/**

  * Copyright 2005-2011 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/ecl2.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.core.api.CoreApiServiceLocator;

 /**

  * 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 (CoreApiServiceLocator.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 (CoreApiServiceLocator.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;

     }

 }