Showing the changes to java/pkg/com/sun/jdi/ObjectReference.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,444 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2006, 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.jdi; | ||
| 27 | |||
| 28 | import java.util.List; | ||
| 29 | import java.util.Map; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * An object that currently exists in the target VM. An ObjectReference | ||
| 33 | * mirrors only the object itself and is not specific to any | ||
| 34 | * {@link Field} or {@link LocalVariable} to which it is currently | ||
| 35 | * assigned. An ObjectReference can | ||
| 36 | * have 0 or more references from field(s) and/or variable(s). | ||
| 37 | * <p> | ||
| 38 | * Any method on <code>ObjectReference</code> which directly or | ||
| 39 | * indirectly takes <code>ObjectReference</code> as an parameter may throw | ||
| 40 | * {@link com.sun.jdi.VMDisconnectedException} if the target VM is | ||
| 41 | * disconnected and the {@link com.sun.jdi.event.VMDisconnectEvent} has been or is | ||
| 42 | * available to be read from the {@link com.sun.jdi.event.EventQueue}. | ||
| 43 | * <p> | ||
| 44 | * Any method on <code>ObjectReference</code> which directly or | ||
| 45 | * indirectly takes <code>ObjectReference</code> as an parameter may throw | ||
| 46 | * {@link com.sun.jdi.VMOutOfMemoryException} if the target VM has run out of memory. | ||
| 47 | * <p> | ||
| 48 | * Any method on <code>ObjectReference</code> or which directly or indirectly takes | ||
| 49 | * <code>ObjectReference</code> as parameter may throw | ||
| 50 | * {@link com.sun.jdi.ObjectCollectedException} if the mirrored object has been | ||
| 51 | * garbage collected. | ||
| 52 | * | ||
| 53 | * @author Robert Field | ||
| 54 | * @author Gordon Hirsch | ||
| 55 | * @author James McIlree | ||
| 56 | * @since 1.3 | ||
| 57 | */ | ||
| 58 | public interface ObjectReference extends Value | ||
| 59 | { | ||
| 60 | /** | ||
| 61 | * Gets the {@link ReferenceType} that mirrors the type | ||
| 62 | * of this object. The type may be a subclass or implementor of the | ||
| 63 | * declared type of any field or variable which currently holds it. | ||
| 64 | * For example, right after the following statement. | ||
| 65 | * <p> | ||
| 66 | * <code>Object obj = new String("Hello, world!");</code> | ||
| 67 | * <p> | ||
| 68 | * The ReferenceType of obj will mirror java.lang.String and not | ||
| 69 | * java.lang.Object. | ||
| 70 | * <p> | ||
| 71 | * The type of an object never changes, so this method will | ||
| 72 | * always return the same ReferenceType over the lifetime of the | ||
| 73 | * mirrored object. | ||
| 74 | * <p> | ||
| 75 | * The returned ReferenceType will be a {@link ClassType} or | ||
| 76 | * {@link ArrayType} and never an {@link InterfaceType}. | ||
| 77 | * | ||
| 78 | * @return the {@link ReferenceType} for this object. | ||
| 79 | */ | ||
| 80 | ReferenceType referenceType(); | ||
| 81 | |||
| 82 | /** | ||
| 83 | * Gets the value of a given instance or static field in this object. | ||
| 84 | * The Field must be valid for this ObjectReference; | ||
| 85 | * that is, it must be from | ||
| 86 | * the mirrored object's class or a superclass of that class. | ||
| 87 | * | ||
| 88 | * @param sig the field containing the requested value | ||
| 89 | * @return the {@link Value} of the instance field. | ||
| 90 | * @throws java.lang.IllegalArgumentException if the field is not valid for | ||
| 91 | * this object's class. | ||
| 92 | */ | ||
| 93 | Value getValue(Field sig); | ||
| 94 | |||
| 95 | /** | ||
| 96 | * Gets the value of multiple instance and/or static fields in this object. | ||
| 97 | * The Fields must be valid for this ObjectReference; | ||
| 98 | * that is, they must be from | ||
| 99 | * the mirrored object's class or a superclass of that class. | ||
| 100 | * | ||
