AbstractSQLEntityStoreAssembler.java

/*
 * Copyright (c) 2010, Stanislav Muhametsin. All Rights Reserved.
 * Copyright (c) 2010, Paul Merlin. 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.entitystore.sql.assembly;

import java.io.IOException;
import org.qi4j.api.common.Visibility;
import org.qi4j.bootstrap.Assembler;
import org.qi4j.bootstrap.AssemblyException;
import org.qi4j.bootstrap.ModuleAssembly;
import org.qi4j.entitystore.sql.SQLEntityStoreService;
import org.qi4j.entitystore.sql.internal.DatabaseSQLService.DatabaseSQLServiceComposite;
import org.qi4j.entitystore.sql.internal.DatabaseSQLServiceCoreMixin;
import org.qi4j.entitystore.sql.internal.DatabaseSQLServiceSpi;
import org.qi4j.entitystore.sql.internal.DatabaseSQLServiceStatementsMixin;
import org.qi4j.entitystore.sql.internal.DatabaseSQLStringsBuilder;
import org.qi4j.library.sql.common.SQLConfiguration;
import org.qi4j.spi.uuid.UuidIdentityGeneratorService;
import org.sql.generation.api.vendor.SQLVendor;
import org.sql.generation.api.vendor.SQLVendorProvider;

/**
 * Base SQL EntityStore assembly.
 */
@SuppressWarnings( "unchecked" )
abstract class AbstractSQLEntityStoreAssembler<T extends AbstractSQLEntityStoreAssembler<?>>
    implements Assembler
{

    public static final String DEFAULT_ENTITYSTORE_IDENTITY = "entitystore-sql";
    private String identity = DEFAULT_ENTITYSTORE_IDENTITY;
    private Visibility visibility = Visibility.module;
    private ModuleAssembly configModule;
    private Visibility configVisibility = Visibility.module;

    public T identifiedBy( String identity )
    {
        this.identity = identity;
        return (T) this;
    }

    public T visibleIn( Visibility visibility )
    {
        this.visibility = visibility;
        return (T) this;
    }

    public T withConfig( ModuleAssembly configModule )
    {
        this.configModule = configModule;
        return (T) this;
    }

    public T withConfigVisibility( Visibility configVisibility )
    {
        this.configVisibility = configVisibility;
        return (T) this;
    }

    protected SQLVendor getSQLVendor()
        throws IOException
    {
        return SQLVendorProvider.createVendor( SQLVendor.class );
    }

    protected Class<?> getDatabaseStringBuilderMixin()
    {
        return DatabaseSQLStringsBuilder.CommonMixin.class;
    }

    protected abstract Class<?> getDatabaseSQLServiceSpecializationMixin();

    @Override
    public final void assemble( ModuleAssembly module )
        throws AssemblyException
    {
        if( configModule == null )
        {
            configModule = module;
        }
        try
        {
            SQLVendor sqlVendor = this.getSQLVendor();
            if( sqlVendor == null )
            {
                throw new AssemblyException( "SQL Vendor could not be determined." );
            }
            module.services( DatabaseSQLServiceComposite.class ).
                withMixins( DatabaseSQLServiceCoreMixin.class,
                            DatabaseSQLServiceSpi.CommonMixin.class,
                            getDatabaseStringBuilderMixin(),
                            DatabaseSQLServiceStatementsMixin.class,
                            getDatabaseSQLServiceSpecializationMixin() ).
                identifiedBy( identity ).
                visibleIn( Visibility.module ).
                setMetaInfo( sqlVendor );
        }
        catch( IOException ioe )
        {
            throw new AssemblyException( ioe );
        }
        module.services( SQLEntityStoreService.class,
                         UuidIdentityGeneratorService.class ).
            visibleIn( visibility );
        configModule.entities( SQLConfiguration.class ).
            visibleIn( configVisibility );
    }
}