/*
 * 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.internal.nativeimpl;

public class AbsentNativeAccess implements NativeAccess {
    @Override
    public boolean isAvailable() {
        return false;
    }

    @Override
    public NativeCallResult tryEvictFromCache(int fd) {
        return NativeCallResult.SUCCESS;
    }

    @Override
    public NativeCallResult tryAdviseSequentialAccess(int fd) {
        return NativeCallResult.SUCCESS;
    }

    @Override
    public NativeCallResult tryAdviseToKeepInCache(int fd) {
        return NativeCallResult.SUCCESS;
    }

    @Override
    public NativeCallResult tryPreallocateSpace(int fd, long bytes) {
        return NativeCallResult.SUCCESS;
    }

    @Override
    public ErrorTranslator errorTranslator() {
        return MissingErrorTranslator.INSTANCE;
    }

    @Override
    public String describe() {
        return "Native access is not available for current platform.";
    }

    private static class MissingErrorTranslator implements ErrorTranslator {
        static final ErrorTranslator INSTANCE = new MissingErrorTranslator();

        private MissingErrorTranslator() {}

        @Override
        public boolean isOutOfDiskSpace(NativeCallResult callResult) {
            return false;
        }
    }
}
