From c68ad0ec056b37c82debebcecfcde1866d61b4d9 Mon Sep 17 00:00:00 2001
From: tknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>
Date: Tue, 25 Nov 2008 12:03:13 +0000
Subject: Removing pdfbox from source.

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@301 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
---
 src/main/java/org/pdfbox/pdfwriter/COSWriter.java | 1091 ---------------------
 1 file changed, 1091 deletions(-)
 delete mode 100644 src/main/java/org/pdfbox/pdfwriter/COSWriter.java

(limited to 'src/main/java/org/pdfbox/pdfwriter/COSWriter.java')

diff --git a/src/main/java/org/pdfbox/pdfwriter/COSWriter.java b/src/main/java/org/pdfbox/pdfwriter/COSWriter.java
deleted file mode 100644
index fa9cf48..0000000
--- a/src/main/java/org/pdfbox/pdfwriter/COSWriter.java
+++ /dev/null
@@ -1,1091 +0,0 @@
-/**
- * Copyright (c) 2003-2005, www.pdfbox.org
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. Neither the name of pdfbox; nor the names of its
- *    contributors may be used to endorse or promote products derived from this
- *    software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * http://www.pdfbox.org
- *
- */
-package org.pdfbox.pdfwriter;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Hashtable;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.Set;
-
-import java.text.DecimalFormat;
-import java.text.NumberFormat;
-
-import org.pdfbox.persistence.util.COSObjectKey;
-
-import org.pdfbox.cos.COSBase;
-import org.pdfbox.cos.COSFloat;
-import org.pdfbox.cos.ICOSVisitor;
-import org.pdfbox.cos.COSName;
-import org.pdfbox.cos.COSString;
-import org.pdfbox.cos.COSBoolean;
-import org.pdfbox.cos.COSArray;
-import org.pdfbox.cos.COSDocument;
-import org.pdfbox.cos.COSStream;
-import org.pdfbox.cos.COSObject;
-import org.pdfbox.encryption.DocumentEncryption;
-import org.pdfbox.exceptions.COSVisitorException;
-import org.pdfbox.exceptions.CryptographyException;
-import org.pdfbox.cos.COSDictionary;
-import org.pdfbox.cos.COSInteger;
-import org.pdfbox.cos.COSNull;
-
-import org.pdfbox.pdmodel.PDDocument;
-
-import org.apache.log4j.Logger;
-
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-
-/**
- * this class acts on a in-memory representation of a pdf document.
- *
- * todo no support for incremental updates
- * todo single xref section only
- * todo no linearization
- *
- * @author Michael Traut
- * @author Ben Litchfield (ben@benlitchfield.com)
- * @version $Revision: 1.32 $
- */
-public class COSWriter implements ICOSVisitor
-{
-
-    private static Logger log = Logger.getLogger( COSWriter.class );
-    /**
-     * The dictionary open token.
-     */
-    public static final byte[] DICT_OPEN = "<<".getBytes();
-    /**
-     * The dictionary close token.
-     */
-    public static final byte[] DICT_CLOSE = ">>".getBytes();
-    /**
-     * space character.
-     */
-    public static final byte[] SPACE = " ".getBytes();
-    /**
-     * The start to a PDF comment.
-     */
-    public static final byte[] COMMENT = "%".getBytes();
-
-    /**
-     * The output version of the PDF.
-     */
-    public static final byte[] VERSION = "PDF-1.4".getBytes();
-    /**
-     * Garbage bytes used to create the PDF header.
-     */
-    public static final byte[] GARBAGE = new byte[] {(byte)0xf6, (byte)0xe4, (byte)0xfc, (byte)0xdf};
-    /**
-     * The EOF constant.
-     */
-    public static final byte[] EOF = "%%EOF".getBytes();
-    // pdf tokens
-
-    /**
-     * The reference token.
-     */
-    public static final byte[] REFERENCE = "R".getBytes();
-    /**
-     * The XREF token.
-     */
-    public static final byte[] XREF = "xref".getBytes();
-    /**
-     * The xref free token.
