Update tosca utils to remove code duplication

Refactored the ToscaUtils class to remove code duplication.

Issue-ID: POLICY-2315
Change-Id: Ic06a0881d1797dbb3c45ae1903a150fbda421e72
Signed-off-by: liamfallon <liam.fallon@est.tech>

1 files changed, 70 insertions, 53 deletions

diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/utils/ToscaUtils.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/utils/ToscaUtils.java
index 71158f0d1..5ba42fef5 100644
--- a/models-tosca/src/main/java/org/onap/policy/models/tosca/utils/ToscaUtils.java
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/utils/ToscaUtils.java
@@ -48,11 +48,7 @@ public final class ToscaUtils {
      * @param serviceTemplate the service template containing data types to be checked
      */
     public static void assertDataTypesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        String message = checkDataTypesExist(serviceTemplate);
-        if (message != null) {
-            LOGGER.warn(message);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, message);
-        }
+        assertExist(serviceTemplate, checkDataTypesExist());
     }
 
     /**
@@ -61,11 +57,7 @@ public final class ToscaUtils {
      * @param serviceTemplate the service template containing policy types to be checked
      */
     public static void assertPolicyTypesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        String message = checkPolicyTypesExist(serviceTemplate);
-        if (message != null) {
-            LOGGER.warn(message);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, message);
-        }
+        assertExist(serviceTemplate, checkPolicyTypesExist());
     }
 
     /**
@@ -74,11 +66,7 @@ public final class ToscaUtils {
      * @param serviceTemplate the service template containing policy types to be checked
      */
     public static void assertPoliciesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        String message = checkPoliciesExist(serviceTemplate);
-        if (message != null) {
-            LOGGER.warn(message);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, message);
-        }
+        assertExist(serviceTemplate, checkPoliciesExist());
     }
 
     /**
@@ -87,7 +75,7 @@ public final class ToscaUtils {
      * @param serviceTemplate the service template containing data types to be checked
      */
     public static boolean doDataTypesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        return checkDataTypesExist(serviceTemplate) == null;
+        return doExist(serviceTemplate, checkDataTypesExist());
     }
 
     /**
@@ -96,7 +84,7 @@ public final class ToscaUtils {
      * @param serviceTemplate the service template containing policy types to be checked
      */
     public static boolean doPolicyTypesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        return checkPolicyTypesExist(serviceTemplate) == null;
+        return doExist(serviceTemplate, checkPolicyTypesExist());
     }
 
     /**
@@ -105,61 +93,90 @@ public final class ToscaUtils {
      * @param serviceTemplate the service template containing policy types to be checked
      */
     public static boolean doPoliciesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        return checkPoliciesExist(serviceTemplate) == null;
+        return doExist(serviceTemplate, checkPoliciesExist());
     }
 
     /**
-     * Check if data types have been specified correctly.
+     * Assert that something have been specified correctly.
      *
-     * @param serviceTemplate the service template containing data types to be checked
+     * @param serviceTemplate the service template containing policy types to be checked
      */
-    public static String checkDataTypesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        if (serviceTemplate.getDataTypes() == null) {
-            return "no data types specified on service template";
-        }
-
-        if (serviceTemplate.getDataTypes().getConceptMap().isEmpty()) {
-            return "list of data types specified on service template is empty";
+    public static void assertExist(final JpaToscaServiceTemplate serviceTemplate,
+            final ToscaChecker<JpaToscaServiceTemplate> checkerFunction) {
+        String message = checkerFunction.check(serviceTemplate);
+        if (message != null) {
+            LOGGER.warn(message);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, message);
         }
-
-        return null;
     }
 
     /**
-     * Check if policy types have been specified correctly.
+     * Check that something have been specified correctly.
      *
      * @param serviceTemplate the service template containing policy types to be checked
      */
-    public static String checkPolicyTypesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        if (serviceTemplate.getPolicyTypes() == null) {
-            return "no policy types specified on service template";
-        }
+    public static boolean doExist(final JpaToscaServiceTemplate serviceTemplate,
+            final ToscaChecker<JpaToscaServiceTemplate> checkerFunction) {
+        return checkerFunction.check(serviceTemplate) == null;
+    }
 
-        if (serviceTemplate.getPolicyTypes().getConceptMap().isEmpty()) {
-            return "list of policy types specified on service template is empty";
-        }
+    /**
+     * Check if data types have been specified correctly.
+     */
+    public static ToscaChecker<JpaToscaServiceTemplate> checkDataTypesExist() {
+        return serviceTemplate -> {
+            if (serviceTemplate.getDataTypes() == null) {
+                return "no data types specified on service template";
+            }
+
+            if (serviceTemplate.getDataTypes().getConceptMap().isEmpty()) {
+                return "list of data types specified on service template is empty";
+            }
+
+            return null;
+        };
+    }
 
-        return null;
+    /**
+     * Check if policy types have been specified correctly.
+     */
+    public static ToscaChecker<JpaToscaServiceTemplate> checkPolicyTypesExist() {
+        return serviceTemplate -> {
+            if (serviceTemplate.getPolicyTypes() == null) {
+                return "no policy types specified on service template";
+            }
+
+            if (serviceTemplate.getPolicyTypes().getConceptMap().isEmpty()) {
+                return "list of policy types specified on service template is empty";
+            }
+
+            return null;
+        };
     }
 
     /**
      * Check if policies have been specified correctly.
-     *
-     * @param serviceTemplate the service template containing policy types to be checked
      */
-    public static String checkPoliciesExist(final JpaToscaServiceTemplate serviceTemplate) {
-        if (serviceTemplate.getTopologyTemplate() == null) {
-            return "topology template not specified on service template";
-        }
-
-        if (serviceTemplate.getTopologyTemplate().getPolicies() == null) {
-            return "no policies specified on topology template of service template";
-        }
-
-        if (serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().isEmpty()) {
-            return "list of policies specified on topology template of service template is empty";
-        }
+    public static ToscaChecker<JpaToscaServiceTemplate> checkPoliciesExist() {
+        return serviceTemplate -> {
+            if (serviceTemplate.getTopologyTemplate() == null) {
+                return "topology template not specified on service template";
+            }
+
+            if (serviceTemplate.getTopologyTemplate().getPolicies() == null) {
+                return "no policies specified on topology template of service template";
+            }
+
+            if (serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().isEmpty()) {
+                return "list of policies specified on topology template of service template is empty";
+            }
+
+            return null;
+        };
+    }
 
-        return null;
+    @FunctionalInterface
+    interface ToscaChecker<T> {
+        String check(final T serviceTemplate);
     }
 }