| 101 | * @param fields a list of {@link Field} objects containing the | ||
| 102 | * requested values. | ||
| 103 | * @return a Map of the requested {@link Field} objects with | ||
| 104 | * their {@link Value}. | ||
| 105 | * @throws java.lang.IllegalArgumentException if any field is not valid for | ||
| 106 | * this object's class. | ||
| 107 | */ | ||
| 108 | Map<Field,Value> getValues(List<? extends Field> fields); | ||
| 109 | |||
| 110 | /** | ||
| 111 | * Sets the value of a given instance or static field in this object. | ||
| 112 | * The {@link Field} must be valid for this ObjectReference; that is, | ||
| 113 | * it must be from the mirrored object's class or a superclass of that class. | ||
| 114 | * If static, the field must not be final. | ||
| 115 | * <p> | ||
| 116 | * Object values must be assignment compatible with the field type | ||
| 117 | * (This implies that the field type must be loaded through the | ||
| 118 | * enclosing class's class loader). Primitive values must be | ||
| 119 | * either assignment compatible with the field type or must be | ||
| 120 | * convertible to the field type without loss of information. | ||
| 121 | * See section 5.2 of | ||
| 122 | * <cite>The Java™ Language Specification</cite> | ||
| 123 | * for more information on assignment | ||
| 124 | * compatibility. | ||
| 125 | * | ||
| 126 | * @param field the field containing the requested value | ||
| 127 | * @param value the new value to assign | ||
| 128 | * @throws java.lang.IllegalArgumentException if the field is not valid for | ||
| 129 | * this object's class. | ||
| 130 | * @throws InvalidTypeException if the value's type does not match | ||
| 131 | * the field's type. | ||
| 132 | * @throws ClassNotLoadedException if 'value' is not null, and the field | ||
| 133 | * type has not yet been loaded through the appropriate class loader. | ||
| 134 | * @throws VMCannotBeModifiedException if the VirtualMachine is read-only - see {@link VirtualMachine#canBeModified()}. | ||
| 135 | */ | ||
| 136 | void setValue(Field field, Value value) | ||
| 137 | throws InvalidTypeException, ClassNotLoadedException; | ||
| 138 | |||
| 139 | /** Perform method invocation with only the invoking thread resumed */ | ||
| 140 | static final int INVOKE_SINGLE_THREADED = 0x1; | ||
| 141 | /** Perform non-virtual method invocation */ | ||
| 142 | static final int INVOKE_NONVIRTUAL = 0x2; | ||
| 143 | |||
| 144 | /** | ||
| 145 | * Invokes the specified {@link Method} on this object in the | ||
| 146 | * target VM. The | ||
| 147 | * specified method can be defined in this object's class, | ||
| 148 | * in a superclass of this object's class, or in an interface | ||
| 149 | * implemented by this object. The method may be a static method | ||
| 150 | * or an instance method, but not a static initializer or constructor. | ||
| 151 | * Use {@link ClassType#newInstance} to create a new object and | ||
| 152 | * run its constructor. | ||
| 153 | * <p> | ||
| 154 | * The method invocation will occur in the specified thread. | ||
| 155 | * Method invocation can occur only if the specified thread | ||
| 156 | * has been suspended by an event which occurred in that thread. | ||
| 157 | * Method invocation is not supported | ||
| 158 | * when the target VM has been suspended through | ||
| 159 | * {@link VirtualMachine#suspend} or when the specified thread | ||
| 160 | * is suspended through {@link ThreadReference#suspend}. | ||
| 161 | * <p> | ||
| 162 | * The specified method is invoked with the arguments in the specified | ||
| 163 | * argument list. The method invocation is synchronous; this method | ||
| 164 | * does not return until the invoked method returns in the target VM. | ||
| 165 | * If the invoked method throws an exception, this method | ||
| 166 | * will throw an {@link InvocationException} which contains | ||
| 167 | * a mirror to the exception object thrown. | ||
