Add pnf simulator

Issue-ID: INT-458
Change-Id: I6fd6b58e5d302d83e4b4e1d1dfd59247a6df9700
Signed-off-by: Pawel Kadlubanski <pawel.kadlubanski@nokia.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/test/mocks/pnfsimulator/src/main/java/org/onap/pnfsimulator/simulator/validation/ParamsValidator.java b/test/mocks/pnfsimulator/src/main/java/org/onap/pnfsimulator/simulator/validation/ParamsValidator.java
new file mode 100644
index 000000000..a0fc110bd
--- /dev/null
+++ b/test/mocks/pnfsimulator/src/main/java/org/onap/pnfsimulator/simulator/validation/ParamsValidator.java
@@ -0,0 +1,82 @@
+package org.onap.pnfsimulator.simulator.validation;
+
+import static org.onap.pnfsimulator.message.MessageConstants.MESSAGE_INTERVAL;
+import static org.onap.pnfsimulator.message.MessageConstants.PNF_OAM_IPV4_ADDRESS;
+import static org.onap.pnfsimulator.message.MessageConstants.PNF_OAM_IPV6_ADDRESS;
+import static org.onap.pnfsimulator.message.MessageConstants.PNF_SERIAL_NUMBER;
+import static org.onap.pnfsimulator.message.MessageConstants.PNF_VENDOR_NAME;
+import static org.onap.pnfsimulator.message.MessageConstants.TEST_DURATION;
+
+import com.google.common.collect.ImmutableMap;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.BiPredicate;
+import org.apache.commons.lang3.StringUtils;
+import org.json.JSONObject;
+
+
+public class ParamsValidator {
+
+    private final static String MISSING_PARAMS_ERROR = "Some mandatory params are missing";
+    private static ParamsValidator instance;
+
+
+    public static ParamsValidator getInstance() {
+        if (instance == null) {
+            instance = new ParamsValidator();
+        }
+        return instance;
+    }
+
+    public void validate(JSONObject params) throws ValidationException {
+        ImmutableMap<String, BiPredicate<JSONObject, String>> paramValidators = ImmutableMap
+            .<String, BiPredicate<JSONObject, String>>builder()
+            .put(TEST_DURATION, this::isNotNumeric)
+            .put(MESSAGE_INTERVAL, this::isNotNumeric)
+            .put(PNF_SERIAL_NUMBER, this::nullOrEmpty)
+            .put(PNF_VENDOR_NAME, this::nullOrEmpty)
+            .put(PNF_OAM_IPV4_ADDRESS, this::nullOrEmpty)
+            .put(PNF_OAM_IPV6_ADDRESS, this::nullOrEmpty)
+            .build();
+
+        List<String> missingParams = new ArrayList<>();
+
+        paramValidators.forEach((param, validator) -> {
+            if (validator.test(params, param)) {
+                missingParams.add(param);
+            }
+        });
+
+        clearIPError(missingParams);
+        if (!missingParams.isEmpty()) {
+            throw new ValidationException(constructMessage(missingParams));
+        }
+    }
+
+    private String constructMessage(List<String> missingParams) {
+        StringBuilder msg = new StringBuilder(MISSING_PARAMS_ERROR);
+
+        missingParams.forEach(param -> {
+            msg.append('\n');
+            msg.append(param);
+        });
+
+        return msg.toString();
+    }
+
+    private boolean isNotNumeric(JSONObject params, String param) {
+        return nullOrEmpty(params, param) || !StringUtils.isNumeric(params.getString(param));
+    }
+
+    private boolean nullOrEmpty(JSONObject params, String param) {
+        return !params.has(param) || params.getString(param).isEmpty();
+    }
+
+    private void clearIPError(List<String> missingParams) {
+        // if only one IP is missing clear the error
+        if (!(missingParams.contains(PNF_OAM_IPV4_ADDRESS) && missingParams.contains(PNF_OAM_IPV6_ADDRESS))) {
+            missingParams.remove(PNF_OAM_IPV4_ADDRESS);
+            missingParams.remove(PNF_OAM_IPV6_ADDRESS);
+        }
+    }
+}