public PDFParser(InputStream input) throws IOException 
{
        this(input, null);
}

Constructor.

Parameters:

input - The input stream that contains the PDF document.

Throws:

IOException - If there is an error initializing the stream.

 public PDFParser(InputStream input,
    RandomAccess rafi) throws IOException 
{
        super(input);
        this.raf = rafi;
}

Constructor to allow control over RandomAccessFile.

Parameters:

input - The input stream that contains the PDF document.

rafi - The RandomAccessFile to be used in internal COSDocument

Throws:

IOException - If there is an error initializing the stream.

 public PDFParser(InputStream input,
    RandomAccess rafi,
    boolean force) throws IOException 
{
        super(input);
        this.raf = rafi;
        this.forceParsing = force;
}

Constructor to allow control over RandomAccessFile. Also enables parser to skip corrupt objects to try and force parsing

Parameters:

input - The input stream that contains the PDF document.

rafi - The RandomAccessFile to be used in internal COSDocument

force - When true, the parser will skip corrupt pdf objects and will continue parsing at the next object in the file

Throws:

IOException - If there is an error initializing the stream.

 public COSDocument getDocument() throws IOException 
{
        if( document == null )
        {
            throw new IOException( "You must call parse() before calling getDocument()" );
        }
        return document;
}

This will get the document that was parsed. parse() must be called before this is called. When you are done with this document you must call close() on it to release resources.

 public FDFDocument getFDFDocument() throws IOException 
{
        return new FDFDocument( getDocument() );
}

This will get the FDF document that was parsed. When you are done with this document you must call close() on it to release resources.

 public PDDocument getPDDocument() throws IOException 
{
        return new PDDocument( getDocument() );
}

This will get the PD document that was parsed. When you are done with this document you must call close() on it to release resources.

 public  void parse() throws IOException 
{
        try
        {
            if ( raf == null )
            {
                if( tempDirectory != null )
                {
                    document = new COSDocument( tempDirectory );
                }
                else
                {
                    document = new COSDocument();
                }
            }
            else
            {
                document = new COSDocument( raf );
            }
            setDocument( document );
            parseHeader();
            //Some PDF files have garbage between the header and the
            //first object
            skipToNextObj();
            boolean wasLastParsedObjectEOF = false;
            try
            {
                while(true)
                {
                    if(pdfSource.isEOF())
                    {
                        break;
                    }
                    try
                    {
                        wasLastParsedObjectEOF = parseObject();
                    }
                    catch(IOException e)
                    {
                        if(forceParsing)
                        {
                            /*
                             * Warning is sent to the PDFBox.log and to the Console that
                             * we skipped over an object
                             */
                            log.warn("Parsing Error, Skipping Object", e);
                            skipToNextObj();
                        }
                        else
                        { 
                            throw e;
                        }
                    }
                    skipSpaces();
                }
                //Test if we saw a trailer section. If not, look for an XRef Stream (Cross-Reference Stream) 
                //to populate the trailer and xref information. For PDF 1.5 and above 
                if( document.getTrailer() == null )
                {
                    document.parseXrefStreams();
                }
                if( !document.isEncrypted() )
                {
                    document.dereferenceObjectStreams();
                }
                ConflictObj.resolveConflicts(document, conflictList);     
            }
            catch( IOException e )
            {
                /*
                 * PDF files may have random data after the EOF marker. Ignore errors if
                 * last object processed is EOF. 
                 */
                if( !wasLastParsedObjectEOF )
                {
                    throw e;
                } 
            }
        }
        catch( Throwable t )
        {
            //so if the PDF is corrupt then close the document and clear
            //all resources to it
            if( document != null )
            {
                document.close();
            }
            if( t instanceof IOException )
            {
                throw (IOException)t;
            }
            else
            {
                throw new WrappedIOException( t );
            }
        }
        finally
        {
            pdfSource.close();
        }
}

This will parse the stream and populate the COSDocument object. This will close the stream when it is done parsing.

 public  void setTempDirectory(File tmpDir) 
{
        tempDirectory = tmpDir;
}

This is the directory where pdfbox will create a temporary file for storing pdf document stream in. By default this directory will be the value of the system property java.io.tmpdir.