/*
* Copyright 2014 The Codehaus Foundation.
*
* Licensed 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.codehaus.plexus.components.io.attributes;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileOwnerAttributeView;
import java.nio.file.attribute.PosixFileAttributes;
import java.nio.file.attribute.PosixFilePermission;
import java.util.HashSet;
import java.util.Set;
/**
* @author Kristian Rosenvold
*/
public class Java7AttributeUtils
{
/*
Reads last-modified with proper failure handling if something goes wrong.
*/
public static long getLastModified( @Nonnull File file )
{
try
{
BasicFileAttributes basicFileAttributes = Files.readAttributes( file.toPath(), BasicFileAttributes.class );
return basicFileAttributes.lastModifiedTime().toMillis();
}
catch ( IOException e )
{
throw new RuntimeException( e );
}
}
public static void chmod( @Nonnull File file, int mode )
throws IOException
{
final Path path = file.toPath();
if ( !Files.isSymbolicLink( path ) )
{
Files.setPosixFilePermissions( path, getPermissions( mode ) );
}
}
@Nonnull
public static Set<PosixFilePermission> getPermissions( int mode )
{
Set<PosixFilePermission> perms = new HashSet<PosixFilePermission>();
//add owners permission
if ( ( mode & 0400 ) > 0 )
{
perms.add( PosixFilePermission.OWNER_READ );
}
if ( ( mode & 0200 ) > 0 )
{
perms.add( PosixFilePermission.OWNER_WRITE );
}
if ( ( mode & 0100 ) > 0 )
{
perms.add( PosixFilePermission.OWNER_EXECUTE );
}
//add group permissions
if ( ( mode & 0040 ) > 0 )
{
perms.add( PosixFilePermission.GROUP_READ );
}
if ( ( mode & 0020 ) > 0 )
{
perms.add( PosixFilePermission.GROUP_WRITE );
}
if ( ( mode & 0010 ) > 0 )
{
perms.add( PosixFilePermission.GROUP_EXECUTE );
}
//add others permissions
if ( ( mode & 0004 ) > 0 )
{
perms.add( PosixFilePermission.OTHERS_READ );
}
if ( ( mode & 0002 ) > 0 )
{
perms.add( PosixFilePermission.OTHERS_WRITE );
}
if ( ( mode & 0001 ) > 0 )
{
perms.add( PosixFilePermission.OTHERS_EXECUTE );
}
return perms;
}
@Nonnull
public static PosixFileAttributes getPosixFileAttributes( @Nonnull File file )
throws IOException
{
return Files.readAttributes( file.toPath(), PosixFileAttributes.class, LinkOption.NOFOLLOW_LINKS );
}
@Nonnull
public static BasicFileAttributes getFileAttributes( @Nonnull File file )
throws IOException
{
return getFileAttributes( file.toPath() );
}
public static BasicFileAttributes getFileAttributes( Path path )
throws IOException
{
if ( path.getFileSystem().supportedFileAttributeViews().contains( "posix" ) )
{
try
{
return Files.readAttributes( path, PosixFileAttributes.class, LinkOption.NOFOLLOW_LINKS );
}
catch ( UnsupportedOperationException ignore )
{
// Maybe ignoring is dramatic. Maybe not. But we do get the basic attrs anyqway
}
}
return Files.readAttributes( path, BasicFileAttributes.class, LinkOption.NOFOLLOW_LINKS );
}
@Nullable
public static FileOwnerAttributeView getFileOwnershipInfo( @Nonnull File file )
throws IOException
{
try
{
return Files.getFileAttributeView( file.toPath(), FileOwnerAttributeView.class, LinkOption.NOFOLLOW_LINKS );
}
catch ( UnsupportedOperationException e )
{
return null;
}
}
}