    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *     http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.configuration2.builder;
    018
    019import org.apache.commons.configuration2.ex.ConfigurationException;
    020import org.apache.commons.configuration2.io.FileHandler;
    021import org.apache.commons.configuration2.reloading.FileHandlerReloadingDetector;
    022import org.apache.commons.configuration2.reloading.ReloadingDetector;
    023
    024/**
    025 * <p>
    026 * A default implementation of the {@code ReloadingDetectorFactory} interface.
    027 * </p>
    028 * <p>
    029 * This factory creates objects of type {@link FileHandlerReloadingDetector}.
    030 * Instances have no state and can be shared between multiple builders.
    031 * </p>
    032 *
    033 * @since 2.0
    034 */
    035public class DefaultReloadingDetectorFactory implements
    036        ReloadingDetectorFactory
    037{
    038    @Override
    039    public ReloadingDetector createReloadingDetector(final FileHandler handler,
    040            final FileBasedBuilderParametersImpl params)
    041            throws ConfigurationException
    042    {
    043        final Long refreshDelay = params.getReloadingRefreshDelay();
    044
    045        final FileHandlerReloadingDetector fileHandlerReloadingDetector =
    046                (refreshDelay != null) ? new FileHandlerReloadingDetector(
    047                handler, refreshDelay) : new FileHandlerReloadingDetector(
    048                handler);
    049
    050        fileHandlerReloadingDetector.refresh();
    051
    052        return fileHandlerReloadingDetector;
    053    }
    054}