/*
* 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.iosched.input.fetcher;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import java.io.IOException;
import java.util.Arrays;
import java.util.Map;
/**
* EntityFetcher that fetches entities from a set of files stored in CloudStorage.
*/
public class HTTPRemoteFilesEntityFetcher implements EntityFetcher {
private String[] filenames;
private JsonObject object;
public HTTPRemoteFilesEntityFetcher(String... filenames) {
this.filenames = filenames;
}
@Override
public JsonElement fetch(Enum<?> entityType, Map<String, String> params)
throws IOException {
// On the first call, read all the files
if (object == null) {
object = RemoteJsonHelper.mergeJsonFiles(null, filenames);
}
return object.get(entityType.name());
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "HTTPCloudStorageEntityFetcher(filenames="+Arrays.toString(filenames)+")";
}
}