/*
 *  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.spring;

import java.util.Optional;

import javax.jdo.JDOException;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import org.apache.causeway.applib.services.exceprecog.RootCauseFinder;

@Configuration
public class CausewayModulePersistenceJdoSpring {

    @Bean
    public RootCauseFinder getJdoExceptionRootCauseFinder() {
        return (final Throwable ex) -> {
            if (ex instanceof JDOException) {
                final JDOException jdoException = (JDOException) ex;
                final Throwable[] nestedExceptions = jdoException.getNestedExceptions();
                return nestedExceptions != null
                        && nestedExceptions.length > 0
                        ? Optional.ofNullable(nestedExceptions[0])
                        : Optional.empty();
            }
            return Optional.empty();
        };
    }

}
