content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache 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.apache.org/licenses/LICENSE-2.0
   *
   *  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.apache.causeway.persistence.jdo.datanucleus.dialect;
  
  import java.util.Optional;
  
  import org.datanucleus.api.jdo.JDOAdapter;
  import org.datanucleus.exceptions.NucleusException;
  
  import org.springframework.dao.DataAccessException;
  
  import org.apache.causeway.commons.functional.Try;
  import org.apache.causeway.persistence.jdo.spring.integration.DefaultJdoDialect;
  import org.apache.causeway.persistence.jdo.spring.integration.JdoDialect;
  
  /**
   * Vendor (<i>Datanucleus</i>) specific implementation of <i>Spring's</i> {@link JdoDialect}
   * interface.
   *
   * @since 2.0 {@index}
   * @see JdoDialect
   */
  public class DnJdoDialect extends DefaultJdoDialect {
  
      public DnJdoDialect(final Object connectionFactory) {
          super(connectionFactory);
      }
  
      @Override
      public DataAccessException translateExceptionIfPossible(final RuntimeException cause) {
  
          var translatedException =
  
          Try.failure(cause)
  
          //XXX seems like a bug in DN, why do we need to unwrap this?
          .mapFailure(ex->ex instanceof IllegalArgumentException
                  ? ((IllegalArgumentException)ex).getCause()
                  : ex)
  
          // converts to JDOException
          .mapFailure(ex->ex instanceof NucleusException
                  ? JDOAdapter
                          .getJDOExceptionForNucleusException(((NucleusException)ex))
                  : ex)
  
          // converts to Spring's DataAccessException
          .mapFailure(ex->ex instanceof RuntimeException
                  ? Optional.<Throwable>ofNullable(super.translateExceptionIfPossible((RuntimeException)ex))
                          .orElse(ex)
                  : ex)
  
          .getFailure()
          .orElse(null);
  
          if(translatedException instanceof DataAccessException) {
              return (DataAccessException) translatedException;
          }
  
          // cannot translate
          return null;
  
      }
  
  }
  