org.apache.cayenne.access.jdbc

## Class ConnectionAwareResultIterator<T>

- java.lang.Object
- - org.apache.cayenne.access.jdbc.ConnectionAwareResultIterator<T>

- All Implemented Interfaces:
    AutoCloseable, Iterable<T>, ResultIterator<T>

      public class ConnectionAwareResultIterator<T>
      extends Object
      implements ResultIterator<T>

  A `ResultIterator` wrapper that handles closing a connection. Also internally counts processed rows, mostly for the benefit of subclasses. Subclasses are used in iterators that are returned to the end users and are not implicitly managed by Cayenne.
  Since:
    4.0

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected int` | `rowCounter`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ConnectionAwareResultIterator(ResultIterator<T> delegate, Connection connection)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `List<T>` | `allRows()` Returns all yet unread rows from ResultSet without closing it.
    `void` | `close()` Closes ResultIterator and associated ResultSet.
    `protected void` | `doClose()`
    `boolean` | `hasNextRow()` Returns true if there is at least one more record that can be read from the iterator.
    `Iterator<T>` | `iterator()`
    `T` | `nextRow()` Returns the next result row that is, depending on the query, may be a scalar value, a DataRow, or an Object[] array containing a mix of scalars and DataRows.
    `void` | `skipRow()` Goes past current row.

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

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

    - ### Methods inherited from interface java.lang.Iterable

      `forEach, spliterator`

- - ### Field Detail

    - #### rowCounter

          protected int rowCounter

  - ### Constructor Detail

    - #### ConnectionAwareResultIterator

          public ConnectionAwareResultIterator(ResultIterator<T> delegate,
                                               Connection connection)

  - ### Method Detail

    - #### close

          public void close()

      Description copied from interface: `ResultIterator`
      Closes ResultIterator and associated ResultSet. This method must be called explicitly when the user is finished processing the records. Otherwise unused database resources will not be released properly.
      Specified by:
        `close` in interface `AutoCloseable`
      Specified by:
        `close` in interface `ResultIterator<T>`

    - #### doClose

          protected void doClose()

    - #### allRows

          public List<T> allRows()

      Description copied from interface: `ResultIterator`
      Returns all yet unread rows from ResultSet without closing it.
      Specified by:
        `allRows` in interface `ResultIterator<T>`

    - #### hasNextRow

          public boolean hasNextRow()

      Description copied from interface: `ResultIterator`
      Returns true if there is at least one more record that can be read from the iterator.
      Specified by:
        `hasNextRow` in interface `ResultIterator<T>`

    - #### nextRow

          public T nextRow()

      Description copied from interface: `ResultIterator`
      Returns the next result row that is, depending on the query, may be a scalar value, a DataRow, or an Object[] array containing a mix of scalars and DataRows.
      Specified by:
        `nextRow` in interface `ResultIterator<T>`

    - #### iterator

          public Iterator<T> iterator()

      Specified by:
        `iterator` in interface `Iterable<T>`

    - #### skipRow

          public void skipRow()

      Description copied from interface: `ResultIterator`
      Goes past current row. If the row is not needed, this may save some time on data conversion.
      Specified by:
        `skipRow` in interface `ResultIterator<T>`

Copyright © 2001–2018 Apache Cayenne. All rights reserved.