| 168 | * <p> | ||
| 169 | * Object arguments must be assignment compatible with the argument type | ||
| 170 | * (This implies that the argument type must be loaded through the | ||
| 171 | * enclosing class's class loader). Primitive arguments must be | ||
| 172 | * either assignment compatible with the argument type or must be | ||
| 173 | * convertible to the argument type without loss of information. | ||
| 174 | * If the method being called accepts a variable number of arguments, | ||
| 175 | * then the last argument type is an array of some component type. | ||
| 176 | * The argument in the matching position can be omitted, or can be null, | ||
| 177 | * an array of the same component type, or an argument of the | ||
| 178 | * component type followed by any number of other arguments of the same | ||
| 179 | * type. If the argument is omitted, then a 0 length array of the | ||
| 180 | * component type is passed. The component type can be a primitive type. | ||
| 181 | * Autoboxing is not supported. | ||
| 182 | * | ||
| 183 | * See section 5.2 of | ||
| 184 | * <cite>The Java™ Language Specification</cite> | ||
| 185 | * for more information on assignment compatibility. | ||
| 186 | * <p> | ||
| 187 | * By default, the method is invoked using dynamic lookup as | ||
| 188 | * documented in section 15.12.4.4 of | ||
| 189 | * <cite>The Java™ Language Specification</cite> | ||
| 190 | * in particular, overriding based on the runtime type of the object | ||
| 191 | * mirrored by this {@link ObjectReference} will occur. This | ||
| 192 | * behavior can be changed by specifying the | ||
| 193 | * {@link #INVOKE_NONVIRTUAL} bit flag in the <code>options</code> | ||
| 194 | * argument. If this flag is set, the specified method is invoked | ||
| 195 | * whether or not it is overridden for this object's runtime type. | ||
| 196 | * The method, in this case, must not belong to an interface and | ||
| 197 | * must not be abstract. This option is useful for performing method | ||
| 198 | * invocations like those done with the <code>super</code> keyword in | ||
| 199 | * the Java programming language. | ||
| 200 | * <p> | ||
| 201 | * By default, all threads in the target VM are resumed while | ||
| 202 | * the method is being invoked if they were previously | ||
| 203 | * suspended by an event or by {@link VirtualMachine#suspend} or | ||
| 204 | * {@link ThreadReference#suspend}. This is done to prevent the deadlocks | ||
| 205 | * that will occur if any of the threads own monitors | ||
| 206 | * that will be needed by the invoked method. | ||
| 207 | * Note, however, that this implicit resume acts exactly like | ||
| 208 | * {@link ThreadReference#resume}, so if the thread's suspend | ||
| 209 | * count is greater than 1, it will remain in a suspended state | ||
| 210 | * during the invocation and thus a deadlock could still occur. | ||
| 211 | * By default, when the invocation completes, | ||
| 212 | * all threads in the target VM are suspended, regardless their state | ||
| 213 | * before the invocation. | ||
| 214 | * It is possible that | ||
| 215 | * breakpoints or other events might occur during the invocation. | ||
| 216 | * This can cause deadlocks as described above. It can also cause a deadlock | ||
| 217 | * if invokeMethod is called from the client's event handler thread. In this | ||
| 218 | * case, this thread will be waiting for the invokeMethod to complete and | ||
| 219 | * won't read the EventSet that comes in for the new event. If this | ||
| 220 | * new EventSet is SUSPEND_ALL, then a deadlock will occur because no | ||
| 221 | * one will resume the EventSet. To avoid this, all EventRequests should | ||
| 222 | * be disabled before doing the invokeMethod, or the invokeMethod should | ||
| 223 | * not be done from the client's event handler thread. | ||
| 224 | * <p> | ||
