libjava/java/lang/reflect/natField.cc

   1 // natField.cc - Implementation of java.lang.reflect.Field native methods.
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2006  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 #include <config.h>
  12
  13 #include <stdlib.h>
  14
  15 #include <jvm.h>
  16 #include <java-stack.h>
  17 #include <java/lang/reflect/Field.h>
  18 #include <java/lang/reflect/Modifier.h>
  19 #include <java/lang/ArrayIndexOutOfBoundsException.h>
  20 #include <java/lang/IllegalArgumentException.h>
  21 #include <java/lang/IllegalAccessException.h>
  22 #include <java/lang/NullPointerException.h>
  23 #include <java/lang/Byte.h>
  24 #include <java/lang/Short.h>
  25 #include <java/lang/Integer.h>
  26 #include <java/lang/Long.h>
  27 #include <java/lang/Float.h>
  28 #include <java/lang/Double.h>
  29 #include <java/lang/Boolean.h>
  30 #include <java/lang/Character.h>
  31
  32 jint
  33 java::lang::reflect::Field::getModifiersInternal ()
  34 {
  35   return _Jv_FromReflectedField (this)->flags;
  36 }
  37
  38 jstring
  39 java::lang::reflect::Field::getName ()
  40 {
  41   if (name == NULL)
  42     name = _Jv_NewStringUtf8Const (_Jv_FromReflectedField (this)->name);
  43   return name;
  44 }
  45
  46 jclass
  47 java::lang::reflect::Field::getType ()
  48 {
  49   if (type == NULL)
  50     {
  51       jfieldID fld = _Jv_FromReflectedField (this);
  52       JvSynchronize sync (declaringClass);
  53       _Jv_Linker::resolve_field (fld, declaringClass->getClassLoaderInternal ());
  54       type = fld->type;
  55     }
  56   return type;
  57 }
  58
  59 static void*
  60 getAddr (java::lang::reflect::Field* field, jclass caller, jobject obj,
  61          jboolean checkFinal)
  62 {
  63   // FIXME: we know CALLER is NULL here.  At one point we planned to
  64   // have the compiler insert the caller as a hidden argument in some
  65   // calls.  However, we never implemented that, so we have to find
  66   // the caller by hand instead.
  67
  68   using namespace java::lang::reflect;
  69
  70   jfieldID fld = _Jv_FromReflectedField (field);
  71   _Jv_ushort flags = fld->getModifiers();
  72
  73   // Setting a final field is usually not allowed.
  74   if (checkFinal
  75       && (field->getModifiers() & java::lang::reflect::Modifier::FINAL))
  76     throw new java::lang::IllegalAccessException(JvNewStringUTF
  77       ("Field is final"));
  78
  79   // Check accessibility, if required.
  80   if (! (Modifier::isPublic (flags) || field->isAccessible()))
  81     {
  82       caller = _Jv_StackTrace::GetCallingClass (&Field::class$);
  83       if (! _Jv_CheckAccess (caller, field->getDeclaringClass(), flags))
  84         throw new java::lang::IllegalAccessException;
  85     }
  86
  87   if (flags & Modifier::STATIC)
  88     {
  89       jclass fldClass = field->getDeclaringClass ();
  90       JvInitClass(fldClass);
  91       return fld->u.addr;
  92     }
  93   else
  94     {
  95       if (obj == NULL)
  96         throw new java::lang::NullPointerException;
  97       if (! _Jv_IsInstanceOf (obj, field->getDeclaringClass()))
  98         throw new java::lang::IllegalArgumentException;
  99       return (void*) ((char*) obj + fld->getOffset ());
 100     }
 101 }
 102
 103 static jboolean
 104 getBoolean (jclass cls, void* addr)
 105 {
 106   if (cls == JvPrimClass (boolean))
 107     return * (jboolean *) addr;
 108   throw new java::lang::IllegalArgumentException;
