine the topological order
+        List<V> result = new ArrayList<V>();
+        while (!zeroVertices.isEmpty()) {
+            V vertex = zeroVertices.pop(); // choose a vertex with zero in-degree
+            result.add(vertex); // vertex 'v' is next in topological order
+            // "remove" vertex 'v' by updating its neighbors
+            for (V neighbor : neighbors.get(vertex)) {
+                degree.put(neighbor, degree.get(neighbor) - 1);
+                // remember any vertices that now have zero in-degree
+                if (degree.get(neighbor) == 0) {
+                	zeroVertices.push(neighbor);
+                }
+            }
+        }
+
+        // check that we have used the entire graph (if not, there was a cycle)
+        if (result.size() != neighbors.size()) {
+        	return null;
+        }
+
+        return result;
+    }
+
+    /**
+     * Report (as a List) the reverse topological sort of the vertices; null for no such sort.
+     */
+    public List<V> reverseTopologicalSort() {
+    	List<V> list = topologicalSort();
+    	if (list == null) {
+    		return null;
+    	}
+    	Collections.reverse(list);
+
+    	return list;
+    }
+
+    /**
+     * True if graph is a dag (directed acyclic graph).
+     */
+    public boolean isDag () {
+        return topologicalSort() != null;
+    }
+
+    /**
+     * String representation of graph.
+     */
+    @Override
+    public String toString() {
+        StringBuffer sb = new StringBuffer();
+        for (V vertex : neighbors.keySet()) {
+        	sb.append("\n   " + vertex + " -> " + neighbors.get(vertex));
+        }
+
+        return sb.toString();
+    }
+
+}

pf4j/src/main/java/ro/fortsoft/pf4j/util/DirectoryFileFilter.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -17,7 +17,7 @@ import java.io.FileFilter;
 
 /**
  * Filter accepts files that are directories.
- * 
+ *
  * @author Decebal Suiu
  */
 public class DirectoryFileFilter implements FileFilter {

pf4j/src/main/java/ro/fortsoft/pf4j/util/ExtensionFileFilter.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -17,7 +17,7 @@ import java.io.FileFilter;
 
 /**
  * Filter accepts any file ending in extension. The case of the filename is ignored.
- * 
+ *
  * @author Decebal Suiu
  */
 public class ExtensionFileFilter implements FileFilter {

pf4j/src/main/java/ro/fortsoft/pf4j/util/HiddenFilter.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2013 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
@@ -17,7 +17,7 @@ import java.io.FileFilter;
 
 /**
  * Filter that only accepts hidden files.
- * 
+ *
  * @author decebal.suiu
  */
 public class HiddenFilter implements FileFilter {

pf4j/src/main/java/ro/fortsoft/pf4j/util/JarFileFilter.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

pf4j/src/main/java/ro/fortsoft/pf4j/util/NotFileFilter.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2013 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

pf4j/src/main/java/ro/fortsoft/pf4j/util/StringUtils.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

pf4j/src/main/java/ro/fortsoft/pf4j/util/Unzip.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.

pf4j/src/main/java/ro/fortsoft/pf4j/util/ZipFileFilter.java

@@ -1,11 +1,11 @@
 /*
  * Copyright 2012 Decebal Suiu
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
  * the License. You may obtain a copy of the License in the LICENSE file, or at:
- * 
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.