| 225 | * The resumption of other threads during the invocation can be prevented | ||
| 226 | * by specifying the {@link #INVOKE_SINGLE_THREADED} | ||
| 227 | * bit flag in the <code>options</code> argument; however, | ||
| 228 | * there is no protection against or recovery from the deadlocks | ||
| 229 | * described above, so this option should be used with great caution. | ||
| 230 | * Only the specified thread will be resumed (as described for all | ||
| 231 | * threads above). Upon completion of a single threaded invoke, the invoking thread | ||
| 232 | * will be suspended once again. Note that any threads started during | ||
| 233 | * the single threaded invocation will not be suspended when the | ||
| 234 | * invocation completes. | ||
| 235 | * <p> | ||
| 236 | * If the target VM is disconnected during the invoke (for example, through | ||
| 237 | * {@link VirtualMachine#dispose}) the method invocation continues. | ||
| 238 | * | ||
| 239 | * @param thread the thread in which to invoke. | ||
| 240 | * @param method the {@link Method} to invoke. | ||
| 241 | * @param arguments the list of {@link Value} arguments bound to the | ||
| 242 | * invoked method. Values from the list are assigned to arguments | ||
| 243 | * in the order they appear in the method signature. | ||
| 244 | * @param options the integer bit flag options. | ||
| 245 | * @return a {@link Value} mirror of the invoked method's return value. | ||
| 246 | * @throws java.lang.IllegalArgumentException if the method is not | ||
| 247 | * a member of this object's class, if the size of the argument list | ||
| 248 | * does not match the number of declared arguemnts for the method, | ||
| 249 | * if the method is a constructor or static intializer, or | ||
| 250 | * if {@link #INVOKE_NONVIRTUAL} is specified and the method is | ||
| 251 | * either abstract or an interface member. | ||
| 252 | * @throws {@link InvalidTypeException} if any argument in the | ||
| 253 | * argument list is not assignable to the corresponding method argument | ||
| 254 | * type. | ||
| 255 | * @throws ClassNotLoadedException if any argument type has not yet been loaded | ||
| 256 | * through the appropriate class loader. | ||
| 257 | * @throws IncompatibleThreadStateException if the specified thread has not | ||
| 258 | * been suspended by an event. | ||
| 259 | * @throws InvocationException if the method invocation resulted in | ||
| 260 | * an exception in the target VM. | ||
| 261 | * @throws InvalidTypeException If the arguments do not meet this requirement -- | ||
| 262 | * Object arguments must be assignment compatible with the argument | ||
| 263 | * type. This implies that the argument type must be | ||
| 264 | * loaded through the enclosing class's class loader. | ||
| 265 | * Primitive arguments must be either assignment compatible with the | ||
| 266 | * argument type or must be convertible to the argument type without loss | ||
| 267 | * of information. See JLS section 5.2 for more information on assignment | ||
| 268 | * compatibility. | ||
| 269 | * @throws VMCannotBeModifiedException if the VirtualMachine is read-only - see {@link VirtualMachine#canBeModified()}. | ||
| 270 | */ | ||
| 271 | Value invokeMethod(ThreadReference thread, Method method, | ||
| 272 | List<? extends Value> arguments, int options) | ||
| 273 | throws InvalidTypeException, | ||
| 274 | ClassNotLoadedException, | ||
| 275 | IncompatibleThreadStateException, | ||
| 276 | InvocationException; | ||
| 277 | |||
| 278 | /** | ||
| 279 | * Prevents garbage collection for this object. By default all | ||
| 280 | * {@link ObjectReference} values returned by JDI may be collected | ||
| 281 | * at any time the target VM is running. A call to this method | ||
| 282 | * guarantees that the object will not be collected. | ||
| 283 | * {@link #enableCollection} can be used to allow collection once | ||
| 284 | * again. | ||
