From cbac1579a9a779055dc4c31e9bf5ba5fe41df905 Mon Sep 17 00:00:00 2001
From: "akihito.nakano" <sora.akatsuki@gmail.com>
Date: Wed, 30 May 2018 19:17:08 +0900
Subject: [PATCH] set example value from parameter

---
 .../openapitools/codegen/DefaultCodegen.java  | 17 +++++++++++++-
 .../codegen/DefaultCodegenTest.java           | 12 ++++++++++
 .../src/test/resources/3_0/examples.yaml      | 23 +++++++++++++++++++
 3 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100644 modules/openapi-generator/src/test/resources/3_0/examples.yaml

diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index 7f09e70dc659..d3180c5e87ed 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -1082,6 +1082,21 @@ public void setParameterExampleValue(CodegenParameter codegenParameter) {
 
     }
 
+    /**
+     * Return the example value of the parameter.
+     *
+     * @param codegenParameter Codegen parameter
+     * @param parameter Parameter
+     */
+    public void setParameterExampleValue(CodegenParameter codegenParameter, Parameter parameter) {
+        if (parameter.getExample() != null) {
+            codegenParameter.example = parameter.getExample().toString();
+            return;
+        }
+
+        setParameterExampleValue(codegenParameter);
+    }
+
     /**
      * Return the example value of the property
      *
@@ -2738,7 +2753,7 @@ public CodegenParameter fromParameter(Parameter parameter, Set<String> imports)
 
         // set the parameter excample value
         // should be overridden by lang codegen
-        setParameterExampleValue(codegenParameter);
+        setParameterExampleValue(codegenParameter, parameter);
 
         postProcessParameter(codegenParameter);
         LOGGER.debug("debugging codegenParameter return: " + codegenParameter);
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java
index 104f7ce5d5a0..ab06fa3f2c6a 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java
@@ -214,4 +214,16 @@ public void testGetSchemaTypeWithComposedSchemaWithOneOf() {
 
         Assert.assertNotNull(type);
     }
+
+    @Test
+    public void testExample1() {
+        final OpenAPI openAPI = new OpenAPIParser().readLocation("src/test/resources/3_0/examples.yaml", null, new ParseOptions()).getOpenAPI();
+        final DefaultCodegen codegen = new DefaultCodegen();
+
+        Operation operation = openAPI.getPaths().get("/example1").getGet();
+        CodegenParameter codegenParameter = CodegenModelFactory.newInstance(CodegenModelType.PARAMETER);
+        codegen.setParameterExampleValue(codegenParameter, operation.getParameters().get(0));
+
+        Assert.assertEquals(codegenParameter.example, "example1 value");
+    }
 }
diff --git a/modules/openapi-generator/src/test/resources/3_0/examples.yaml b/modules/openapi-generator/src/test/resources/3_0/examples.yaml
new file mode 100644
index 000000000000..6acca94449e4
--- /dev/null
+++ b/modules/openapi-generator/src/test/resources/3_0/examples.yaml
@@ -0,0 +1,23 @@
+openapi: 3.0.0
+servers:
+  - url: 'http://petstore.swagger.io/v2'
+info:
+  version: 1.0.0
+  title: OpenAPI Petstore
+  license:
+    name: Apache-2.0
+    url: 'http://www.apache.org/licenses/LICENSE-2.0.html'
+paths:
+  /example1:
+    get:
+      operationId: example1Get
+      parameters:
+        - name: parameter
+          in: query
+          example: 'example1 value'
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+