io.vertx.config

## Class ConfigChange

- java.lang.Object
- - io.vertx.config.ConfigChange

-     public class ConfigChange
      extends Object

  A structure representing a configuration change.
  Author:
    Clement Escoffier

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ConfigChange()` Creates a new instance from `ConfigChange` using empty JSON Object for both the old and new configuration.
    `ConfigChange(ConfigChange other)` Creates a new instance of `ConfigChange` copying the values stored in the given object.
    `ConfigChange(JsonObject json)` Creates a new `ConfigChange` instance from the given JSON object.
    `ConfigChange(JsonObject prevConf, JsonObject newConf)` Creates a new `ConfigChange` instance.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `JsonObject` | `getNewConfiguration()`
    `JsonObject` | `getPreviousConfiguration()`
    `ConfigChange` | `setNewConfiguration(JsonObject conf)` Sets the new configuration.
    `ConfigChange` | `setPreviousConfiguration(JsonObject conf)` Sets the previous configuration.
    `JsonObject` | `toJson()`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### ConfigChange

          public ConfigChange(JsonObject prevConf,
                              JsonObject newConf)

      Creates a new `ConfigChange` instance.
      Parameters:
        `prevConf` - the previous configuration, may be `null`. In this case, an empty JSON object is used.
        `newConf` - the new configuration, may be `null`. In this case, an empty JSON object is used.

    - #### ConfigChange

          public ConfigChange()

      Creates a new instance from `ConfigChange` using empty JSON Object for both the old and new configuration.

    - #### ConfigChange

          public ConfigChange(ConfigChange other)

      Creates a new instance of `ConfigChange` copying the values stored in the given object.
      Parameters:
        `other` - the instance to copy

    - #### ConfigChange

          public ConfigChange(JsonObject json)

      Creates a new `ConfigChange` instance from the given JSON object.
      Parameters:
        `json` - the json object, must not be `null`

  - ### Method Detail

    - #### getPreviousConfiguration

          public JsonObject getPreviousConfiguration()

      Returns:
        the previous configuration, never `null`, but potentially empty

    - #### setPreviousConfiguration

          public ConfigChange setPreviousConfiguration(JsonObject conf)

      Sets the previous configuration.
      Parameters:
        `conf` - the configuration, may be `null`. In this case an empty JSON object is used.
      Returns:
        the current instance of `ConfigChange`

    - #### getNewConfiguration

          public JsonObject getNewConfiguration()

      Returns:
        the new configuration, never `null`, but potentially empty.

    - #### setNewConfiguration

          public ConfigChange setNewConfiguration(JsonObject conf)

      Sets the new configuration.
      Parameters:
        `conf` - the new configuration, may be `null`. In this case, an empty JSON object is used.
      Returns:
        the current instance of `ConfigChange`

    - #### toJson

          public JsonObject toJson()

      Returns:
        the JSON representation of the current `ConfigChange` instance.

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