| /* |
| * 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.operation; |
| |
| import org.json.JSONException; |
| import org.json.JSONObject; |
| import org.qi4j.migration.Migrator; |
| import org.qi4j.migration.assembly.EntityMigrationOperation; |
| import org.qi4j.spi.entitystore.helpers.StateStore; |
| |
| /** |
| * Remove an association. Downgrading this operation will reset |
| * the property to the default value. |
| */ |
| public class RemoveAssociation |
| implements EntityMigrationOperation |
| { |
| private String association; |
| private String defaultValue; |
| |
| public RemoveAssociation( String association, String defaultReference ) |
| { |
| this.association = association; |
| this.defaultValue = defaultReference; |
| } |
| |
| @Override |
| public boolean upgrade( JSONObject state, StateStore stateStore, Migrator migrator ) |
| throws JSONException |
| { |
| return migrator.removeAssociation( state, association ); |
| } |
| |
| @Override |
| public boolean downgrade( JSONObject state, StateStore stateStore, Migrator migrator ) |
| throws JSONException |
| { |
| return migrator.addAssociation( state, association, defaultValue ); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "Remove association " + association + ", default:" + defaultValue; |
| } |
| } |