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1   /**
2    * This file Copyright (c) 2003-2010 Magnolia International
3    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
4    *
5    *
6    * This file is dual-licensed under both the Magnolia
7    * Network Agreement and the GNU General Public License.
8    * You may elect to use one or the other of these licenses.
9    *
10   * This file is distributed in the hope that it will be
11   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12   * implied warranty of MERCHANTABILITY or FITNESS FOR A
13   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14   * Redistribution, except as permitted by whichever of the GPL
15   * or MNA you select, is prohibited.
16   *
17   * 1. For the GPL license (GPL), you can redistribute and/or
18   * modify this file under the terms of the GNU General
19   * Public License, Version 3, as published by the Free Software
20   * Foundation.  You should have received a copy of the GNU
21   * General Public License, Version 3 along with this program;
22   * if not, write to the Free Software Foundation, Inc., 51
23   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24   *
25   * 2. For the Magnolia Network Agreement (MNA), this file
26   * and the accompanying materials are made available under the
27   * terms of the MNA which accompanies this distribution, and
28   * is available at http://www.magnolia-cms.com/mna.html
29   *
30   * Any modifications to this file must keep this entire header
31   * intact.
32   *
33   */
34  package info.magnolia.cms.gui.query;
35  
36  /**
37   * @author Sameer Charles $Id: AbstractExpressionImpl.java 32667 2010-03-13 00:37:06Z gjoseph $
38   */
39  public abstract class AbstractExpressionImpl implements SearchQueryExpression {
40  
41      /**
42       * previous pointer
43       */
44      private SearchQueryExpression left;
45  
46      /**
47       * next pointer
48       */
49      private SearchQueryExpression right;
50  
51      /**
52       * get left expression
53       * @return object on left
54       */
55      public SearchQueryExpression getLeft() {
56          return this.left;
57      }
58  
59      /**
60       * set left expression
61       * @param left object on left
62       */
63      public void setleft(SearchQueryExpression left) {
64          this.left = left;
65      }
66  
67      /**
68       * checks if has left
69       * @return true if left object exist
70       */
71      public boolean hasLeft() {
72          return (this.getLeft() != null);
73      }
74  
75      /**
76       * get right expression
77       * @return object on right
78       */
79      public SearchQueryExpression getRight() {
80          return this.right;
81      }
82  
83      /**
84       * set right expression
85       * @param right object on right
86       */
87      public void setRight(SearchQueryExpression right) {
88          this.right = right;
89      }
90  
91      /**
92       * checks if has right
93       * @return true if right object exist
94       */
95      public boolean hasRight() {
96          return (this.getRight() != null);
97      }
98  
99  }