diff --git a/project_model/META-INF/plugin.xml b/project_model/META-INF/plugin.xml
index 1fe22e326..fe948d7a2 100644
--- a/project_model/META-INF/plugin.xml
+++ b/project_model/META-INF/plugin.xml
@@ -29,5 +29,9 @@
             description="Illustrates how to get source roots">
       <add-to-group group-id="ToolsMenu" anchor="after"/>
     </action>
+    <action id="ProjectModel.ProjectFileIndex" class="com.intellij.plugins.project.model.ProjectFileIndexSampleAction" text="FileProjectIndex in Action"
+            description="Illustrates how to get source roots">
+      <add-to-group group-id="EditorPopupMenu" anchor="last"/>
+    </action>
   </actions>
 </idea-plugin>
\ No newline at end of file
diff --git a/project_model/src/com/intellij/plugins/project/model/ProjectFileIndexSampleAction.java b/project_model/src/com/intellij/plugins/project/model/ProjectFileIndexSampleAction.java
new file mode 100644
index 000000000..a521d7f2e
--- /dev/null
+++ b/project_model/src/com/intellij/plugins/project/model/ProjectFileIndexSampleAction.java
@@ -0,0 +1,54 @@
+package com.intellij.plugins.project.model;
+
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.CommonDataKeys;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.fileEditor.FileDocumentManager;
+import com.intellij.openapi.module.Module;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.roots.ProjectFileIndex;
+import com.intellij.openapi.roots.ProjectRootManager;
+import com.intellij.openapi.ui.Messages;
+import com.intellij.openapi.vfs.VirtualFile;
+
+/**
+ * @author Anna Bulenkova
+ */
+public class ProjectFileIndexSampleAction extends AnAction {
+    @Override
+    public void update(final AnActionEvent event) {
+        Project project = event.getProject();
+        final Editor editor = event.getData(CommonDataKeys.EDITOR);
+        boolean visibility = project != null && editor != null;
+        event.getPresentation().setEnabledAndVisible(visibility);
+    }
+
+    @Override
+    public void actionPerformed(final AnActionEvent event) {
+        Project project = event.getProject();
+        final Editor editor = event.getData(CommonDataKeys.EDITOR);
+        if (project == null || editor == null) return;
+        Document document = editor.getDocument();
+        FileDocumentManager fileDocumentManager = FileDocumentManager.getInstance();
+        VirtualFile virtualFile = fileDocumentManager.getFile(document);
+        ProjectFileIndex projectFileIndex = ProjectRootManager.getInstance(project).getFileIndex();
+        if (virtualFile != null) {
+            Module module = projectFileIndex.getModuleForFile(virtualFile);
+            String moduleName;
+            moduleName = module != null ? module.getName() : "No module defined for file";
+
+            VirtualFile moduleContentRoot = projectFileIndex.getContentRootForFile(virtualFile);
+            boolean isLibraryFile = projectFileIndex.isLibraryClassFile(virtualFile);
+            boolean isInLibraryClasses = projectFileIndex.isInLibraryClasses(virtualFile);
+            boolean isInLibrarySource = projectFileIndex.isInLibrarySource(virtualFile);
+            Messages.showInfoMessage("Module: " + moduleName + "\n" +
+                                     "Module content root: " + moduleContentRoot + "\n" +
+                                     "Is library file: " + isLibraryFile + "\n" +
+                                     "Is in library classes" + isInLibraryClasses +
+                                     "Is in library source" + isInLibrarySource,
+                                     "Main File Info for" + virtualFile.getName());
+        }
+    }
+}