hadoop AbfsPermission 源码

haddop AbfsPermission 代码

文件路径：/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsPermission.java

/*
 * 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.hadoop.fs.azurebfs.services;

import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;

/**
 * The AbfsPermission for AbfsClient.
 */
public class AbfsPermission extends FsPermission {
  private static final int STICKY_BIT_OCTAL_VALUE = 01000;
  private final boolean aclBit;

  public AbfsPermission(Short aShort, boolean aclBitStatus) {
    super(aShort);
    this.aclBit = aclBitStatus;
  }

  public AbfsPermission(FsAction u, FsAction g, FsAction o) {
    super(u, g, o, false);
    this.aclBit = false;
  }

  /**
   * Returns true if there is also an ACL (access control list).
   *
   * @return boolean true if there is also an ACL (access control list).
   * @deprecated Get acl bit from the {@link org.apache.hadoop.fs.FileStatus}
   * object.
   */
  public boolean getAclBit() {
    return aclBit;
  }

  @Override
  public boolean equals(Object obj) {
    if (obj instanceof FsPermission) {
      FsPermission that = (FsPermission) obj;
      return this.getUserAction() == that.getUserAction()
          && this.getGroupAction() == that.getGroupAction()
          && this.getOtherAction() == that.getOtherAction()
          && this.getStickyBit() == that.getStickyBit();
    }
    return false;
  }

  /**
   * Create a AbfsPermission from a abfs symbolic permission string
   * @param abfsSymbolicPermission e.g. "rw-rw-rw-+" / "rw-rw-rw-"
   * @return a permission object for the provided string representation
   */
  public static AbfsPermission valueOf(final String abfsSymbolicPermission) {
    if (abfsSymbolicPermission == null) {
      return null;
    }

    final boolean isExtendedAcl = abfsSymbolicPermission.charAt(abfsSymbolicPermission.length() - 1) == '+';

    final String abfsRawSymbolicPermission = isExtendedAcl ? abfsSymbolicPermission.substring(0, abfsSymbolicPermission.length() - 1)
        : abfsSymbolicPermission;

    int n = 0;
    for (int i = 0; i < abfsRawSymbolicPermission.length(); i++) {
      n = n << 1;
      char c = abfsRawSymbolicPermission.charAt(i);
      n += (c == '-' || c == 'T' || c == 'S') ? 0: 1;
    }

    // Add sticky bit value if set
    if (abfsRawSymbolicPermission.charAt(abfsRawSymbolicPermission.length() - 1) == 't'
        || abfsRawSymbolicPermission.charAt(abfsRawSymbolicPermission.length() - 1) == 'T') {
      n += STICKY_BIT_OCTAL_VALUE;
    }

    return new AbfsPermission((short) n, isExtendedAcl);
  }

  /**
   * Check whether abfs symbolic permission string is a extended Acl
   * @param abfsSymbolicPermission e.g. "rw-rw-rw-+" / "rw-rw-rw-"
   * @return true if the permission string indicates the existence of an
   * extended ACL; otherwise false.
   */
  public static boolean isExtendedAcl(final String abfsSymbolicPermission) {
    if (abfsSymbolicPermission == null) {
      return false;
    }

    return abfsSymbolicPermission.charAt(abfsSymbolicPermission.length() - 1) == '+';
  }

  @Override
  public int hashCode() {
    return toShort();
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop AbfsAclHelper 源码

hadoop AbfsClient 源码

hadoop AbfsClientContext 源码

hadoop AbfsClientContextBuilder 源码

hadoop AbfsClientRenameResult 源码

hadoop AbfsClientThrottlingAnalyzer 源码

hadoop AbfsClientThrottlingIntercept 源码

hadoop AbfsCounters 源码

hadoop AbfsErrors 源码

hadoop AbfsHttpHeader 源码