| /* |
| * 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.cassandra.index.sasi.utils; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| |
| import org.apache.cassandra.index.sasi.disk.OnDiskIndex; |
| import org.apache.cassandra.index.sasi.disk.OnDiskIndex.DataTerm; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| |
| public class OnDiskIndexIterator extends RangeIterator<DataTerm, CombinedTerm> |
| { |
| private final AbstractType<?> comparator; |
| private final Iterator<DataTerm> terms; |
| |
| public OnDiskIndexIterator(OnDiskIndex index) |
| { |
| super(index.min(), index.max(), Long.MAX_VALUE); |
| |
| this.comparator = index.getComparator(); |
| this.terms = index.iterator(); |
| } |
| |
| public static RangeIterator<DataTerm, CombinedTerm> union(OnDiskIndex... union) |
| { |
| RangeUnionIterator.Builder<DataTerm, CombinedTerm> builder = RangeUnionIterator.builder(); |
| for (OnDiskIndex e : union) |
| { |
| if (e != null) |
| builder.add(new OnDiskIndexIterator(e)); |
| } |
| |
| return builder.build(); |
| } |
| |
| protected CombinedTerm computeNext() |
| { |
| return terms.hasNext() ? new CombinedTerm(comparator, terms.next()) : endOfData(); |
| } |
| |
| protected void performSkipTo(DataTerm nextToken) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void close() throws IOException |
| {} |
| } |