Add description to parameters in policy controller

Change-Id: Ib09bd36c6f0a78ac298671f54071ecededac2191
Issue-ID: NONRTRIC-158
Signed-off-by: maximesson <maxime.bonneau@est.tech>
diff --git a/policy-agent/docs/api.yaml b/policy-agent/docs/api.yaml
index f3dd06c..5de8b29 100644
--- a/policy-agent/docs/api.yaml
+++ b/policy-agent/docs/api.yaml
@@ -26,19 +26,22 @@
       parameters:
         - name: ric
           in: query
-          description: ric
+          description: The name of the Near-RT RIC to get policies for.
           required: false
           type: string
+          allowEmptyValue: false
         - name: service
           in: query
-          description: service
+          description: The name of the service to get policies for.
           required: false
           type: string
+          allowEmptyValue: false
         - name: type
           in: query
-          description: type
+          description: The name of the policy type to get policies for.
           required: false
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policies
@@ -66,9 +69,10 @@
       parameters:
         - name: id
           in: query
-          description: id
+          description: The ID of the policy instance.
           required: true
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policy found
@@ -93,9 +97,10 @@
       parameters:
         - name: id
           in: query
-          description: id
+          description: The ID of the policy instance.
           required: true
           type: string
+          allowEmptyValue: false
         - in: body
           name: jsonBody
           description: jsonBody
@@ -104,25 +109,30 @@
             type: object
         - name: ric
           in: query
-          description: ric
+          description: The name of the Near-RT RIC where the policy will be created.
           required: true
           type: string
+          allowEmptyValue: false
         - name: service
           in: query
-          description: service
+          description: The name of the service creating the policy.
           required: true
           type: string
+          allowEmptyValue: false
         - name: transient
           in: query
-          description: transient
+          description: If the policy is transient or not (boolean defaulted to false). A policy is transient if it will be forgotten when the service needs to reconnect to the Near-RT RIC.
           required: false
           type: boolean
           default: false
+          allowEmptyValue: false
+          x-example: false
         - name: type
           in: query
-          description: type
+          description: The name of the policy type.
           required: false
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policy updated
@@ -155,9 +165,10 @@
       parameters:
         - name: id
           in: query
-          description: id
+          description: The ID of the policy instance.
           required: true
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: OK
@@ -191,19 +202,22 @@
       parameters:
         - name: ric
           in: query
-          description: ric
+          description: The name of the Near-RT RIC to get policies for.
           required: false
           type: string
+          allowEmptyValue: false
         - name: service
           in: query
-          description: service
+          description: The name of the service to get policies for.
           required: false
           type: string
+          allowEmptyValue: false
         - name: type
           in: query
-          description: type
+          description: The name of the policy type to get policies for.
           required: false
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policy ids
@@ -231,9 +245,10 @@
       parameters:
         - name: id
           in: query
-          description: id
+          description: The ID of the policy type to get the definition for.
           required: true
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policy schema
@@ -259,9 +274,10 @@
       parameters:
         - name: ric
           in: query
-          description: ric
+          description: The name of the Near-RT RIC to get the definitions for.
           required: false
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policy schemas
@@ -289,9 +305,10 @@
       parameters:
         - name: id
           in: query
-          description: id
+          description: The ID of the policy.
           required: true
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policy status
@@ -317,9 +334,10 @@
       parameters:
         - name: ric
           in: query
-          description: ric
+          description: The name of the Near-RT RIC to get types for.
