UserAccessorProperty.java revision 1626:d99fa86747ee
1/* 2 * Copyright (c) 2010, 2013, 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 26package jdk.nashorn.internal.runtime; 27import static jdk.nashorn.internal.lookup.Lookup.MH; 28import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; 29import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED; 30import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT; 31import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.CALLSITE_PROGRAM_POINT_SHIFT; 32 33import java.lang.invoke.MethodHandle; 34import java.lang.invoke.MethodHandles; 35import java.lang.invoke.MethodType; 36import java.util.concurrent.Callable; 37import jdk.nashorn.internal.lookup.Lookup; 38import jdk.nashorn.internal.runtime.linker.Bootstrap; 39import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor; 40 41/** 42 * Property with user defined getters/setters. Actual getter and setter 43 * functions are stored in underlying ScriptObject. Only the 'slot' info is 44 * stored in the property. 45 */ 46public final class UserAccessorProperty extends SpillProperty { 47 48 private static final long serialVersionUID = -5928687246526840321L; 49 50 static final class Accessors { 51 Object getter; 52 Object setter; 53 54 Accessors(final Object getter, final Object setter) { 55 set(getter, setter); 56 } 57 58 final void set(final Object getter, final Object setter) { 59 this.getter = getter; 60 this.setter = setter; 61 } 62 63 @Override 64 public String toString() { 65 return "[getter=" + getter + " setter=" + setter + ']'; 66 } 67 } 68 69 private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup(); 70 71 /** Getter method handle */ 72 private final static MethodHandle INVOKE_OBJECT_GETTER = findOwnMH_S("invokeObjectGetter", Object.class, Accessors.class, MethodHandle.class, Object.class); 73 private final static MethodHandle INVOKE_INT_GETTER = findOwnMH_S("invokeIntGetter", int.class, Accessors.class, MethodHandle.class, int.class, Object.class); 74 private final static MethodHandle INVOKE_NUMBER_GETTER = findOwnMH_S("invokeNumberGetter", double.class, Accessors.class, MethodHandle.class, int.class, Object.class); 75 76 /** Setter method handle */ 77 private final static MethodHandle INVOKE_OBJECT_SETTER = findOwnMH_S("invokeObjectSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, Object.class); 78 private final static MethodHandle INVOKE_INT_SETTER = findOwnMH_S("invokeIntSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, int.class); 79 private final static MethodHandle INVOKE_NUMBER_SETTER = findOwnMH_S("invokeNumberSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, double.class); 80 81 private static final Object OBJECT_GETTER_INVOKER_KEY = new Object(); 82 private static MethodHandle getObjectGetterInvoker() { 83 return Context.getGlobal().getDynamicInvoker(OBJECT_GETTER_INVOKER_KEY, new Callable<MethodHandle>() { 84 @Override 85 public MethodHandle call() throws Exception { 86 return getINVOKE_UA_GETTER(Object.class, INVALID_PROGRAM_POINT); 87 } 88 }); 89 } 90 91 static MethodHandle getINVOKE_UA_GETTER(final Class<?> returnType, final int programPoint) { 92 if (UnwarrantedOptimismException.isValid(programPoint)) { 93 final int flags = NashornCallSiteDescriptor.CALL | NashornCallSiteDescriptor.CALLSITE_OPTIMISTIC | programPoint << CALLSITE_PROGRAM_POINT_SHIFT; 94 return Bootstrap.createDynamicInvoker("", flags, returnType, Object.class, Object.class); 95 } else { 96 return Bootstrap.createDynamicCallInvoker(Object.class, Object.class, Object.class); 97 } 98 } 99 100 private static final Object OBJECT_SETTER_INVOKER_KEY = new Object(); 101 private static MethodHandle getObjectSetterInvoker() { 102 return Context.getGlobal().getDynamicInvoker(OBJECT_SETTER_INVOKER_KEY, new Callable<MethodHandle>() { 103 @Override 104 public MethodHandle call() throws Exception { 105 return getINVOKE_UA_SETTER(Object.class); 106 } 107 }); 108 } 109 110 static MethodHandle getINVOKE_UA_SETTER(final Class<?