-     */
-    public static final byte[] XREF_FREE = "f".getBytes();
-    /**
-     * The xref used token.
-     */
-    public static final byte[] XREF_USED = "n".getBytes();
-    /**
-     * The trailer token.
-     */
-    public static final byte[] TRAILER = "trailer".getBytes();
-    /**
-     * The start xref token.
-     */
-    public static final byte[] STARTXREF = "startxref".getBytes();
-    /**
-     * The starting object token.
-     */
-    public static final byte[] OBJ = "obj".getBytes();
-    /**
-     * The end object token.
-     */
-    public static final byte[] ENDOBJ = "endobj".getBytes();
-    /**
-     * The array open token.
-     */
-    public static final byte[] ARRAY_OPEN = "[".getBytes();
-    /**
-     * The array close token.
-     */
-    public static final byte[] ARRAY_CLOSE = "]".getBytes();
-    /**
-     * The open stream token.
-     */
-    public static final byte[] STREAM = "stream".getBytes();
-    /**
-     * The close stream token.
-     */
-    public static final byte[] ENDSTREAM = "endstream".getBytes();
-
-    private NumberFormat formatXrefOffset = new DecimalFormat("0000000000");
-    /**
-     * The decimal format for the xref object generation number data.
-     */
-    private NumberFormat formatXrefGeneration = new DecimalFormat("00000");
-
-    private NumberFormat formatDecimal = NumberFormat.getNumberInstance( Locale.US );
-
-    // the stream where we create the pdf output
-    private OutputStream output;
-    // the stream used to write standard cos data
-    private COSStandardOutputStream standardOutput;
-
-    // the start position of the x ref section
-    private long startxref = 0;
-
-    // the current object number
-    private long number = 0;
-
-    // maps the object to the keys generated in the writer
-    // these are used for indirect refrences in other objects
-    //A hashtable is used on purpose over a hashmap 
-    //so that null entries will not get added.
-    private Map objectKeys = new Hashtable();
-
-    // the list of x ref entries to be made so far
-    private List xRefEntries = new ArrayList();
-
-    //A list of objects to write.
-    private List objectsToWrite = new ArrayList();
-
-    //a list of objects already written
-    private Set writtenObjects = new HashSet();
-    //An 'actual' is any COSBase that is not a COSObject.
-    //need to keep a list of the actuals that are added
-    //as well as the objects because there is a problem
-    //when adding a COSObject and then later adding
-    //the actual for that object, so we will track
-    //actuals separately.
-    private Set actualsAdded = new HashSet();
-    
-    private COSObjectKey currentObjectKey = null;
-    private PDDocument document = null;
-    private DocumentEncryption enc = null;
-
-    /**
-     * COSWriter constructor comment.
-     *
-     * @param os The wrapped output stream.
-     */
-    public COSWriter(OutputStream os)
-    {
-        super();
-        setOutput(os);
-        setStandardOutput(new COSStandardOutputStream(getOutput()));
-        formatDecimal.setMaximumFractionDigits( 10 );
-        formatDecimal.setGroupingUsed( false );
-    }
-    /**
-     * add an entry in the x ref table for later dump.
-     *
-     * @param entry The new entry to add.
-     */
-    protected void addXRefEntry(COSWriterXRefEntry entry)
-    {
-        getXRefEntries().add(entry);
-    }
-
-    /**
-     * This will close the stream.
-     *
-     * @throws IOException If the underlying stream throws an exception.
-     */
-    public void close() throws IOException
-    {
-        if (getStandardOutput() != null)
-        {
-            getStandardOutput().close();
-        }
-        if (getOutput() != null)
-        {
-            getOutput().close();
-        }
-    }
-
-    /**
-     * This will get the current object number.
-     *
-     * @return The current object number.
-     */
-    protected long getNumber()
-    {
-        return number;
-    }
-
-    /**
-     * This will get all available object keys.
-     *
-     * @return A map of all object keys.
-     */
-    public java.util.Map getObjectKeys()
-    {
-        return objectKeys;
-    }
-
-    /**
-     * This will get the output stream.
-     *
-     * @return The output stream.
