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