| /* |
| * 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.sa; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.Iterator; |
| |
| import org.apache.cassandra.index.sasi.disk.OnDiskIndexBuilder; |
| import org.apache.cassandra.index.sasi.disk.TokenTreeBuilder; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| import org.apache.cassandra.utils.Pair; |
| |
| public class IntegralSA extends SA<ByteBuffer> |
| { |
| public IntegralSA(AbstractType<?> comparator, OnDiskIndexBuilder.Mode mode) |
| { |
| super(comparator, mode); |
| } |
| |
| public Term<ByteBuffer> getTerm(ByteBuffer termValue, TokenTreeBuilder tokens) |
| { |
| return new ByteTerm(charCount, termValue, tokens); |
| } |
| |
| public TermIterator finish() |
| { |
| return new IntegralSuffixIterator(); |
| } |
| |
| |
| private class IntegralSuffixIterator extends TermIterator |
| { |
| private final Iterator<Term<ByteBuffer>> termIterator; |
| |
| public IntegralSuffixIterator() |
| { |
| Collections.sort(terms, new Comparator<Term<?>>() |
| { |
| public int compare(Term<?> a, Term<?> b) |
| { |
| return a.compareTo(comparator, b); |
| } |
| }); |
| |
| termIterator = terms.iterator(); |
| } |
| |
| public ByteBuffer minTerm() |
| { |
| return terms.get(0).getTerm(); |
| } |
| |
| public ByteBuffer maxTerm() |
| { |
| return terms.get(terms.size() - 1).getTerm(); |
| } |
| |
| protected Pair<IndexedTerm, TokenTreeBuilder> computeNext() |
| { |
| if (!termIterator.hasNext()) |
| return endOfData(); |
| |
| Term<ByteBuffer> term = termIterator.next(); |
| return Pair.create(new IndexedTerm(term.getTerm(), false), term.getTokens().finish()); |
| } |
| } |
| } |