-     */
-    protected java.io.OutputStream getOutput()
-    {
-        return output;
-    }
-
-    /**
-     * This will get the standard output stream.
-     *
-     * @return The standard output stream.
-     */
-    protected COSStandardOutputStream getStandardOutput()
-    {
-        return standardOutput;
-    }
-
-    /**
-     * This will get the current start xref.
-     *
-     * @return The current start xref.
-     */
-    protected long getStartxref()
-    {
-        return startxref;
-    }
-    /**
-     * This will get the xref entries.
-     *
-     * @return All available xref entries.
-     */
-    protected java.util.List getXRefEntries()
-    {
-        return xRefEntries;
-    }
-
-    /**
-     * This will set the current object number.
-     *
-     * @param newNumber The new object number.
-     */
-    protected void setNumber(long newNumber)
-    {
-        number = newNumber;
-    }
-
-    /**
-     * This will set the output stream.
-     *
-     * @param newOutput The new output stream.
-     */
-    private void setOutput( OutputStream newOutput )
-    {
-        output = newOutput;
-    }
-
-    /**
-     * This will set the standard output stream.
-     *
-     * @param newStandardOutput The new standard output stream.
-     */
-    private void setStandardOutput(COSStandardOutputStream newStandardOutput)
-    {
-        standardOutput = newStandardOutput;
-    }
-
-    /**
-     * This will set the start xref.
-     *
-     * @param newStartxref The new start xref attribute.
-     */
-    protected void setStartxref(long newStartxref)
-    {
-        startxref = newStartxref;
-    }
-
-    /**
-     * This will write the body of the document.
-     *
-     * @param doc The document to write the body for.
-     *
-     * @throws IOException If there is an error writing the data.
-     * @throws COSVisitorException If there is an error generating the data.
-     */
-    protected void doWriteBody(COSDocument doc) throws IOException, COSVisitorException
-    {
-        COSDictionary trailer = doc.getTrailer();
-        COSDictionary root = (COSDictionary)trailer.getDictionaryObject( COSName.ROOT );
-        COSDictionary info = (COSDictionary)trailer.getDictionaryObject( COSName.getPDFName( "Info" ) );
-        COSDictionary encrypt = (COSDictionary)trailer.getDictionaryObject( COSName.getPDFName( "Encrypt" ) );
-        if( root != null )
-        {
-            addObjectToWrite( root );
-        }
-        if( info != null )
-        {
-            addObjectToWrite( info );
-        }
-        
-
-        while( objectsToWrite.size() > 0 )
-        {
-            COSBase nextObject = (COSBase)objectsToWrite.remove( 0 );
-            doWriteObject( nextObject );
-        }
-        
-        document.clearWillEncryptWhenSaving();
-        if( encrypt != null )
-        {
-            addObjectToWrite( encrypt );
-        }
-        
-        while( objectsToWrite.size() > 0 )
-        {
-            COSBase nextObject = (COSBase)objectsToWrite.remove( 0 );
-            doWriteObject( nextObject );
-        }
-
-        // write all objects
-        /**
-        for (Iterator i = doc.getObjects().iterator(); i.hasNext();)
-        {
-            COSObject obj = (COSObject) i.next();
-            doWriteObject(obj);
-        }**/
-    }
-
-    private void addObjectToWrite( COSBase object )
-    {
-        COSBase actual = object;
-        if( actual instanceof COSObject )
-        {  
-            actual = ((COSObject)actual).getObject();
-        }
-        
-        if( !writtenObjects.contains( object ) &&
-            !objectsToWrite.contains( object ) &&
-            !actualsAdded.contains( actual ) )
-        {
-            objectsToWrite.add( object );
-            if( actual != null )
-            {
-                actualsAdded.add( actual );
-            }
-        }
-    }
-
-    /**
-     * This will write a COS object.
-     *
-     * @param obj The object to write.
-     *
-     * @throws COSVisitorException If there is an error visiting objects.
