1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.util.lucene;
21  
22  import com.liferay.portal.kernel.util.StringPool;
23  import com.liferay.portal.kernel.util.StringUtil;
24  
25  /**
26   * <a href="KeywordsUtil.java.html"><b><i>View Source</i></b></a>
27   *
28   * @author Brian Wing Shun Chan
29   * @author Mirco Tamburini
30   * @author Josiah Goh
31   *
32   */
33  public class KeywordsUtil {
34  
35      public static final String[] SPECIAL = new String[] {
36          "+", "-", "&&", "||", "!", "(", ")", "{", "}", "[", "]", "^", "\"", "~",
37          "*", "?", ":", "\\"
38      };
39  
40      public static String escape(String text) {
41          for (int i = SPECIAL.length - 1; i >= 0; i--) {
42              text = StringUtil.replace(
43                  text, SPECIAL[i], StringPool.BACK_SLASH + SPECIAL[i]);
44          }
45  
46          return text;
47      }
48  
49      public static String toFuzzy(String keywords) {
50          if (keywords == null) {
51              return null;
52          }
53  
54          if (!keywords.endsWith(StringPool.TILDE)) {
55              keywords = keywords + StringPool.TILDE;
56          }
57  
58          return keywords;
59      }
60  
61      public static String toWildcard(String keywords) {
62          if (keywords == null) {
63              return null;
64          }
65  
66          if (!keywords.endsWith(StringPool.STAR)) {
67              keywords = keywords + StringPool.STAR;
68          }
69  
70          return keywords;
71      }
72  
73  }