content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.table.common.transform;
  
  import alluxio.AlluxioURI;
  import alluxio.table.common.CatalogPathUtils;
  import alluxio.util.CommonUtils;
  
  import org.apache.commons.lang3.time.FastDateFormat;
  
  import java.util.Date;
  import java.util.Locale;
  import java.util.TimeZone;
  
  /**
   * The context for generating transformation plans.
   */
  public class TransformContext {
    private static final FastDateFormat DATE_FORMAT =
        FastDateFormat.getInstance("yyyyMMdd-HHmmss-SSS", TimeZone.getDefault(), Locale.getDefault());
  
    private final String mDbName;
    private final String mTableName;
    private final String mIdentifier;
  
    /**
     * Creates an instance.
     *
     * @param dbName the database name
     * @param tableName the table name
     * @param identifier the identifier for this transformation
     */
    public TransformContext(String dbName, String tableName, String identifier) {
      mDbName = dbName;
      mTableName = tableName;
      mIdentifier = identifier;
    }
  
    /**
     * @return a newly generated path to a transformed partition
     */
    public AlluxioURI generateTransformedPath() {
      String random =
          String.format("%s-%s", DATE_FORMAT.format(new Date()), CommonUtils.randomAlphaNumString(5));
      // append a random identifier, to avoid collisions
      return CatalogPathUtils.getTablePathInternal(mDbName, mTableName).join(mIdentifier)
          .join(random);
    }
  }
  