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.nio.file.Path;
24 import java.util.HashMap;
25 import java.util.Map;
26
27 /**
28 * <p>
29 *
30 * Singleton that handles holding references to JavaFiles. This allows
31 * Alexandria to lookup and see if a file has already been parsed out and then
32 * it can load the information from memory instead of reparsing the file. </p>
33 * <p>
34 *
35 * Note. This assumes that the file will not be modified on disk while
36 * Alexandria is running. </p>
37 */
38 public class FileManager
39 {
40 /**
41 * The Singleton instance of this FileManager
42 */
43 private static FileManagerManager.html#FileManager">FileManager instance = new FileManager();
44
45 private Map<Path, JavaFile> files = new HashMap<>();
46
47 private String encoding = null;
48
49 /**
50 * Get an instance of the FileManager
51 */
52 public static FileManager getInstance()
53 {
54 return instance;
55 }
56
57 /**
58 * Get a file from it's name. If the file does not exist within the
59 * FileManager, create a new one and return it.
60 */
61 public JavaFile getFile( Path path )
62 throws IOException
63 {
64
65 JavaFile real = this.files.get( path );
66
67 if ( real == null )
68 {
69 real = new JavaFileImpl( path, this.getEncoding() );
70 this.addFile( real );
71 }
72
73 return real;
74 }
75
76 /**
77 * Add a file to this filemanager.
78 */
79 public void addFile( JavaFile file )
80 {
81 this.files.put( file.getPath(), file );
82 }
83
84 /**
85 * Encoding is the encoding of source files.
86 *
87 * @param encoding encoding of source files
88 */
89 public void setEncoding( String encoding )
90 {
91 this.encoding = encoding;
92 }
93
94 /**
95 * see setEncoding(String)
96 *
97 * @see #setEncoding(String)
98 */
99 public String getEncoding()
100 {
101 return encoding;
102 }
103 }