           required: false
           type: string
+          allowEmptyValue: false
       responses:
         '200':
           description: Policy type names
@@ -625,4 +643,3 @@
         format: int64
         description: time since last invocation by the service
     title: ServiceStatus
-
diff --git a/policy-agent/src/main/java/org/oransc/policyagent/controllers/PolicyController.java b/policy-agent/src/main/java/org/oransc/policyagent/controllers/PolicyController.java
index 49d7702..017a9fd 100644
--- a/policy-agent/src/main/java/org/oransc/policyagent/controllers/PolicyController.java
+++ b/policy-agent/src/main/java/org/oransc/policyagent/controllers/PolicyController.java
@@ -25,6 +25,7 @@
 
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
 import io.swagger.annotations.ApiResponse;
 import io.swagger.annotations.ApiResponses;
 
@@ -98,7 +99,8 @@
         value = {
             @ApiResponse(code = 200, message = "Policy schemas", response = Object.class, responseContainer = "List"), //
             @ApiResponse(code = 404, message = "RIC is not found", response = String.class)})
-    public ResponseEntity<String> getPolicySchemas(@RequestParam(name = "ric", required = false) String ricName) {
+    public ResponseEntity<String> getPolicySchemas(@ApiParam(name = "ric", required = false, value = "The name of " +//
+        "the Near-RT RIC to get the definitions for.")@RequestParam(name = "ric", required = false) String ricName) {
         if (ricName == null) {
             Collection<PolicyType> types = this.policyTypes.getAll();
             return new ResponseEntity<>(toPolicyTypeSchemasJson(types), HttpStatus.OK);
@@ -118,7 +120,8 @@
         value = { //
             @ApiResponse(code = 200, message = "Policy schema", response = Object.class),
             @ApiResponse(code = 404, message = "RIC is not found", response = String.class)})
-    public ResponseEntity<String> getPolicySchema(@RequestParam(name = "id", required = true) String id) {
+    public ResponseEntity<String> getPolicySchema(@ApiParam(name = "id", required = true, value = "The ID of the " +//
+        "policy type to get the definition for.")@RequestParam(name = "id", required = true) String id) {
         try {
             PolicyType type = policyTypes.getType(id);
             return new ResponseEntity<>(type.schema(), HttpStatus.OK);
@@ -137,7 +140,8 @@
                 response = String.class,
                 responseContainer = "List"),
             @ApiResponse(code = 404, message = "RIC is not found", response = String.class)})
-    public ResponseEntity<String> getPolicyTypes(@RequestParam(name = "ric", required = false) String ricName) {
+    public ResponseEntity<String> getPolicyTypes(@ApiParam(name = "ric", required = false, value = "The name of " +//
+        "the Near-RT RIC to get types for.")@RequestParam(name = "ric", required = false) String ricName) {
         if (ricName == null) {
             Collection<PolicyType> types = this.policyTypes.getAll();
             return new ResponseEntity<>(toPolicyTypeIdsJson(types), HttpStatus.OK);
@@ -159,7 +163,8 @@
             @ApiResponse(code = 404, message = "Policy is not found")} //
     )
     public ResponseEntity<String> getPolicy( //
-        @RequestParam(name = "id", required = true) String id) {
+        @ApiParam(name = "id", required = true, value = "The ID of the policy instance.")@RequestParam(name = "id", //
+            required = true) String id) {
         try {
             Policy p = policies.getPolicy(id);
             return new ResponseEntity<>(p.json(), HttpStatus.OK);
@@ -176,7 +181,8 @@
             @ApiResponse(code = 404, message = "Policy is not found", response = String.class),
             @ApiResponse(code = 423, message = "RIC is not operational", response = String.class)})
     public Mono<ResponseEntity<Object>> deletePolicy( //
-        @RequestParam(name = "id", required = true) String id) {
+        @ApiParam(name = "id", required = true, value = "The ID of the policy instance.")@RequestParam(name = "id", //
+            required = true) String id) {
         try {
             Policy policy = policies.getPolicy(id);
             keepServiceAlive(policy.ownerServiceName());
@@ -205,11 +211,18 @@
             @ApiResponse(code = 404, message = "RIC or policy type is not found", response = String.class) //
         })
     public Mono<ResponseEntity<Object>> putPolicy( //
-        @RequestParam(name = "type", required = false, defaultValue = "") String typeName, //
