org.apache.cayenne.util

## Class ListResponse

- java.lang.Object
- - org.apache.cayenne.util.ListResponse

- All Implemented Interfaces:
    Serializable, QueryResponse
  Direct Known Subclasses:
    IncrementalListResponse

      public class ListResponse
      extends Object
      implements QueryResponse, Serializable

  A QueryResponse optimized to hold a single object or data row list.
  Since:
    1.2
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected int` | `currentIndex`
    `protected List` | `objectList`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ListResponse()` Creates an empty response.
    `ListResponse(List objectList)`
    `ListResponse(Object object)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `List` | `currentList()` Returns a List under the current iterator position.
    `int[]` | `currentUpdateCount()` Returns an update count under the current iterator position.
    `List` | `firstList()` A utility method for quickly retrieving the first list in the response.
    `int[]` | `firstUpdateCount()` A utility method for quickly retrieving the first update count from the response.
    `boolean` | `isList()` Returns whether current iteration result is a list or an update count.
    `boolean` | `next()` Rewinds response iterator to the next result, returning true if it is available.
    `void` | `reset()` Restarts response iterator.
    `int` | `size()` Returns a number of results in the response.

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

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

- - ### Field Detail

    - #### objectList

          protected List objectList

    - #### currentIndex

          protected transient int currentIndex

  - ### Constructor Detail

    - #### ListResponse

          public ListResponse()

      Creates an empty response.

    - #### ListResponse

          public ListResponse(Object object)

    - #### ListResponse

          public ListResponse(List objectList)

  - ### Method Detail

    - #### size

          public int size()

      Description copied from interface: `QueryResponse`
      Returns a number of results in the response.
      Specified by:
        `size` in interface `QueryResponse`

    - #### isList

          public boolean isList()

      Description copied from interface: `QueryResponse`
      Returns whether current iteration result is a list or an update count.
      Specified by:
        `isList` in interface `QueryResponse`

    - #### currentList

          public List currentList()

      Description copied from interface: `QueryResponse`
      Returns a List under the current iterator position. Use `QueryResponse.isList()` to check the result type before calling this method.
      Specified by:
        `currentList` in interface `QueryResponse`

    - #### currentUpdateCount

          public int[] currentUpdateCount()

      Description copied from interface: `QueryResponse`
      Returns an update count under the current iterator position. Returned value is an int[] to accommodate batch queries. For a regular update result, the value will be an int[1]. Use `QueryResponse.isList()` to check the result type before calling this method.
      Specified by:
        `currentUpdateCount` in interface `QueryResponse`

    - #### next

          public boolean next()

      Description copied from interface: `QueryResponse`
      Rewinds response iterator to the next result, returning true if it is available.
      Specified by:
        `next` in interface `QueryResponse`

    - #### reset

          public void reset()

      Description copied from interface: `QueryResponse`
      Restarts response iterator.
      Specified by:
        `reset` in interface `QueryResponse`

    - #### firstList

          public List firstList()

      Description copied from interface: `QueryResponse`
      A utility method for quickly retrieving the first list in the response. Returns null if the query has no lists. Note that this method resets current iterator to an undefined state.
      Specified by:
        `firstList` in interface `QueryResponse`

    - #### firstUpdateCount

          public int[] firstUpdateCount()

      Description copied from interface: `QueryResponse`
      A utility method for quickly retrieving the first update count from the response. Note that this method resets current iterator to an undefined state.
      Specified by:
        `firstUpdateCount` in interface `QueryResponse`

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