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1   /*
2    * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package com.sun.codemodel.internal;
27  
28  
29  /**
30   * Field Reference
31   */
32  
33  public class JFieldRef extends JExpressionImpl implements JAssignmentTarget {
34      /**
35       * Object expression upon which this field will be accessed, or
36       * null for the implicit 'this'.
37       */
38      private JGenerable object;
39  
40      /**
41       * Name of the field to be accessed. Either this or {@link #var} is set.
42       */
43      private String name;
44  
45      /**
46       * Variable to be accessed.
47       */
48      private JVar var;
49  
50      /**
51       * Indicates if an explicit this should be generated
52       */
53      private boolean explicitThis;
54  
55      /**
56       * Field reference constructor given an object expression and field name
57       *
58       * @param object
59       *        JExpression for the object upon which
60       *        the named field will be accessed,
61       *
62       * @param name
63       *        Name of field to access
64       */
65      JFieldRef(JExpression object, String name) {
66          this(object, name, false);
67      }
68  
69      JFieldRef(JExpression object, JVar v) {
70          this(object, v, false);
71      }
72  
73      /**
74       * Static field reference.
75       */
76      JFieldRef(JType type, String name) {
77          this(type, name, false);
78      }
79  
80      JFieldRef(JType type, JVar v) {
81          this(type, v, false);
82      }
83  
84      JFieldRef(JGenerable object, String name, boolean explicitThis) {
85          this.explicitThis = explicitThis;
86          this.object = object;
87          if (name.indexOf('.') >= 0)
88              throw new IllegalArgumentException("Field name contains '.': " + name);
89          this.name = name;
90      }
91  
92      JFieldRef(JGenerable object, JVar var, boolean explicitThis) {
93          this.explicitThis = explicitThis;
94          this.object = object;
95          this.var = var;
96      }
97  
98      public void generate(JFormatter f) {
99          String name = this.name;
100         if(name==null)  name=var.name();
101 
102         if (object != null) {
103             f.g(object).p('.').p(name);
104         } else {
105             if (explicitThis) {
106                 f.p("this.").p(name);
107             } else {
108                 f.id(name);
109             }
110         }
111     }
112 
113     public JExpression assign(JExpression rhs) {
114         return JExpr.assign(this, rhs);
115     }
116     public JExpression assignPlus(JExpression rhs) {
117         return JExpr.assignPlus(this, rhs);
118     }
119 }