http://lucene.apache.org/lucene-parent/lucene-core: Apache Lucene Java Core (The Apache Software Foundation) 
/*
 * 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.util.bkd;


import java.io.Closeable;
import java.io.IOException;


One pass iterator through all points previously written with a PointWriter, abstracting away whether points are read from (offline) disk or simple arrays in heap. 
@lucene.internal
/** One pass iterator through all points previously written with a
 *  {@link PointWriter}, abstracting away whether points are read
 *  from (offline) disk or simple arrays in heap.
 *
 * @lucene.internal
 * */
public interface PointReader extends Closeable {

  
Returns false once iteration is done, else true. 
/** Returns false once iteration is done, else true. */
  boolean next() throws IOException;

  
Sets the packed value in the provided ByteRef 
/** Sets the packed value in the provided ByteRef */
  PointValue pointValue();

}