diff --git a/demo/petstore.json b/demo/petstore.json
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--- /dev/null
+++ b/demo/petstore.json
@@ -0,0 +1,819 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "description": "This is a sample server Petstore server.  You can find out more about Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net, #swagger](http://swagger.io/irc/).  For this sample, you can use the api key `special-key` to test the authorization filters.",
+    "version": "1.0.0",
+    "title": "Swagger Petstore",
+    "termsOfService": "http://swagger.io/terms/",
+    "contact": {
+      "email": "apiteam@swagger.io"
+    },
+    "license": {
+      "name": "Apache 2.0",
+      "url": "http://www.apache.org/licenses/LICENSE-2.0.html"
+    }
+  },
+  "host": "petstore.swagger.io",
+  "basePath": "/v2",
+  "tags": [{
+    "name": "pet",
+    "description": "Everything about your Pets",
+    "externalDocs": {
+      "description": "Find out more",
+      "url": "http://swagger.io"
+    }
+  }, {
+    "name": "store",
+    "description": "Access to Petstore orders"
+  }, {
+    "name": "user",
+    "description": "Operations about user",
+    "externalDocs": {
+      "description": "Find out more about our store",
+      "url": "http://swagger.io"
+    }
+  }],
+  "schemes": ["http"],
+  "paths": {
+    "/pet": {
+      "post": {
+        "tags": ["pet"],
+        "summary": "Add a new pet to the store",
+        "description": "",
+        "operationId": "addPet",
+        "consumes": ["application/json", "application/xml"],
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "in": "body",
+          "name": "body",
+          "description": "Pet object that needs to be added to the store",
+          "required": true,
+          "schema": {
+            "$ref": "#/definitions/Pet"
+          }
+        }],
+        "responses": {
+          "405": {
+            "description": "Invalid input"
+          }
+        },
+        "security": [{
+          "petstore_auth": ["write:pets", "read:pets"]
+        }]
+      },
+      "put": {
+        "tags": ["pet"],
+        "summary": "Update an existing pet",
+        "description": "",
+        "operationId": "updatePet",
+        "consumes": ["application/json", "application/xml"],
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "in": "body",
+          "name": "body",
+          "description": "Pet object that needs to be added to the store",
+          "required": true,
+          "schema": {
+            "$ref": "#/definitions/Pet"
+          }
+        }],
+        "responses": {
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Pet not found"
+          },
+          "405": {
+            "description": "Validation exception"
+          }
+        },
+        "security": [{
+          "petstore_auth": ["write:pets", "read:pets"]
+        }]
+      }
+    },
+    "/pet/findByStatus": {
+      "get": {
+        "tags": ["pet"],
+        "summary": "Finds Pets by status",
+        "description": "Multiple status values can be provided with comma seperated strings",
+        "operationId": "findPetsByStatus",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "status",
+          "in": "query",
+          "description": "Status values that need to be considered for filter",
+          "required": true,
+          "type": "array",
+          "items": {
+            "type": "string",
+            "enum": ["available", "pending", "sold"],
+            "default": "available"
+          },
+          "collectionFormat": "csv"
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Pet"
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid status value"
+          }
+        },
+        "security": [{
+          "petstore_auth": ["write:pets", "read:pets"]
+        }]
+      }
+    },
+    "/pet/findByTags": {
+      "get": {
+        "tags": ["pet"],
+        "summary": "Finds Pets by tags",
+        "description": "Muliple tags can be provided with comma seperated strings. Use tag1, tag2, tag3 for testing.",
+        "operationId": "findPetsByTags",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "tags",
+          "in": "query",
+          "description": "Tags to filter by",
+          "required": true,
+          "type": "array",
+          "items": {
+            "type": "string"
+          },
+          "collectionFormat": "csv"
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Pet"
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid tag value"
+          }
+        },
+        "security": [{
+          "petstore_auth": ["write:pets", "read:pets"]
+        }]
+      }
+    },
+    "/pet/{petId}": {
+      "get": {
+        "tags": ["pet"],
+        "summary": "Find pet by ID",
+        "description": "Returns a single pet",
+        "operationId": "getPetById",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "petId",