 109 }
 110
 111 static jchar
 112 getChar (jclass cls, void* addr)
 113 {
 114   if (cls == JvPrimClass (char))
 115     return * (jchar *) addr;
 116   throw new java::lang::IllegalArgumentException;
 117 }
 118
 119 static jbyte
 120 getByte (jclass cls, void* addr)
 121 {
 122   if (cls == JvPrimClass (byte))
 123     return * (jbyte *) addr;
 124   throw new java::lang::IllegalArgumentException;
 125 }
 126
 127 static jshort
 128 getShort (jclass cls, void* addr)
 129 {
 130   if (cls == JvPrimClass (short))
 131     return * (jshort *) addr;
 132   if (cls == JvPrimClass (byte))
 133     return * (jbyte *) addr;
 134   throw new java::lang::IllegalArgumentException;
 135 }
 136
 137 static jint
 138 getInt (jclass cls, void* addr)
 139 {
 140   if (cls == JvPrimClass (int))
 141     return * (jint *) addr;
 142   if (cls == JvPrimClass (short))
 143     return * (jshort *) addr;
 144   if (cls == JvPrimClass (char))
 145     return * (jchar *) addr;
 146   if (cls == JvPrimClass (byte))
 147     return * (jbyte *) addr;
 148   throw new java::lang::IllegalArgumentException;
 149 }
 150
 151 static jlong
 152 getLong (jclass cls, void* addr)
 153 {
 154   if (cls == JvPrimClass (long))
 155     return * (jlong *) addr;
 156   return ::getInt(cls, addr);
 157 }
 158
 159 static jfloat
 160 getFloat (jclass cls, void* addr)
 161 {
 162   if (cls == JvPrimClass (float))
 163     return * (jfloat *) addr;
 164   if (cls == JvPrimClass (long))
 165     return * (jlong *) addr;
 166   return ::getInt(cls, addr);
 167 }
 168
 169 static jdouble
 170 getDouble (jclass cls, void* addr)
 171 {
 172   if (cls == JvPrimClass (double))
 173     return * (jdouble *) addr;
 174   if (cls == JvPrimClass (float))
 175     return * (jfloat *) addr;
 176   if (cls == JvPrimClass (long))
 177     return * (jlong *) addr;
 178   return ::getInt(cls, addr);
 179 }
 180
 181 jboolean
 182 java::lang::reflect::Field::getBoolean (jclass caller, jobject obj)
 183 {
 184   return ::getBoolean (this->getType(), getAddr (this, caller, obj, false));
 185 }
 186
 187 jchar
 188 java::lang::reflect::Field::getChar (jclass caller, jobject obj)
 189 {
 190   return ::getChar (this->getType(), getAddr (this, caller, obj, false));
 191 }
 192
 193 jbyte
 194 java::lang::reflect::Field::getByte (jclass caller, jobject obj)
 195 {
 196   return ::getByte (this->getType(), getAddr (this, caller, obj, false));
 197 }
 198
 199 jshort
 200 java::lang::reflect::Field::getShort (jclass caller, jobject obj)
 201 {
 202   return ::getShort (this->getType(), getAddr (this, caller, obj, false));
 203 }
 204
 205 jint
 206 java::lang::reflect::Field::getInt (jclass caller, jobject obj)
 207 {
 208   return ::getInt (this->getType(), getAddr (this, caller, obj, false));
 209 }
 210
 211 jlong
 212 java::lang::reflect::Field::getLong (jclass caller, jobject obj)
 213 {
 214   return ::getLong (this->getType(), getAddr (this, caller, obj, false));
 215 }
 216
 217 jfloat
 218 java::lang::reflect::Field::getFloat (jclass caller, jobject obj)
 219 {
 220   return ::getFloat (this->getType(), getAddr (this, caller, obj, false));
 221 }
 222
 223 jdouble
 224 java::lang::reflect::Field::getDouble (jclass caller, jobject obj)
 225 {
 226   return ::getDouble (this->getType(), getAddr (this, caller, obj, false));
 227 }
 228
 229 jobject
 230 java::lang::reflect::Field::get (jclass caller, jobject obj)
 231 {
 232   jclass type = this->getType();
