Created
February 5, 2015 19:07
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describes an interface to migrate in a direction
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| /* | |
| * | |
| * * Licensed to the Apache Software Foundation (ASF) under one or more | |
| * * contributor license agreements. The ASF licenses this file to You | |
| * * 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. For additional information regarding | |
| * * copyright in this work, please see the NOTICE file in the top level | |
| * * directory of this distribution. | |
| * | |
| */ | |
| package org.apache.usergrid.persistence.core.migration.schema; | |
| /** | |
| * Interface to encapsulate directional migrations | |
| */ | |
| public interface MigrationStrategy<T> { | |
| /** | |
| * Returns the migration pattern to use | |
| * @return | |
| */ | |
| public MigrationRelationship<T> getMigration(); | |
| public int getMigrationVersion(); | |
| public class MigrationRelationship<T> { | |
| private final T from; | |
| private final T to; | |
| public MigrationRelationship(T from,T to){ | |
| this.from = from; | |
| this.to = to; | |
| } | |
| public T from(){ | |
| return from; | |
| } | |
| public T to(){ | |
| return to; | |
| } | |
| } | |
| } |
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