/*
 * Copyright 2011 by Graz University of Technology, Austria
 * MOCCA has been developed by the E-Government Innovation Center EGIZ, a joint
 * initiative of the Federal Chancellery Austria and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */



package at.gv.egiz.smcc.test.spring;

import java.beans.PropertyEditorSupport;
import java.io.ByteArrayOutputStream;

public class ByteArrayPropertyEditor extends PropertyEditorSupport {

  @Override
  public void setAsText(String text) throws IllegalArgumentException {
    
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    
    int hi = 0, n = 0;
    for (int i = 0; i < text.length(); i++) {
      int digit = Character.digit(text.charAt(i), 16);
      if (digit != -1) {
        if (n++ % 2 == 0) {
          hi = digit << 4; 
        } else {
          os.write(hi + digit);
        }
      }
    }
    
    if (n % 2 != 0) {
      throw new IllegalArgumentException();
    }
    
    setValue(os.toByteArray());
  }
  
}