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Apache Lucene (module: suggest)

There is a newer version: 10.0.0

/*
 * 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.lucene.search.spell;

/**
 * Set of strategies for suggesting related terms
 *
 * @lucene.experimental
 */
public enum SuggestMode {
  /** Generate suggestions only for terms not in the index (default) */
  SUGGEST_WHEN_NOT_IN_INDEX,

  /** Return only suggested words that are as frequent or more frequent than the searched word */
  SUGGEST_MORE_POPULAR,

  /**
   * Always attempt to offer suggestions (however, other parameters may limit suggestions. For
   * example, see {@link DirectSpellChecker#setMaxQueryFrequency(float)} ).
   */
  SUGGEST_ALWAYS
}