| /** |
| * 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.tools; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.permission.AclEntry; |
| import org.apache.hadoop.fs.permission.AclEntryType; |
| import org.apache.hadoop.fs.permission.AclEntryScope; |
| import org.apache.hadoop.fs.permission.AclUtil; |
| import org.apache.hadoop.fs.permission.FsAction; |
| import org.apache.hadoop.io.WritableUtils; |
| |
| import com.google.common.base.Objects; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| |
| /** |
| * CopyListingFileStatus is a specialized subclass of {@link FileStatus} for |
| * attaching additional data members useful to distcp. This class does not |
| * override {@link FileStatus#compareTo}, because the additional data members |
| * are not relevant to sort order. |
| */ |
| @InterfaceAudience.Private |
| public final class CopyListingFileStatus extends FileStatus { |
| |
| private static final byte NO_ACL_ENTRIES = -1; |
| private static final int NO_XATTRS = -1; |
| |
| // Retain static arrays of enum values to prevent repeated allocation of new |
| // arrays during deserialization. |
| private static final AclEntryType[] ACL_ENTRY_TYPES = AclEntryType.values(); |
| private static final AclEntryScope[] ACL_ENTRY_SCOPES = AclEntryScope.values(); |
| private static final FsAction[] FS_ACTIONS = FsAction.values(); |
| |
| private List<AclEntry> aclEntries; |
| private Map<String, byte[]> xAttrs; |
| |
| /** |
| * Default constructor. |
| */ |
| public CopyListingFileStatus() { |
| } |
| |
| /** |
| * Creates a new CopyListingFileStatus by copying the members of the given |
| * FileStatus. |
| * |
| * @param fileStatus FileStatus to copy |
| */ |
| public CopyListingFileStatus(FileStatus fileStatus) throws IOException { |
| super(fileStatus); |
| } |
| |
| /** |
| * Returns the full logical ACL. |
| * |
| * @return List containing full logical ACL |
| */ |
| public List<AclEntry> getAclEntries() { |
| return AclUtil.getAclFromPermAndEntries(getPermission(), |
| aclEntries != null ? aclEntries : Collections.<AclEntry>emptyList()); |
| } |
| |
| /** |
| * Sets optional ACL entries. |
| * |
| * @param aclEntries List containing all ACL entries |
| */ |
| public void setAclEntries(List<AclEntry> aclEntries) { |
| this.aclEntries = aclEntries; |
| } |
| |
| /** |
| * Returns all xAttrs. |
| * |
| * @return Map containing all xAttrs |
| */ |
| public Map<String, byte[]> getXAttrs() { |
| return xAttrs != null ? xAttrs : Collections.<String, byte[]>emptyMap(); |
| } |
| |
| /** |
| * Sets optional xAttrs. |
| * |
| * @param xAttrs Map containing all xAttrs |
| */ |
| public void setXAttrs(Map<String, byte[]> xAttrs) { |
| this.xAttrs = xAttrs; |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| super.write(out); |
| if (aclEntries != null) { |
| // byte is sufficient, because 32 ACL entries is the max enforced by HDFS. |
| out.writeByte(aclEntries.size()); |
| for (AclEntry entry: aclEntries) { |
| out.writeByte(entry.getScope().ordinal()); |
| out.writeByte(entry.getType().ordinal()); |
| WritableUtils.writeString(out, entry.getName()); |
| out.writeByte(entry.getPermission().ordinal()); |
| } |
| } else { |
| out.writeByte(NO_ACL_ENTRIES); |
| } |
| |
| if (xAttrs != null) { |
| out.writeInt(xAttrs.size()); |
| Iterator<Entry<String, byte[]>> iter = xAttrs.entrySet().iterator(); |
| while (iter.hasNext()) { |
| Entry<String, byte[]> entry = iter.next(); |
| WritableUtils.writeString(out, entry.getKey()); |
| final byte[] value = entry.getValue(); |
| if (value != null) { |
| out.writeInt(value.length); |
| if (value.length > 0) { |
| out.write(value); |
| } |
| } else { |
| out.writeInt(-1); |
| } |
| } |
| } else { |
| out.writeInt(NO_XATTRS); |
| } |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| super.readFields(in); |
| byte aclEntriesSize = in.readByte(); |
| if (aclEntriesSize != NO_ACL_ENTRIES) { |
| aclEntries = Lists.newArrayListWithCapacity(aclEntriesSize); |
| for (int i = 0; i < aclEntriesSize; ++i) { |
| aclEntries.add(new AclEntry.Builder() |
| .setScope(ACL_ENTRY_SCOPES[in.readByte()]) |
| .setType(ACL_ENTRY_TYPES[in.readByte()]) |
| .setName(WritableUtils.readString(in)) |
| .setPermission(FS_ACTIONS[in.readByte()]) |
| .build()); |
| } |
| } else { |
| aclEntries = null; |
| } |
| |
| int xAttrsSize = in.readInt(); |
| if (xAttrsSize != NO_XATTRS) { |
| xAttrs = Maps.newHashMap(); |
| for (int i = 0; i < xAttrsSize; ++i) { |
| final String name = WritableUtils.readString(in); |
| final int valueLen = in.readInt(); |
| byte[] value = null; |
| if (valueLen > -1) { |
| value = new byte[valueLen]; |
| if (valueLen > 0) { |
| in.readFully(value); |
| } |
| } |
| xAttrs.put(name, value); |
| } |
| } else { |
| xAttrs = null; |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!super.equals(o)) { |
| return false; |
| } |
| if (getClass() != o.getClass()) { |
| return false; |
| } |
| CopyListingFileStatus other = (CopyListingFileStatus)o; |
| return Objects.equal(aclEntries, other.aclEntries) && |
| Objects.equal(xAttrs, other.xAttrs); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(super.hashCode(), aclEntries, xAttrs); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(super.toString()); |
| sb.append('{'); |
| sb.append("aclEntries = " + aclEntries); |
| sb.append(", xAttrs = " + xAttrs); |
| sb.append('}'); |
| return sb.toString(); |
| } |
| } |