Mon, 18 Feb 2013 16:00:15 +0100
8008371: Fix Dynalink compiler warnings and whitespace
Reviewed-by: jlaskey, sundar
attila@90 | 1 | /* |
attila@90 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
attila@90 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
attila@90 | 4 | * |
attila@90 | 5 | * This code is free software; you can redistribute it and/or modify it |
attila@90 | 6 | * under the terms of the GNU General Public License version 2 only, as |
attila@90 | 7 | * published by the Free Software Foundation. Oracle designates this |
attila@90 | 8 | * particular file as subject to the "Classpath" exception as provided |
attila@90 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
attila@90 | 10 | * |
attila@90 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
attila@90 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
attila@90 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
attila@90 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
attila@90 | 15 | * accompanied this code). |
attila@90 | 16 | * |
attila@90 | 17 | * You should have received a copy of the GNU General Public License version |
attila@90 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
attila@90 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
attila@90 | 20 | * |
attila@90 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
attila@90 | 22 | * or visit www.oracle.com if you need additional information or have any |
attila@90 | 23 | * questions. |
attila@90 | 24 | */ |
attila@90 | 25 | |
attila@90 | 26 | /* |
attila@90 | 27 | * This file is available under and governed by the GNU General Public |
attila@90 | 28 | * License version 2 only, as published by the Free Software Foundation. |
attila@90 | 29 | * However, the following notice accompanied the original version of this |
attila@90 | 30 | * file, and Oracle licenses the original version of this file under the BSD |
attila@90 | 31 | * license: |
attila@90 | 32 | */ |
attila@90 | 33 | /* |
attila@90 | 34 | Copyright 2009-2013 Attila Szegedi |
attila@90 | 35 | |
attila@90 | 36 | Licensed under both the Apache License, Version 2.0 (the "Apache License") |
attila@90 | 37 | and the BSD License (the "BSD License"), with licensee being free to |
attila@90 | 38 | choose either of the two at their discretion. |
attila@90 | 39 | |
attila@90 | 40 | You may not use this file except in compliance with either the Apache |
attila@90 | 41 | License or the BSD License. |
attila@90 | 42 | |
attila@90 | 43 | If you choose to use this file in compliance with the Apache License, the |
attila@90 | 44 | following notice applies to you: |
attila@90 | 45 | |
attila@90 | 46 | You may obtain a copy of the Apache License at |
attila@90 | 47 | |
attila@90 | 48 | http://www.apache.org/licenses/LICENSE-2.0 |
attila@90 | 49 | |
attila@90 | 50 | Unless required by applicable law or agreed to in writing, software |
attila@90 | 51 | distributed under the License is distributed on an "AS IS" BASIS, |
attila@90 | 52 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
attila@90 | 53 | implied. See the License for the specific language governing |
attila@90 | 54 | permissions and limitations under the License. |
attila@90 | 55 | |
attila@90 | 56 | If you choose to use this file in compliance with the BSD License, the |
attila@90 | 57 | following notice applies to you: |
attila@90 | 58 | |
attila@90 | 59 | Redistribution and use in source and binary forms, with or without |
attila@90 | 60 | modification, are permitted provided that the following conditions are |
attila@90 | 61 | met: |
attila@90 | 62 | * Redistributions of source code must retain the above copyright |
attila@90 | 63 | notice, this list of conditions and the following disclaimer. |
