Execute-Around-Method (factoring out Allocate-Use-Release).


public class ExecuteAroundMethod {
  private ListSelectionModel sel;

  private interface Adjustment {
    public void
    use(ListSelectionModel sel);
  }

  private void
  executeAround(
    Adjustment adjustment) {
    // Consider the 'lock' on
    // notifications as a
    // 'resource'
    sel. setValueIsAdjusting(
      true);

    try {
      adjustment.use(sel);
    }
    finally {
      sel.setValueIsAdjusting(
        false);
    }
  }

  public void removeOdd() {
    executeAround(
      new Adjustment() {
      public void
      use(ListSelectionModel s) {

        for (int i = entries;
            --i != 0;)
          if (0 != i % 2)
            s.removeIndexInterval(
              i, i);
      }
    });
  }
}

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