1 files changed, 36 insertions, 0 deletions
diff --git a/services/services-engine/src/main/java/org/onap/policy/apex/service/parameters/ApexParameterValidator.java b/services/services-engine/src/main/java/org/onap/policy/apex/service/parameters/ApexParameterValidator.java
new file mode 100644
index 000000000..a8cbe3b46
--- /dev/null
+++ b/services/services-engine/src/main/java/org/onap/policy/apex/service/parameters/ApexParameterValidator.java
@@ -0,0 +1,36 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.service.parameters;
+
+/**
+ * This interface is implemented by Apex parameter classes so that they can be validated.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public interface ApexParameterValidator {
+    /**
+     * Validate a parameter java bean, if the parameter bean is valid, an empty string is returned,
+     * otherwise the string gives details of the invalid parameters.
+     *
+     * @return the string with validation errors
+     */
+    String validate();
+}