ResponseContext.Key (druid-processing 28.0.0 API)

All Known Implementing Classes:

ResponseContext.AbstractKey, ResponseContext.BooleanKey, ResponseContext.CounterKey, ResponseContext.LongKey, ResponseContext.StringKey

Enclosing class:

ResponseContext
```
public static interface ResponseContext.Key
```
The base interface of a response context key. Should be implemented by every context key.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`canDrop()`	Returns true if this key can be removed to reduce header size when the header would otherwise be too large.
`String`	`getName()`
`boolean`	`includeInHeader()`	Whether to return the key, value pair in the response header.
`Object`	`mergeValues(Object oldValue, Object newValue)`	Merges two values of type T.
`Object`	`readValue(com.fasterxml.jackson.core.JsonParser jp)`	Reads a value of this key from a JSON stream.

- Method Detail
  - getName
```
String getName()
```
  - includeInHeader
```
boolean includeInHeader()
```
    Whether to return the key, value pair in the response header. If false, the value is for internal use only.
  - readValue
```
Object readValue(com.fasterxml.jackson.core.JsonParser jp)
```
    Reads a value of this key from a JSON stream. Used by ResponseContextDeserializer.
  - mergeValues
```
Object mergeValues(Object oldValue,
                   Object newValue)
```
    Merges two values of type T.
    This method may modify "oldValue" but must not modify "newValue".
  - canDrop
```
boolean canDrop()
```
    Returns true if this key can be removed to reduce header size when the header would otherwise be too large.