| 285 | * <p> | ||
| 286 | * Calls to this method are counted. Every call to this method | ||
| 287 | * requires a corresponding call to {@link #enableCollection} before | ||
| 288 | * garbage collection is re-enabled. | ||
| 289 | * <p> | ||
| 290 | * Note that while the target VM is suspended, no garbage collection | ||
| 291 | * will occur because all threads are suspended. The typical | ||
| 292 | * examination of variables, fields, and arrays during the suspension | ||
| 293 | * is safe without explicitly disabling garbage collection. | ||
| 294 | * <p> | ||
| 295 | * This method should be used sparingly, as it alters the | ||
| 296 | * pattern of garbage collection in the target VM and, | ||
| 297 | * consequently, may result in application behavior under the | ||
| 298 | * debugger that differs from its non-debugged behavior. | ||
| 299 | * @throws VMCannotBeModifiedException if the VirtualMachine is read-only | ||
| 300 | * -see {@link VirtualMachine#canBeModified()}. | ||
| 301 | */ | ||
| 302 | void disableCollection(); | ||
| 303 | |||
| 304 | /** | ||
| 305 | * Permits garbage collection for this object. By default all | ||
| 306 | * {@link ObjectReference} values returned by JDI may be collected | ||
| 307 | * at any time the target VM is running. A call to this method | ||
| 308 | * is necessary only if garbage collection was previously disabled | ||
| 309 | * with {@link #disableCollection}. | ||
| 310 | * @throws VMCannotBeModifiedException if the VirtualMachine is read-only | ||
| 311 | * -see {@link VirtualMachine#canBeModified()}. | ||
| 312 | */ | ||
| 313 | void enableCollection(); | ||
| 314 | |||
| 315 | /** | ||
| 316 | * Determines if this object has been garbage collected in the target | ||
| 317 | * VM. | ||
| 318 | * | ||
| 319 | * @return <code>true</code> if this {@link ObjectReference} has been collected; | ||
| 320 | * <code>false</code> otherwise. | ||
| 321 | * @throws VMCannotBeModifiedException if the VirtualMachine is read-only | ||
| 322 | * -see {@link VirtualMachine#canBeModified()}. | ||
| 323 | */ | ||
| 324 | boolean isCollected(); | ||
| 325 | |||
| 326 | /** | ||
| 327 | * Returns a unique identifier for this ObjectReference. | ||
| 328 | * It is guaranteed to be unique among all | ||
| 329 | * ObjectReferences from the same VM that have not yet been disposed. | ||
| 330 | * The guarantee applies as long | ||
| 331 | * as this ObjectReference has not yet been disposed. | ||
| 332 | * | ||
| 333 | * @return a long unique ID | ||
| 334 | */ | ||
| 335 | long uniqueID(); | ||
| 336 | |||
| 337 | /** | ||
| 338 | * Returns a List containing a {@link ThreadReference} for | ||
| 339 | * each thread currently waiting for this object's monitor. | ||
| 340 | * See {@link ThreadReference#currentContendedMonitor} for | ||
| 341 | * information about when a thread is considered to be waiting | ||
| 342 | * for a monitor. | ||
| 343 | * <p> | ||
| 344 | * Not all target VMs support this operation. See | ||
| 345 | * VirtualMachine#canGetMonitorInfo to determine if the | ||
| 346 | * operation is supported. | ||
| 347 | * | ||
| 348 | * @return a List of {@link ThreadReference} objects. The list | ||
| 349 | * has zero length if no threads are waiting for the monitor. | ||
| 350 | * @throws java.lang.UnsupportedOperationException if the | ||
| 351 | * target VM does not support this operation. | ||
| 352 | * @throws IncompatibleThreadStateException if any | ||
| 353 | * waiting thread is not suspended | ||
| 354 | * in the target VM | ||
| 355 | */ | ||
| 356 | List<ThreadReference> waitingThreads() | ||
| 357 | throws IncompatibleThreadStateException; | ||
| 358 | |||
| 359 | /** | ||
| 360 | * Returns an {@link ThreadReference} for the thread, if any, | ||
| 361 | * which currently owns this object's monitor. | ||
| 362 | * See {@link ThreadReference#ownedMonitors} for a definition | ||
