/*
* Copyright 2016 Victor Albertos
*
* 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 io.rx_cache2.internal.migration;
import io.reactivex.Observable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.inject.Inject;
final class GetPendingMigrations {
private int cacheVersion;
private List<io.rx_cache2.MigrationCache> migrations;
@Inject GetPendingMigrations() {
}
GetPendingMigrations with(int currentCacheVersion, List<io.rx_cache2.MigrationCache> migrations) {
this.cacheVersion = currentCacheVersion;
this.migrations = migrations;
return this;
}
public Observable<List<io.rx_cache2.MigrationCache>> react() {
if (migrations == null || migrations.isEmpty()) {
return Observable.just((List<io.rx_cache2.MigrationCache>) new ArrayList<io.rx_cache2.MigrationCache>());
}
Collections.sort(migrations, new Comparator<io.rx_cache2.MigrationCache>() {
@Override public int compare(
io.rx_cache2.MigrationCache migration1, io.rx_cache2.MigrationCache migration2) {
return migration1.version() - migration2.version();
}
});
List<io.rx_cache2.MigrationCache> pendingMigrations = new ArrayList<>();
for (io.rx_cache2.MigrationCache migration : migrations) {
if (cacheVersion < migration.version()) {
pendingMigrations.add(migration);
}
}
return Observable.just(pendingMigrations);
}
}