/**
 * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>
 * PDF-AS has been contracted 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.knowcenter.wag.egov.egiz.sig.sigid;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;
import at.knowcenter.wag.egov.egiz.exceptions.SettingsException;

/**
 * @author tknall
 * 
 */
public class DetachedMOCIdFormatter implements IdFormatter {

   /**
    * Key value in property file
    */
   private static final String SIG_ID_PROPERTY_KEY = "default.moc.algorithm.id";

   /**
    * The log.
    */
   private static Log log = LogFactory.getLog(DetachedIdFormatter.class);
   
   private String algorithmId;
   
   public DetachedMOCIdFormatter(String algorithmId) {
      this.algorithmId = algorithmId;
   }

   /**
    * @see at.knowcenter.wag.egov.egiz.sig.sigid.IdFormatter#formatIds(java.lang.String[])
    */
   public String formatIds(String[] ids, String algorithmParams) {
      // read id from property file and use it
      String prefix = null;
      try {
         prefix = SettingsReader.getInstance().getValueFromKey(SIG_ID_PROPERTY_KEY);
      } catch (SettingsException e) {
         log.error(e.getMessage(), e);
      }
      prefix = StringUtils.defaultIfEmpty(this.algorithmId, prefix);
      
      // dferbas
      StringBuffer formattedIds = new StringBuffer(prefix);
      if (algorithmParams != null && algorithmParams.length() > 0) {
         formattedIds.append(":").append(algorithmParams);
      }
      formattedIds.append("@").append(ids[0]);
      return formattedIds.toString();          
      
   }

}