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MoveFileToFolder.java
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MoveFileToFolder.java
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// Copyright 2022 Google LLC
//
// 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.
// [START drive_move_file_to_folder]
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.auth.http.HttpCredentialsAdapter;
import com.google.auth.oauth2.GoogleCredentials;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
/* Class to demonstrate use case for moving file to folder.*/
public class MoveFileToFolder {
/**
* @param fileId Id of file to be moved.
* @param folderId Id of folder where the fill will be moved.
* @return list of parent ids for the file.
*/
public static List<String> moveFileToFolder(String fileId, String folderId)
throws IOException {
/* Load pre-authorized user credentials from the environment.
TODO(developer) - See https://developers.google.com/identity for
guides on implementing OAuth2 for your application.*/
GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
.createScoped(Arrays.asList(DriveScopes.DRIVE_FILE));
HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
credentials);
// Build a new authorized API client service.
Drive service = new Drive.Builder(new NetHttpTransport(),
GsonFactory.getDefaultInstance(),
requestInitializer)
.setApplicationName("Drive samples")
.build();
// Retrieve the existing parents to remove
File file = service.files().get(fileId)
.setFields("parents")
.execute();
StringBuilder previousParents = new StringBuilder();
for (String parent : file.getParents()) {
previousParents.append(parent);
previousParents.append(',');
}
try {
// Move the file to the new folder
file = service.files().update(fileId, null)
.setAddParents(folderId)
.setRemoveParents(previousParents.toString())
.setFields("id, parents")
.execute();
return file.getParents();
} catch (GoogleJsonResponseException e) {
// TODO(developer) - handle error appropriately
System.err.println("Unable to move file: " + e.getDetails());
throw e;
}
}
}
// [END drive_move_file_to_folder]