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This component provides management functionality and product surface for Neo4j instances.

There is a newer version: 5.23.0

/*
 * Copyright (c) 2002-2018 "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 .
 */
package org.neo4j.dbms.archive;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.AccessDeniedException;
import java.nio.file.FileSystemException;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;

import static java.nio.file.Files.exists;
import static java.nio.file.Files.isRegularFile;
import static java.nio.file.Files.isWritable;

public class Utils
{
    public static void checkWritableDirectory( Path directory ) throws FileSystemException
    {
        if ( !exists( directory ) )
        {
            throw new NoSuchFileException( directory.toString() );
        }
        if ( isRegularFile( directory ) )
        {
            throw new FileSystemException( directory.toString() + ": Not a directory" );
        }
        if ( !isWritable( directory ) )
        {
            throw new AccessDeniedException( directory.toString() );
        }
    }

    public static void copy( InputStream in, OutputStream out ) throws IOException
    {
        final byte[] buffer = new byte[8192];
        int n;
        while ( -1 != (n = in.read( buffer )) )
        {
            out.write( buffer, 0, n );
        }
    }
}