/*
 * Minio Java SDK for Amazon S3 Compatible Cloud Storage, (C) 2019 Minio, Inc.
 *
 * 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
 *
 * https://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.
 */

import io.minio.ComposeObjectArgs;
import io.minio.ComposeSource;
import io.minio.MinioClient;
import io.minio.ServerSideEncryption;
import io.minio.ServerSideEncryptionCustomerKey;
import io.minio.errors.MinioException;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;
import javax.crypto.spec.SecretKeySpec;

public class ComposeObject {
 /** MinioClient.composeObject() example. */
 public static void main(String[] args)
 throws IOException, NoSuchAlgorithmException, InvalidKeyException {
 try {
 /* play.min.io for test and development. */
 MinioClient minioClient =
 MinioClient.builder()
 .endpoint("https://play.min.io")
 .credentials("Q3AM3UQ867SPQQA43P2F", "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG")
 .build();

 /* Amazon S3: */
 // MinioClient minioClient =
 // MinioClient.builder()
 // .endpoint("https://s3.amazonaws.com")
 // .credentials("YOUR-ACCESSKEY", "YOUR-SECRETACCESSKEY")
 // .build();

 {
 // Create a ComposeSource to compose Object.
 List<ComposeSource> sources = new ArrayList<ComposeSource>();
 sources.add(
 ComposeSource.builder()
 .bucket("my-bucketname-one")
 .object("my-objectname-one")
 .build());
 sources.add(
 ComposeSource.builder()
 .bucket("my-bucketname-two")
 .object("my-objectname-two")
 .build());

 minioClient.composeObject(
 ComposeObjectArgs.builder()
 .bucket("my-destination-bucket")
 .object("my-destination-object")
 .sources(sources)
 .build());
 System.out.println("Object Composed successfully");
 }

 {
 ServerSideEncryptionCustomerKey srcSsec =
 new ServerSideEncryptionCustomerKey(
 new SecretKeySpec(
 "01234567890123456789012345678901".getBytes(StandardCharsets.UTF_8), "AES"));

 ServerSideEncryption sse =
 new ServerSideEncryptionCustomerKey(
 new SecretKeySpec(
 "12345678912345678912345678912345".getBytes(StandardCharsets.UTF_8), "AES"));

 List<ComposeSource> sources = new ArrayList<ComposeSource>();
 sources.add(
 ComposeSource.builder()
 .bucket("my-bucketname")
 .object("my-objectname-one")
 .ssec(srcSsec)
 .build());
 sources.add(
 ComposeSource.builder()
 .bucket("my-bucketname")
 .object("my-objectname-two")
 .ssec(srcSsec)
 .build());

 minioClient.composeObject(
 ComposeObjectArgs.builder()
 .bucket("my-destination-bucket")
 .object("my-destination-object")
 .sources(sources)
 .sse(sse)
 .build());
 System.out.println("Object Composed successfully");
 }

 } catch (MinioException e) {
 System.out.println("Error occurred: " + e);
 }
 }
}