eu.europa.esig.dss.FileDocument.java Source code

Introduction

Here is the source code for eu.europa.esig.dss.FileDocument.java

Source

/**
 * DSS - Digital Signature Services
 * Copyright (C) 2015 European Commission, provided under the CEF programme
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * This library 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.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package eu.europa.esig.dss;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.IOUtils;

/**
 * Document implementation stored on file-system.
 *
 */
public class FileDocument extends CommonDocument {

    private final File file;

    /**
     * Create a FileDocument
     *
     * @param path the path to the file
     */
    public FileDocument(final String path) {
        this(new File(path));
    }

    /**
     * Create a FileDocument
     *
     * @param file {@code File}
     */
    public FileDocument(final File file) {
        if (file == null) {
            throw new NullPointerException();
        }
        if (!file.exists()) {
            throw new DSSException("File Not Found: " + file.getAbsolutePath());
        }
        this.file = file;
        this.name = file.getName();
        this.mimeType = MimeType.fromFileName(file.getName());
    }

    @Override
    public InputStream openStream() throws DSSException {
        final InputStream inputStream = DSSUtils.toInputStream(file);
        return inputStream;
    }

    public boolean exists() {
        return file.exists();
    }

    public File getParentFile() {
        return file.getParentFile();
    }

    @Override
    public String getAbsolutePath() {
        return file.getAbsolutePath();
    }

    @Override
    public byte[] getBytes() throws DSSException {
        final InputStream inputStream = openStream();
        final byte[] bytes = DSSUtils.toByteArray(inputStream);
        IOUtils.closeQuietly(inputStream);
        return bytes;
    }

    @Override
    public void save(final String path) throws IOException {
        final InputStream inputStream = openStream();
        DSSUtils.saveToFile(inputStream, path);
        IOUtils.closeQuietly(inputStream);
    }

    @Override
    public String getDigest(final DigestAlgorithm digestAlgorithm) {
        final InputStream inputStream = openStream();
        final byte[] digestBytes = DSSUtils.digest(digestAlgorithm, inputStream);
        IOUtils.closeQuietly(inputStream);
        final String base64Encode = Base64.encodeBase64String(digestBytes);
        return base64Encode;
    }

    @Override
    public String getBase64Encoded() {
        final InputStream inputStream = openStream();
        final byte[] bytes = DSSUtils.toByteArray(inputStream);
        IOUtils.closeQuietly(inputStream);
        return Base64.encodeBase64String(bytes);
    }
}