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package com.qcloud.cos.model;

import java.io.Serializable;


public class COSObjectId implements Serializable {
    private final String bucket;
    private final String key;
    /**
     * Optional and applicable only for get operation.
     */
    private final String versionId;

    public COSObjectId(String bucket, String key) {
        this(bucket, key, null);
    }

    /**
     * @param bucket the COS bucket name which must not be null
     * @param key the COS key name which must not be null
     * @param versionId optional version id
     */
    public COSObjectId(String bucket, String key, String versionId) {
        if (bucket == null || key == null)
            throw new IllegalArgumentException("bucket and key must be specified");
        this.bucket = bucket;
        this.key = key;
        this.versionId = versionId;
    }

    /**
     * @param builder must not be null.
     */
    public COSObjectId(COSObjectIdBuilder builder) {
        this.bucket = builder.getBucket();
        this.key = builder.getKey();
        this.versionId = builder.getVersionId();
    }

    public String getBucket() {
        return bucket;
    }

    public String getKey() {
        return key;
    }

    /**
     * Returns the version id which is optionally applicable for COS get (but not put) operations.
     */
    public String getVersionId() {
        return versionId;
    }

    @Override
    public String toString() {
        return "bucket: " + bucket + ", key: " + key + ", versionId: " + versionId;
    }
}