| /* |
| * 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.memory; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.cassandra.db.DecoratedKey; |
| import org.apache.cassandra.index.sasi.conf.ColumnIndex; |
| import org.apache.cassandra.index.sasi.disk.Token; |
| import org.apache.cassandra.index.sasi.plan.Expression; |
| import org.apache.cassandra.index.sasi.utils.RangeIterator; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| |
| public abstract class MemIndex |
| { |
| protected final AbstractType<?> keyValidator; |
| protected final ColumnIndex columnIndex; |
| |
| protected MemIndex(AbstractType<?> keyValidator, ColumnIndex columnIndex) |
| { |
| this.keyValidator = keyValidator; |
| this.columnIndex = columnIndex; |
| } |
| |
| public abstract long add(DecoratedKey key, ByteBuffer value); |
| public abstract RangeIterator<Long, Token> search(Expression expression); |
| |
| public static MemIndex forColumn(AbstractType<?> keyValidator, ColumnIndex columnIndex) |
| { |
| return columnIndex.isLiteral() |
| ? new TrieMemIndex(keyValidator, columnIndex) |
| : new SkipListMemIndex(keyValidator, columnIndex); |
| } |
| } |