| /** |
| * 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.kahadb.journal; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| |
| /** |
| * Allows you to open a data file in read only mode. Useful when working with |
| * archived data files. |
| */ |
| public class ReadOnlyDataFile extends DataFile { |
| |
| ReadOnlyDataFile(File file, int number, int preferedSize) { |
| super(file, number, preferedSize); |
| } |
| |
| public RandomAccessFile openRandomAccessFile(boolean appender) throws IOException { |
| return new RandomAccessFile(file, "r"); |
| } |
| |
| public void closeRandomAccessFile(RandomAccessFile file) throws IOException { |
| file.close(); |
| } |
| |
| public synchronized boolean delete() throws IOException { |
| throw new RuntimeException("Not valid on a read only file."); |
| } |
| |
| public synchronized void move(File targetDirectory) throws IOException{ |
| throw new RuntimeException("Not valid on a read only file."); |
| } |
| |
| } |