public PDThreadBead() 
{
        bead = new COSDictionary();
        bead.setName( "Type", "Bead" );
        setNextBead( this );
        setPreviousBead( this );
}

Default constructor.

 public PDThreadBead(COSDictionary b) 
{
        bead = b;
}

Constructor that is used for a preexisting dictionary.

Parameters:

b - The underlying dictionary.

 public  void appendBead(PDThreadBead append) 
{
        PDThreadBead nextBead = getNextBead();
        nextBead.setPreviousBead( append );
        append.setNextBead( nextBead );
        setNextBead( append );
        append.setPreviousBead( this );
}

Append a bead after this bead. This will correctly set the next/previous beads in the linked list.

 public COSBase getCOSObject() 
{
        return bead;
}

Convert this standard java object to a COS object.

 public COSDictionary getDictionary() 
{
        return bead;
}

This will get the underlying dictionary that this object wraps.

 public PDThreadBead getNextBead() 
{
        return new PDThreadBead( (COSDictionary) bead.getDictionaryObject( "N" ) );
}

This will get the next bead. If this bead is the last bead in the list then this will return the first bead.

 public PDPage getPage() 
{
        PDPage page = null;
        COSDictionary dic = (COSDictionary)bead.getDictionaryObject( "P" );
        if( dic != null )
        {
            page = new PDPage( dic );
        }
        return page;
}

Get the page that this bead is part of.

 public PDThreadBead getPreviousBead() 
{
        return new PDThreadBead( (COSDictionary) bead.getDictionaryObject( "V" ) );
}

This will get the previous bead. If this bead is the first bead in the list then this will return the last bead.

 public PDRectangle getRectangle() 
{
        PDRectangle rect = null;
        COSArray array = (COSArray)bead.getDictionaryObject( COSName.R );
        if( array != null )
        {
            rect = new PDRectangle( array );
        }
        return rect;
}

The rectangle on the page that this bead is part of.

 public PDThread getThread() 
{
        PDThread retval = null;
        COSDictionary dic = (COSDictionary)bead.getDictionaryObject( "T" );
        if( dic != null )
        {
            retval = new PDThread( dic );
        }
        return retval;
}

This will get the thread that this bead is part of. This is only required for the first bead in a thread, so other beads 'may' return null.

 protected  void setNextBead(PDThreadBead next) 
{
        bead.setItem( "N", next );
}

Set the next bead in the thread.

 public  void setPage(PDPage page) 
{
        bead.setItem( "P", page );
}

Set the page that this bead is part of. This is a required property and must be set when creating a new bead. The PDPage object also has a list of beads in the natural reading order. It is recommended that you add this object to that list as well.

 protected  void setPreviousBead(PDThreadBead previous) 
{
        bead.setItem( "V", previous );
}

Set the previous bead in the thread.

 public  void setRectangle(PDRectangle rect) 
{
        bead.setItem( COSName.R, rect );
}

Set the rectangle on the page that this bead covers.

 public  void setThread(PDThread thread) 
{
        bead.setItem( "T", thread );
}

Set the thread that this bead is part of. This is only required for the first bead in a thread. Note: This property is set for you by the PDThread.setFirstBead() method.