View Javadoc

1   /*
2    * Copyright 2002-2004 The Apache Software Foundation
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, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.jxpath.ri.compiler;
17  
18  import org.apache.commons.jxpath.ri.EvalContext;
19  import org.apache.commons.jxpath.ri.InfoSetUtil;
20  
21  /***
22   * Implementation of Expression for the operation "or".
23   *
24   * @author Dmitri Plotnikov
25   * @version $Revision: 1.3 $ $Date: 2004/02/29 14:17:38 $
26   */
27  public class CoreOperationOr extends CoreOperation {
28  
29      public CoreOperationOr(Expression[] args) {
30          super(args);
31      }
32  
33      public Object computeValue(EvalContext context) {
34          for (int i = 0; i < args.length; i++) {
35              if (InfoSetUtil.booleanValue(args[i].computeValue(context))) {
36                  return Boolean.TRUE;
37              }
38          }
39          return Boolean.FALSE;
40      }
41      
42      protected int getPrecedence() {
43          return 0;
44      }
45  
46      protected boolean isSymmetric() {
47          return true;
48      }
49      
50      public String getSymbol() {
51          return "or";
52      }
53  }