libjava/java/lang/reflect/Constructor.java

   1 // Constructor.java - Represents a constructor for a class.
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 package java.lang.reflect;
  12
  13 /**
  14  * @author Tom Tromey <tromey@cygnus.com>
  15  * @date December 12, 1998
  16  */
  17 /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
  18  * "The Java Language Specification", ISBN 0-201-63451-1
  19  * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
  20  * Status:  Incomplete: needs a private constructor, and
  21  *          newInstance() needs to be written.
  22  */
  23
  24 public final class Constructor extends AccessibleObject implements Member
  25 {
  26   public boolean equals (Object obj)
  27     {
  28       if (! (obj instanceof Constructor))
  29         return false;
  30       Constructor c = (Constructor) obj;
  31       return declaringClass == c.declaringClass && offset == c.offset;
  32     }
  33
  34   public Class getDeclaringClass ()
  35     {
  36       return declaringClass;
  37     }
  38
  39   public Class[] getExceptionTypes ()
  40     {
  41       if (exception_types == null)
  42         getType();
  43       return (Class[]) exception_types.clone();
  44     }
  45
  46   public native int getModifiers ();
  47
  48   public String getName ()
  49   {
  50     return declaringClass.getName();
  51   }
  52
  53   public Class[] getParameterTypes ()
  54     {
  55       if (parameter_types == null)
  56         getType ();
  57       return (Class[]) parameter_types.clone();
  58     }
  59
  60   public int hashCode ()
  61     {
  62       // FIXME.
  63       return getName().hashCode() + declaringClass.getName().hashCode();
  64     }
  65
  66   // Update cached values from method descriptor in class.
  67   private native void getType ();
  68
  69   public native Object newInstance (Object[] args)
  70     throws InstantiationException, IllegalAccessException,
  71            IllegalArgumentException, InvocationTargetException;
  72
  73   public String toString ()
  74     {
  75       if (parameter_types == null)
  76         getType ();
  77       StringBuffer b = new StringBuffer ();
  78       Modifier.toString(getModifiers(), b);
  79       b.append(" ");
  80       Method.appendClassName (b, declaringClass);
  81       b.append("(");
  82       for (int i = 0; i < parameter_types.length; ++i)
  83         {
  84           Method.appendClassName (b, parameter_types[i]);
  85           if (i < parameter_types.length - 1)
  86             b.append(",");
  87         }
  88       b.append(")");
  89       return b.toString();
  90     }
  91
  92   // Can't create these.
  93   private Constructor ()
  94     {
  95     }
  96
  97   // Declaring class.
  98   private Class declaringClass;
  99
 100   // Exception types.
 101   private Class[] exception_types;
 102   // Parameter types.
 103   private Class[] parameter_types;
 104
 105   // Offset in bytes from the start of declaringClass's methods array.
 106   private int offset;
 107 }