1    /* 
2     * Copyright 2000-2005 JetBrains s.r.o. 
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 com.intellij.lang.javascript.psi.impl; 
17    
18   import com.intellij.lang.ASTNode; 
19   import com.intellij.lang.javascript.JSElementTypes; 
20   import com.intellij.lang.javascript.JSTokenTypes; 
21   import com.intellij.lang.javascript.psi.JSBinaryExpression; 
22   import com.intellij.lang.javascript.psi.JSElementVisitor; 
23   import com.intellij.lang.javascript.psi.JSExpression; 
24   import com.intellij.openapi.diagnostic.Logger; 
25   import com.intellij.psi.PsiElementVisitor; 
26   import com.intellij.psi.tree.IElementType; 
27   import com.intellij.psi.tree.TokenSet; 
28    
29   /** 
30    * Created by IntelliJ IDEA. 
31    * User: max 
32    * Date: Jan 30, 2005 
33    * Time: 11:41:42 PM 
34    * To change this template use File | Settings | File Templates. 
35    */ 
36   public class JSBinaryExpressionImpl extends JSElementImpl implements JSBinaryExpression { 
37     private static final Logger LOG = Logger.getInstance("#com.intellij.lang.javascript.psi.impl.JSBinaryExpressionImpl"); 
38     private static final TokenSet BINARY_OPERATIONS = TokenSet.orSet(JSTokenTypes.OPERATIONS, JSTokenTypes.RELATIONAL_OPERATIONS); 
39    
40     public JSBinaryExpressionImpl(final ASTNode node) { 
41       super(node); 
42     } 
43    
44     public JSExpression getLOperand() { 
45       final ASTNode[] nodes = getNode().getChildren(JSElementTypes.EXPRESSIONS); 
46       LOG.assertTrue(nodes.length >= 1); 
47       return (JSExpression)nodes[0].getPsi(); 
48     } 
49    
50     public JSExpression getROperand() { 
51       final ASTNode[] nodes = getNode().getChildren(JSElementTypes.EXPRESSIONS); 
52       return nodes.length == 2 ? (JSExpression)nodes[1].getPsi() : null; 
53     } 
54    
55     public IElementType getOperationSign() { 
56       return getOperationASTNode().getElementType(); 
57     } 
58    
59     private ASTNode getOperationASTNode() { 
60       final ASTNode[] nodes = getNode().getChildren(BINARY_OPERATIONS); 
61       LOG.assertTrue(nodes.length == 1); 
62       return nodes[0]; 
63     } 
64    
65     public void accept(PsiElementVisitor visitor) { 
66       if (visitor instanceof JSElementVisitor) { 
67         ((JSElementVisitor)visitor).visitJSBinaryExpression(this); 
68       } 
69       else { 
70         visitor.visitElement(this); 
71       } 
72     } 
73    
74     public String toString() { 
75       return "JSBinaryExpression"; 
76     } 
77   } 
78