Encoder (Feign Core 10.1.0 API)

All Known Implementing Classes:

Encoder.Default
```
public interface Encoder
```
Encodes an object into an HTTP request body. Like javax.websocket.Encoder. Encoder is used when a method parameter has no @Param annotation. For example:
```
 @POST
 @Path("/")
 void create(User user);
 
```
Example implementation:
```
 public class GsonEncoder implements Encoder {
   private final Gson gson;

   public GsonEncoder(Gson gson) {
     this.gson = gson;
   }

   @Override
   public void encode(Object object, Type bodyType, RequestTemplate template) {
     template.body(gson.toJson(object, bodyType));
   }
 }
 
```
Form encoding

If any parameters are found in MethodMetadata.formParams(), they will be collected and passed to the Encoder as a map.
Ex. The following is a form. Notice the parameters aren't consumed in the request line. A map including "username" and "password" keys will passed to the encoder, and the body type will be MAP_STRING_WILDCARD.
```
 @RequestLine("POST /")
 Session login(@Param("username") String username, @Param("password") String password);
 
```

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class Encoder.Default
Default implementation of Encoder.

Field Summary

Fields
Modifier and Type Field Description

static java.lang.reflect.Type MAP_STRING_WILDCARD
Type literal for Map<String, ?>, indicating the object to encode is a form.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`encode(java.lang.Object object, java.lang.reflect.Type bodyType, RequestTemplate template)`	Converts objects to an appropriate representation in the template.

- Field Detail
  - MAP_STRING_WILDCARD
```
static final java.lang.reflect.Type MAP_STRING_WILDCARD
```
    Type literal for Map<String, ?>, indicating the object to encode is a form.
- Method Detail
  - encode
```
void encode(java.lang.Object object,
            java.lang.reflect.Type bodyType,
            RequestTemplate template)
     throws EncodeException
```
    Converts objects to an appropriate representation in the template.
    
    Parameters:
    
    object - what to encode as the request body.
    
    bodyType - the type the object should be encoded as. MAP_STRING_WILDCARD indicates form encoding.
    
    template - the request template to populate.
    
    Throws:
    
    EncodeException - when encoding failed due to a checked exception.