From b44ed1ec2933fd7d0536370f449ed838ce5edeeb Mon Sep 17 00:00:00 2001
From: Daniil Ovchinnikov <daniil.ovchinnikov@jetbrains.com>
Date: Tue, 11 Jul 2017 18:39:19 +0300
Subject: [PATCH] [groovy] validate class name in New Class dialog
 (IDEA-175434)

---
 .../groovy/actions/NewGroovyClassAction.java  | 23 +++++++++++++++----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/actions/NewGroovyClassAction.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/actions/NewGroovyClassAction.java
index 4f0c451f5214..2a86b5ac5202 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/actions/NewGroovyClassAction.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/actions/NewGroovyClassAction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2016 JetBrains s.r.o.
+ * Copyright 2000-2017 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,10 +31,9 @@ import com.intellij.openapi.project.DumbAware;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.ProjectFileIndex;
 import com.intellij.openapi.roots.ProjectRootManager;
-import com.intellij.psi.JavaDirectoryService;
-import com.intellij.psi.PsiDirectory;
-import com.intellij.psi.PsiElement;
-import com.intellij.psi.PsiFile;
+import com.intellij.openapi.ui.InputValidatorEx;
+import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.psi.*;
 import com.intellij.psi.codeStyle.CodeStyleManager;
 import com.intellij.util.IncorrectOperationException;
 import icons.JetgroovyIcons;
@@ -76,6 +75,20 @@ public class NewGroovyClassAction extends JavaCreateTemplateInPackageAction<GrTy
         builder.addKind(template.getName(), JetgroovyIcons.Groovy.Class, template.getName());
       }
     }
+
+    builder.setValidator(new InputValidatorEx() {
+
+      @Override
+      public String getErrorText(String inputString) { return "This is not a valid Groovy qualified name"; }
+
+      @Override
+      public boolean checkInput(String inputString) { return true; }
+
+      @Override
+      public boolean canClose(String inputString) {
+        return !StringUtil.isEmptyOrSpaces(inputString) && PsiNameHelper.getInstance(project).isQualifiedName(inputString);
+      }
+    });
   }
 
   @Override