# OnceSchedule.java

    /*
     * Copyright (c) 2010-2012, Paul Merlin. All Rights Reserved.
     * Copyright (c) 2012, Niclas Hedhman. 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.library.scheduler.schedule.once;

    import org.qi4j.api.mixin.Mixins;
    import org.qi4j.library.scheduler.schedule.Schedule;

    @Mixins( OnceSchedule.OnceScheduleMixin.class )
    public interface OnceSchedule
        extends Schedule
    {
        abstract class OnceScheduleMixin
            implements OnceSchedule
        {
            private boolean running;

            @Override
            public void taskStarting()
            {
                running = true;
            }

            @Override
            public void taskCompletedSuccessfully()
            {
                running = false;
            }

            @Override
            public void taskCompletedWithException( RuntimeException ex )
            {
                running = false;
            }

            @Override
            public boolean isTaskRunning()
            {
                return running;
            }

            @Override
            public long nextRun( long from )
            {
                long runAt = start().get().getMillis();
                if( runAt >= from )
                {
                    return runAt;
                }
                return -1;
            }

            @Override
            public String presentationString()
            {
                return start().get().toString();
            }
        }

    }