attila@90 | 64 | * Redistributions in binary form must reproduce the above copyright |
attila@90 | 65 | notice, this list of conditions and the following disclaimer in the |
attila@90 | 66 | documentation and/or other materials provided with the distribution. |
attila@90 | 67 | * Neither the name of the copyright holder nor the names of |
attila@90 | 68 | contributors may be used to endorse or promote products derived from |
attila@90 | 69 | this software without specific prior written permission. |
attila@90 | 70 | |
attila@90 | 71 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
attila@90 | 72 | IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
attila@90 | 73 | TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
attila@90 | 74 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
attila@90 | 75 | BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
attila@90 | 76 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
attila@90 | 77 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
attila@90 | 78 | BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
attila@90 | 79 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
attila@90 | 80 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
attila@90 | 81 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
attila@90 | 82 | */ |
attila@90 | 83 | |
attila@90 | 84 | package jdk.internal.dynalink.beans; |
attila@90 | 85 | |
attila@90 | 86 | import java.lang.invoke.MethodHandle; |
attila@90 | 87 | import java.lang.invoke.MethodHandles; |
attila@90 | 88 | import java.lang.invoke.MethodType; |
attila@90 | 89 | import java.lang.reflect.Array; |
attila@90 | 90 | import java.util.Collection; |
attila@90 | 91 | import java.util.List; |
attila@90 | 92 | import java.util.Map; |
attila@90 | 93 | import jdk.internal.dynalink.CallSiteDescriptor; |
attila@90 | 94 | import jdk.internal.dynalink.beans.GuardedInvocationComponent.ValidationType; |
attila@90 | 95 | import jdk.internal.dynalink.linker.GuardedInvocation; |
attila@90 | 96 | import jdk.internal.dynalink.linker.LinkerServices; |
attila@90 | 97 | import jdk.internal.dynalink.linker.TypeBasedGuardingDynamicLinker; |
attila@90 | 98 | import jdk.internal.dynalink.support.Guards; |
attila@90 | 99 | import jdk.internal.dynalink.support.Lookup; |
attila@90 | 100 | import jdk.internal.dynalink.support.TypeUtilities; |
attila@90 | 101 | |
attila@90 | 102 | /** |
attila@90 | 103 | * A class that provides linking capabilities for a single POJO class. Normally not used directly, but managed by |
attila@90 | 104 | * {@link BeansLinker}. |
attila@90 | 105 | * |
attila@90 | 106 | * @author Attila Szegedi |
attila@90 | 107 | */ |
attila@90 | 108 | class BeanLinker extends AbstractJavaLinker implements TypeBasedGuardingDynamicLinker { |
attila@90 | 109 | BeanLinker(Class<?> clazz) { |
attila@90 | 110 | super(clazz, Guards.getClassGuard(clazz), Guards.getInstanceOfGuard(clazz)); |
attila@90 | 111 | if(clazz.isArray()) { |
attila@90 | 112 | // Some languages won't have a notion of manipulating collections. Exposing "length" on arrays as an |
attila@90 | 113 | // explicit property is beneficial for them. |
attila@90 | 114 | // REVISIT: is it maybe a code smell that "dyn:getLength" is not needed? |
attila@90 | 115 | setPropertyGetter("length", GET_ARRAY_LENGTH, ValidationType.IS_ARRAY); |
attila@90 | 116 | } |
attila@90 | 117 | } |
attila@90 | 118 | |
attila@90 | 119 | @Override |
attila@90 | 120 | public boolean canLinkType(Class<?> type) { |
attila@90 | 121 | return type == clazz; |
attila@90 | 122 | } |
attila@90 | 123 | |
attila@90 | 124 | @Override |
attila@90 | 125 | FacetIntrospector createFacetIntrospector() { |
attila@90 | 126 | return new BeanIntrospector(clazz); |
attila@90 | 127 | } |
attila@90 | 128 | |
attila@90 | 129 | @Override |