> valueType) { 111 return Bootstrap.createDynamicCallInvoker(void.class, Object.class, Object.class, valueType); 112 } 113 114 /** 115 * Constructor 116 * 117 * @param key property key 118 * @param flags property flags 119 * @param slot spill slot 120 */ 121 UserAccessorProperty(final Object key, final int flags, final int slot) { 122 // Always set accessor property flag for this class 123 super(key, flags | IS_ACCESSOR_PROPERTY, slot); 124 } 125 126 private UserAccessorProperty(final UserAccessorProperty property) { 127 super(property); 128 } 129 130 private UserAccessorProperty(final UserAccessorProperty property, final Class<?> newType) { 131 super(property, newType); 132 } 133 134 @Override 135 public Property copy() { 136 return new UserAccessorProperty(this); 137 } 138 139 @Override 140 public Property copy(final Class<?> newType) { 141 return new UserAccessorProperty(this, newType); 142 } 143 144 void setAccessors(final ScriptObject sobj, final PropertyMap map, final Accessors gs) { 145 try { 146 //invoke the getter and find out 147 super.getSetter(Object.class, map).invokeExact((Object)sobj, (Object)gs); 148 } catch (final Error | RuntimeException t) { 149 throw t; 150 } catch (final Throwable t) { 151 throw new RuntimeException(t); 152 } 153 } 154 155 //pick the getter setter out of the correct spill slot in sobj 156 Accessors getAccessors(final ScriptObject sobj) { 157 try { 158 //invoke the super getter with this spill slot 159 //get the getter setter from the correct spill slot 160 final Object gs = super.getGetter(Object.class).invokeExact((Object)sobj); 161 return (Accessors)gs; 162 } catch (final Error | RuntimeException t) { 163 throw t; 164 } catch (final Throwable t) { 165 throw new RuntimeException(t); 166 } 167 } 168 169 @Override 170 protected Class<?> getLocalType() { 171 return Object.class; 172 } 173 174 @Override 175 public boolean hasGetterFunction(final ScriptObject sobj) { 176 return getAccessors(sobj).getter != null; 177 } 178 179 @Override 180 public boolean hasSetterFunction(final ScriptObject sobj) { 181 return getAccessors(sobj).setter != null; 182 } 183 184 @Override 185 public int getIntValue(final ScriptObject self, final ScriptObject owner) { 186 return (int)getObjectValue(self, owner); 187 } 188 189 @Override 190 public double getDoubleValue(final ScriptObject self, final ScriptObject owner) { 191 return (double)getObjectValue(self, owner); 192 } 193 194 @Override 195 public Object getObjectValue(final ScriptObject self, final ScriptObject owner) { 196 try { 197 return invokeObjectGetter(getAccessors((owner != null) ? owner : self), getObjectGetterInvoker(), self); 198 } catch (final Error | RuntimeException t) { 199 throw t; 200 } catch (final Throwable t) { 201 throw new RuntimeException(t); 202 } 203 } 204 205 @Override 206 public void setValue(final ScriptObject self, final ScriptObject owner, final int value, final boolean strict) { 207 setValue(self, owner, (Object) value, strict); 208 } 209 210 @Override 211 public void setValue(final ScriptObject self, final ScriptObject owner, final double value, final boolean strict) { 212 setValue(self, owner, (Object) value, strict); 213 } 214 215 @Override 216 public void setValue(final ScriptObject self, final ScriptObject owner, final Object value, final boolean strict) { 217 try { 218 invokeObjectSetter(getAccessors((owner != null) ? owner : self), getObjectSetterInvoker(), strict ? getKey().toString() : null, self, value); 219 } catch (final Error | RuntimeException t) { 220 throw t; 221 } catch (final Throwable t) { 222 throw new RuntimeException(t); 223 } 224 } 225 226 @Override 227 public MethodHandle getGetter(final Class<?> type) { 228 //this returns a getter on the format (Accessors, Object receiver) 229 return Lookup.filterReturnType(INVOKE_OBJECT_GETTER, type); 230 } 231 232 @Override 233 public MethodHandle getOptimisticGetter(final Class<?> type, final int programPoint) { 234 if (type == int.class) { 235 return INVOKE_INT_GETTER; 236 } else if (type == double.class) { 237 return INVOKE_NUMBER_GETTER; 238 } else { 239 assert type == Object.class; 240 return INVOKE_OBJECT_GETTER; 241 } 242 } 243 244 @Override 245 void initMethodHandles(final Class<?