net.snowflake.client.jdbc.cloud.storage.S3StorageObjectMetadata Maven / Gradle / Ivy

/*
 * Copyright (c) 2012-2018 Snowflake Computing Inc. All rights reserved.
 */
package net.snowflake.client.jdbc.cloud.storage;

import com.amazonaws.services.s3.model.ObjectMetadata;
import java.util.Map;

/**
 * Implementation of StorageObjectMetadata for S3 for remote storage object metadata.
 *
 *
 * @author ppaulus
 */
public class S3StorageObjectMetadata implements StorageObjectMetadata
{
  private ObjectMetadata s3Metadata;

  public S3StorageObjectMetadata(ObjectMetadata s3Metadata)
  {
    if (s3Metadata == null)
    {
      throw new IllegalArgumentException("s3Metadata must not be null");
    }
    this.s3Metadata = s3Metadata;
  }

  /**
   * @return returns a Map/key-value pairs of metadata properties
   */
  @Override
  public Map getUserMetadata()
  {
    return this.s3Metadata.getUserMetadata();
  }

  /**
   * @return returns the size of object in bytes
   */
  @Override
  public long getContentLength()
  {
    return this.s3Metadata.getContentLength();
  }

  /**
   * Sets size of the associated object in bytes
   * @param contentLength the length of content
   */
  @Override
  public void setContentLength(long contentLength)
  {
    this.s3Metadata.setContentLength(contentLength);
  }

  /**
   * Adds the key value pair of custom user-metadata for the associated object.
   * @param key the key of user metadata
   * @param value the value of user metadata
   */
  @Override
  public void addUserMetadata(String key, String value)
  {
    this.s3Metadata.addUserMetadata(key, value);
  }

  /**
   * Sets the optional Content-Encoding HTTP header specifying what content encodings,
   * have been applied to the object and what decoding mechanisms must be applied,
   * in order to obtain the media-type referenced by the Content-Type field.
   * @param encoding the encoding name using in HTTP header Content-Encoding
   */
  @Override
  public void setContentEncoding(String encoding)
  {
    this.s3Metadata.setContentEncoding(encoding);
  }

  /*
   * @return returns the content encoding type
   */
   @Override
   public String getContentEncoding()
   {
     return this.s3Metadata.getContentEncoding();
   }
}