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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   * Java built-in primitive types.
31   *
32   * Instances of this class can be obtained as constants of {@link JCodeModel},
33   * such as {@link JCodeModel#BOOLEAN}.
34   */
35  public final class JPrimitiveType extends JType {
36  
37      private final String typeName;
38      private final JCodeModel owner;
39      /**
40       * Corresponding wrapper class.
41       * For example, this would be "java.lang.Short" for short.
42       */
43      private final JClass wrapperClass;
44  
45      JPrimitiveType(JCodeModel owner, String typeName, Class<?> wrapper ) {
46          this.owner = owner;
47          this.typeName = typeName;
48          this.wrapperClass = owner.ref(wrapper);
49      }
50  
51      public JCodeModel owner() { return owner; }
52  
53      public String fullName() {
54          return typeName;
55      }
56  
57      public String name() {
58          return fullName();
59      }
60  
61      public boolean isPrimitive() {
62          return true;
63      }
64  
65      private JClass arrayClass;
66      public JClass array() {
67          if(arrayClass==null)
68              arrayClass = new JArrayClass(owner,this);
69          return arrayClass;
70      }
71  
72      /**
73       * Obtains the wrapper class for this primitive type.
74       * For example, this method returns a reference to java.lang.Integer
75       * if this object represents int.
76       */
77      public JClass boxify() {
78          return wrapperClass;
79      }
80  
81      /**
82       * @deprecated calling this method from {@link JPrimitiveType}
83       * would be meaningless, since it's always guaranteed to
84       * return <tt>this</tt>.
85       */
86      public JType unboxify() {
87          return this;
88      }
89  
90      /**
91       * @deprecated
92       *      Use {@link #boxify()}.
93       */
94      public JClass getWrapperClass() {
95          return boxify();
96      }
97  
98      /**
99       * Wraps an expression of this type to the corresponding wrapper class.
100      * For example, if this class represents "float", this method will return
101      * the expression <code>new Float(x)</code> for the paramter x.
102      *
103      * REVISIT: it's not clear how this method works for VOID.
104      */
105     public JExpression wrap( JExpression exp ) {
106         return JExpr._new(boxify()).arg(exp);
107     }
108 
109     /**
110      * Do the opposite of the wrap method.
111      *
112      * REVISIT: it's not clear how this method works for VOID.
113      */
114     public JExpression unwrap( JExpression exp ) {
115         // it just so happens that the unwrap method is always
116         // things like "intValue" or "booleanValue".
117         return exp.invoke(typeName+"Value");
118     }
119 
120     public void generate(JFormatter f) {
121         f.p(typeName);
122     }
123 }