View Javadoc
1   /*
2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   package com.sun.org.apache.bcel.internal.generic;
6   
7   /* ====================================================================
8    * The Apache Software License, Version 1.1
9    *
10   * Copyright (c) 2001 The Apache Software Foundation.  All rights
11   * reserved.
12   *
13   * Redistribution and use in source and binary forms, with or without
14   * modification, are permitted provided that the following conditions
15   * are met:
16   *
17   * 1. Redistributions of source code must retain the above copyright
18   *    notice, this list of conditions and the following disclaimer.
19   *
20   * 2. Redistributions in binary form must reproduce the above copyright
21   *    notice, this list of conditions and the following disclaimer in
22   *    the documentation and/or other materials provided with the
23   *    distribution.
24   *
25   * 3. The end-user documentation included with the redistribution,
26   *    if any, must include the following acknowledgment:
27   *       "This product includes software developed by the
28   *        Apache Software Foundation (http://www.apache.org/)."
29   *    Alternately, this acknowledgment may appear in the software itself,
30   *    if and wherever such third-party acknowledgments normally appear.
31   *
32   * 4. The names "Apache" and "Apache Software Foundation" and
33   *    "Apache BCEL" must not be used to endorse or promote products
34   *    derived from this software without prior written permission. For
35   *    written permission, please contact apache@apache.org.
36   *
37   * 5. Products derived from this software may not be called "Apache",
38   *    "Apache BCEL", nor may "Apache" appear in their name, without
39   *    prior written permission of the Apache Software Foundation.
40   *
41   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52   * SUCH DAMAGE.
53   * ====================================================================
54   *
55   * This software consists of voluntary contributions made by many
56   * individuals on behalf of the Apache Software Foundation.  For more
57   * information on the Apache Software Foundation, please see
58   * <http://www.apache.org/>.
59   */
60  import com.sun.org.apache.bcel.internal.Constants;
61  
62  /**
63   * Denotes basic type such as int.
64   *
65   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
66   */
67  public final class BasicType extends Type {
68    /**
69     * Constructor for basic types such as int, long, `void'
70     *
71     * @param type one of T_INT, T_BOOLEAN, ..., T_VOID
72     * @see com.sun.org.apache.bcel.internal.Constants
73     */
74    BasicType(byte type) {
75      super(type, Constants.SHORT_TYPE_NAMES[type]);
76  
77      if((type < Constants.T_BOOLEAN) || (type > Constants.T_VOID))
78        throw new ClassGenException("Invalid type: " + type);
79    }
80  
81    public static final BasicType getType(byte type) {
82      switch(type) {
83      case Constants.T_VOID:    return VOID;
84      case Constants.T_BOOLEAN: return BOOLEAN;
85      case Constants.T_BYTE:    return BYTE;
86      case Constants.T_SHORT:   return SHORT;
87      case Constants.T_CHAR:    return CHAR;
88      case Constants.T_INT:     return INT;
89      case Constants.T_LONG:    return LONG;
90      case Constants.T_DOUBLE:  return DOUBLE;
91      case Constants.T_FLOAT:   return FLOAT;
92  
93      default:
94        throw new ClassGenException("Invalid type: " + type);
95      }
96    }
97  
98    /** @return true if both type objects refer to the same type
99     */
100   @Override
101   public boolean equals(Object type) {
102     return (type instanceof BasicType)?
103       ((BasicType)type).type == this.type : false;
104   }
105 
106   @Override
107   public int hashCode() {
108       return type;
109   }
110 }