+          "in": "path",
+          "description": "ID of pet to return",
+          "required": true,
+          "type": "integer",
+          "format": "int64"
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/Pet"
+            }
+          },
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Pet not found"
+          }
+        },
+        "security": [{
+          "api_key": []
+        }]
+      },
+      "post": {
+        "tags": ["pet"],
+        "summary": "Updates a pet in the store with form data",
+        "description": "",
+        "operationId": "updatePetWithForm",
+        "consumes": ["application/x-www-form-urlencoded"],
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "petId",
+          "in": "path",
+          "description": "ID of pet that needs to be updated",
+          "required": true,
+          "type": "integer",
+          "format": "int64"
+        }, {
+          "name": "name",
+          "in": "formData",
+          "description": "Updated name of the pet",
+          "required": false,
+          "type": "string"
+        }, {
+          "name": "status",
+          "in": "formData",
+          "description": "Updated status of the pet",
+          "required": false,
+          "type": "string"
+        }],
+        "responses": {
+          "405": {
+            "description": "Invalid input"
+          }
+        },
+        "security": [{
+          "petstore_auth": ["write:pets", "read:pets"]
+        }]
+      },
+      "delete": {
+        "tags": ["pet"],
+        "summary": "Deletes a pet",
+        "description": "",
+        "operationId": "deletePet",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "api_key",
+          "in": "header",
+          "required": false,
+          "type": "string"
+        }, {
+          "name": "petId",
+          "in": "path",
+          "description": "Pet id to delete",
+          "required": true,
+          "type": "integer",
+          "format": "int64"
+        }],
+        "responses": {
+          "400": {
+            "description": "Invalid pet value"
+          }
+        },
+        "security": [{
+          "petstore_auth": ["write:pets", "read:pets"]
+        }]
+      }
+    },
+    "/pet/{petId}/uploadImage": {
+      "post": {
+        "tags": ["pet"],
+        "summary": "uploads an image",
+        "description": "",
+        "operationId": "uploadFile",
+        "consumes": ["multipart/form-data"],
+        "produces": ["application/json"],
+        "parameters": [{
+          "name": "petId",
+          "in": "path",
+          "description": "ID of pet to update",
+          "required": true,
+          "type": "integer",
+          "format": "int64"
+        }, {
+          "name": "additionalMetadata",
+          "in": "formData",
+          "description": "Additional data to pass to server",
+          "required": false,
+          "type": "string"
+        }, {
+          "name": "file",
+          "in": "formData",
+          "description": "file to upload",
+          "required": false,
+          "type": "file"
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/ApiResponse"
+            }
+          }
+        },
+        "security": [{
+          "petstore_auth": ["write:pets", "read:pets"]
+        }]
+      }
+    },
+    "/store/inventory": {
+      "get": {
+        "tags": ["store"],
+        "summary": "Returns pet inventories by status",
+        "description": "Returns a map of status codes to quantities",
+        "operationId": "getInventory",
+        "produces": ["application/json"],
+        "parameters": [],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "type": "object",
+              "additionalProperties": {
+                "type": "integer",
+                "format": "int32"
+              }
+            }
+          }
+        },
+        "security": [{
+          "api_key": []
+        }]
+      }
+    },
+    "/store/order": {
+      "post": {
+        "tags": ["store"],
+        "summary": "Place an order for a pet",
+        "description": "",
+        "operationId": "placeOrder",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "in": "body",
+          "name": "body",
+          "description": "order placed for purchasing the pet",
+          "required": true,
+          "schema": {
+            "$ref": "#/definitions/Order"
+          }
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/Order"
+            }
+          },
+          "400": {
+            "description": "Invalid Order"
+          }
+        }
+      }
+    },
+    "/store/order/{orderId}": {
+      "get": {
+        "tags": ["store"],
+        "summary": "Find purchase order by ID",
+        "description": "For valid response try integer IDs with value <= 5 or > 10. Other values will generated exceptions",
