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The AWS Java SDK for Amazon S3 module holds the client classes that are used for communicating with Amazon Simple Storage Service
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/*
 * Copyright 2013-2024 Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.services.s3.transfer;

import com.amazonaws.services.s3.model.ResponseHeaderOverrides;
import com.fasterxml.jackson.annotation.JsonProperty;

/**
 * An opaque token that holds some private state and can be used to resume a
 * paused download operation.
 */
public final class PersistableDownload extends PersistableTransfer {

    static final String TYPE = "download";

    @JsonProperty
    private final String pauseType = TYPE;

    /** The bucket name in Amazon S3 from where the object has to be downloaded. */
    @JsonProperty
    private final String bucketName;

    /** The name of the object in Amazon S3 that has to be downloaded. */
    @JsonProperty
    private final String key;

    /** The version id of the object in Amazon S3 to download. */
    @JsonProperty
    private final String versionId;

    /** Optional member indicating the byte range of data to retrieve */
    @JsonProperty
    private final long[] range;

    /**
     * Optional field that overrides headers on the response.
     */
    @JsonProperty
    private final ResponseHeaderOverrides responseHeaders;

    /**
     * If enabled, the requester is charged for downloading the data from
     * Requester Pays Buckets.
     */
    @JsonProperty
    private final boolean isRequesterPays;

    /**
     * File where the downloaded data is written.
     */
    @JsonProperty
    private final String file;

    /**
     * The last part that has been successfully written into the downloaded file.
     */
    @JsonProperty
    private final Integer lastFullyDownloadedPartNumber;

    /**
     * Last Modified/created time on Amazon S3 for this object.
     */
    @JsonProperty
    private final long lastModifiedTime;

    @JsonProperty
    private final Long lastFullyDownloadedFilePosition;


    public PersistableDownload() {
        this(null, null, null, null, null, false, null, null, 0L, null);
    }

    public PersistableDownload(
            @JsonProperty(value = "bucketName") String bucketName,
            @JsonProperty(value = "key") String key,
            @JsonProperty(value = "versionId") String versionId,
            @JsonProperty(value = "range") long[] range,
            @JsonProperty(value = "responseHeaders") ResponseHeaderOverrides responseHeaders,
            @JsonProperty(value = "isRequesterPays") boolean isRequesterPays,
            @JsonProperty(value = "file") String file,
            @JsonProperty(value = "lastFullyDownloadedPartNumber") Integer lastFullyDownloadedPartNumber,
            @JsonProperty(value = "lastModifiedTime") long lastModifiedTime,
            @JsonProperty(value = "lastFullyDownloadedFilePosition") Long lastFullyDownloadedFilePosition) {
        this.bucketName = bucketName;
        this.key = key;
        this.versionId = versionId;
        this.range = range  == null ? null : range.clone();
        this.responseHeaders = responseHeaders;
        this.isRequesterPays = isRequesterPays;
        this.file = file;
        this.lastFullyDownloadedPartNumber = lastFullyDownloadedPartNumber;
        this.lastModifiedTime = lastModifiedTime;
        this.lastFullyDownloadedFilePosition = lastFullyDownloadedFilePosition;
    }

    public PersistableDownload(String bucketName, String key, String versionId, long[] range, ResponseHeaderOverrides responseHeaders, boolean requesterPays, String absolutePath, Integer lastFullyDownloadedPartNumber, long time) {
        this(bucketName,key,versionId,range, responseHeaders, requesterPays, absolutePath, lastFullyDownloadedPartNumber, time, 0L);
    }

    /**
     * Returns the name of the bucket.
     */
    String getBucketName() {
        return bucketName;
    }

    /**
     * Returns the name of the object.
     */
    String getKey() {
        return key;
    }

    /**
     * Returns the version id of the object.
     */
    String getVersionId() {
        return versionId;
    }

    /**
     * Returns the byte range of the object to download.
     */
    long[] getRange() {
        return range  == null ? null : range.clone();
    }

    /**
     * Returns the optional response headers.
     */
    ResponseHeaderOverrides getResponseHeaders() {
        return responseHeaders;
    }

    /**
     * Returns true if RequesterPays is enabled on the Amazon S3 bucket else
     * false.
     */
    boolean isRequesterPays() {
        return isRequesterPays;
    }

    /**
     * Returns the file where the object is to be downloaded.
     */
    String getFile() {
        return file;
    }

    String getPauseType() {
        return pauseType;
    }

    /**
     * Returns the last part number that was successfully written into the downloaded file.
     */
    Integer getLastFullyDownloadedPartNumber() {
        return lastFullyDownloadedPartNumber;
    }

    /**
     * Returns the last modified/created time of the object represented by
     * the bucketName and key.
     */
    Long getlastModifiedTime() {
        return lastModifiedTime;
    }

    Long getLastFullyDownloadedFilePosition() {
        return lastFullyDownloadedFilePosition;
    }
}