 233   void* addr = getAddr (this, caller, obj, false);
 234   if (! type->isPrimitive ())
 235     return * (jobject*) addr;
 236   if (type == JvPrimClass (double))
 237     return new java::lang::Double (* (jdouble*) addr);
 238   if (type == JvPrimClass (float))
 239     return new java::lang::Float (* (jfloat*) addr);
 240   if (type == JvPrimClass (long))
 241     return new java::lang::Long (* (jlong*) addr);
 242   if (type == JvPrimClass (int))
 243     return new java::lang::Integer (* (jint*) addr);
 244   if (type == JvPrimClass (short))
 245     return new java::lang::Short (* (jshort*) addr);
 246   if (type == JvPrimClass (byte))
 247     return new java::lang::Byte (* (jbyte*) addr);
 248   if (type == JvPrimClass (char))
 249     return new java::lang::Character (* (jchar*) addr);
 250   if (type == JvPrimClass (boolean))
 251     {
 252       _Jv_InitClass (&java::lang::Boolean::class$);
 253       if (* (jboolean*) addr)
 254         return java::lang::Boolean::TRUE;
 255       else
 256         return java::lang::Boolean::FALSE;
 257     }
 258   throw new java::lang::IllegalArgumentException;
 259 }
 260
 261 static void
 262 setBoolean (jclass type, void *addr, jboolean value)
 263 {
 264   if (type == JvPrimClass (boolean))
 265     * (jboolean *) addr = value;
 266   else
 267     throw new java::lang::IllegalArgumentException;
 268 }
 269
 270 static void
 271 setChar (jclass type, void *addr, jchar value)
 272 {
 273   if (type == JvPrimClass (char))
 274     * (jchar *) addr = value;
 275   else if (type == JvPrimClass (int))
 276     * (jint *) addr = value;
 277   else if (type == JvPrimClass (long))
 278     * (jlong *) addr = value;
 279   else if (type == JvPrimClass (float))
 280     * (jfloat *) addr = value;
 281   else if (type == JvPrimClass (double))
 282     * (jdouble *) addr = value;
 283   else
 284     throw new java::lang::IllegalArgumentException;
 285 }
 286
 287 static void
 288 setByte (jclass type, void *addr, jbyte value)
 289 {
 290   if (type == JvPrimClass (byte))
 291     * (jbyte *) addr = value;
 292   else if (type == JvPrimClass (short))
 293     * (jshort *) addr = value;
 294   else if (type == JvPrimClass (int))
 295     * (jint *) addr = value;
 296   else if (type == JvPrimClass (long))
 297     * (jlong *) addr = value;
 298   else if (type == JvPrimClass (float))
 299     * (jfloat *) addr = value;
 300   else if (type == JvPrimClass (double))
 301     * (jdouble *) addr = value;
 302   else
 303     throw new java::lang::IllegalArgumentException;
 304 }
 305
 306 static void
 307 setShort (jclass type, void *addr, jshort value)
 308 {
 309   if (type == JvPrimClass (short))
 310     * (jshort *) addr = value;
 311   else if (type == JvPrimClass (int))
 312     * (jint *) addr = value;
 313   else if (type == JvPrimClass (long))
 314     * (jlong *) addr = value;
 315   else if (type == JvPrimClass (float))
 316     * (jfloat *) addr = value;
 317   else if (type == JvPrimClass (double))
 318     * (jdouble *) addr = value;
 319   else
 320     throw new java::lang::IllegalArgumentException;
 321 }
 322
 323 static void
 324 setInt (jclass type, void *addr, jint value)
 325 {
 326   if (type == JvPrimClass (int))
 327     * (jint *) addr = value;
 328   else if (type == JvPrimClass (long))
 329     * (jlong *) addr = value;
 330   else if (type == JvPrimClass (float))
 331     * (jfloat *) addr = value;
 332   else if (type == JvPrimClass (double))