attila@90 | 130 | protected GuardedInvocationComponent getGuardedInvocationComponent(CallSiteDescriptor callSiteDescriptor, |
attila@90 | 131 | LinkerServices linkerServices, List<String> operations) throws Exception { |
attila@90 | 132 | final GuardedInvocationComponent superGic = super.getGuardedInvocationComponent(callSiteDescriptor, |
attila@90 | 133 | linkerServices, operations); |
attila@90 | 134 | if(superGic != null) { |
attila@90 | 135 | return superGic; |
attila@90 | 136 | } |
attila@90 | 137 | if(operations.isEmpty()) { |
attila@90 | 138 | return null; |
attila@90 | 139 | } |
attila@90 | 140 | final String op = operations.get(0); |
attila@90 | 141 | // dyn:getElem(this, id) |
attila@90 | 142 | // id is typically either an int (for arrays and lists) or an object (for maps). linkerServices can provide |
attila@90 | 143 | // conversion from call site argument type though. |
attila@90 | 144 | if("getElem".equals(op)) { |
attila@90 | 145 | return getElementGetter(callSiteDescriptor, linkerServices, pop(operations)); |
attila@90 | 146 | } |
attila@90 | 147 | if("setElem".equals(op)) { |
attila@90 | 148 | return getElementSetter(callSiteDescriptor, linkerServices, pop(operations)); |
attila@90 | 149 | } |
attila@90 | 150 | // dyn:getLength(this) (works on Java arrays, collections, and maps) |
attila@90 | 151 | if("getLength".equals(op)) { |
attila@90 | 152 | return getLengthGetter(callSiteDescriptor); |
attila@90 | 153 | } |
attila@90 | 154 | return null; |
attila@90 | 155 | } |
attila@90 | 156 | |
attila@90 | 157 | private static MethodHandle GET_LIST_ELEMENT = Lookup.PUBLIC.findVirtual(List.class, "get", |
attila@90 | 158 | MethodType.methodType(Object.class, int.class)); |
attila@90 | 159 | |
attila@90 | 160 | private static MethodHandle GET_MAP_ELEMENT = Lookup.PUBLIC.findVirtual(Map.class, "get", |
attila@90 | 161 | MethodType.methodType(Object.class, Object.class)); |
attila@90 | 162 | |
attila@90 | 163 | private static MethodHandle LIST_GUARD = Guards.getInstanceOfGuard(List.class); |
attila@90 | 164 | private static MethodHandle MAP_GUARD = Guards.getInstanceOfGuard(Map.class); |
attila@90 | 165 | |
attila@90 | 166 | private GuardedInvocationComponent getElementGetter(final CallSiteDescriptor callSiteDescriptor, |
attila@90 | 167 | final LinkerServices linkerServices, List<String> operations) throws Exception { |
attila@90 | 168 | final MethodType callSiteType = callSiteDescriptor.getMethodType(); |
attila@90 | 169 | final Class<?> declaredType = callSiteType.parameterType(0); |
attila@90 | 170 | final GuardedInvocationComponent nextComponent = getGuardedInvocationComponent(callSiteDescriptor, |
attila@90 | 171 | linkerServices, operations); |
attila@90 | 172 | |
attila@90 | 173 | // If declared type of receiver at the call site is already an array, a list or map, bind without guard. Thing |
attila@90 | 174 | // is, it'd be quite stupid of a call site creator to go though invokedynamic when it knows in advance they're |
attila@90 | 175 | // dealing with an array, or a list or map, but hey... |
attila@90 | 176 | // Note that for arrays and lists, using LinkerServices.asType() will ensure that any language specific linkers |
attila@90 | 177 | // in use will get a chance to perform any (if there's any) implicit conversion to integer for the indices. |
attila@101 | 178 | final GuardedInvocationComponent gic; |
attila@90 | 179 | final boolean isMap; |
attila@90 | 180 | if(declaredType.isArray()) { |
attila@90 | 181 | gic = new GuardedInvocationComponent(MethodHandles.arrayElementGetter(declaredType)); |
attila@90 | 182 | isMap = false; |
attila@90 | 183 | } else if(List.class.isAssignableFrom(declaredType)) { |
attila@90 | 184 | gic = new GuardedInvocationComponent(GET_LIST_ELEMENT); |
attila@90 | 185 | isMap = false; |
