class CryptFilter extends Filter
{
    @Override
    public DecodeResult decode(InputStream encoded, OutputStream decoded,
                                         COSDictionary parameters, int index) throws IOException
    {
        COSName encryptionName = parameters.getCOSName(COSName.NAME);
        if(encryptionName == null || encryptionName.equals(COSName.IDENTITY)) 
        {
            // currently the only supported implementation is the Identity crypt filter
            Filter identityFilter = new IdentityFilter();
            identityFilter.decode(encoded, decoded, parameters, index);
            return new DecodeResult(parameters);
        }
        throw new IOException("Unsupported crypt filter " + encryptionName.getName());
    }

    @Override
    protected void encode(InputStream input, OutputStream encoded, COSDictionary parameters)
            throws IOException
    {<FILL_FUNCTION_BODY>}
}

        COSName encryptionName = parameters.getCOSName(COSName.NAME);
        if(encryptionName == null || encryptionName.equals(COSName.IDENTITY))
        {
            // currently the only supported implementation is the Identity crypt filter
            Filter identityFilter = new IdentityFilter();
            identityFilter.encode(input, encoded, parameters);
        }
        else
        {
            throw new IOException("Unsupported crypt filter " + encryptionName.getName());
        }
    
<methods>public abstract org.apache.pdfbox.filter.DecodeResult decode(java.io.InputStream, java.io.OutputStream, org.apache.pdfbox.cos.COSDictionary, int) throws java.io.IOException,public org.apache.pdfbox.filter.DecodeResult decode(java.io.InputStream, java.io.OutputStream, org.apache.pdfbox.cos.COSDictionary, int, org.apache.pdfbox.filter.DecodeOptions) throws java.io.IOException,public static org.apache.pdfbox.io.RandomAccessRead decode(java.io.InputStream, List<org.apache.pdfbox.filter.Filter>, org.apache.pdfbox.cos.COSDictionary, org.apache.pdfbox.filter.DecodeOptions, List<org.apache.pdfbox.filter.DecodeResult>) throws java.io.IOException,public final void encode(java.io.InputStream, java.io.OutputStream, org.apache.pdfbox.cos.COSDictionary, int) throws java.io.IOException,public static final javax.imageio.ImageReader findImageReader(java.lang.String, java.lang.String) throws org.apache.pdfbox.filter.MissingImageReaderException,public static int getCompressionLevel() <variables>private static final Logger LOG,public static final java.lang.String SYSPROP_DEFLATELEVEL