Java Code Examples for org.apache.pdfbox.cos.COSArray#remove()

/**
 * Removes an attribute object.
 * 
 * @param attributeObject the attribute object
 */
public void removeAttribute(PDAttributeObject attributeObject)
{
    COSName key = COSName.A;
    COSBase a = this.getCOSObject().getDictionaryObject(key);
    if (a instanceof COSArray)
    {
        COSArray array = (COSArray) a;
        array.remove(attributeObject.getCOSObject());
        if ((array.size() == 2) && (array.getInt(1) == 0))
        {
            this.getCOSObject().setItem(key, array.getObject(0));
        }
    }
    else
    {
        COSBase directA = a;
        if (a instanceof COSObject)
        {
            directA = ((COSObject) a).getObject();
        }
        if (attributeObject.getCOSObject().equals(directA))
        {
            this.getCOSObject().setItem(key, null);
        }
    }
    attributeObject.setStructureElement(null);
}
 

/**
 * Removes a class name.
 * 
 * @param className the class name
 */
public void removeClassName(String className)
{
    if (className == null)
    {
        return;
    }
    COSName key = COSName.C;
    COSBase c = this.getCOSObject().getDictionaryObject(key);
    COSName name = COSName.getPDFName(className);
    if (c instanceof COSArray)
    {
        COSArray array = (COSArray) c;
        array.remove(name);
        if ((array.size() == 2) && (array.getInt(1) == 0))
        {
            this.getCOSObject().setItem(key, array.getObject(0));
        }
    }
    else
    {
        COSBase directC = c;
        if (c instanceof COSObject)
        {
            directC = ((COSObject) c).getObject();
        }
        if (name.equals(directC))
        {
            this.getCOSObject().setItem(key, null);
        }
    }
}
 

/**
 * Removes a user property.
 * 
 * @param userProperty the user property
 */
public void removeUserProperty(PDUserProperty userProperty)
{
    if (userProperty == null)
    {
        return;
    }
    COSArray p = (COSArray) this.getCOSObject().getDictionaryObject(COSName.P);
    p.remove(userProperty.getCOSObject());
    this.notifyChanged();
}
 

/**
 * removes a subject from the list
 *
 * @param subject byte array containing DER-encoded X.509v3 certificate
 */
public void removeSubject(byte[] subject)
{
    COSBase base = this.dictionary.getDictionaryObject(COSName.SUBJECT);
    if (base instanceof COSArray)
    {
        COSArray array = (COSArray) base;
        array.remove(new COSString(subject));
    }
}
 

/**
 * Removes a key usage extension
 *
 * @param keyUsageExtension ASCII string that consists of {0, 1, X}
 */
public void removeKeyUsage(String keyUsageExtension)
{
    COSBase base = this.dictionary.getDictionaryObject(COSName.KEY_USAGE);
    if (base instanceof COSArray)
    {
        COSArray array = (COSArray) base;
        array.remove(new COSString(keyUsageExtension));
    }
}
 

/**
 * Removes an issuer from the issuers list
 *
 * @param issuer A byte array containing DER-encoded X.509v3 certificate
 */
public void removeIssuer(byte[] issuer)
{
    COSBase base = this.dictionary.getDictionaryObject(COSName.ISSUER);
    if (base instanceof COSArray)
    {
        COSArray array = (COSArray) base;
        array.remove(new COSString(issuer));
    }
}
 

/**
 * removes an OID from the list
 *
 * @param oid the object identifier to be removed.
 */
public void removeOID(byte[] oid)
{
    COSBase base = this.dictionary.getDictionaryObject(COSName.OID);
    if (base instanceof COSArray)
    {
        COSArray array = (COSArray) base;
        array.remove(new COSString(oid));
    }
}
 

private int checkPagesDictionary(COSDictionary pagesDict, Set<COSObject> set)
{
    // check for kids
    COSBase kids = pagesDict.getDictionaryObject(COSName.KIDS);
    int numberOfPages = 0;
    if (kids instanceof COSArray)
    {
        COSArray kidsArray = (COSArray) kids;
        List<? extends COSBase> kidsList = kidsArray.toList();
        for (COSBase kid : kidsList)
        {
            if (!(kid instanceof COSObject) || set.contains((COSObject) kid))
            {
                kidsArray.remove(kid);
                continue;
            }
            COSObject kidObject = (COSObject) kid;
            COSBase kidBaseobject = kidObject.getObject();
            // object wasn't dereferenced -> remove it
            if (kidBaseobject == null || kidBaseobject.equals(COSNull.NULL))
            {
                LOG.warn("Removed null object " + kid + " from pages dictionary");
                kidsArray.remove(kid);
            }
            else if (kidBaseobject instanceof COSDictionary)
            {
                COSDictionary kidDictionary = (COSDictionary) kidBaseobject;
                COSName type = kidDictionary.getCOSName(COSName.TYPE);
                if (COSName.PAGES.equals(type))
                {
                    // process nested pages dictionaries
                    set.add(kidObject);
                    numberOfPages += checkPagesDictionary(kidDictionary, set);
                }
                else if (COSName.PAGE.equals(type))
                {
                    // count pages
                    numberOfPages++;
                }
            }
        }
    }
    // fix counter
    pagesDict.setInt(COSName.COUNT, numberOfPages);
    return numberOfPages;
}
 

/**
 * This will parse a PDF array object.
 *
 * @return The parsed PDF array.
 *
 * @throws IOException If there is an error parsing the stream.
 */
protected COSArray parseCOSArray() throws IOException
{
    long startPosition = seqSource.getPosition();
    readExpectedChar('[');
    COSArray po = new COSArray();
    COSBase pbo;
    skipSpaces();
    int i;
    while( ((i = seqSource.peek()) > 0) && ((char)i != ']') )
    {
        pbo = parseDirObject();
        if( pbo instanceof COSObject )
        {
            // We have to check if the expected values are there or not PDFBOX-385
            if (po.size() > 0 && po.get(po.size() - 1) instanceof COSInteger)
            {
                COSInteger genNumber = (COSInteger)po.remove( po.size() -1 );
                if (po.size() > 0 && po.get(po.size() - 1) instanceof COSInteger)
                {
                    COSInteger number = (COSInteger)po.remove( po.size() -1 );
                    COSObjectKey key = new COSObjectKey(number.longValue(), genNumber.intValue());
                    pbo = getObjectFromPool(key);
                }
                else
                {
                    // the object reference is somehow wrong
                    pbo = null;
                }
            }
            else
            {
                pbo = null;
            }
        }
        if( pbo != null )
        {
            po.add( pbo );
        }
        else
        {
            //it could be a bad object in the array which is just skipped
            LOG.warn("Corrupt object reference at offset " +
                    seqSource.getPosition() + ", start offset: " + startPosition);

            // This could also be an "endobj" or "endstream" which means we can assume that
            // the array has ended.
            String isThisTheEnd = readString();
            seqSource.unread(isThisTheEnd.getBytes(ISO_8859_1));
            if(ENDOBJ_STRING.equals(isThisTheEnd) || ENDSTREAM_STRING.equals(isThisTheEnd))
            {
                return po;
            }
        }
        skipSpaces();
    }
    // read ']'
    seqSource.read(); 
    skipSpaces();
    return po;
}