XACML to accept properties as null

xacml-pdp expects the property map to exist in all policies, even if it
is sometimes empty. Now, the propperty map can be null. The code is
updated to cope with a null property map.

Issue-ID: POLICY-2900
Change-Id: Ie31a2770aff1435a1d1064512d0c2fa2088d3183
Signed-off-by: liamfallon <liam.fallon@est.tech>

3 files changed, 4 insertions, 2 deletions

diff --git a/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplication.java b/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/native/NativePdpApplication.java
index f8248f1c..f8248f1c 100644
--- a/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplication.java
+++ b/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/native/NativePdpApplication.java
diff --git a/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTranslator.java b/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/native/NativePdpApplicationTranslator.java
index 5ce25fac..34ef1462 100644
--- a/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTranslator.java
+++ b/applications/native/src/main/java/org/onap/policy/xacml/pdp/application/native/NativePdpApplicationTranslator.java
@@ -3,6 +3,7 @@
  * ONAP
  * ================================================================================
  * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * Modifications Copyright (C) 2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,6 +31,7 @@ import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.Base64;
 import java.util.Map;
+import org.apache.commons.collections4.MapUtils;
 import org.onap.policy.models.decisions.concepts.DecisionRequest;
 import org.onap.policy.models.decisions.concepts.DecisionResponse;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
@@ -86,7 +88,7 @@ public class NativePdpApplicationTranslator implements ToscaPolicyTranslator {
     private String getNativeXacmlPolicy(ToscaPolicy toscaPolicy) throws ToscaPolicyConversionException {
 
         Map<String, Object> propertyMap = toscaPolicy.getProperties();
-        if (propertyMap.isEmpty() || !propertyMap.containsKey(POLICY)) {
+        if (MapUtils.isEmpty(propertyMap) || !propertyMap.containsKey(POLICY)) {
             throw new ToscaPolicyConversionException("no xacml native policy found in the tosca policy");
         }
 
@@ -107,4 +109,4 @@ public class NativePdpApplicationTranslator implements ToscaPolicyTranslator {
         //
         return null;
     }
-}
\ No newline at end of file
+}
diff --git a/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java b/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/native/NativePdpApplicationTest.java
index f434e80f..f434e80f 100644
--- a/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java
+++ b/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/native/NativePdpApplicationTest.java