How to use

move

method

in

org.jgroups.util.Table

/** Moves rows down the matrix, by removing purged rows. If resizing to accommodate seqno is still needed, computes
 * a new size. Then either moves existing rows down, or copies them into a new array (if resizing took place).
 * The lock must be held by the caller of resize(). */
@SuppressWarnings("unchecked")
@GuardedBy("lock")
protected void resize(long seqno) {
  int num_rows_to_purge=computeRow(low);
  int row_index=computeRow(seqno) - num_rows_to_purge;
  if(row_index < 0)
    return;
  int new_size=Math.max(row_index +1, matrix.length);
  if(new_size > matrix.length) {
    T[][] new_matrix=(T[][])new Object[new_size][];
    System.arraycopy(matrix, num_rows_to_purge, new_matrix, 0, matrix.length - num_rows_to_purge);
    matrix=new_matrix;
    num_resizes++;
  }
  else if(num_rows_to_purge > 0) {
    move(num_rows_to_purge);
  }
  offset+=(num_rows_to_purge * elements_per_row);
}

/** Moves rows down the matrix, by removing purged rows. If resizing to accommodate seqno is still needed, computes
 * a new size. Then either moves existing rows down, or copies them into a new array (if resizing took place).
 * The lock must be held by the caller of resize(). */
@SuppressWarnings("unchecked")
@GuardedBy("lock")
protected void resize(long seqno) {
  int num_rows_to_purge=computeRow(low);
  int row_index=computeRow(seqno) - num_rows_to_purge;
  if(row_index < 0)
    return;
  int new_size=Math.max(row_index +1, matrix.length);
  if(new_size > matrix.length) {
    T[][] new_matrix=(T[][])new Object[new_size][];
    System.arraycopy(matrix, num_rows_to_purge, new_matrix, 0, matrix.length - num_rows_to_purge);
    matrix=new_matrix;
    num_resizes++;
  }
  else if(num_rows_to_purge > 0) {
    move(num_rows_to_purge);
  }
  offset+=(num_rows_to_purge * elements_per_row);
}