attila@90 | 186 | } else if(Map.class.isAssignableFrom(declaredType)) { |
attila@90 | 187 | gic = new GuardedInvocationComponent(GET_MAP_ELEMENT); |
attila@90 | 188 | isMap = true; |
attila@90 | 189 | } else if(clazz.isArray()) { |
attila@90 | 190 | gic = getClassGuardedInvocationComponent(MethodHandles.arrayElementGetter(clazz), callSiteType); |
attila@90 | 191 | isMap = false; |
attila@90 | 192 | } else if(List.class.isAssignableFrom(clazz)) { |
attila@90 | 193 | gic = new GuardedInvocationComponent(GET_LIST_ELEMENT, Guards.asType(LIST_GUARD, callSiteType), List.class, |
attila@90 | 194 | ValidationType.INSTANCE_OF); |
attila@90 | 195 | isMap = false; |
attila@90 | 196 | } else if(Map.class.isAssignableFrom(clazz)) { |
attila@90 | 197 | gic = new GuardedInvocationComponent(GET_MAP_ELEMENT, Guards.asType(MAP_GUARD, callSiteType), Map.class, |
attila@90 | 198 | ValidationType.INSTANCE_OF); |
attila@90 | 199 | isMap = true; |
attila@90 | 200 | } else { |
attila@90 | 201 | // Can't retrieve elements for objects that are neither arrays, nor list, nor maps. |
attila@90 | 202 | return nextComponent; |
attila@90 | 203 | } |
attila@90 | 204 | |
attila@90 | 205 | // We can have "dyn:getElem:foo", especially in composites, i.e. "dyn:getElem|getProp|getMethod:foo" |
attila@90 | 206 | final String fixedKey = getFixedKey(callSiteDescriptor); |
attila@90 | 207 | // Convert the key to a number if we're working with a list or array |
attila@90 | 208 | final Object typedFixedKey; |
attila@90 | 209 | if(!isMap && fixedKey != null) { |
attila@90 | 210 | typedFixedKey = convertKeyToInteger(fixedKey, linkerServices); |
attila@90 | 211 | if(typedFixedKey == null) { |
attila@90 | 212 | // key is not numeric, it can never succeed |
attila@90 | 213 | return nextComponent; |
attila@90 | 214 | } |
attila@90 | 215 | } else { |
attila@90 | 216 | typedFixedKey = fixedKey; |
attila@90 | 217 | } |
attila@90 | 218 | |
attila@90 | 219 | final GuardedInvocation gi = gic.getGuardedInvocation(); |
attila@90 | 220 | final Binder binder = new Binder(linkerServices, callSiteType, typedFixedKey); |
attila@90 | 221 | final MethodHandle invocation = gi.getInvocation(); |
attila@90 | 222 | |
attila@90 | 223 | if(nextComponent == null) { |
attila@90 | 224 | return gic.replaceInvocation(binder.bind(invocation)); |
attila@101 | 225 | } |
attila@101 | 226 | |
attila@101 | 227 | final MethodHandle checkGuard; |
attila@101 | 228 | if(invocation == GET_LIST_ELEMENT) { |
attila@101 | 229 | checkGuard = convertArgToInt(RANGE_CHECK_LIST, linkerServices, callSiteDescriptor); |
attila@101 | 230 | } else if(invocation == GET_MAP_ELEMENT) { |
attila@101 | 231 | // TODO: A more complex solution could be devised for maps, one where we do a get() first, and fold it |
attila@101 | 232 | // into a GWT that tests if it returned null, and if it did, do another GWT with containsKey() |
attila@101 | 233 | // that returns constant null (on true), or falls back to next component (on false) |
attila@101 | 234 | checkGuard = CONTAINS_MAP; |
attila@90 | 235 | } else { |
attila@101 | 236 | checkGuard = convertArgToInt(RANGE_CHECK_ARRAY, linkerServices, callSiteDescriptor); |
attila@90 | 237 | } |
attila@101 | 238 | return nextComponent.compose(MethodHandles.guardWithTest(binder.bindTest(checkGuard), |
attila@101 | 239 | binder.bind(invocation), nextComponent.getGuardedInvocation().getInvocation()), gi.getGuard(), |
attila@101 | 240 | gic.getValidatorClass(), gic.getValidationType()); |
attila@90 | 241 | } |
attila@90 | 242 | |
attila@90 | 243 | private static String getFixedKey(final CallSiteDescriptor callSiteDescriptor) { |
attila@90 | 244 | return callSiteDescriptor.getNameTokenCount() == 2 ? null : callSiteDescriptor.getNameToken( |
