From 229411100dabcf1536a5c5036f6c35f613a8fe5b Mon Sep 17 00:00:00 2001
From: tarilabs <matteo.mortari@gmail.com>
Date: Fri, 24 Feb 2017 22:56:47 +0100
Subject: [PATCH] DROOLS-1447 Fix FEELParser.isVariableNameValid() for empty
 string (#42)

---
 .../dmn/feel/parser/feel11/FEELParser.java    |  2 +-
 .../org/kie/dmn/validation/ValidatorTest.java | 14 ++++++++++
 .../org/kie/dmn/validation/DROOLS-1447.dmn    | 28 +++++++++++++++++++
 3 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 kie-dmn/kie-dmn-validation/src/test/resources/org/kie/dmn/validation/DROOLS-1447.dmn

diff --git a/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/parser/feel11/FEELParser.java b/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/parser/feel11/FEELParser.java
index e77f92d..c5d9d6f 100644
--- a/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/parser/feel11/FEELParser.java
+++ b/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/parser/feel11/FEELParser.java
@@ -45,7 +45,7 @@ public static FEEL_1_1Parser parse(FEELEventListenersManager eventsManager, Stri
     }
 
     public static boolean isVariableNameValid( String source ) {
-        if( source == null ) {
+        if( source == null || source.isEmpty() ) {
             return false;
         }
         ANTLRInputStream input = new ANTLRInputStream(source);
diff --git a/kie-dmn/kie-dmn-validation/src/test/java/org/kie/dmn/validation/ValidatorTest.java b/kie-dmn/kie-dmn-validation/src/test/java/org/kie/dmn/validation/ValidatorTest.java
index 6f81e76..2486894 100644
--- a/kie-dmn/kie-dmn-validation/src/test/java/org/kie/dmn/validation/ValidatorTest.java
+++ b/kie-dmn/kie-dmn-validation/src/test/java/org/kie/dmn/validation/ValidatorTest.java
@@ -36,6 +36,7 @@
 import org.kie.dmn.core.util.DMNRuntimeUtil;
 import org.kie.dmn.feel.model.v1_1.DMNModelInstrumentedBase;
 import org.kie.dmn.feel.model.v1_1.Definitions;
+import org.kie.dmn.feel.parser.feel11.FEELParser;
 import org.kie.dmn.validation.Msg;
 import org.kie.dmn.validation.ValidationMsg;
 import org.kie.dmn.validation.DMNValidator;
@@ -378,4 +379,17 @@ public void testTYPEREF_NOT_FEEL_NOT_DEF_valid() {
         
         assertTrue( validate.stream().noneMatch( p -> p.getMessage().equals( Msg.TYPEREF_NOT_FEEL_NOT_DEF ) ) );
     }
+    
+    @Test
+    public void testNAME_INVALID_empty_name() {
+        assertFalse( FEELParser.isVariableNameValid(null) );
+        
+        // DROOLS-1447
+        assertFalse( FEELParser.isVariableNameValid("")   );
+        
+        Definitions definitions = utilDefinitions( "DROOLS-1447.dmn", "DROOLS-1447" );
+        List<ValidationMsg> validate = validator.validateModel(definitions);
+
+        assertTrue( validate.stream().anyMatch( p -> p.getMessage().equals( Msg.NAME_INVALID ) ) );
+    }
 }
diff --git a/kie-dmn/kie-dmn-validation/src/test/resources/org/kie/dmn/validation/DROOLS-1447.dmn b/kie-dmn/kie-dmn-validation/src/test/resources/org/kie/dmn/validation/DROOLS-1447.dmn
new file mode 100644
index 0000000..1509352
--- /dev/null
+++ b/kie-dmn/kie-dmn-validation/src/test/resources/org/kie/dmn/validation/DROOLS-1447.dmn
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2016 Red Hat, Inc. and/or its affiliates.
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License 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.
+  -->
+<definitions id="DROOLS-1447" name="DROOLS-1447"
+  namespace="https://github.com/droolsjbpm/kie-dmn" xmlns="http://www.omg.org/spec/DMN/20151101/dmn.xsd"
+  xmlns:feel="http://www.omg.org/spec/FEEL/20140401" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.omg.org/spec/DMN/20151101/dmn.xsd http://www.omg.org/spec/DMN/20151101/dmn.xsd ">
+  <extensionElements />
+  <decision id="_c7523fa1-22af-4673-8990-fdf920b35667" name="Decision Logic 1">
+    <variable id="_b1e4588e-9ce1-4474-8e4e-48dbcdb7524b" name="Decision Logic 1" />
+  </decision>
+  <decision id="_5e43b55c-888e-443c-b1b9-80e4aa6746bd" name="">
+    <variable id="_cd52910c-65e5-448d-8e60-1912b5db849e" name="" />
+  </decision>
+</definitions>