-     */
-    public void doWriteObject( COSBase obj ) throws COSVisitorException
-    {
-        try
-        {
-            writtenObjects.add( obj );
-            // find the physical reference
-            currentObjectKey = getObjectKey( obj );
-            // add a x ref entry
-            addXRefEntry( new COSWriterXRefEntry(getStandardOutput().getPos(), obj, currentObjectKey));
-            // write the object
-            getStandardOutput().write(String.valueOf(currentObjectKey.getNumber()).getBytes());
-            getStandardOutput().write(SPACE);
-            getStandardOutput().write(String.valueOf(currentObjectKey.getGeneration()).getBytes());
-            getStandardOutput().write(SPACE);
-            getStandardOutput().write(OBJ);
-            getStandardOutput().writeEOL();
-            obj.accept( this );
-            getStandardOutput().writeEOL();
-            getStandardOutput().write(ENDOBJ);
-            getStandardOutput().writeEOL();
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * This will write the header to the PDF document.
-     *
-     * @param doc The document to get the data from.
-     *
-     * @throws IOException If there is an error writing to the stream.
-     */
-    protected void doWriteHeader(COSDocument doc) throws IOException
-    {
-        getStandardOutput().write( doc.getHeaderString().getBytes() );
-        getStandardOutput().writeEOL();
-        getStandardOutput().write(COMMENT);
-        getStandardOutput().write(GARBAGE);
-        getStandardOutput().writeEOL();
-    }
-
-
-    /**
-     * This will write the trailer to the PDF document.
-     *
-     * @param doc The document to create the trailer for.
-     *
-     * @throws IOException If there is an IOError while writing the document.
-     * @throws COSVisitorException If there is an error while generating the data.
-     */
-    protected void doWriteTrailer(COSDocument doc) throws IOException, COSVisitorException
-    {
-        getStandardOutput().write(TRAILER);
-        getStandardOutput().writeEOL();
-
-        COSDictionary trailer = doc.getTrailer();
-        //sort xref, needed only if object keys not regenerated
-        Collections.sort(getXRefEntries());
-        COSWriterXRefEntry lastEntry = (COSWriterXRefEntry)getXRefEntries().get( getXRefEntries().size()-1);
-        trailer.setInt(COSName.getPDFName("Size"), (int)lastEntry.getKey().getNumber()+1);
-        trailer.removeItem( COSName.PREV );
-        /**
-        COSObject catalog = doc.getCatalog();
-        if (catalog != null)
-        {
-            trailer.setItem(COSName.getPDFName("Root"), catalog);
-        }
-        */
-        trailer.accept(this);
-
-        getStandardOutput().write(STARTXREF);
-        getStandardOutput().writeEOL();
-        getStandardOutput().write(String.valueOf(getStartxref()).getBytes());
-        getStandardOutput().writeEOL();
-        getStandardOutput().write(EOF);
-    }
-
-    /**
-     * write the x ref section for the pdf file
-     *
-     * currently, the pdf is reconstructed from the scratch, so we write a single section
-     *
-     * todo support for incremental writing?
-     *
-     * @param doc The document to write the xref from.
-     *
-     * @throws IOException If there is an error writing the data to the stream.
