1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.search.lucene;
24  
25  import com.liferay.portal.kernel.io.unsync.UnsyncByteArrayInputStream;
26  import com.liferay.portal.kernel.util.CharPool;
27  import com.liferay.portal.kernel.util.FileUtil;
28  import com.liferay.portal.kernel.util.Validator;
29  import com.liferay.portal.util.PropsValues;
30  
31  import java.io.File;
32  import java.io.FileInputStream;
33  import java.io.IOException;
34  import java.io.InputStream;
35  
36  import org.apache.lucene.document.Field;
37  
38  /**
39   * <a href="LuceneFileExtractor.java.html"><b><i>View Source</i></b></a>
40   *
41   * @author Brian Wing Shun Chan
42   */
43  public class LuceneFileExtractor {
44  
45      public Field getFile(String field, InputStream is, String fileExt) {
46          String text = FileUtil.extractText(is, fileExt);
47  
48          if (Validator.isNotNull(
49                  PropsValues.LUCENE_FILE_EXTRACTOR_REGEXP_STRIP)) {
50  
51              text = regexpStrip(text);
52          }
53  
54          return LuceneFields.getText(field, text);
55      }
56  
57      public Field getFile(String field, byte[] bytes, String fileExt) {
58          InputStream is = new UnsyncByteArrayInputStream(bytes);
59  
60          return getFile(field, is, fileExt);
61      }
62  
63      public Field getFile(String field, File file, String fileExt)
64          throws IOException {
65  
66          InputStream is = new FileInputStream(file);
67  
68          return getFile(field, is, fileExt);
69      }
70  
71      protected String regexpStrip(String text) {
72          char[] array = text.toCharArray();
73  
74          for (int i = 0; i < array.length; i++) {
75              String s = String.valueOf(array[i]);
76  
77              if (!s.matches(PropsValues.LUCENE_FILE_EXTRACTOR_REGEXP_STRIP)) {
78                  array[i] = CharPool.SPACE;
79              }
80          }
81  
82          return new String(array);
83      }
84  
85  }