# ConcurrentEntityModificationException.java

    /*
     * Copyright (c) 2007, Rickard Öberg. All Rights Reserved.
     *
     * Licensed 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.qi4j.api.unitofwork;

    import org.qi4j.api.entity.EntityComposite;

    /**
     * This exception is thrown by UnitOfWork.complete() if any entities that are being committed
     * had been changed while the UnitOfWork was being executed.
     */
    public class ConcurrentEntityModificationException
        extends UnitOfWorkCompletionException
    {
        private static final long serialVersionUID = 3872723845064767689L;

        private final Iterable<EntityComposite> concurrentlyModifiedEntities;

        public ConcurrentEntityModificationException( Iterable<EntityComposite> concurrentlyModifiedEntities )
        {
            super("Entities changed concurrently :" + concurrentlyModifiedEntities);
            this.concurrentlyModifiedEntities = concurrentlyModifiedEntities;
        }

        public Iterable<EntityComposite> concurrentlyModifiedEntities()
        {
            return concurrentlyModifiedEntities;
        }
    }