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Util.java
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Util.java
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/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.commandline;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Properties;
import javax.annotation.Nonnull;
import org.neo4j.commandline.admin.CommandFailed;
import org.neo4j.io.fs.DefaultFileSystemAbstraction;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.kernel.StoreLockException;
import org.neo4j.kernel.internal.locker.GlobalStoreLocker;
import org.neo4j.kernel.internal.locker.StoreLocker;
import static java.lang.String.format;
public class Util
{
private Util()
{
}
public static Path canonicalPath( Path path ) throws IllegalArgumentException
{
return canonicalPath( path.toFile() );
}
public static Path canonicalPath( String path ) throws IllegalArgumentException
{
return canonicalPath( new File( path ) );
}
public static Path canonicalPath( File file ) throws IllegalArgumentException
{
try
{
return Paths.get( file.getCanonicalPath() );
}
catch ( IOException e )
{
throw new IllegalArgumentException( "Unable to parse path: " + file, e );
}
}
public static boolean isSameOrChildFile( File parent, File candidate )
{
Path canonicalCandidate = canonicalPath( candidate );
Path canonicalParentPath = canonicalPath( parent );
return canonicalCandidate.startsWith( canonicalParentPath );
}
public static boolean isSameOrChildPath( Path parent, Path candidate )
{
Path normalizedCandidate = candidate.normalize();
Path normalizedParent = parent.normalize();
return normalizedCandidate.startsWith( normalizedParent );
}
public static void checkLock( Path databaseDirectory ) throws CommandFailed
{
try ( FileSystemAbstraction fileSystem = new DefaultFileSystemAbstraction();
StoreLocker storeLocker = new GlobalStoreLocker( fileSystem, databaseDirectory.toFile() ) )
{
storeLocker.checkLock();
}
catch ( StoreLockException e )
{
throw new CommandFailed( "the database is in use -- stop Neo4j and try again", e );
}
catch ( IOException e )
{
wrapIOException( e );
}
}
public static void wrapIOException( IOException e ) throws CommandFailed
{
throw new CommandFailed(
format( "unable to load database: %s: %s", e.getClass().getSimpleName(), e.getMessage() ), e );
}
/**
* @return the version of Neo4j as defined during the build
*/
@Nonnull
public static String neo4jVersion()
{
Properties props = new Properties();
try
{
props.load( Util.class.getResourceAsStream( "/org/neo4j/commandline/build.properties" ) );
return props.getProperty( "neo4jVersion" );
}
catch ( IOException e )
{
// This should never happen
throw new RuntimeException( e );
}
}
}