 333     * (jdouble *) addr = value;
 334   else
 335     throw new java::lang::IllegalArgumentException;
 336 }
 337
 338 static void
 339 setLong (jclass type, void *addr, jlong value)
 340 {
 341   if (type == JvPrimClass (long))
 342     * (jlong *) addr = value;
 343   else if (type == JvPrimClass (float))
 344     * (jfloat *) addr = value;
 345   else if (type == JvPrimClass (double))
 346     * (jdouble *) addr = value;
 347   else
 348     throw new java::lang::IllegalArgumentException;
 349 }
 350
 351 static void
 352 setFloat (jclass type, void *addr, jfloat value)
 353 {
 354   if (type == JvPrimClass (float))
 355     * (jfloat *) addr = value;
 356   else if (type == JvPrimClass (double))
 357     * (jdouble *) addr = value;
 358   else
 359     throw new java::lang::IllegalArgumentException;
 360 }
 361
 362 static void
 363 setDouble (jclass type, void *addr, jdouble value)
 364 {
 365   if (type == JvPrimClass (double))
 366     * (jdouble *) addr = value;
 367   else
 368     throw new java::lang::IllegalArgumentException;
 369 }
 370
 371 void
 372 java::lang::reflect::Field::setBoolean (jclass caller, jobject obj, jboolean b,
 373                                         jboolean checkFinal)
 374 {
 375   ::setBoolean (this->getType(), getAddr (this, caller, obj, checkFinal), b);
 376 }
 377
 378 void
 379 java::lang::reflect::Field::setChar (jclass caller, jobject obj, jchar c,
 380                                      jboolean checkFinal)
 381 {
 382   ::setChar (this->getType(), getAddr (this, caller, obj, checkFinal), c);
 383 }
 384
 385 void
 386 java::lang::reflect::Field::setByte (jclass caller, jobject obj, jbyte b,
 387                                      jboolean checkFinal)
 388 {
 389   ::setByte (this->getType(), getAddr (this, caller, obj, checkFinal), b);
 390 }
 391
 392 void
 393 java::lang::reflect::Field::setShort (jclass caller, jobject obj, jshort s,
 394                                       jboolean checkFinal)
 395 {
 396   ::setShort (this->getType(), getAddr (this, caller, obj, checkFinal), s);
 397 }
 398
 399 void
 400 java::lang::reflect::Field::setInt (jclass caller, jobject obj, jint i,
 401                                     jboolean checkFinal)
 402 {
 403   ::setInt (this->getType(), getAddr (this, caller, obj, checkFinal), i);
 404 }
 405
 406 void
 407 java::lang::reflect::Field::setLong (jclass caller, jobject obj, jlong l,
 408                                      jboolean checkFinal)
 409 {
 410   ::setLong (this->getType(), getAddr (this, caller, obj, checkFinal), l);
 411 }
 412
 413 void
 414 java::lang::reflect::Field::setFloat (jclass caller, jobject obj, jfloat f,
 415                                       jboolean checkFinal)
 416 {
 417   ::setFloat (this->getType(), getAddr (this, caller, obj, checkFinal), f);
 418 }
 419
 420 void
 421 java::lang::reflect::Field::setDouble (jclass caller, jobject obj, jdouble d,
 422                                        jboolean checkFinal)
 423 {
 424   ::setDouble (this->getType(), getAddr (this, caller, obj, checkFinal), d);
 425 }
 426
 427 void
 428 java::lang::reflect::Field::set (jclass caller, jobject object, jobject value,
 429                                  jclass type, jboolean checkFinal)
 430 {
 431   void* addr = getAddr (this, caller, object, checkFinal);
 432   if (value != NULL && ! _Jv_IsInstanceOf (value, type))
 433     throw new java::lang::IllegalArgumentException;
 434   * (jobject*) addr = value;
 435 }