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.io; 018 019import java.io.File; 020import java.net.URL; 021 022import org.apache.commons.lang3.StringUtils; 023 024/** 025 * <p> 026 * A specialized implementation of {@code FileLocationStrategy} which checks 027 * whether the provided file name is already an absolute file name. 028 * </p> 029 * <p> 030 * This strategy ignores the URL and the base path stored in the passed in 031 * {@link FileLocator}. It is only triggered by absolute names in the locator's 032 * {@code fileName} component. 033 * </p> 034 * 035 * @since 2.0 036 */ 037public class AbsoluteNameLocationStrategy implements FileLocationStrategy 038{ 039 /** 040 * {@inheritDoc} This implementation constructs a {@code File} object from 041 * the locator's file name (if defined). If this results in an absolute file 042 * name pointing to an existing file, the corresponding URL is returned. 043 */ 044 @Override 045 public URL locate(final FileSystem fileSystem, final FileLocator locator) 046 { 047 if (StringUtils.isNotEmpty(locator.getFileName())) 048 { 049 final File file = new File(locator.getFileName()); 050 if (file.isAbsolute() && file.exists()) 051 { 052 return FileLocatorUtils.convertFileToURL(file); 053 } 054 } 055 056 return null; 057 } 058}