Merge pull request #878 from ymohdriz/branch_fix_parameter

Fix for issue 877

Author: gracekarina

modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/ResolverFully.java

@@ -49,6 +49,7 @@ public ResolverFully(boolean aggregateCombinators) {
     private Map<String, Schema> schemas;
     private Map<String, Schema> resolvedModels = new HashMap<>();
     private Map<String, Example> examples;
+    private Map<String, Parameter> parameters;
     private Map<String, RequestBody> requestBodies;
     private Map<String, Link> links;
 
@@ -74,10 +75,18 @@ public void resolveFully(OpenAPI openAPI) {
             }
         }
 
+
+        if (openAPI.getComponents() != null && openAPI.getComponents().getParameters() != null) {
+            parameters = openAPI.getComponents().getParameters();
+            if (parameters == null) {
+                parameters = new HashMap<>();
+            }
+        }
         if (openAPI.getComponents() != null && openAPI.getComponents().getLinks() != null) {
             links = openAPI.getComponents().getLinks();
             if (links == null) {
                 links = new HashMap<>();
+
             }
         }
 
@@ -94,6 +103,7 @@ public void resolvePath(PathItem pathItem){
             // inputs
             if (op.getParameters() != null) {
                 for (Parameter parameter : op.getParameters()) {
+                    parameter = parameter.get$ref() != null ? resolveParameter(parameter) : parameter;
                     if (parameter.getSchema() != null) {
                         Schema resolved = resolveSchema(parameter.getSchema());
                         if (resolved != null) {
@@ -202,6 +212,18 @@ public RequestBody resolveRequestBody(RequestBody requestBody){
         return requestBody;
     }
 
+    public Parameter resolveParameter(Parameter parameter){
+        String $ref = parameter.get$ref();
+        RefFormat refFormat = computeRefFormat($ref);
+        if (!isAnExternalRefFormat(refFormat)){
+            if (parameters != null && !parameters.isEmpty()) {
+                String referenceKey = computeDefinitionName($ref);
+                return parameters.getOrDefault(referenceKey, parameter);
+            }
+        }
+        return parameter;
+    }
+
     public Schema resolveSchema(Schema schema) {
         if(schema.get$ref() != null) {
             String ref= schema.get$ref();

modules/swagger-parser-v3/src/test/java/io/swagger/v3/parser/test/OpenAPIV3ParserTest.java

@@ -1538,6 +1538,17 @@ public void shouldParseRequestBody() {
         assertEquals(actualPathContent, actualComponentContent);
     }
 
+    @Test
+    public void shouldParseParameters() {
+        ParseOptions parseOptions = new ParseOptions();
+        parseOptions.setResolveFully(true);
+        OpenAPI openAPI = new OpenAPIV3Parser().read("src/test/resources/issue_877.yaml", null, parseOptions);
+        Parameter parameter = openAPI.getPaths().get("/adopt").getGet().getParameters().get(0);
+        assertNotNull(parameter);
+        assertEquals(parameter.getIn(), "path");
+        assertEquals(parameter.getName(), "playerId");
+    }
+  
     @Test
     public void testIssue884() {
         ParseOptions parseOptions = new ParseOptions();
@@ -1547,6 +1558,7 @@ public void testIssue884() {
         String operationId = links.get("userRepository").getOperationId();
         assertEquals(operationId, "getRepository");
     }
+  
     @Test
     public void testLinkIssue() {
         ParseOptions parseOptions = new ParseOptions();
@@ -1557,8 +1569,6 @@ public void testLinkIssue() {
         assertEquals(requestBody, "$response.body#/slug");
     }
 
-
-
     private static int getDynamicPort() {
         return new Random().ints(10000, 20000).findFirst().getAsInt();
     }

modules/swagger-parser-v3/src/test/resources/issue_877.yaml

@@ -0,0 +1,27 @@
+openapi: 3.0.0
+servers:
+- url: 'http://localhost:8000/v2/api'
+info:
+  version: 1.0.0
+  title: Swagger Petstore
+paths:
+  /adopt:
+    get:
+      tags:
+      - pet
+      summary: Find pet by ID
+      description: It gets pets
+      operationId: getPetById
+      parameters:
+        - $ref: '#/components/parameters/limit'
+      responses:
+        '200':
+          description: successful operation
+components:
+  parameters:
+    limit:
+      name: playerId
+      in: path
+      required: true
+      schema:
+        type: string