| /* |
| * 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; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.cassandra.index.sasi.disk.OnDiskIndexBuilder.TermSize; |
| import org.apache.cassandra.index.sasi.utils.MappedBuffer; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| |
| import static org.apache.cassandra.index.sasi.disk.OnDiskIndexBuilder.IS_PARTIAL_BIT; |
| |
| public class Term |
| { |
| protected final MappedBuffer content; |
| protected final TermSize termSize; |
| |
| private final boolean hasMarkedPartials; |
| |
| public Term(MappedBuffer content, TermSize size, boolean hasMarkedPartials) |
| { |
| this.content = content; |
| this.termSize = size; |
| this.hasMarkedPartials = hasMarkedPartials; |
| } |
| |
| public ByteBuffer getTerm() |
| { |
| long offset = termSize.isConstant() ? content.position() : content.position() + 2; |
| int length = termSize.isConstant() ? termSize.size : readLength(content.position()); |
| |
| return content.getPageRegion(offset, length); |
| } |
| |
| public boolean isPartial() |
| { |
| return !termSize.isConstant() |
| && hasMarkedPartials |
| && (content.getShort(content.position()) & (1 << IS_PARTIAL_BIT)) != 0; |
| } |
| |
| public long getDataOffset() |
| { |
| long position = content.position(); |
| return position + (termSize.isConstant() ? termSize.size : 2 + readLength(position)); |
| } |
| |
| public int compareTo(AbstractType<?> comparator, ByteBuffer query) |
| { |
| return compareTo(comparator, query, true); |
| } |
| |
| public int compareTo(AbstractType<?> comparator, ByteBuffer query, boolean checkFully) |
| { |
| long position = content.position(); |
| int padding = termSize.isConstant() ? 0 : 2; |
| int len = termSize.isConstant() ? termSize.size : readLength(position); |
| |
| return content.comparePageTo(position + padding, checkFully ? len : Math.min(len, query.remaining()), comparator, query); |
| } |
| |
| private short readLength(long position) |
| { |
| return (short) (content.getShort(position) & ~(1 << IS_PARTIAL_BIT)); |
| } |
| } |