+        "operationId": "getOrderById",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "orderId",
+          "in": "path",
+          "description": "ID of pet that needs to be fetched",
+          "required": true,
+          "type": "integer",
+          "maximum": 5.0,
+          "minimum": 1.0,
+          "format": "int64"
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/Order"
+            }
+          },
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Order not found"
+          }
+        }
+      },
+      "delete": {
+        "tags": ["store"],
+        "summary": "Delete purchase order by ID",
+        "description": "For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors",
+        "operationId": "deleteOrder",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "orderId",
+          "in": "path",
+          "description": "ID of the order that needs to be deleted",
+          "required": true,
+          "type": "string",
+          "minimum": 1.0
+        }],
+        "responses": {
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Order not found"
+          }
+        }
+      }
+    },
+    "/user": {
+      "post": {
+        "tags": ["user"],
+        "summary": "Create user",
+        "description": "This can only be done by the logged in user.",
+        "operationId": "createUser",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "in": "body",
+          "name": "body",
+          "description": "Created user object",
+          "required": true,
+          "schema": {
+            "$ref": "#/definitions/User"
+          }
+        }],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    },
+    "/user/createWithArray": {
+      "post": {
+        "tags": ["user"],
+        "summary": "Creates list of users with given input array",
+        "description": "",
+        "operationId": "createUsersWithArrayInput",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "in": "body",
+          "name": "body",
+          "description": "List of user object",
+          "required": true,
+          "schema": {
+            "type": "array",
+            "items": {
+              "$ref": "#/definitions/User"
+            }
+          }
+        }],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    },
+    "/user/createWithList": {
+      "post": {
+        "tags": ["user"],
+        "summary": "Creates list of users with given input array",
+        "description": "",
+        "operationId": "createUsersWithListInput",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "in": "body",
+          "name": "body",
+          "description": "List of user object",
+          "required": true,
+          "schema": {
+            "type": "array",
+            "items": {
+              "$ref": "#/definitions/User"
+            }
+          }
+        }],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    },
+    "/user/login": {
+      "get": {
+        "tags": ["user"],
+        "summary": "Logs user into the system",
+        "description": "",
+        "operationId": "loginUser",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "username",
+          "in": "query",
+          "description": "The user name for login",
+          "required": true,
+          "type": "string"
+        }, {
+          "name": "password",
+          "in": "query",
+          "description": "The password for login in clear text",
+          "required": true,
+          "type": "string"
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "type": "string"
+            },
+            "headers": {
+              "X-Rate-Limit": {
+                "type": "integer",
+                "format": "int32",
+                "description": "calls per hour allowed by the user"
+              },
+              "X-Expires-After": {
+                "type": "string",
+                "format": "date-time",
+                "description": "date in UTC when toekn expires"
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid username/password supplied"
+          }
+        }
+      }
+    },
+    "/user/logout": {
+      "get": {
+        "tags": ["user"],
+        "summary": "Logs out current logged in user session",
+        "description": "",
+        "operationId": "logoutUser",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    },
+    "/user/{username}": {
+      "get": {
+        "tags": ["user"],
+        "summary": "Get user by user name",
+        "description": "",
+        "operationId": "getUserByName",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "username",
+          "in": "path",
+          "description": "The name that needs to be fetched. Use user1 for testing. ",
+          "required": true,
+          "type": "string"
+        }],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/User"
+            }
+          },
+          "400": {
+            "description": "Invalid username supplied"
