001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hdfs.server.namenode;
019
020import org.apache.hadoop.classification.InterfaceAudience;
021import org.apache.hadoop.fs.permission.PermissionStatus;
022
023import com.google.common.base.Preconditions;
024
025/**
026 * The attributes of an inode.
027 */
028@InterfaceAudience.Private
029public interface INodeDirectoryAttributes extends INodeAttributes {
030  public Quota.Counts getQuotaCounts();
031
032  public boolean metadataEquals(INodeDirectoryAttributes other);
033  
034  /** A copy of the inode directory attributes */
035  public static class SnapshotCopy extends INodeAttributes.SnapshotCopy
036      implements INodeDirectoryAttributes {
037    public SnapshotCopy(byte[] name, PermissionStatus permissions,
038        AclFeature aclFeature, long modificationTime) {
039      super(name, permissions, aclFeature, modificationTime, 0L);
040    }
041
042    public SnapshotCopy(INodeDirectory dir) {
043      super(dir);
044    }
045
046    @Override
047    public Quota.Counts getQuotaCounts() {
048      return Quota.Counts.newInstance(-1, -1);
049    }
050
051    @Override
052    public boolean metadataEquals(INodeDirectoryAttributes other) {
053      return other != null
054          && this.getQuotaCounts().equals(other.getQuotaCounts())
055          && getPermissionLong() == other.getPermissionLong();
056    }
057  }
058
059  public static class CopyWithQuota extends INodeDirectoryAttributes.SnapshotCopy {
060    private final long nsQuota;
061    private final long dsQuota;
062
063
064    public CopyWithQuota(byte[] name, PermissionStatus permissions,
065        AclFeature aclFeature, long modificationTime, long nsQuota,
066        long dsQuota) {
067      super(name, permissions, aclFeature, modificationTime);
068      this.nsQuota = nsQuota;
069      this.dsQuota = dsQuota;
070    }
071
072    public CopyWithQuota(INodeDirectory dir) {
073      super(dir);
074      Preconditions.checkArgument(dir.isQuotaSet());
075      final Quota.Counts q = dir.getQuotaCounts();
076      this.nsQuota = q.get(Quota.NAMESPACE);
077      this.dsQuota = q.get(Quota.DISKSPACE);
078    }
079    
080    @Override
081    public Quota.Counts getQuotaCounts() {
082      return Quota.Counts.newInstance(nsQuota, dsQuota);
083    }
084  }
085}