attila@90 | 245 | CallSiteDescriptor.NAME_OPERAND); |
attila@90 | 246 | } |
attila@90 | 247 | |
attila@90 | 248 | private static Object convertKeyToInteger(String fixedKey, LinkerServices linkerServices) throws Exception { |
attila@90 | 249 | try { |
attila@90 | 250 | if(linkerServices.canConvert(String.class, Number.class)) { |
attila@90 | 251 | try { |
attila@90 | 252 | final Object val = linkerServices.getTypeConverter(String.class, Number.class).invoke(fixedKey); |
attila@90 | 253 | if(!(val instanceof Number)) { |
attila@90 | 254 | return null; // not a number |
attila@90 | 255 | } |
attila@90 | 256 | final Number n = (Number)val; |
attila@90 | 257 | if(n instanceof Integer) { |
attila@90 | 258 | return n; |
attila@90 | 259 | } |
attila@90 | 260 | final int intIndex = n.intValue(); |
attila@90 | 261 | final double doubleValue = n.doubleValue(); |
attila@90 | 262 | if(intIndex != doubleValue && !Double.isInfinite(doubleValue)) { // let infinites trigger IOOBE |
attila@90 | 263 | return null; // not an exact integer |
attila@90 | 264 | } |
attila@90 | 265 | return Integer.valueOf(intIndex); |
attila@90 | 266 | } catch(Exception|Error e) { |
attila@90 | 267 | throw e; |
attila@90 | 268 | } catch(Throwable t) { |
attila@90 | 269 | throw new RuntimeException(t); |
attila@90 | 270 | } |
attila@90 | 271 | } |
attila@90 | 272 | return Integer.valueOf(fixedKey); |
attila@90 | 273 | } catch(NumberFormatException e) { |
attila@90 | 274 | // key is not a number |
attila@90 | 275 | return null; |
attila@90 | 276 | } |
attila@90 | 277 | } |
attila@90 | 278 | |
attila@90 | 279 | private static MethodHandle convertArgToInt(MethodHandle mh, LinkerServices ls, CallSiteDescriptor desc) { |
attila@90 | 280 | final Class<?> sourceType = desc.getMethodType().parameterType(1); |
attila@90 | 281 | if(TypeUtilities.isMethodInvocationConvertible(sourceType, Number.class)) { |
attila@90 | 282 | return mh; |
attila@90 | 283 | } else if(ls.canConvert(sourceType, Number.class)) { |
attila@90 | 284 | final MethodHandle converter = ls.getTypeConverter(sourceType, Number.class); |
attila@90 | 285 | return MethodHandles.filterArguments(mh, 1, converter.asType(converter.type().changeReturnType( |
attila@90 | 286 | mh.type().parameterType(1)))); |
attila@90 | 287 | } |
attila@90 | 288 | return mh; |
attila@90 | 289 | } |
attila@90 | 290 | |
attila@90 | 291 | /** |
attila@90 | 292 | * Contains methods to adapt an item getter/setter method handle to the requested type, optionally binding it to a |
attila@90 | 293 | * fixed key first. |
attila@90 | 294 | * @author Attila Szegedi |
attila@90 | 295 | * @version $Id: $ |
attila@90 | 296 | */ |
attila@90 | 297 | private static class Binder { |
attila@90 | 298 | private final LinkerServices linkerServices; |
attila@90 | 299 | private final MethodType methodType; |
attila@90 | 300 | private final Object fixedKey; |
attila@90 | 301 | |
attila@90 | 302 | Binder(LinkerServices linkerServices, MethodType methodType, Object fixedKey) { |
attila@90 | 303 | this.linkerServices = linkerServices; |
attila@90 | 304 | this.methodType = fixedKey == null ? methodType : methodType.insertParameterTypes(1, fixedKey.getClass()); |
attila@90 | 305 | this.fixedKey = fixedKey; |
attila@90 | 306 | } |
attila@90 | 307 | |
attila@90 | 308 | /*private*/ MethodHandle bind(MethodHandle handle) { |
attila@90 | 309 | return bindToFixedKey(linkerServices.asType(handle, methodType)); |
attila@90 | 310 | } |
attila@90 | 311 | |
attila@90 | 312 | /*private*/ MethodHandle bindTest(MethodHandle handle) { |
attila@90 | 313 | return bindToFixedKey(Guards.asType(handle, methodType)); |
attila@90 | 314 | } |
attila@90 | 315 | |
attila@90 | 316 | private MethodHandle bindToFixedKey(MethodHandle handle) { |
