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 }