private long store()

in mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java [2805:2868]
38 lines of code
8 McCabe index (conditional complexity)

    private long store( long position, int value, PageIO... pageIos )
    {
        // Compute the page in which we will store the data given the
        // current position
        int pageNb = computePageNb( position );

        // Compute the position in the current page
        int pagePos = ( int ) ( position + ( pageNb + 1 ) * LONG_SIZE + INT_SIZE ) - pageNb * pageSize;

        // Get back the buffer in this page
        ByteBuffer pageData = pageIos[pageNb].getData();

        // Compute the remaining size in the page
        int remaining = pageData.capacity() - pagePos;

        if ( remaining < INT_SIZE )
        {
            // We have to copy the serialized length on two pages

            switch ( remaining )
            {
                case 3:
                    pageData.put( pagePos + 2, ( byte ) ( value >>> 8 ) );
                    // Fallthrough !!!

                case 2:
                    pageData.put( pagePos + 1, ( byte ) ( value >>> 16 ) );
                    // Fallthrough !!!

                case 1:
                    pageData.put( pagePos, ( byte ) ( value >>> 24 ) );
                    break;
            }

            // Now deal with the next page
            pageData = pageIos[pageNb + 1].getData();
            pagePos = LINK_SIZE;

            switch ( remaining )
            {
                case 1:
                    pageData.put( pagePos, ( byte ) ( value >>> 16 ) );
                    // fallthrough !!!

                case 2:
                    pageData.put( pagePos + 2 - remaining, ( byte ) ( value >>> 8 ) );
                    // fallthrough !!!

                case 3:
                    pageData.put( pagePos + 3 - remaining, ( byte ) ( value ) );
                    break;
            }
        }
        else
        {
            // Store the value in the page at the selected position
            pageData.putInt( pagePos, value );
        }

        // Increment the position to reflect the addition of an Int (4 bytes)
        position += INT_SIZE;

        return position;
    }