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Java > Open Source Codes > org > jruby > ast > OpElementAsgnNode


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
15  * Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
16  * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
17  * Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
18  *
19  * Alternatively, the contents of this file may be used under the terms of
20  * either of the GNU General Public License Version 2 or later (the "GPL"),
21  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
22  * in which case the provisions of the GPL or the LGPL are applicable instead
23  * of those above. If you wish to allow use of your version of this file only
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25  * use your version of this file under the terms of the CPL, indicate your
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28  * the provisions above, a recipient may use your version of this file under
29  * the terms of any one of the CPL, the GPL or the LGPL.
30  ***** END LICENSE BLOCK *****/
31 package org.jruby.ast;
32
33 import java.io.IOException JavaDoc;
34 import java.util.List JavaDoc;
35
36 import org.jruby.ast.visitor.NodeVisitor;
37 import org.jruby.evaluator.Instruction;
38 import org.jruby.lexer.yacc.ISourcePosition;
39
40 /** Represents an operator assignment to an element.
41  *
42  * This could be for example:
43  *
44  * <pre>
45  * a[4] += 5
46  * a[3] &&= true
47  * </pre>
48  *
49  * @author jpetersen
50  */
51 public class OpElementAsgnNode extends Node {
52     static final long serialVersionUID = 1509701560452403776L;
53
54     private final Node receiverNode;
55     private String JavaDoc operatorName;
56     private final Node argsNode;
57     private final Node valueNode;
58
59     public OpElementAsgnNode(ISourcePosition position, Node receiverNode, String JavaDoc operatorName, Node argsNode, Node valueNode) {
60         super(position, NodeTypes.OPELEMENTASGNNODE);
61         this.receiverNode = receiverNode;
62         this.operatorName = operatorName.intern();
63         this.argsNode = argsNode;
64         this.valueNode = valueNode;
65     }
66     
67     private void readObject(java.io.ObjectInputStream JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
68         in.defaultReadObject();
69         
70         // deserialized strings are not interned; intern it now
71 operatorName = operatorName.intern();
72     }
73
74     /**
75      * Accept for the visitor pattern.
76      * @param iVisitor the visitor
77      **/
78     public Instruction accept(NodeVisitor iVisitor) {
79         return iVisitor.visitOpElementAsgnNode(this);
80     }
81
82     /**
83      * Gets the argsNode.
84      * @return Returns a Node
85      */
86     public Node getArgsNode() {
87         return argsNode;
88     }
89
90     /**
91      * Gets the operatorName.
92      * @return Returns a String
93      */
94     public String JavaDoc getOperatorName() {
95         return operatorName;
96     }
97
98     /**
99      * Gets the receiverNode.
100      * @return Returns a Node
101      */
102     public Node getReceiverNode() {
103         return receiverNode;
104     }
105
106     /**
107      * Gets the valueNode.
108      * @return Returns a Node
109      */
110     public Node getValueNode() {
111         return valueNode;
112     }
113
114     public List JavaDoc childNodes() {
115         return Node.createList(receiverNode, argsNode, valueNode);
116     }
117 }
118
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