Package com.google.gerrit.index.query

Class LazyResultSet<T>

java.lang.Object
com.google.gerrit.index.query.LazyResultSet<T>
All Implemented Interfaces:
ResultSet<T>, Iterable<T>
public class LazyResultSet<T> extends Object implements ResultSet<T>
Result set that allows for asynchronous execution of the actual query. Callers should dispatch the query and call the constructor of this class with a supplier that fetches the result and blocks on it if necessary.

If the execution is synchronous or the results are known a priori, consider using ListResultSet.

  • Constructor Details

    • LazyResultSet

      public LazyResultSet(Supplier<com.google.common.collect.ImmutableList<T>> r)

  • Method Details

    • iterator

      public Iterator<T> iterator()
      Description copied from interface: ResultSet
      Obtain an iterator to loop through the results.

      The iterator can be obtained only once. When the iterator completes ( hasNext() returns false) ResultSet.close() will be automatically called.

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

    • toList

      public com.google.common.collect.ImmutableList<T> toList()
      Description copied from interface: ResultSet
      Materialize all results as a single list.

      Prior to returning ResultSet.close() is invoked. This method must not be combined with ResultSet.iterator() on the same instance.

      Specified by:
      toList in interface ResultSet<T>
      Returns:
      immutable list of the complete results.

    • close

      public void close()
      Description copied from interface: ResultSet
      Close the result, discarding any further results.

      This method may be invoked more than once. Its main use is to stop obtaining results before the iterator has finished.

      Specified by:
      close in interface ResultSet<T>

    • searchAfter

      public Object searchAfter()
      Specified by:
      searchAfter in interface ResultSet<T>