attila@90 | 317 | return fixedKey == null ? handle : MethodHandles.insertArguments(handle, 1, fixedKey); |
attila@90 | 318 | } |
attila@90 | 319 | } |
attila@90 | 320 | |
attila@90 | 321 | private static MethodHandle RANGE_CHECK_ARRAY = findRangeCheck(Object.class); |
attila@90 | 322 | private static MethodHandle RANGE_CHECK_LIST = findRangeCheck(List.class); |
attila@90 | 323 | private static MethodHandle CONTAINS_MAP = Lookup.PUBLIC.findVirtual(Map.class, "containsKey", |
attila@90 | 324 | MethodType.methodType(boolean.class, Object.class)); |
attila@90 | 325 | |
attila@90 | 326 | private static MethodHandle findRangeCheck(Class<?> collectionType) { |
attila@90 | 327 | return Lookup.findOwnStatic(MethodHandles.lookup(), "rangeCheck", boolean.class, collectionType, Object.class); |
attila@90 | 328 | } |
attila@90 | 329 | |
attila@90 | 330 | @SuppressWarnings("unused") |
attila@90 | 331 | private static final boolean rangeCheck(Object array, Object index) { |
attila@90 | 332 | if(!(index instanceof Number)) { |
attila@90 | 333 | return false; |
attila@90 | 334 | } |
attila@90 | 335 | final Number n = (Number)index; |
attila@90 | 336 | final int intIndex = n.intValue(); |
attila@90 | 337 | final double doubleValue = n.doubleValue(); |
attila@90 | 338 | if(intIndex != doubleValue && !Double.isInfinite(doubleValue)) { // let infinite trigger IOOBE |
attila@90 | 339 | return false; |
attila@90 | 340 | } |
attila@90 | 341 | if(0 <= intIndex && intIndex < Array.getLength(array)) { |
attila@90 | 342 | return true; |
attila@90 | 343 | } |
attila@90 | 344 | throw new ArrayIndexOutOfBoundsException("Array index out of range: " + n); |
attila@90 | 345 | } |
attila@90 | 346 | |
attila@90 | 347 | @SuppressWarnings("unused") |
attila@90 | 348 | private static final boolean rangeCheck(List<?> list, Object index) { |
attila@90 | 349 | if(!(index instanceof Number)) { |
attila@90 | 350 | return false; |
attila@90 | 351 | } |
attila@90 | 352 | final Number n = (Number)index; |
attila@90 | 353 | final int intIndex = n.intValue(); |
attila@90 | 354 | final double doubleValue = n.doubleValue(); |
attila@90 | 355 | if(intIndex != doubleValue && !Double.isInfinite(doubleValue)) { // let infinite trigger IOOBE |
attila@90 | 356 | return false; |
attila@90 | 357 | } |
attila@90 | 358 | if(0 <= intIndex && intIndex < list.size()) { |
attila@90 | 359 | return true; |
attila@90 | 360 | } |
attila@90 | 361 | throw new IndexOutOfBoundsException("Index: " + n + ", Size: " + list.size()); |
attila@90 | 362 | } |
attila@90 | 363 | |
attila@90 | 364 | private static MethodHandle SET_LIST_ELEMENT = Lookup.PUBLIC.findVirtual(List.class, "set", |
attila@90 | 365 | MethodType.methodType(Object.class, int.class, Object.class)); |
attila@90 | 366 | |
attila@90 | 367 | private static MethodHandle PUT_MAP_ELEMENT = Lookup.PUBLIC.findVirtual(Map.class, "put", |
attila@90 | 368 | MethodType.methodType(Object.class, Object.class, Object.class)); |
attila@90 | 369 | |
attila@90 | 370 | private GuardedInvocationComponent getElementSetter(CallSiteDescriptor callSiteDescriptor, |
attila@90 | 371 | LinkerServices linkerServices, List<String> operations) throws Exception { |
attila@90 | 372 | final MethodType callSiteType = callSiteDescriptor.getMethodType(); |
attila@90 | 373 | final Class<?> declaredType = callSiteType.parameterType(0); |
attila@90 | 374 | |
attila@90 | 375 | final GuardedInvocationComponent gic; |
attila@90 | 376 | // If declared type of receiver at the call site is already an array, a list or map, bind without guard. Thing |
attila@90 | 377 | // is, it'd be quite stupid of a call site creator to go though invokedynamic when it knows in advance they're |
attila@90 | 378 | // dealing with an array, or a list or map, but hey... |
