value api: move Value to value package

- code cleanup

Author: jknack

jooby/src/main/java/io/jooby/Body.java

@@ -10,6 +10,7 @@
 import java.nio.channels.ReadableByteChannel;
 import java.nio.charset.Charset;
 import java.nio.file.Path;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
 
@@ -19,6 +20,8 @@
 import io.jooby.internal.ByteArrayBody;
 import io.jooby.internal.FileBody;
 import io.jooby.internal.InputStreamBody;
+import io.jooby.internal.MissingValue;
+import io.jooby.value.Value;
 
 /**
  * HTTP body value. Allows to access HTTP body as string, byte[], stream, etc..
@@ -45,6 +48,26 @@ public interface Body extends Value {
     return new String(bytes, charset);
   }
 
+  @Override
+  default int size() {
+    return 1;
+  }
+
+  @Override
+  default Value get(int index) {
+    return get(Integer.toString(index));
+  }
+
+  @Override
+  default Value get(@NonNull String name) {
+    return new MissingValue(name);
+  }
+
+  @Override
+  default Iterator<Value> iterator() {
+    return List.of((Value) this).iterator();
+  }
+
   /**
    * HTTP body as byte array.
    *

jooby/src/main/java/io/jooby/Context.java

@@ -32,11 +32,12 @@
 import edu.umd.cs.findbugs.annotations.Nullable;
 import io.jooby.buffer.DataBuffer;
 import io.jooby.buffer.DataBufferFactory;
-import io.jooby.exception.TypeMismatchException;
 import io.jooby.internal.LocaleUtils;
 import io.jooby.internal.ParamLookupImpl;
 import io.jooby.internal.ReadOnlyContext;
 import io.jooby.internal.WebSocketSender;
+import io.jooby.value.Value;
+import io.jooby.value.ValueFactory;
 
 /**
  * HTTP context allows you to interact with the HTTP Request and manipulate the HTTP Response.
@@ -135,16 +136,16 @@ private static Selector single() {
    * @param value Attribute value.
    * @return This router.
    */
-  @NonNull Context setAttribute(@NonNull String key, Object value);
+  Context setAttribute(@NonNull String key, Object value);
 
   /**
    * Get the HTTP router (usually this represents an instance of {@link Jooby}.
    *
    * @return HTTP router (usually this represents an instance of {@link Jooby}.
    */
-  @NonNull Router getRouter();
+  Router getRouter();
 
-  @NonNull DataBufferFactory getBufferFactory();
+  DataBufferFactory getBufferFactory();
 
   /**
    * Forward executing to another route. We use the given path to find a matching route.
@@ -154,33 +155,7 @@ private static Selector single() {
    * @param path Path to forward the request.
    * @return Forward result.
    */
-  @NonNull Object forward(@NonNull String path);
-
-  /**
-   * Converts a value (single or hash) into the given type.
-   *
-   * @param value Value to convert.
-   * @param type Expected type.
-   * @param <T> Generic type.
-   * @return Converted value.
-   */
-  default @NonNull <T> T convert(@NonNull Value value, @NonNull Class<T> type) {
-    T result = convertOrNull(value, type);
-    if (result == null) {
-      throw new TypeMismatchException(value.name(), type);
-    }
-    return result;
-  }
-
-  /**
-   * Converts a value (single or hash) into the given type.
-   *
-   * @param value Value to convert.
-   * @param type Expected type.
-   * @param <T> Generic type.
-   * @return Converted value or <code>null</code>.
-   */
-  @Nullable <T> T convertOrNull(@NonNull Value value, @NonNull Class<T> type);
+  Object forward(@NonNull String path);
 
   /*
    * **********************************************************************************************
@@ -193,7 +168,7 @@ private static Selector single() {
    *
    * @return Flash map.
    */
-  @NonNull FlashMap flash();
+  FlashMap flash();
 
   /**
    * Flash map or null when no flash cookie exists.
@@ -202,13 +177,15 @@ private static Selector single() {
    */
   @Nullable FlashMap flashOrNull();
 
+  ValueFactory getValueFactory();
+
   /**
    * Get a flash attribute.
    *
    * @param name Attribute's name.
    * @return Flash attribute.
    */
-  @NonNull Value flash(@NonNull String name);
+  Value flash(@NonNull String name);
 
   /**
    * Find a session or creates a new session.