/*
 * 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 <http://www.gnu.org/licenses/>.
 */
package org.neo4j.io.pagecache.checking;

import java.io.IOException;
import org.neo4j.io.pagecache.DelegatingPagedFile;
import org.neo4j.io.pagecache.PageCursor;
import org.neo4j.io.pagecache.PagedFile;
import org.neo4j.io.pagecache.context.CursorContext;

public class AccessCheckingPagedFile extends DelegatingPagedFile {
    public AccessCheckingPagedFile(PagedFile delegate) {
        super(delegate);
    }

    @Override
    public PageCursor io(long pageId, int pf_flags, CursorContext context) throws IOException {
        PageCursor delegate = super.io(pageId, pf_flags, context);
        if ((pf_flags & PagedFile.PF_SHARED_READ_LOCK) != 0) {
            return new AccessCheckingReadPageCursor(delegate);
        }
        return delegate;
    }
}
