| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. 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. |
| */ |
| |
| package org.apache.usergrid.corepersistence.rx.impl; |
| |
| |
| import org.apache.usergrid.persistence.collection.serialization.impl.migration.EntityIdScope; |
| import org.apache.usergrid.persistence.core.migration.data.MigrationDataProvider; |
| |
| import com.google.inject.Inject; |
| |
| import rx.Observable; |
| |
| |
| /** |
| * An observable that returns all entities in the collections |
| */ |
| public abstract class AbstractGraphVisitorImpl<T> implements MigrationDataProvider<T> { |
| |
| private final AllApplicationsObservable applicationObservable; |
| private final AllEntityIdsObservable allEntityIdsObservable; |
| |
| @Inject |
| public AbstractGraphVisitorImpl( AllApplicationsObservable applicationObservable, |
| final AllEntityIdsObservable allEntityIdsObservable ) { |
| |
| this.applicationObservable = applicationObservable; |
| this.allEntityIdsObservable = allEntityIdsObservable; |
| } |
| |
| |
| |
| @Override |
| public Observable<T> getData() { |
| return allEntityIdsObservable.getEntities( applicationObservable.getData() ).map( |
| entityIdScope -> generateData( entityIdScope ) ); |
| |
| } |
| |
| |
| /** |
| * Generate the data for the observable stream from the scope and the node id |
| * @param entityIdScope |
| * @return |
| */ |
| protected abstract T generateData(final EntityIdScope entityIdScope); |
| |
| |
| } |