001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.maven.enforcer.rules.files; 020 021import javax.inject.Named; 022 023import java.io.File; 024import java.io.IOException; 025 026/** 027 * The Class RequireFilesExist. 028 */ 029@Named("requireFilesExist") 030public final class RequireFilesExist extends AbstractRequireFiles { 031 @Override 032 boolean checkFile(File file) { 033 // if we get here and the handle is null, treat it as a success 034 return file == null ? true : file.exists() && osIndependentNameMatch(file, true); 035 } 036 037 @Override 038 String getErrorMsg() { 039 return "Some required files are missing:" + System.lineSeparator(); 040 } 041 042 /** 043 * OSes like Windows are case insensitive, so this method will compare the file path with the actual path. A simple 044 * {@link File#exists()} is not enough for such OS. 045 * 046 * @param file the file to verify 047 * @param defaultValue value to return in case an IO exception occurs, should never happen as the file already 048 * exists 049 * @return 050 */ 051 private boolean osIndependentNameMatch(File file, boolean defaultValue) { 052 try { 053 File absFile; 054 if (!file.isAbsolute()) { 055 absFile = new File(new File(".").getCanonicalFile(), file.getPath()); 056 } else { 057 absFile = file; 058 } 059 060 return absFile.toURI().equals(absFile.getCanonicalFile().toURI()); 061 } catch (IOException e) { 062 return defaultValue; 063 } 064 } 065}