# UsedLayersInstance.java

    /*
     * Copyright (c) 2008, 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.runtime.structure;

    import java.util.List;
    import org.qi4j.api.common.Visibility;
    import org.qi4j.api.composite.TransientDescriptor;
    import org.qi4j.api.entity.EntityDescriptor;
    import org.qi4j.api.object.ObjectDescriptor;
    import org.qi4j.api.service.ServiceReference;
    import org.qi4j.api.value.ValueDescriptor;
    import org.qi4j.functional.Function;
    import org.qi4j.runtime.composite.TransientModel;
    import org.qi4j.runtime.entity.EntityModel;
    import org.qi4j.runtime.object.ObjectModel;
    import org.qi4j.runtime.value.ValueModel;
    import org.qi4j.spi.module.ModelModule;

    import static org.qi4j.functional.Iterables.*;

    /**
     * JAVADOC
     */
    public final class UsedLayersInstance
    {
        private final List<LayerInstance> usedLayerInstances;

        public UsedLayersInstance( List<LayerInstance> usedLayerInstances )
        {
            this.usedLayerInstances = usedLayerInstances;
        }

        /* package */ Iterable<ModelModule<ObjectDescriptor>> visibleObjects()
        {
            return flattenIterables( map( new Function<LayerInstance, Iterable<ModelModule<ObjectDescriptor>>>()
            {
                @Override
                public Iterable<ModelModule<ObjectDescriptor>> map( LayerInstance layerInstance )
                {
                    return layerInstance.visibleObjects( Visibility.application );
                }
            }, usedLayerInstances ) );
        }

        /* package */ Iterable<ModelModule<TransientDescriptor>> visibleTransients()
        {
            return flattenIterables( map( new Function<LayerInstance, Iterable<ModelModule<TransientDescriptor>>>()
            {
                @Override
                public Iterable<ModelModule<TransientDescriptor>> map( LayerInstance layerInstance )
                {
                    return layerInstance.visibleTransients( Visibility.application );
                }
            }, usedLayerInstances ) );
        }

        /* package */ Iterable<ModelModule<EntityDescriptor>> visibleEntities()
        {
            return flattenIterables( map( new Function<LayerInstance, Iterable<ModelModule<EntityDescriptor>>>()
            {
                @Override
                public Iterable<ModelModule<EntityDescriptor>> map( LayerInstance layerInstance )
                {
                    return layerInstance.visibleEntities( Visibility.application );
                }
            }, usedLayerInstances ) );
        }

        /* package */ Iterable<ModelModule<ValueDescriptor>> visibleValues()
        {
            return flattenIterables( map( new Function<LayerInstance, Iterable<ModelModule<ValueDescriptor>>>()
            {
                @Override
                public Iterable<ModelModule<ValueDescriptor>> map( LayerInstance layerInstance )
                {
                    return layerInstance.visibleValues( Visibility.application );
                }
            }, usedLayerInstances ) );
        }

        /* package */ Iterable<ServiceReference<?>> visibleServices()
        {
            return flattenIterables( map( new Function<LayerInstance, Iterable<ServiceReference<?>>>()
            {
                @Override
                public Iterable<ServiceReference<?>> map( LayerInstance layerInstance )
                {
                    return layerInstance.visibleServices( Visibility.application );
                }
            }, usedLayerInstances ) );
        }
    }