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 }