/*
 * 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.index;

import java.io.IOException;
import org.apache.lucene.search.DocIdSetIterator;

abstract class DocValuesIterator extends DocIdSetIterator {

  /**
   * Advance the iterator to exactly {@code target} and return whether {@code target} has a value.
   * {@code target} must be greater than or equal to the current {@link #docID() doc ID} and must be
   * a valid doc ID, ie. &ge; 0 and &lt; {@code maxDoc}. After this method returns, {@link #docID()}
   * returns {@code target}.
   */
  public abstract boolean advanceExact(int target) throws IOException;
}
