/*
    * Copyright 2011 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl1.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  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;
      }
  
  }