attila@90 | 379 | // Note that for arrays and lists, using LinkerServices.asType() will ensure that any language specific linkers |
attila@90 | 380 | // in use will get a chance to perform any (if there's any) implicit conversion to integer for the indices. |
attila@90 | 381 | final boolean isMap; |
attila@90 | 382 | if(declaredType.isArray()) { |
attila@90 | 383 | gic = new GuardedInvocationComponent(MethodHandles.arrayElementSetter(declaredType)); |
attila@90 | 384 | isMap = false; |
attila@90 | 385 | } else if(List.class.isAssignableFrom(declaredType)) { |
attila@90 | 386 | gic = new GuardedInvocationComponent(SET_LIST_ELEMENT); |
attila@90 | 387 | isMap = false; |
attila@90 | 388 | } else if(Map.class.isAssignableFrom(declaredType)) { |
attila@90 | 389 | gic = new GuardedInvocationComponent(PUT_MAP_ELEMENT); |
attila@90 | 390 | isMap = true; |
attila@90 | 391 | } else if(clazz.isArray()) { |
attila@90 | 392 | gic = getClassGuardedInvocationComponent(MethodHandles.arrayElementSetter(clazz), callSiteType); |
attila@90 | 393 | isMap = false; |
attila@90 | 394 | } else if(List.class.isAssignableFrom(clazz)) { |
attila@90 | 395 | gic = new GuardedInvocationComponent(SET_LIST_ELEMENT, Guards.asType(LIST_GUARD, callSiteType), List.class, |
attila@90 | 396 | ValidationType.INSTANCE_OF); |
attila@90 | 397 | isMap = false; |
attila@90 | 398 | } else if(Map.class.isAssignableFrom(clazz)) { |
attila@90 | 399 | gic = new GuardedInvocationComponent(PUT_MAP_ELEMENT, Guards.asType(MAP_GUARD, callSiteType), Map.class, |
attila@90 | 400 | ValidationType.INSTANCE_OF); |
attila@90 | 401 | isMap = true; |
attila@90 | 402 | } else { |
attila@90 | 403 | // Can't set elements for objects that are neither arrays, nor list, nor maps. |
attila@90 | 404 | gic = null; |
attila@90 | 405 | isMap = false; |
attila@90 | 406 | } |
attila@90 | 407 | |
attila@90 | 408 | // In contrast to, say, getElementGetter, we only compute the nextComponent if the target object is not a map, |
attila@90 | 409 | // as maps will always succeed in setting the element and will never need to fall back to the next component |
attila@90 | 410 | // operation. |
attila@90 | 411 | final GuardedInvocationComponent nextComponent = isMap ? null : getGuardedInvocationComponent( |
attila@90 | 412 | callSiteDescriptor, linkerServices, operations); |
attila@90 | 413 | if(gic == null) { |
attila@90 | 414 | return nextComponent; |
attila@90 | 415 | } |
attila@90 | 416 | |
attila@90 | 417 | // We can have "dyn:setElem:foo", especially in composites, i.e. "dyn:setElem|setProp:foo" |
attila@90 | 418 | final String fixedKey = getFixedKey(callSiteDescriptor); |
attila@90 | 419 | // Convert the key to a number if we're working with a list or array |
attila@90 | 420 | final Object typedFixedKey; |
attila@90 | 421 | if(!isMap && fixedKey != null) { |
attila@90 | 422 | typedFixedKey = convertKeyToInteger(fixedKey, linkerServices); |
attila@90 | 423 | if(typedFixedKey == null) { |
attila@90 | 424 | // key is not numeric, it can never succeed |
attila@90 | 425 | return nextComponent; |
attila@90 | 426 | } |
attila@90 | 427 | } else { |
attila@90 | 428 | typedFixedKey = fixedKey; |
attila@90 | 429 | } |
attila@90 | 430 | |
attila@90 | 431 | final GuardedInvocation gi = gic.getGuardedInvocation(); |
attila@90 | 432 | final Binder binder = new Binder(linkerServices, callSiteType, typedFixedKey); |
attila@90 | 433 | final MethodHandle invocation = gi.getInvocation(); |
attila@90 | 434 | |
attila@90 | 435 | if(nextComponent == null) { |
attila@90 | 436 | return gic.replaceInvocation(binder.bind(invocation)); |
attila@90 | 437 | } |
attila@101 | 438 | |
attila@101 | 439 | final MethodHandle checkGuard = convertArgToInt(invocation == SET_LIST_ELEMENT ? RANGE_CHECK_LIST : |
attila@101 | 440 | RANGE_CHECK_ARRAY, linkerServices, callSiteDescriptor); |
