eu.europa.ec.markt.dss.signature.pdf.pdfbox.PdfBoxArray.java Source code

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Here is the source code for eu.europa.ec.markt.dss.signature.pdf.pdfbox.PdfBoxArray.java

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/*
 * DSS - Digital Signature Services
 *
 * Copyright (C) 2013 European Commission, Directorate-General Internal Market and Services (DG MARKT), B-1049 Bruxelles/Brussel
 *
 * Developed by: 2013 ARHS Developments S.A. (rue Nicolas Bov 2B, L-1253 Luxembourg) http://www.arhs-developments.com
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * "DSS - Digital Signature Services" is free software: you can redistribute it and/or modify it under the terms of
 * the GNU Lesser General Public License as published by the Free Software Foundation, either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * DSS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * "DSS - Digital Signature Services".  If not, see <http://www.gnu.org/licenses/>.
 */

package eu.europa.ec.markt.dss.signature.pdf.pdfbox;

import java.io.IOException;

import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSObject;
import org.apache.pdfbox.cos.COSStream;
import org.apache.pdfbox.pdmodel.PDDocument;

import eu.europa.ec.markt.dss.DSSUtils;
import eu.europa.ec.markt.dss.signature.pdf.PdfArray;
import eu.europa.ec.markt.dss.signature.pdf.PdfStream;

class PdfBoxArray implements PdfArray {

    COSArray wrapped;

    // Retain this reference ! PDDocument must not be garbage collected
    @SuppressWarnings("unused")
    private PDDocument document;

    public PdfBoxArray() {
        wrapped = new COSArray();
    }

    public PdfBoxArray(COSArray wrapped, PDDocument document) {
        this.wrapped = wrapped;
        this.document = document;
    }

    @Override
    public int size() {
        return wrapped.size();
    }

    @Override
    public byte[] getBytes(int i) throws IOException {
        COSBase val = wrapped.get(i);
        return toBytes(val);
    }

    private byte[] toBytes(COSBase val) throws IOException {
        COSStream cosStream = null;
        if (val instanceof COSObject) {
            COSObject o = (COSObject) val;
            final COSBase object = o.getObject();
            if (object instanceof COSStream) {
                cosStream = (COSStream) object;
            }
        }
        if (cosStream == null) {
            throw new RuntimeException("Cannot find value for " + val + " of class " + val.getClass());
        }
        final byte[] bytes = DSSUtils.toByteArray(cosStream.getUnfilteredStream());
        return bytes;
    }

    @Override
    public String toString() {
        return wrapped.toString();
    }

    @Override
    public void add(PdfStream stream) throws IOException {
        PdfBoxStream s = (PdfBoxStream) stream;
        wrapped.add(s.wrapped);
        wrapped.setNeedToBeUpdate(true);
    }
}