Package jfix.db4o.xstream.converter

Source Code of jfix.db4o.xstream.converter.BlobConverter

/*
    Copyright (C) 2010 maik.jablonski@gmail.com

    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);
    }
  }

  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);
    }
    return blob;
  }

}
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