+          },
+          "404": {
+            "description": "User not found"
+          }
+        }
+      },
+      "put": {
+        "tags": ["user"],
+        "summary": "Updated user",
+        "description": "This can only be done by the logged in user.",
+        "operationId": "updateUser",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "username",
+          "in": "path",
+          "description": "name that need to be deleted",
+          "required": true,
+          "type": "string"
+        }, {
+          "in": "body",
+          "name": "body",
+          "description": "Updated user object",
+          "required": true,
+          "schema": {
+            "$ref": "#/definitions/User"
+          }
+        }],
+        "responses": {
+          "400": {
+            "description": "Invalid user supplied"
+          },
+          "404": {
+            "description": "User not found"
+          }
+        }
+      },
+      "delete": {
+        "tags": ["user"],
+        "summary": "Delete user",
+        "description": "This can only be done by the logged in user.",
+        "operationId": "deleteUser",
+        "produces": ["application/xml", "application/json"],
+        "parameters": [{
+          "name": "username",
+          "in": "path",
+          "description": "The name that needs to be deleted",
+          "required": true,
+          "type": "string"
+        }],
+        "responses": {
+          "400": {
+            "description": "Invalid username supplied"
+          },
+          "404": {
+            "description": "User not found"
+          }
+        }
+      }
+    }
+  },
+  "securityDefinitions": {
+    "petstore_auth": {
+      "type": "oauth2",
+      "authorizationUrl": "http://petstore.swagger.io/api/oauth/dialog",
+      "flow": "implicit",
+      "scopes": {
+        "write:pets": "modify pets in your account",
+        "read:pets": "read your pets"
+      }
+    },
+    "api_key": {
+      "type": "apiKey",
+      "name": "api_key",
+      "in": "header"
+    }
+  },
+  "definitions": {
+    "Order": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "petId": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "quantity": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "shipDate": {
+          "type": "string",
+          "format": "date-time"
+        },
+        "status": {
+          "type": "string",
+          "description": "Order Status",
+          "enum": ["placed", "approved", "delivered"]
+        },
+        "complete": {
+          "type": "boolean",
+          "default": false
+        }
+      },
+      "xml": {
+        "name": "Order"
+      }
+    },
+    "User": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "username": {
+          "type": "string"
+        },
+        "firstName": {
+          "type": "string"
+        },
+        "lastName": {
+          "type": "string"
+        },
+        "email": {
+          "type": "string"
+        },
+        "password": {
+          "type": "string"
+        },
+        "phone": {
+          "type": "string"
+        },
+        "userStatus": {
+          "type": "integer",
+          "format": "int32",
+          "description": "User Status"
+        }
+      },
+      "xml": {
+        "name": "User"
+      }
+    },
+    "Category": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "xml": {
+        "name": "Category"
+      }
+    },
+    "Tag": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "xml": {
+        "name": "Tag"
+      }
+    },
+    "Pet": {
+      "type": "object",
+      "required": ["name", "photoUrls"],
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "category": {
+          "$ref": "#/definitions/Category"
+        },
+        "name": {
+          "type": "string",
+          "example": "doggie"
+        },
+        "photoUrls": {
+          "type": "array",
+          "xml": {
+            "name": "photoUrl",
+            "wrapped": true
+          },
+          "items": {
+            "type": "string"
+          }
+        },
+        "tags": {
+          "type": "array",
+          "xml": {
+            "name": "tag",
+            "wrapped": true
+          },
+          "items": {
+            "$ref": "#/definitions/Tag"
+          }
+        },
+        "status": {
+          "type": "string",
+          "description": "pet status in the store",
+          "enum": ["available", "pending", "sold"]
+        }
+      },
+      "xml": {
+        "name": "Pet"
+      }
+    },
+    "ApiResponse": {
+      "type": "object",
+      "properties": {
+        "code": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "type": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        }
+      }
+    }
+  },
+  "externalDocs": {
+    "description": "Find out more about Swagger",
+    "url": "http://swagger.io"
+  }
+}