/*
* 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.spatial.prefix;
import java.util.Iterator;
import org.apache.lucene.spatial.prefix.tree.Cell;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.BytesRefIterator;
/**
* A reset'able {@link org.apache.lucene.util.BytesRefIterator} wrapper around
* an {@link java.util.Iterator} of {@link org.apache.lucene.spatial.prefix.tree.Cell}s.
*
* @see PrefixTreeStrategy#newCellToBytesRefIterator()
*
* @lucene.internal
*/
public class CellToBytesRefIterator implements BytesRefIterator {
protected Iterator<Cell> cellIter;
protected BytesRef bytesRef = new BytesRef();
public void reset(Iterator<Cell> cellIter) {
this.cellIter = cellIter;
}
@Override
public BytesRef next() {
if (!cellIter.hasNext()) {
return null;
}
return cellIter.next().getTokenBytesWithLeaf(bytesRef);
}
}