> structure) { 246 throw new UnsupportedOperationException(); 247 } 248 249 @Override 250 public ScriptFunction getGetterFunction(final ScriptObject sobj) { 251 final Object value = getAccessors(sobj).getter; 252 return (value instanceof ScriptFunction) ? (ScriptFunction)value : null; 253 } 254 255 @Override 256 public MethodHandle getSetter(final Class<?> type, final PropertyMap currentMap) { 257 if (type == int.class) { 258 return INVOKE_INT_SETTER; 259 } else if (type == double.class) { 260 return INVOKE_NUMBER_SETTER; 261 } else { 262 assert type == Object.class; 263 return INVOKE_OBJECT_SETTER; 264 } 265 } 266 267 @Override 268 public ScriptFunction getSetterFunction(final ScriptObject sobj) { 269 final Object value = getAccessors(sobj).setter; 270 return (value instanceof ScriptFunction) ? (ScriptFunction)value : null; 271 } 272 273 /** 274 * Get the getter for the {@code Accessors} object. 275 * This is the the super {@code Object} type getter with {@code Accessors} return type. 276 * 277 * @return The getter handle for the Accessors 278 */ 279 MethodHandle getAccessorsGetter() { 280 return super.getGetter(Object.class).asType(MethodType.methodType(Accessors.class, Object.class)); 281 } 282 283 // User defined getter and setter are always called by StandardOperation.CALL. Note that the user 284 // getter/setter may be inherited. If so, proto is bound during lookup. In either 285 // inherited or self case, slot is also bound during lookup. Actual ScriptFunction 286 // to be called is retrieved everytime and applied. 287 @SuppressWarnings("unused") 288 private static Object invokeObjectGetter(final Accessors gs, final MethodHandle invoker, final Object self) throws Throwable { 289 final Object func = gs.getter; 290 if (func instanceof ScriptFunction) { 291 return invoker.invokeExact(func, self); 292 } 293 294 return UNDEFINED; 295 } 296 297 @SuppressWarnings("unused") 298 private static int invokeIntGetter(final Accessors gs, final MethodHandle invoker, final int programPoint, final Object self) throws Throwable { 299 final Object func = gs.getter; 300 if (func instanceof ScriptFunction) { 301 return (int) invoker.invokeExact(func, self); 302 } 303 304 throw new UnwarrantedOptimismException(UNDEFINED, programPoint); 305 } 306 307 @SuppressWarnings("unused") 308 private static double invokeNumberGetter(final Accessors gs, final MethodHandle invoker, final int programPoint, final Object self) throws Throwable { 309 final Object func = gs.getter; 310 if (func instanceof ScriptFunction) { 311 return (double) invoker.invokeExact(func, self); 312 } 313 314 throw new UnwarrantedOptimismException(UNDEFINED, programPoint); 315 } 316 317 @SuppressWarnings("unused") 318 private static void invokeObjectSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final Object value) throws Throwable { 319 final Object func = gs.setter; 320 if (func instanceof ScriptFunction) { 321 invoker.invokeExact(func, self, value); 322 } else if (name != null) { 323 throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self)); 324 } 325 } 326 327 @SuppressWarnings("unused") 328 private static void invokeIntSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final int value) throws Throwable { 329 final Object func = gs.setter; 330 if (func instanceof ScriptFunction) { 331 invoker.invokeExact(func, self, value); 332 } else if (name != null) { 333 throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self)); 334 } 335 } 336 337 @SuppressWarnings("unused") 338 private static void invokeNumberSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final double value) throws Throwable { 339 final Object func = gs.setter; 340 if (func instanceof ScriptFunction) { 341 invoker.invokeExact(func, self, value); 342 } else if (name != null) { 343 throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self)); 344 } 345 } 346 347 private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) { 348 return MH.findStatic(LOOKUP, UserAccessorProperty.class, name, MH.type(rtype, types)); 349 } 350 351} 352