content: /**
   * 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.activemq.store.kahadb.disk.journal;
  
  import java.io.File;
  import java.io.IOException;
  
  import org.apache.activemq.store.kahadb.disk.util.LinkedNode;
  import org.apache.activemq.store.kahadb.disk.util.SequenceSet;
  import org.apache.activemq.util.IOHelper;
  import org.apache.activemq.util.RecoverableRandomAccessFile;
  
  /**
   * DataFile
   */
  public class DataFile extends LinkedNode<DataFile> implements Comparable<DataFile> {
  
      public final static byte STANDARD_LOG_FILE = 0x0;
  
      protected final File file;
      protected final Integer dataFileId;
      protected volatile int length;
      protected int typeCode = STANDARD_LOG_FILE;
      protected final SequenceSet corruptedBlocks = new SequenceSet();
      protected RecoverableRandomAccessFile appendRandomAccessFile;
  
      DataFile(File file, int number) {
          this.file = file;
          this.dataFileId = number;
          length = (int)(file.exists() ? file.length() : 0);
      }
  
      public File getFile() {
          return file;
      }
  
      public Integer getDataFileId() {
          return dataFileId;
      }
  
      public int getTypeCode() {
          return typeCode;
      }
  
      public void setTypeCode(int typeCode) {
          this.typeCode = typeCode;
      }
  
      public synchronized int getLength() {
          return length;
      }
  
      public void setLength(int length) {
          this.length = length;
      }
  
      public synchronized void incrementLength(int size) {
          length += size;
      }
  
      public synchronized void decrementLength(int size) {
          length -= size;
      }
  
      @Override
      public synchronized String toString() {
          return file.getName() + " number = " + dataFileId + " , length = " + length;
      }
  
      public synchronized RecoverableRandomAccessFile appendRandomAccessFile() throws IOException {
          if (appendRandomAccessFile == null) {
              appendRandomAccessFile = new RecoverableRandomAccessFile(file.getCanonicalPath(), "rw");
          }
          return appendRandomAccessFile;
      }
  
      public synchronized RecoverableRandomAccessFile openRandomAccessFile() throws IOException {
          return new RecoverableRandomAccessFile(file.getCanonicalPath(), "rw");
      }
  
      public synchronized void closeRandomAccessFile(RecoverableRandomAccessFile file) throws IOException {
          file.close();
          if (file == appendRandomAccessFile) {
              appendRandomAccessFile = null;
          }
      }
  
      public synchronized boolean delete() throws IOException {
          return file.delete();
      }
  
      public synchronized void move(File targetDirectory) throws IOException{
          IOHelper.moveFile(file, targetDirectory);
      }
  
      public SequenceSet getCorruptedBlocks() {
          return corruptedBlocks;
      }
  
      @Override
      public int compareTo(DataFile df) {
          return dataFileId - df.dataFileId;
      }
  
      @Override
      public boolean equals(Object o) {
          boolean result = false;
          if (o instanceof DataFile) {
              result = compareTo((DataFile)o) == 0;
          }
          return result;
      }
  
      @Override
      public int hashCode() {
          return dataFileId;
      }
  }
  