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Neo4j kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see http://neo4j.org.

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.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.kernel.impl.security;

import java.util.Map;

import org.neo4j.graphdb.security.URLAccessRule;
import org.neo4j.graphdb.security.URLAccessValidationError;

public class URLAccessRules
{
    private static final URLAccessRule ALWAYS_PERMITTED = ( config, url ) -> url;

    private URLAccessRules()
    {
    }

    public static URLAccessRule alwaysPermitted()
    {
        return ALWAYS_PERMITTED;
    }

    private static final URLAccessRule FILE_ACCESS = new FileURLAccessRule();

    public static URLAccessRule fileAccess()
    {
        return FILE_ACCESS;
    }

    private static final URLAccessRule WEB_ACCESS = new WebURLAccessRule();

    public static URLAccessRule webAccess()
    {
        return WEB_ACCESS;
    }

    public static URLAccessRule combined( final Map urlAccessRules )
    {
        return ( config, url ) ->
        {
            String protocol = url.getProtocol();
            URLAccessRule protocolRule = urlAccessRules.get( protocol );
            if ( protocolRule == null )
            {
                throw new URLAccessValidationError( "loading resources via protocol '" + protocol +
                        "' is not permitted" );
            }
            return protocolRule.validate( config, url );
        };
    }
}