attila@101 | 441 | return nextComponent.compose(MethodHandles.guardWithTest(binder.bindTest(checkGuard), |
attila@101 | 442 | binder.bind(invocation), nextComponent.getGuardedInvocation().getInvocation()), gi.getGuard(), |
attila@101 | 443 | gic.getValidatorClass(), gic.getValidationType()); |
attila@90 | 444 | } |
attila@90 | 445 | |
attila@90 | 446 | private static MethodHandle GET_ARRAY_LENGTH = Lookup.PUBLIC.findStatic(Array.class, "getLength", |
attila@90 | 447 | MethodType.methodType(int.class, Object.class)); |
attila@90 | 448 | |
attila@90 | 449 | private static MethodHandle GET_COLLECTION_LENGTH = Lookup.PUBLIC.findVirtual(Collection.class, "size", |
attila@90 | 450 | MethodType.methodType(int.class)); |
attila@90 | 451 | |
attila@90 | 452 | private static MethodHandle GET_MAP_LENGTH = Lookup.PUBLIC.findVirtual(Map.class, "size", |
attila@90 | 453 | MethodType.methodType(int.class)); |
attila@90 | 454 | |
attila@90 | 455 | private static MethodHandle COLLECTION_GUARD = Guards.getInstanceOfGuard(Collection.class); |
attila@90 | 456 | |
attila@90 | 457 | private GuardedInvocationComponent getLengthGetter(CallSiteDescriptor callSiteDescriptor) { |
attila@90 | 458 | assertParameterCount(callSiteDescriptor, 1); |
attila@90 | 459 | final MethodType callSiteType = callSiteDescriptor.getMethodType(); |
attila@90 | 460 | final Class<?> declaredType = callSiteType.parameterType(0); |
attila@90 | 461 | // If declared type of receiver at the call site is already an array, collection, or map, bind without guard. |
attila@90 | 462 | // Thing is, it'd be quite stupid of a call site creator to go though invokedynamic when it knows in advance |
attila@90 | 463 | // they're dealing with an array, collection, or map, but hey... |
attila@90 | 464 | if(declaredType.isArray()) { |
attila@90 | 465 | return new GuardedInvocationComponent(GET_ARRAY_LENGTH.asType(callSiteType)); |
attila@90 | 466 | } else if(Collection.class.isAssignableFrom(declaredType)) { |
attila@90 | 467 | return new GuardedInvocationComponent(GET_COLLECTION_LENGTH.asType(callSiteType)); |
attila@90 | 468 | } else if(Map.class.isAssignableFrom(declaredType)) { |
attila@90 | 469 | return new GuardedInvocationComponent(GET_MAP_LENGTH.asType(callSiteType)); |
attila@90 | 470 | } |
attila@90 | 471 | |
attila@90 | 472 | // Otherwise, create a binding based on the actual type of the argument with an appropriate guard. |
attila@90 | 473 | if(clazz.isArray()) { |
attila@90 | 474 | return new GuardedInvocationComponent(GET_ARRAY_LENGTH.asType(callSiteType), Guards.isArray(0, |
attila@90 | 475 | callSiteType), ValidationType.IS_ARRAY); |
attila@90 | 476 | } if(Collection.class.isAssignableFrom(clazz)) { |
attila@90 | 477 | return new GuardedInvocationComponent(GET_COLLECTION_LENGTH.asType(callSiteType), Guards.asType( |
attila@90 | 478 | COLLECTION_GUARD, callSiteType), Collection.class, ValidationType.INSTANCE_OF); |
attila@90 | 479 | } if(Map.class.isAssignableFrom(clazz)) { |
attila@90 | 480 | return new GuardedInvocationComponent(GET_MAP_LENGTH.asType(callSiteType), Guards.asType(MAP_GUARD, |
attila@90 | 481 | callSiteType), Map.class, ValidationType.INSTANCE_OF); |
attila@90 | 482 | } |
attila@90 | 483 | // Can't retrieve length for objects that are neither arrays, nor collections, nor maps. |
attila@90 | 484 | return null; |
attila@90 | 485 | } |
attila@90 | 486 | |
attila@90 | 487 | private static void assertParameterCount(CallSiteDescriptor descriptor, int paramCount) { |
attila@90 | 488 | if(descriptor.getMethodType().parameterCount() != paramCount) { |
attila@90 | 489 | throw new BootstrapMethodError(descriptor.getName() + " must have exactly " + paramCount + " parameters."); |
attila@90 | 490 | } |
attila@90 | 491 | } |
attila@101 | 492 | } |