Externalize AssignPnf Building Block and refactor existing code accordingly

Issue-ID: SO-2568
Change-Id: I1eec15862d6f0b5e8ae4c952b290be8d5fc786dd
Signed-off-by: Remigiusz Janeczek <remigiusz.janeczek@nokia.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/delegate/AssignPnfInputsCheckerDelegate.java b/bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/delegate/AssignPnfInputsCheckerDelegate.java
new file mode 100644
index 0000000000..9176948288
--- /dev/null
+++ b/bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/delegate/AssignPnfInputsCheckerDelegate.java
@@ -0,0 +1,40 @@
+package org.onap.so.bpmn.infrastructure.pnf.delegate;
+
+import static org.onap.so.bpmn.infrastructure.pnf.delegate.ExecutionVariableNames.PNF_CORRELATION_ID;
+import static org.onap.so.bpmn.infrastructure.pnf.delegate.ExecutionVariableNames.PNF_UUID;
+import com.google.common.base.Strings;
+import org.camunda.bpm.engine.delegate.DelegateExecution;
+import org.camunda.bpm.engine.delegate.JavaDelegate;
+import org.onap.so.bpmn.common.scripts.ExceptionUtil;
+import org.springframework.stereotype.Component;
+
+@Component
+public class AssignPnfInputsCheckerDelegate implements JavaDelegate {
+
+    public static final String UUID_REGEX =
+            "(?i)^[0-9a-f]{8}-[0-9a-f]{4}-[1-5]{1}[0-9a-f]{3}-[89ab]{1}[0-9a-f]{3}-[0-9a-f]{12}$";
+
+    @Override
+    public void execute(DelegateExecution execution) {
+        validatePnfCorrelationId(execution);
+        validatePnfUuid(execution);
+    }
+
+    private void validatePnfCorrelationId(DelegateExecution execution) {
+        String pnfCorrelationId = (String) execution.getVariable(PNF_CORRELATION_ID);
+        if (Strings.isNullOrEmpty(pnfCorrelationId)) {
+            new ExceptionUtil().buildAndThrowWorkflowException(execution, 9999,
+                    "pnfCorrelationId variable not defined");
+        }
+    }
+
+    private void validatePnfUuid(DelegateExecution execution) {
+        String pnfUuid = (String) execution.getVariable(PNF_UUID);
+        if (Strings.isNullOrEmpty(pnfUuid)) {
+            new ExceptionUtil().buildAndThrowWorkflowException(execution, 9999, "pnfUuid variable not defined");
+        }
+        if (!pnfUuid.matches(UUID_REGEX)) {
+            new ExceptionUtil().buildAndThrowWorkflowException(execution, 9999, "pnfUuid is not a valid UUID");
+        }
+    }
+}