provide mechanism to create an ApiError from an http status code

Author: Carmine DiMascio

README.md

@@ -17,7 +17,7 @@ All 'out of the box' errors are Jackson ready and can be serialized as *JSON*, *
 Gradle
 
 ```groovy
-compile 'io.github.cdimascio:japi-errors:1.1.4'
+compile 'io.github.cdimascio:japi-errors:1.2.0'
 ```
 
 Maven
@@ -26,7 +26,7 @@ Maven
 <dependency>
   <groupId>io.github.cdimascio</groupId>
   <artifactId>japi-errors</artifactId>
-  <version>1.1.4</version>
+  <version>1.2.0</version>
 </dependency>
 ```
 

japi-errors-1.1.4.pom renamed to japi-errors-1.2.0.pom

@@ -10,7 +10,7 @@
 
     <groupId>io.github.cdimascio</groupId>
     <artifactId>japi-errors</artifactId>
-    <version>1.1.3</version>
+    <version>1.2.0</version>
 
     <licenses>
         <license>
@@ -50,10 +50,11 @@
 
 
     <properties>
-        <kotlin.version>1.2.60</kotlin.version>
+        <kotlin.version>1.3.0</kotlin.version>
         <main.class>io.github.cdimascio.japierrors.ApiErrors</main.class>
         <junit.version>4.12</junit.version>
         <jackson.version>2.9.7</jackson.version>
+        <unirest.version>1.4.9</unirest.version>
         <junit.jupiter.version>5.3.1</junit.jupiter.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
@@ -88,6 +89,13 @@
             <scope>test</scope>
         </dependency>
 
+        <dependency>
+            <groupId>com.mashape.unirest</groupId>
+            <artifactId>unirest-java</artifactId>
+            <version>${unirest.version}</version>
+            <scope>test</scope>
+        </dependency>
+
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>
@@ -202,6 +210,10 @@
                 <configuration>
                     <source>8</source>
                     <target>8</target>
+                    <compilerArgs>
+                        <arg>-verbose</arg>
+                        <arg>-Xlint:unchecked</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
         </plugins>

pom.xml

@@ -10,7 +10,7 @@
 
     <groupId>io.github.cdimascio</groupId>
     <artifactId>japi-errors</artifactId>
-    <version>1.1.4</version>
+    <version>1.2.0</version>
 
     <licenses>
         <license>

src/main/java/io/github/cdimascio/japierrors/ApiError.java

@@ -11,6 +11,7 @@ public static <T extends ApiError> void creator(IApiErrorCreator<T> creator) {
     private static <T extends ApiError> IApiErrorCreator<T> getCreator() {
         return error;
     }
+
     /**
      * Create a bad request api error using the specified throwable
      * @param t The exceptioo or throwable
@@ -477,6 +478,32 @@ public static <T extends ApiError> T upgradeRequired(String message) {
     public static <T extends ApiError> T upgradeRequired() {
         return (T) error.create(HttpStatus.UPGRADE_REQUIRED, "upgrade required");
     }
+
+    /**
+     * Creates an upgrade required error with the specified exception or throwable
+     * @param t The exception or throwable
+     * @return The api error
+     */
+    public static <T extends ApiError> T error(int code, Throwable t) {
+        return (T) error.create(HttpStatus.fromCode(code), t);
+    }
+
+    /**
+     * Creates an upgrade required error with the specified message
+     * @param message The message
+     * @return The api error
+     */
+    public static <T extends ApiError> T error(int code, String message) {
+        return (T) error.create(HttpStatus.fromCode(code), message);
+    }
+
+    /**
+     * Creates an upgrade required error
+     * @return The api error
+     */
+    public static <T extends ApiError> T error(int code) {
+        return (T) error.create(HttpStatus.fromCode(code), "error");
+    }
 }
 
 

src/main/java/io/github/cdimascio/japierrors/HttpStatus.java

@@ -45,6 +45,29 @@ public String getDescription() {
         return this.description;
     }
 
+    public static HttpStatus fromCode(int code) {
+        switch(code) {
+            case 400: return BAD_REQUEST;
+            case 409: return CONFLICT;
+            case 403: return FORBIDDEN;
+            case 504: return GATEWAY_TIMEOUT;
+            case 410: return GONE;
+            case 500: return INTERNAL_SERVER_ERROR;
+            case 406: return NOT_ACCEPTABLE;
+            case 404: return NOT_FOUND;
+            case 501: return NOT_IMPLEMENTED;
+            case 412: return PRECONDITION_FAILED;
+            case 428: return PRECONDITION_REQUIRED;
+            case 407: return PROXY_AUTHENTICATION_REQUIRED;
+            case 413: return REQUEST_ENTITY_TOO_LARGE;
+            case 503: return SERVICE_UNAVAILABLE;
+            case 401: return UNAUTHORIZED;
+            case 451: return UNAVAILABLE_FOR_LEGAL_REASONS;
+            case 415: return UNSUPPORTED_MEDIA_TYPE;
+            case 426: return UPGRADE_REQUIRED;
+            default: throw new IllegalArgumentException("unknown status code " +code);
+        }
+    }
     @Override
     public String toString() {
         return "HttpStatus{" +