/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.configuration2.io;

import java.io.File;
import java.net.URL;

import org.apache.commons.lang3.StringUtils;

 A specialized implementation of FileLocationStrategy which checks whether the provided file name is already an absolute file name. 
 This strategy ignores the URL and the base path stored in the passed in FileLocator. It is only triggered by absolute names in the locator's fileName component. 
Since:
2.0/**
 * <p>
 * A specialized implementation of {@code FileLocationStrategy} which checks
 * whether the provided file name is already an absolute file name.
 * </p>
 * <p>
 * This strategy ignores the URL and the base path stored in the passed in
 * {@link FileLocator}. It is only triggered by absolute names in the locator's
 * {@code fileName} component.
 * </p>
 *
 * @since 2.0
 */
public class AbsoluteNameLocationStrategy implements FileLocationStrategy
{
    
{@inheritDoc} This implementation constructs a File object from the locator's file name (if defined). If this results in an absolute file name pointing to an existing file, the corresponding URL is returned. /**
     * {@inheritDoc} This implementation constructs a {@code File} object from
     * the locator's file name (if defined). If this results in an absolute file
     * name pointing to an existing file, the corresponding URL is returned.
     */
    @Override
    public URL locate(final FileSystem fileSystem, final FileLocator locator)
    {
        if (StringUtils.isNotEmpty(locator.getFileName()))
        {
            final File file = new File(locator.getFileName());
            if (file.isAbsolute() && file.exists())
            {
                return FileLocatorUtils.convertFileToURL(file);
            }
        }

        return null;
    }
}