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

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

import java.util.HashMap;
import java.util.Map;

/**
 * Implements  platform-independent interface Azure BLOB object metadata
 *
 * Only the metadata accessors and mutators used by the JDBC client currently are supported,
 * additional methods should be added as needed
 *
 * @author lgiakoumakis
 *
 **/
public class AzureObjectMetadata implements StorageObjectMetadata
{
  private long contentLength;
  private Map userDefinedMetadata;
  private String contentEncoding;

  AzureObjectMetadata()
  {
    userDefinedMetadata = new HashMap<>();
  }

  /*
   * Constructs a Azure metadata object
   * from the set of parameters that the JDBC client is using
   */
  AzureObjectMetadata(long contentLength, String contentEncoding, Map userDefinedMetadata)
  {
    this.contentEncoding = contentEncoding;
    this.contentLength = contentLength;
    this.userDefinedMetadata = userDefinedMetadata;
  }

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

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

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

  /**
   * Adds the key value pair of custom user-metadata for the associated object.
   */
  @Override
  public void addUserMetadata(String key, String value)
  {
    userDefinedMetadata.put(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.
   */
  @Override
  public void setContentEncoding(String encoding)
  {
    contentEncoding = encoding;
  }

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