-     */
-    protected void doWriteXRef(COSDocument doc) throws IOException
-    {
-        String offset;
-        String generation;
-
-        // sort xref, needed only if object keys not regenerated
-        Collections.sort(getXRefEntries());
-        COSWriterXRefEntry lastEntry = (COSWriterXRefEntry)getXRefEntries().get( getXRefEntries().size()-1 );
-
-        // remember the position where x ref is written
-        setStartxref(getStandardOutput().getPos());
-        //
-        getStandardOutput().write(XREF);
-        getStandardOutput().writeEOL();
-        // write start object number and object count for this x ref section
-        // we assume starting from scratch
-        getStandardOutput().write(String.valueOf(0).getBytes());
-        getStandardOutput().write(SPACE);
-        getStandardOutput().write(String.valueOf(lastEntry.getKey().getNumber() + 1).getBytes());
-        getStandardOutput().writeEOL();
-        // write initial start object with ref to first deleted object and magic generation number
-        offset = formatXrefOffset.format(0);
-        generation = formatXrefGeneration.format(65535);
-        getStandardOutput().write(offset.getBytes());
-        getStandardOutput().write(SPACE);
-        getStandardOutput().write(generation.getBytes());
-        getStandardOutput().write(SPACE);
-        getStandardOutput().write(XREF_FREE);
-        getStandardOutput().writeCRLF();
-        // write entry for every object
-        long lastObjectNumber = 0;
-        for (Iterator i = getXRefEntries().iterator(); i.hasNext();)
-        {
-            COSWriterXRefEntry entry = (COSWriterXRefEntry) i.next();
-            while( lastObjectNumber<entry.getKey().getNumber()-1 )
-            {
-                offset = formatXrefOffset.format(0);
-                generation = formatXrefGeneration.format(65535);
-                getStandardOutput().write(offset.getBytes());
-                getStandardOutput().write(SPACE);
-                getStandardOutput().write(generation.getBytes());
-                getStandardOutput().write(SPACE);
-                getStandardOutput().write(XREF_FREE);
-                getStandardOutput().writeCRLF();
-                lastObjectNumber++;
-            }
-            lastObjectNumber = entry.getKey().getNumber();
-            offset = formatXrefOffset.format(entry.getOffset());
-            generation = formatXrefGeneration.format(entry.getKey().getGeneration());
-            getStandardOutput().write(offset.getBytes());
-            getStandardOutput().write(SPACE);
-            getStandardOutput().write(generation.getBytes());
-            getStandardOutput().write(SPACE);
-            getStandardOutput().write(entry.isFree() ? XREF_FREE : XREF_USED);
-            getStandardOutput().writeCRLF();
-        }
-    }
-
-    /**
-     * This will get the object key for the object.
-     *
-     * @param obj The object to get the key for.
-     *
-     * @return The object key for the object.
-     */
-    private COSObjectKey getObjectKey( COSBase obj )
-    {
-        COSBase actual = obj;
-        if( actual instanceof COSObject )
-        {
-            actual = ((COSObject)obj).getObject();
-        }
-        COSObjectKey key = null;
-        if( actual != null )
-        {
-            key = (COSObjectKey)objectKeys.get(actual);
-        }
-        if( key == null )
-        {
-            key = (COSObjectKey)objectKeys.get(obj);
-        }
-        if (key == null)
-        {
-            setNumber(getNumber()+1);
-            key = new COSObjectKey(getNumber(),0);
-            objectKeys.put(obj, key);
-            if( actual != null )
-            {
-                objectKeys.put(actual, key);
-            }
-        }
-        return key;
-    }
-
-    /**
-     * visitFromArray method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromArray( COSArray obj ) throws COSVisitorException
-    {
-        try
-        {
-            int count = 0;
-            getStandardOutput().write(ARRAY_OPEN);
-            for (Iterator i = obj.iterator(); i.hasNext();)
-            {
-                COSBase current = (COSBase) i.next();
-                if( current instanceof COSDictionary )
-                {
-                    addObjectToWrite( current );
-                    writeReference( current );
-                }
-                else if( current instanceof COSObject )
-                {
-                    COSBase subValue = ((COSObject)current).getObject();
-                    if( subValue instanceof COSDictionary || subValue == null )
-                    {
-                        addObjectToWrite( current );
-                        writeReference( current );
-                    }
-                    else
-                    {
-                        subValue.accept( this );
-                    }
-                }
-                else if( current == null )
-                {
-                    COSNull.NULL.accept( this );
-                }
-                else
-                {
-                    current.accept(this);
-                }
-                count++;
-                if (i.hasNext())
-                {
-                    if (count % 10 == 0)
-                    {
-                        getStandardOutput().writeEOL();
-                    }
-                    else
-                    {
-                        getStandardOutput().write(SPACE);
-                    }
-                }
-            }
-            getStandardOutput().write(ARRAY_CLOSE);
-            getStandardOutput().writeEOL();
-            return null;
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromBoolean method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromBoolean(COSBoolean obj) throws COSVisitorException
-    {
-        
-        try
-        {
-            obj.writePDF( getStandardOutput() );
-            return null;
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromDictionary method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromDictionary(COSDictionary obj) throws COSVisitorException
