Create ParameterGroupImpl

Classes that implement ParameterGroup all have to add their own
name and validate() fields and methods.  Added an "impl" class that
provides the standard functionality and modified subclasses to use
it.

Change-Id: Ic6ee1607fb4fe7164a4e1eeebc480ea7d1e7e4d7
Issue-ID: POLICY-1542
Signed-off-by: Jim Hahn <jrh3@att.com>

2 files changed, 72 insertions, 17 deletions

diff --git a/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterGroupImpl.java b/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterGroupImpl.java
new file mode 100644
index 00000000..f0f34ac1
--- /dev/null
+++ b/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterGroupImpl.java
@@ -0,0 +1,61 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.parameters;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.onap.policy.common.parameters.annotations.NotBlank;
+import org.onap.policy.common.parameters.annotations.NotNull;
+
+/**
+ * Implementation of a parameter group.
+ */
+@NotNull
+@NotBlank
+@Getter
+@Setter
+public class ParameterGroupImpl implements ParameterGroup {
+    /**
+     * Group name. Note: this MUST not be "private" or it will not be validated.
+     */
+    protected String name;
+
+    /**
+     * Constructs the object, with a {@code null} name.
+     */
+    public ParameterGroupImpl() {
+        this.name = null;
+    }
+
+    /**
+     * Constructs the object.
+     *
+     * @param name the group's name
+     */
+    public ParameterGroupImpl(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public GroupValidationResult validate() {
+        return new GroupValidationResult(this);
+    }
+}
diff --git a/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterValidationResult.java b/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterValidationResult.java
index e43c2d17..57232e1c 100644
--- a/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterValidationResult.java
+++ b/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterValidationResult.java
@@ -49,12 +49,15 @@ public class ParameterValidationResult implements ValidationResult {
         this.field = field;
         this.parameterValue = parameterValue;
 
-        if (parameterValue == null && getAnyAnnotation(field, NotNull.class) != null) {
-            setResult(ValidationStatus.INVALID, "is null");
+        if (parameterValue == null) {
+            if (getAnyAnnotation(field, NotNull.class) != null) {
+                setResult(ValidationStatus.INVALID, "is null");
+            }
 
-        } else if (parameterValue instanceof String && getAnyAnnotation(field, NotBlank.class) != null
-                        && parameterValue.toString().trim().isEmpty()) {
-            setResult(ValidationStatus.INVALID, "must be a non-blank string");
+        } else if (parameterValue instanceof String) {
+            if (getAnyAnnotation(field, NotBlank.class) != null && parameterValue.toString().trim().isEmpty()) {
+                setResult(ValidationStatus.INVALID, "must be a non-blank string");
+            }
 
         } else if (parameterValue instanceof Number) {
             Min minAnnot = field.getAnnotation(Min.class);
@@ -66,7 +69,8 @@ public class ParameterValidationResult implements ValidationResult {
 
     /**
      * Gets an annotation for a field, first checking the field, itself, and then checking
-     * at the class level for the current and superclasses.
+     * at the class level. Does not check super classes as class-level annotations should
+     * only apply to the fields within the class.
      *
      * @param field field of interest
      * @param annotClass class of annotation that is desired
@@ -78,17 +82,7 @@ public class ParameterValidationResult implements ValidationResult {
             return annot;
         }
 
-        // check class level
-        Class<?> clazz = field.getDeclaringClass();
-        while (clazz != Object.class) {
-            if ((annot = clazz.getAnnotation(annotClass)) != null) {
-                return annot;
-            }
-
-            clazz = clazz.getSuperclass();
-        }
-
-        return null;
+        return field.getDeclaringClass().getAnnotation(annotClass);
     }
 
     /**