# VersionMigrationBuilder.java

    /*
     * Copyright (c) 2009, 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.migration.assembly;

    import org.qi4j.migration.operation.RenameEntity;

    /**
     * Migration builder for a specific to-version.
     */
    public class VersionMigrationBuilder
    {
        MigrationBuilder builder;

        String fromVersion;
        String toVersion;

        public VersionMigrationBuilder( MigrationBuilder builder, String fromVersion, String toVersion )
        {
            this.builder = builder;
            this.fromVersion = fromVersion;
            this.toVersion = toVersion;
        }

        public VersionMigrationBuilder toVersion( String toVersion )
        {
            return new VersionMigrationBuilder( builder, this.toVersion, toVersion );
        }

        public VersionMigrationBuilder renameEntity( String fromName, String toName )
        {
            builder.entityMigrationRules()
                .addRule( new EntityMigrationRule( fromVersion, toVersion, new String[]{ fromName }, new RenameEntity( fromName, toName ) ) );

            return this;
        }

        public PackageMigrationBuilder renamePackage( String fromName, String toName )
        {
            return new PackageMigrationBuilder( builder, this, fromVersion, toVersion, fromName, toName );
        }

        public VersionMigrationBuilder atStartup( MigrationOperation operation )
        {
            builder.migrationRules().addRule( new MigrationRule( fromVersion, toVersion, operation ) );

            return this;
        }

        public EntityMigrationBuilder forEntities( String... entityTypes )
        {
            return new EntityMigrationBuilder( this, entityTypes );
        }
    }