# ApplicationAssemblyFactoryImpl.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.runtime.bootstrap;

    import org.qi4j.bootstrap.ApplicationAssembly;
    import org.qi4j.bootstrap.ApplicationAssemblyFactory;
    import org.qi4j.bootstrap.Assembler;
    import org.qi4j.bootstrap.AssemblyException;
    import org.qi4j.bootstrap.LayerAssembly;
    import org.qi4j.bootstrap.ModuleAssembly;

    /**
     * Factory for ApplicationAssembly.
     */
    public final class ApplicationAssemblyFactoryImpl
        implements ApplicationAssemblyFactory
    {
        @Override
        public ApplicationAssembly newApplicationAssembly( Assembler assembler )
            throws AssemblyException
        {
            return newApplicationAssembly( new Assembler[][][]{ { { assembler } } } );
        }

        @Override
        public ApplicationAssembly newApplicationAssembly( Assembler[][][] assemblers )
            throws AssemblyException
        {
            ApplicationAssembly applicationAssembly = newApplicationAssembly();

            // Build all layers bottom-up
            LayerAssembly below = null;
            for( int layer = assemblers.length - 1; layer >= 0; layer-- )
            {
                // Create Layer
                LayerAssembly layerAssembly = applicationAssembly.layer( "Layer " + ( layer + 1 ) );
                for( int module = 0; module < assemblers[ layer ].length; module++ )
                {
                    // Create Module
                    ModuleAssembly moduleAssembly = layerAssembly.module( "Module " + ( module + 1 ) );
                    for( Assembler assembler : assemblers[ layer ][ module ] )
                    {
                        // Register Assembler
                        assembler.assemble( moduleAssembly );
                    }
                }
                if( below != null )
                {
                    layerAssembly.uses( below ); // Link layers
                }
                below = layerAssembly;
            }
            return applicationAssembly;
        }

        @Override
        public ApplicationAssembly newApplicationAssembly()
        {
            return new ApplicationAssemblyImpl();
        }
    }