1 package org.apache.maven.jxr.pacman; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import java.io.IOException; 23 import java.util.Hashtable; 24 25 /** 26 * <p> 27 * 28 * Singleton that handles holding references to JavaFiles. This allows 29 * Alexandria to lookup and see if a file has already been parsed out and then 30 * it can load the information from memory instead of reparsing the file. </p> 31 * <p> 32 * 33 * Note. This assumes that the file will not be modified on disk while 34 * Alexandria is running. </p> 35 */ 36 public class FileManager 37 { 38 39 /** 40 * The Singleton instance of this FileManager 41 */ 42 private static FileManager instance = new FileManager(); 43 44 private Hashtable files = new Hashtable(); 45 46 private String encoding = null; 47 48 /** 49 * Get an instance of the FileManager 50 */ 51 public static FileManager getInstance() 52 { 53 return instance; 54 } 55 56 /** 57 * Get a file from it's name. If the file does not exist within the 58 * FileManager, create a new one and return it. 59 */ 60 public JavaFile getFile( String name ) 61 throws IOException 62 { 63 64 JavaFile real = (JavaFile) this.files.get( name ); 65 66 if ( real == null ) 67 { 68 real = new JavaFileImpl( name, this.getEncoding() ); 69 this.addFile( real ); 70 } 71 72 return real; 73 } 74 75 /** 76 * Add a file to this filemanager. 77 */ 78 public void addFile( JavaFile file ) 79 { 80 this.files.put( file.getFilename(), file ); 81 } 82 83 /** 84 * Encoding is the encoding of source files. 85 * 86 * @param encoding encoding of source files 87 */ 88 public void setEncoding( String encoding ) 89 { 90 this.encoding = encoding; 91 } 92 93 /** 94 * see setEncoding(String) 95 * 96 * @see #setEncoding(String) 97 */ 98 public String getEncoding() 99 { 100 return encoding; 101 } 102 }