/*
* Copyright 2014 Google Inc. 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 com.google.samples.apps.iosched.server.schedule.input.fetcher;
/**
* The simplest implementation of "dependency injection" ever.
*
* Isolates the decision of which EntityFetcher to use for entities saved as remote JSON files.
* Each environment (AppEngine or command line) should set the appropriate fetcher in
* the factory before first usage. No default is set on purpose, to raise errors earlier.
*/
public class RemoteFilesEntityFetcherFactory {
private static FetcherBuilder builder;
public static FetcherBuilder getBuilder() {
return builder;
}
public static void setBuilder(FetcherBuilder builder) {
RemoteFilesEntityFetcherFactory.builder = builder;
}
public static interface FetcherBuilder {
FetcherBuilder setSourceFiles(String... filenames);
EntityFetcher build();
}
}