-    {
-        try
-        {
-            getStandardOutput().write(DICT_OPEN);
-            getStandardOutput().writeEOL();
-            for (Iterator i = obj.keyList().iterator(); i.hasNext();)
-            {
-                COSName name = (COSName) i.next();
-                COSBase value = obj.getItem(name);
-                if (value != null)
-                {
-                    // this is purely defensive, if entry is set to null instead of removed
-                    if( value != null )
-                    {
-                        name.accept(this);
-                        getStandardOutput().write(SPACE);
-                    }
-
-
-                    if( value == null )
-                    {
-                        log.debug( "Value is null" );
-                        //then we won't write anything, there are a couple cases
-                        //were the value of an entry in the COSDictionary will
-                        //be a dangling reference that points to nothing
-                        //so we will just not write out the entry if that is the case
-                    }
-                    else if( value instanceof COSDictionary )
-                    {
-                        addObjectToWrite( value );
-                        writeReference( value );
-                    }
-                    else if( value instanceof COSObject )
-                    {
-                        COSBase subValue = ((COSObject)value).getObject();
-                        if( subValue instanceof COSDictionary || subValue == null )
-                        {
-                            addObjectToWrite( value );
-                            writeReference( value );
-                        }
-                        else
-                        {
-                            subValue.accept( this );
-                        }
-                    }
-                    else
-                    {
-                        value.accept(this);
-                    }
-                    getStandardOutput().writeEOL();
-
-                }
-            }
-            getStandardOutput().write(DICT_CLOSE);
-            getStandardOutput().writeEOL();
-            return null;
-        }
-        catch( IOException e )
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * The visit from document method.
-     *
-     * @param doc The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromDocument(COSDocument doc) throws COSVisitorException
-    {
-        try
-        {
-            doWriteHeader(doc);
-            doWriteBody(doc);
-            doWriteXRef(doc);
-            doWriteTrailer(doc);
-            return null;
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromFloat method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromFloat(COSFloat obj) throws COSVisitorException
-    {
-        
-        try
-        {
-            obj.writePDF( getStandardOutput() );
-            return null;
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromFloat method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromInt(COSInteger obj) throws COSVisitorException
-    {
-        try
-        {
-            obj.writePDF( getStandardOutput() );
-            return null;
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromName method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromName(COSName obj) throws COSVisitorException
-    {
-        try
-        {
-            obj.writePDF( getStandardOutput() );
-            return null;
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromNull method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromNull(COSNull obj) throws COSVisitorException
-    {
-        try
-        {
-            obj.writePDF( getStandardOutput() );
-            return null;
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromObjRef method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     */
-    public void writeReference(COSBase obj) throws COSVisitorException
-    {
-        try
-        {
-            COSObjectKey  key = getObjectKey(obj);
-            getStandardOutput().write(String.valueOf(key.getNumber()).getBytes());
-            getStandardOutput().write(SPACE);
-            getStandardOutput().write(String.valueOf(key.getGeneration()).getBytes());
-            getStandardOutput().write(SPACE);
-            getStandardOutput().write(REFERENCE);
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromStream method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     *
-     * @return null
-     */
-    public Object visitFromStream(COSStream obj) throws COSVisitorException
-    {
-        try
-        {
-            if( document.willEncryptWhenSaving() )
-            {
-                enc.decryptStream( obj, currentObjectKey.getNumber(), currentObjectKey.getGeneration() );
-            }
-            
-            InputStream input = obj.getFilteredStream();
-            // set the length of the stream and write stream dictionary
-            COSObject lengthObject = new COSObject( null );
-            
-            obj.setItem(COSName.LENGTH, lengthObject);
-            //obj.accept(this);
-            // write the stream content
-            visitFromDictionary( obj );
-            getStandardOutput().write(STREAM);
-            getStandardOutput().writeCRLF();
-            byte[] buffer = new byte[1024];
-            int amountRead = 0;
-            int totalAmountWritten = 0;
-            while( (amountRead = input.read(buffer,0,1024)) != -1 )
-            {
-                getStandardOutput().write( buffer, 0, amountRead );
-                totalAmountWritten += amountRead;
-            }
-            lengthObject.setObject( new COSInteger( totalAmountWritten ) );
-            getStandardOutput().writeCRLF();
-            getStandardOutput().write(ENDSTREAM);
-            getStandardOutput().writeEOL();
-            return null;
-        }
-        catch( Exception e )
-        {
-            throw new COSVisitorException(e);
-        }
-    }
-
-    /**
-     * visitFromString method comment.
