/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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 org.apache.mahout.math.flavor;

/** STRUCTURE HINT */
public enum TraversingStructureEnum {

  UNKNOWN,

  /**
   * Backing vectors are directly available as row views.
   */
  ROWWISE,

  /**
   * Column vectors are directly available as column views.
   */
  COLWISE,

  /**
   * Only some row-wise vectors are really present (can use iterateNonEmpty). Corresponds to
   * [[org.apache.mahout.math.SparseMatrix]].
   */
  SPARSEROWWISE,

  SPARSECOLWISE,

  SPARSEHASH,

  VECTORBACKED,

  BLOCKIFIED
}