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.JSElementVisitor; 
22   import com.intellij.lang.javascript.psi.JSExpression; 
23   import com.intellij.lang.javascript.psi.JSPrefixExpression; 
24   import com.intellij.psi.PsiElementVisitor; 
25   import com.intellij.psi.tree.IElementType; 
26    
27   /** 
28    * Created by IntelliJ IDEA. 
29    * User: max 
30    * Date: Jan 30, 2005 
31    * Time: 11:52:13 PM 
32    * To change this template use File | Settings | File Templates. 
33    */ 
34   public class JSPrefixExpressionImpl extends JSElementImpl implements JSPrefixExpression { 
35     public JSPrefixExpressionImpl(final ASTNode node) { 
36       super(node); 
37     } 
38    
39     public JSExpression getExpression() { 
40       final ASTNode[] nodes = getNode().getChildren(JSElementTypes.EXPRESSIONS); 
41       return (JSExpression)(nodes.length == 1 ? nodes[0].getPsi() : null); 
42     } 
43    
44     public IElementType getOperationSign() { 
45       final ASTNode[] nodes = getNode().getChildren(JSTokenTypes.OPERATIONS); 
46       return nodes.length == 1 ? nodes[0].getElementType() : null; 
47     } 
48    
49     public void accept(PsiElementVisitor visitor) { 
50       if (visitor instanceof JSElementVisitor) { 
51         ((JSElementVisitor)visitor).visitJSPrefixExpression(this); 
52       } 
53       else { 
54         visitor.visitElement(this); 
55       } 
56     } 
57    
58     public String toString() { 
59       return "JSPrefixExpression"; 
60     } 
61   } 
62