jfix.db4o.xstream.converter.BlobConverter.java Source code

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Here is the source code for jfix.db4o.xstream.converter.BlobConverter.java

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/*
Copyright (C) 2016 maik.jablonski@jease.org
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program 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 General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package jfix.db4o.xstream.converter;

import java.io.File;

import jfix.db4o.Blob;

import org.apache.commons.io.FileUtils;

import com.thoughtworks.xstream.converters.SingleValueConverter;
import com.thoughtworks.xstream.core.util.Base64Encoder;

public class BlobConverter implements SingleValueConverter {

    public boolean canConvert(Class clazz) {
        return Blob.class.isAssignableFrom(clazz);
    }

    public String toString(Object obj) {
        try {
            File file = ((Blob) obj).getFile();
            if (file.exists()) {
                return new Base64Encoder().encode(FileUtils.readFileToByteArray(file));
            } else {
                return "";
            }
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    public Object fromString(String str) {
        Blob blob = new Blob();
        try {
            FileUtils.writeByteArrayToFile(blob.getFile(), new Base64Encoder().decode(str));
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage(), e);
        }
        return blob;
    }

}