-        @RequestParam(name = "id", required = true) String instanceId, //
-        @RequestParam(name = "ric", required = true) String ricName, //
-        @RequestParam(name = "service", required = true) String service, //
-        @RequestParam(name = "transient", required = false, defaultValue = "false") boolean isTransient, //
+        @ApiParam(name = "type", required = false, value = "The name of the policy type.") //
+            @RequestParam(name = "type", required = false, defaultValue = "") String typeName, //
+        @ApiParam(name = "id", required = true, value = "The ID of the policy instance.")@RequestParam(name = "id", //
+            required = true) String instanceId, //
+        @ApiParam(name = "ric", required = true, value = "The name of the Near-RT RIC where the policy will be " +//
+            "created.")@RequestParam(name = "ric", required = true) String ricName, //
+        @ApiParam(name = "service", required = true, value = "The name of the service creating the policy.") //
+            @RequestParam(name = "service", required = true) String service, //
+        @ApiParam(name = "transient", required = false, value = "If the policy is transient or not (boolean " +//
+            "defaulted to false). A policy is transient if it will be forgotten when the service needs to " +//
+            "reconnect to the Near-RT RIC.")@RequestParam(name = "transient", required = false, //
+            defaultValue = "false") boolean isTransient, //
         @RequestBody Object jsonBody) {
 
         String jsonString = gson.toJson(jsonBody);
@@ -300,9 +313,12 @@
             @ApiResponse(code = 200, message = "Policies", response = PolicyInfo.class, responseContainer = "List"),
             @ApiResponse(code = 404, message = "RIC or type not found", response = String.class)})
     public ResponseEntity<String> getPolicies( //
-        @RequestParam(name = "type", required = false) String type, //
-        @RequestParam(name = "ric", required = false) String ric, //
-        @RequestParam(name = "service", required = false) String service) //
+        @ApiParam(name = "type", required = false, value = "The name of the policy type to get policies for.") //
+            @RequestParam(name = "type", required = false) String type, //
+        @ApiParam(name = "ric", required = false, value = "The name of the Near-RT RIC to get policies for.") //
+            @RequestParam(name = "ric", required = false) String ric, //
+        @ApiParam(name = "service", required = false, value = "The name of the service to get policies for.") //
+            @RequestParam(name = "service", required = false) String service) //
     {
         if ((type != null && this.policyTypes.get(type) == null)) {
             return new ResponseEntity<>("Policy type not found", HttpStatus.NOT_FOUND);
@@ -321,9 +337,12 @@
         value = {@ApiResponse(code = 200, message = "Policy ids", response = String.class, responseContainer = "List"),
             @ApiResponse(code = 404, message = "RIC or type not found", response = String.class)})
     public ResponseEntity<String> getPolicyIds( //
-        @RequestParam(name = "type", required = false) String type, //
-        @RequestParam(name = "ric", required = false) String ric, //
-        @RequestParam(name = "service", required = false) String service) //
+        @ApiParam(name = "type", required = false, value = "The name of the policy type to get policies for.") //
+            @RequestParam(name = "type", required = false) String type, //
+        @ApiParam(name = "ric", required = false, value = "The name of the Near-RT RIC to get policies for.") //
+            @RequestParam(name = "ric", required = false) String ric, //
+        @ApiParam(name = "service", required = false, value = "The name of the service to get policies for.") //
+            @RequestParam(name = "service", required = false) String service) //
     {
         if ((type != null && this.policyTypes.get(type) == null)) {
             return new ResponseEntity<>("Policy type not found", HttpStatus.NOT_FOUND);
@@ -344,7 +363,8 @@
             @ApiResponse(code = 404, message = "Policy is not found", response = String.class)} //
     )
     public Mono<ResponseEntity<String>> getPolicyStatus( //
-        @RequestParam(name = "id", required = true) String id) {
+        @ApiParam(name = "id", required = true, value = "The ID of the policy.")@RequestParam(name = "id", //
+            required = true) String id) {
         try {
             Policy policy = policies.getPolicy(id);