Class BlockListImpl

src/java/org/apache/poi/poifs/storage/BlockListImpl.java:27–158

A simple implementation of BlockList @author Marc Johnson (mjohnson at apache dot org

 * @author Marc Johnson (mjohnson at apache dot org
 */
abstract class BlockListImpl implements BlockList {
    private ListManagedBlock[]         _blocks;
    private BlockAllocationTableReader _bat;

    protected BlockListImpl()
    {
        _blocks = new ListManagedBlock[ 0 ];
        _bat    = null;
    }

    /**
     * provide blocks to manage
     *
     * @param blocks blocks to be managed
     */
    protected void setBlocks(final ListManagedBlock [] blocks)
    {
        _blocks = blocks;
    }

    /**
     * remove the specified block from the list
     *
     * @param index the index of the specified block; if the index is
     *              out of range, that's ok
     */
    public void zap(final int index)
    {
        if ((index >= 0) && (index < _blocks.length))
        {
            _blocks[ index ] = null;
        }
    }

    /**
     * Unit testing method. Gets, without sanity checks or
     *  removing.
     */
    protected ListManagedBlock get(final int index) {
        return _blocks[index];
    }

    /**
     * remove and return the specified block from the list
     *
     * @param index the index of the specified block
     *
     * @return the specified block
     *
     * @exception IOException if the index is out of range or has
     *            already been removed
     */
    public ListManagedBlock remove(final int index)
        throws IOException
    {
        ListManagedBlock result = null;

        try