hadoop S3ListRequest 源码
haddop S3ListRequest 代码
文件路径：/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3ListRequest.java
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.fs.s3a;
import com.amazonaws.services.s3.model.ListObjectsRequest;
import com.amazonaws.services.s3.model.ListObjectsV2Request;
/**
* API version-independent container for S3 List requests.
*/
public final class S3ListRequest {
/**
* Format for the toString() method: {@value}.
*/
private static final String DESCRIPTION
= "List %s:/%s delimiter=%s keys=%d requester pays=%s";
private final ListObjectsRequest v1Request;
private final ListObjectsV2Request v2Request;
private S3ListRequest(ListObjectsRequest v1, ListObjectsV2Request v2) {
v1Request = v1;
v2Request = v2;
}
/**
* Restricted constructors to ensure v1 or v2, not both.
* @param request v1 request
* @return new list request container
*/
public static S3ListRequest v1(ListObjectsRequest request) {
return new S3ListRequest(request, null);
}
/**
* Restricted constructors to ensure v1 or v2, not both.
* @param request v2 request
* @return new list request container
*/
public static S3ListRequest v2(ListObjectsV2Request request) {
return new S3ListRequest(null, request);
}
/**
* Is this a v1 API request or v2?
* @return true if v1, false if v2
*/
public boolean isV1() {
return v1Request != null;
}
public ListObjectsRequest getV1() {
return v1Request;
}
public ListObjectsV2Request getV2() {
return v2Request;
}
@Override
public String toString() {
if (isV1()) {
return String.format(DESCRIPTION,
v1Request.getBucketName(), v1Request.getPrefix(),
v1Request.getDelimiter(), v1Request.getMaxKeys(),
v1Request.isRequesterPays());
} else {
return String.format(DESCRIPTION,
v2Request.getBucketName(), v2Request.getPrefix(),
v2Request.getDelimiter(), v2Request.getMaxKeys(),
v2Request.isRequesterPays());
}
}
}
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