/*
    * The Kuali Financial System, a comprehensive financial management system for higher education.
    * 
    * Copyright 2005-2014 The Kuali Foundation
    * 
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero 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 Affero General Public License for more details.
   * 
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package org.kuali.rice.core.util.jaxb;
  
  import javax.xml.bind.MarshalException;
  import javax.xml.bind.UnmarshalException;
  import javax.xml.bind.annotation.adapters.NormalizedStringAdapter;
  import javax.xml.bind.annotation.adapters.XmlAdapter;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.coreservice.api.CoreServiceApiServiceLocator;
  
  /**
   * An XML adapter that simply validates the NameAndNamespacePair to ensure that the name and namespace are non-blank
   * and that the namespace code maps to a valid namespace in the system. This adapter will also pass the name to
   * a NormalizedStringAdapter instance for marshalling/unmarshalling.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class NameAndNamespacePairValidatingAdapter extends XmlAdapter<NameAndNamespacePair,NameAndNamespacePair> {
  
      /**
       * @see javax.xml.bind.annotation.adapters.XmlAdapter#unmarshal(java.lang.Object)
       */
      @Override
      public NameAndNamespacePair unmarshal(NameAndNamespacePair v) throws Exception {
          if (v != null) {
              
              if (StringUtils.isBlank(v.getName())) {
                  throw new UnmarshalException("Cannot import a name-and-namespace pair with a blank name");
              } else if (StringUtils.isBlank(v.getNamespaceCode())) {
                  throw new UnmarshalException("Cannot import a name-and-namespace pair with a blank namespace code");
              } if (CoreServiceApiServiceLocator.getNamespaceService().getNamespace(v.getNamespaceCode()) == null) {
                  throw new UnmarshalException("Cannot import a name-and-namespace pair with invalid or unknown namespace \"" +
                          v.getNamespaceCode() + "\"");
              }
              
              v.setName(new NormalizedStringAdapter().unmarshal(v.getName()));
              v.setNamespaceCode(v.getNamespaceCode());
          }
          return v;
      }
  
      /**
       * @see javax.xml.bind.annotation.adapters.XmlAdapter#marshal(java.lang.Object)
       */
      @Override
      public NameAndNamespacePair marshal(NameAndNamespacePair v) throws Exception {
          if (v != null) {
              if (StringUtils.isBlank(v.getName())) {
                  throw new MarshalException("Cannot export a name-and-namespace pair with a blank name");
              } else if (StringUtils.isBlank(v.getNamespaceCode())) {
                  throw new MarshalException("Cannot export a name-and-namespace pair with a blank namespace code");
              } else if (CoreServiceApiServiceLocator.getNamespaceService().getNamespace(v.getNamespaceCode()) == null) {
                  throw new MarshalException("Cannot export a name-and-namespace pair with invalid or unknown namespace \"" + v.getNamespaceCode() + "\"");
              }
              
              v.setName(new NormalizedStringAdapter().marshal(v.getName()));
              v.setNamespaceCode(v.getNamespaceCode());
          }
          return v;
      }
  
  }