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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      */
JFieldRef(JExpression object, String name)65     JFieldRef(JExpression object, String name) {
66         this(object, name, false);
67     }
68 
JFieldRef(JExpression object, JVar v)69     JFieldRef(JExpression object, JVar v) {
70         this(object, v, false);
71     }
72 
73     /**
74      * Static field reference.
75      */
JFieldRef(JType type, String name)76     JFieldRef(JType type, String name) {
77         this(type, name, false);
78     }
79 
JFieldRef(JType type, JVar v)80     JFieldRef(JType type, JVar v) {
81         this(type, v, false);
82     }
83 
JFieldRef(JGenerable object, String name, boolean explicitThis)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 
JFieldRef(JGenerable object, JVar var, boolean explicitThis)92     JFieldRef(JGenerable object, JVar var, boolean explicitThis) {
93         this.explicitThis = explicitThis;
94         this.object = object;
95         this.var = var;
96     }
97 
generate(JFormatter f)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 
assign(JExpression rhs)113     public JExpression assign(JExpression rhs) {
114         return JExpr.assign(this, rhs);
115     }
assignPlus(JExpression rhs)116     public JExpression assignPlus(JExpression rhs) {
117         return JExpr.assignPlus(this, rhs);
118     }
119 }
120