extract method: avoid invalid elements (IDEA-112311)

java/java-tests/testData/refactoring/extractMethod/Expression.java

@@ -0,0 +1,35 @@
+public class AnnotationArgConverter {
+  public GrAnnotationMemberValue convert(PsiAnnotationMemberValue value) {
+    final StringBuilder buffer = new StringBuilder();
+
+    buffer.append("@A(");
+     
+    <selection>value.accept(new JavaElementVisitor() {
+      @Override
+      public void visitExpression(PsiExpression expression) {
+        buffer.append(expression.getText());
+      }
+
+      @Override
+      public void visitNewExpression(PsiNewExpression expression) {
+        PsiArrayInitializerExpression arrayInitializer = expression.getArrayInitializer();
+        if (arrayInitializer == null) {
+          super.visitNewExpression(expression);
+        }
+        else {
+          buffer.append(")");
+        }
+      }
+
+    })</selection>;
+
+    buffer.append(")");
+
+    try {
+      return GroovyPsiElementFactory.getInstance(value.getProject()).createAnnotationFromText(buffer.toString());
+    }
+    catch (IncorrectOperationException e) {
+      return null;
+    }
+  }
+}