| 363 | * of ownership. | ||
| 364 | * <p> | ||
| 365 | * Not all target VMs support this operation. See | ||
| 366 | * VirtualMachine#canGetMonitorInfo to determine if the | ||
| 367 | * operation is supported. | ||
| 368 | * | ||
| 369 | * @return the {@link ThreadReference} which currently owns the | ||
| 370 | * monitor, or null if it is unowned. | ||
| 371 | * | ||
| 372 | * @throws java.lang.UnsupportedOperationException if the | ||
| 373 | * target VM does not support this operation. | ||
| 374 | * @throws IncompatibleThreadStateException if the owning thread is | ||
| 375 | * not suspended in the target VM | ||
| 376 | */ | ||
| 377 | ThreadReference owningThread() throws IncompatibleThreadStateException; | ||
| 378 | |||
| 379 | /** | ||
| 380 | * Returns the number times this object's monitor has been | ||
| 381 | * entered by the current owning thread. | ||
| 382 | * See {@link ThreadReference#ownedMonitors} for a definition | ||
| 383 | * of ownership. | ||
| 384 | * <p> | ||
| 385 | * Not all target VMs support this operation. See | ||
| 386 | * VirtualMachine#canGetMonitorInfo to determine if the | ||
| 387 | * operation is supported. | ||
| 388 | * | ||
| 389 | * @see #owningThread | ||
| 390 | * @return the integer count of the number of entries. | ||
| 391 | * | ||
| 392 | * @throws java.lang.UnsupportedOperationException if the | ||
| 393 | * target VM does not support this operation. | ||
| 394 | * @throws IncompatibleThreadStateException if the owning thread is | ||
| 395 | * not suspended in the target VM | ||
| 396 | */ | ||
| 397 | int entryCount() throws IncompatibleThreadStateException; | ||
| 398 | |||
| 399 | /** | ||
| 400 | * Returns objects that directly reference this object. | ||
| 401 | * Only objects that are reachable for the purposes of garbage collection | ||
| 402 | * are returned. Note that an object can also be referenced in other ways, | ||
| 403 | * such as from a local variable in a stack frame, or from a JNI global | ||
| 404 | * reference. Such non-object referrers are not returned by this method. | ||
| 405 | * <p> | ||
| 406 | * Not all target virtual machines support this operation. | ||
| 407 | * Use {@link VirtualMachine#canGetInstanceInfo()} | ||
| 408 | * to determine if the operation is supported. | ||
| 409 | * | ||
| 410 | * @see VirtualMachine#instanceCounts(List) | ||
| 411 | * @see ReferenceType#instances(long) | ||
| 412 | |||
| 413 | * @param maxReferrers The maximum number of referring objects to return. | ||
| 414 | * Must be non-negative. If zero, all referring | ||
| 415 | * objects are returned. | ||
| 416 | * @return a of List of {@link ObjectReference} objects. If there are | ||
| 417 | * no objects that reference this object, a zero-length list is returned.. | ||
| 418 | * @throws java.lang.UnsupportedOperationException if | ||
| 419 | * the target virtual machine does not support this | ||
| 420 | * operation - see | ||
| 421 | * {@link VirtualMachine#canGetInstanceInfo() canGetInstanceInfo()} | ||
| 422 | * @throws java.lang.IllegalArgumentException if maxReferrers is less | ||
| 423 | * than zero. | ||
| 424 | * @since 1.6 | ||
| 425 | */ | ||
| 426 | List<ObjectReference> referringObjects(long maxReferrers); | ||
| 427 | |||
| 428 | |||
| 429 | /** | ||
| 430 | * Compares the specified Object with this ObjectReference for equality. | ||
| 431 | * | ||
| 432 | * @return true if the Object is an ObjectReference, if the | ||
| 433 | * ObjectReferences belong to the same VM, and if applying the | ||
| 434 | * "==" operator on the mirrored objects in that VM evaluates to true. | ||
| 435 | */ | ||
| 436 | boolean equals(Object obj); | ||
| 437 | |||
| 438 | /** | ||
| 439 | * Returns the hash code value for this ObjectReference. | ||
| 440 | * | ||
| 441 | * @return the integer hash code | ||
| 442 | */ | ||
| 443 | int hashCode(); | ||
| 444 | } | ||