Improve error handling on unexpected 'postfix'

Issue-ID: CPS-450
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: Ia8be460f4235f7f0c24498f861dbe42137111772

3 files changed, 10 insertions, 1 deletions

diff --git a/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4 b/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4
index 86095459ee..a4fd58e9c0 100644
--- a/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4
+++ b/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4
@@ -25,7 +25,7 @@ ancestorAxis: SLASH KW_ANCESTOR COLONCOLON ancestorPath ;
 
 ancestorPath: yangElement (SLASH yangElement)* ;
 
-cpsPathWithSingleLeafCondition: prefix singleValueCondition ;
+cpsPathWithSingleLeafCondition: prefix singleValueCondition postfix? ;
 
 /*
 No need to ditinguish between cpsPathWithDescendant | cpsPathWithDescendantAndLeafConditions really!
@@ -40,6 +40,8 @@ descendant: SLASH prefix ;
 
 prefix: (SLASH yangElement)* SLASH containerName ;
 
+postfix: (SLASH yangElement)+ ;
+
 yangElement: containerName listElementRef? ;
 
 containerName: QName ;
diff --git a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java
index a67cbeb870..afe01f644c 100644
--- a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java
+++ b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java
@@ -28,6 +28,7 @@ import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.CpsPathWithDescendantCon
 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.CpsPathWithSingleLeafConditionContext;
 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.LeafConditionContext;
 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.MultipleValueConditionsContext;
+import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.PostfixContext;
 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.PrefixContext;
 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.SingleValueConditionContext;
 
@@ -43,6 +44,11 @@ public class CpsPathBuilder extends CpsPathBaseListener {
     }
 
     @Override
+    public void exitPostfix(final PostfixContext ctx) {
+        throw new IllegalStateException(String.format("Unsupported postfix %s encountered in CpsPath.", ctx.getText()));
+    }
+
+    @Override
     public void exitLeafCondition(final LeafConditionContext ctx) {
         Object comparisonValue = null;
         if (ctx.IntegerLiteral() != null) {
diff --git a/cps-path-parser/src/test/groovy/org/onap/cps/cpspath/parser/CpsPathQuerySpec.groovy b/cps-path-parser/src/test/groovy/org/onap/cps/cpspath/parser/CpsPathQuerySpec.groovy
index 0e7fc35cf4..116c9168e8 100644
--- a/cps-path-parser/src/test/groovy/org/onap/cps/cpspath/parser/CpsPathQuerySpec.groovy
+++ b/cps-path-parser/src/test/groovy/org/onap/cps/cpspath/parser/CpsPathQuerySpec.groovy
@@ -84,6 +84,7 @@ class CpsPathQuerySpec extends Specification {
             'end with descendant and more than one attribute separated by "or"' | '//child[@int-leaf=5 or @leaf-name="leaf value"]'
             'missing attribute value'                                           | '//child[@int-leaf=5 and @name]'
             'incomplete ancestor value'                                         | '//books/ancestor::'
+            'unsupported postfix after single value condition (JIRA CPS-450)'   | '/parent/child[@id=1]/somePostFix'
     }
 
     def 'Parse cps path using ancestor by schema node identifier with a #scenario.'() {