-     *
-     * @param obj The object that is being visited.
-     *
-     * @return null
-     *
-     * @throws COSVisitorException If there is an exception while visiting this object.
-     */
-    public Object visitFromString(COSString obj) throws COSVisitorException
-    {
-        try
-        {
-            if( document.willEncryptWhenSaving() )
-            {
-                try
-                {
-                    enc.decryptString( obj, currentObjectKey.getNumber(), currentObjectKey.getGeneration() );
-                }
-                catch( Exception e )
-                {
-                    throw new COSVisitorException( e );
-                }
-            }
-            obj.writePDF( getStandardOutput() );
-        }
-        catch (IOException e)
-        {
-            throw new COSVisitorException(e);
-        }
-        return null;
-    }
-
-    /**
-     * This will write the pdf document.
-     *
-     * @param doc The document to write.
-     *
-     * @throws COSVisitorException If an error occurs while generating the data.
-     */
-    public void write(COSDocument doc) throws COSVisitorException
-    {
-        PDDocument pdDoc = new PDDocument( doc );
-        write( pdDoc );
-    }
-
-    /**
-     * This will write the pdf document.
-     *
-     * @param doc The document to write.
-     *
-     * @throws COSVisitorException If an error occurs while generating the data.
-     */
-    public void write(PDDocument doc) throws COSVisitorException
-    {
-        document = doc;
-        if( document.willEncryptWhenSaving() )
-        {
-            try
-            {
-                enc = new DocumentEncryption(document);
-                enc.initForEncryption();
-            }
-            catch( CryptographyException e )
-            {
-                throw new COSVisitorException( e );
-            }
-            catch( IOException e )
-            {
-                throw new COSVisitorException( e );
-            }
-        }
-        COSDocument cosDoc = document.getDocument();
-        COSDictionary trailer = cosDoc.getTrailer();
-        COSArray idArray = (COSArray)trailer.getDictionaryObject( "ID" );
-        if( idArray == null )
-        {
-            try
-            {
-                
-                //algothim says to use time/path/size/values in doc to generate
-                //the id.  We don't have path or size, so do the best we can
-                MessageDigest md = MessageDigest.getInstance( "MD5" );
-                md.update( Long.toString( System.currentTimeMillis()).getBytes() );
-                COSDictionary info = (COSDictionary)trailer.getDictionaryObject( "Info" );
-                if( info != null )
-                {
-                    Iterator values = info.getValues().iterator();
-                    while( values.hasNext() )
-                    {
-                        md.update( values.next().toString().getBytes() );
-                    }
-                }
-                idArray = new COSArray();
-                COSString id = new COSString( md.digest() ); 
-                idArray.add( id );
-                idArray.add( id );
-                trailer.setItem( "ID", idArray );
-            }
-            catch( NoSuchAlgorithmException e )
-            {
-                throw new COSVisitorException( e );
-            }
-        }
-        
-        /*
-        List objects = doc.getObjects();
-        Iterator iter = objects.iterator();
-        long maxNumber = 0;
-        while( iter.hasNext() )
-        {
-            COSObject object = (COSObject)iter.next();
-            if( object.getObjectNumber() != null &&
-                object.getGenerationNumber() != null )
-            {
-                COSObjectKey key = new COSObjectKey( object.getObjectNumber().longValue(),
-                                                     object.getGenerationNumber().longValue() );
-                objectKeys.put( object.getObject(), key );
-                objectKeys.put( object, key );
-                maxNumber = Math.max( key.getNumber(), maxNumber );
-                setNumber( maxNumber );
-            }
-        }*/
-        cosDoc.accept(this);
-    }
-}
\ No newline at end of file
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