1 /*
2 * Copyright 2012-2025 CodeLibs Project and the Others.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.codelibs.fess.thumbnail.impl;
17
18 import java.io.File;
19
20 /**
21 * Empty implementation of thumbnail generator that does not generate any thumbnails.
22 * This class is used as a no-op thumbnail generator when thumbnail generation is disabled
23 * or when no specific thumbnail generator is configured.
24 */
25 public class EmptyGenerator extends BaseThumbnailGenerator {
26
27 /**
28 * Default constructor.
29 */
30 public EmptyGenerator() {
31 super();
32 }
33
34 /**
35 * Generates a thumbnail for the specified ID and output file.
36 * This implementation always returns false, indicating no thumbnail was generated.
37 *
38 * @param thumbnailId the ID of the thumbnail to generate
39 * @param outputFile the output file where the thumbnail should be saved
40 * @return false always, as this generator does not create thumbnails
41 */
42 @Override
43 public boolean generate(final String thumbnailId, final File outputFile) {
44 return false;
45 }
46
47 /**
48 * Destroys this generator and releases any resources.
49 * This implementation does nothing as no resources are held.
50 */
51 @Override
52 public void destroy() {
53 // nothing
54 }
55 }