--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeMap.java 2020-04-15 18:48:45.000000000 +0530 +++ /dev/null 2020-04-15 18:48:46.000000000 +0530 @@ -1,287 +0,0 @@ -/* - * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -package jdk.nashorn.internal.objects; - -import java.lang.invoke.MethodHandle; - -import jdk.nashorn.internal.objects.annotations.Attribute; -import jdk.nashorn.internal.objects.annotations.Constructor; -import jdk.nashorn.internal.objects.annotations.Function; -import jdk.nashorn.internal.objects.annotations.Getter; -import jdk.nashorn.internal.objects.annotations.ScriptClass; -import jdk.nashorn.internal.objects.annotations.Where; -import jdk.nashorn.internal.runtime.ConsString; -import jdk.nashorn.internal.runtime.JSType; -import jdk.nashorn.internal.runtime.PropertyMap; -import jdk.nashorn.internal.runtime.ScriptObject; -import jdk.nashorn.internal.runtime.ScriptRuntime; -import jdk.nashorn.internal.runtime.Undefined; -import jdk.nashorn.internal.runtime.linker.Bootstrap; - -import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; - -/** - * This implements the ECMA6 Map object. - */ -@ScriptClass("Map") -public class NativeMap extends ScriptObject { - - // our underlying map - private final LinkedMap map = new LinkedMap(); - - // key for the forEach invoker callback - private final static Object FOREACH_INVOKER_KEY = new Object(); - - // initialized by nasgen - private static PropertyMap $nasgenmap$; - - private NativeMap(final ScriptObject proto, final PropertyMap map) { - super(proto, map); - } - - /** - * ECMA6 23.1.1 The Map Constructor - * - * @param isNew is this called with the new operator? - * @param self self reference - * @param arg optional iterable argument - * @return a new Map instance - */ - @Constructor(arity = 0) - public static Object construct(final boolean isNew, final Object self, final Object arg) { - if (!isNew) { - throw typeError("constructor.requires.new", "Map"); - } - final Global global = Global.instance(); - final NativeMap map = new NativeMap(global.getMapPrototype(), $nasgenmap$); - populateMap(map.getJavaMap(), arg, global); - return map; - } - - /** - * ECMA6 23.1.3.1 Map.prototype.clear ( ) - * - * @param self the self reference - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static void clear(final Object self) { - getNativeMap(self).map.clear(); - } - - /** - * ECMA6 23.1.3.3 Map.prototype.delete ( key ) - * - * @param self the self reference - * @param key the key to delete - * @return true if the key was deleted - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static boolean delete(final Object self, final Object key) { - return getNativeMap(self).map.delete(convertKey(key)); - } - - /** - * ECMA6 23.1.3.7 Map.prototype.has ( key ) - * - * @param self the self reference - * @param key the key - * @return true if key is contained - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static boolean has(final Object self, final Object key) { - return getNativeMap(self).map.has(convertKey(key)); - } - - /** - * ECMA6 23.1.3.9 Map.prototype.set ( key , value ) - * - * @param self the self reference - * @param key the key - * @param value the value - * @return this Map object - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static Object set(final Object self, final Object key, final Object value) { - getNativeMap(self).map.set(convertKey(key), value); - return self; - } - - /** - * ECMA6 23.1.3.6 Map.prototype.get ( key ) - * - * @param self the self reference - * @param key the key - * @return the associated value or undefined - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static Object get(final Object self, final Object key) { - return getNativeMap(self).map.get(convertKey(key)); - } - - /** - * ECMA6 23.1.3.10 get Map.prototype.size - * - * @param self the self reference - * @return the size of the map - */ - @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.IS_ACCESSOR, where = Where.PROTOTYPE) - public static int size(final Object self) { - return getNativeMap(self).map.size(); - } - - /** - * ECMA6 23.1.3.4 Map.prototype.entries ( ) - * - * @param self the self reference - * @return an iterator over the Map's entries - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static Object entries(final Object self) { - return new MapIterator(getNativeMap(self), AbstractIterator.IterationKind.KEY_VALUE, Global.instance()); - } - - /** - * ECMA6 23.1.3.8 Map.prototype.keys ( ) - * - * @param self the self reference - * @return an iterator over the Map's keys - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static Object keys(final Object self) { - return new MapIterator(getNativeMap(self), AbstractIterator.IterationKind.KEY, Global.instance()); - } - - /** - * ECMA6 23.1.3.11 Map.prototype.values ( ) - * - * @param self the self reference - * @return an iterator over the Map's values - */ - @Function(attributes = Attribute.NOT_ENUMERABLE) - public static Object values(final Object self) { - return new MapIterator(getNativeMap(self), AbstractIterator.IterationKind.VALUE, Global.instance()); - } - - /** - * ECMA6 23.1.3.12 Map.prototype [ @@iterator ]( ) - * - * @param self the self reference - * @return An iterator over the Map's entries - */ - @Function(attributes = Attribute.NOT_ENUMERABLE, name = "@@iterator") - public static Object getIterator(final Object self) { - return new MapIterator(getNativeMap(self), AbstractIterator.IterationKind.KEY_VALUE, Global.instance()); - } - - /** - * - * @param self the self reference - * @param callbackFn the callback function - * @param thisArg optional this-object - */ - @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) - public static void forEach(final Object self, final Object callbackFn, final Object thisArg) { - final NativeMap map = getNativeMap(self); - if (!Bootstrap.isCallable(callbackFn)) { - throw typeError("not.a.function", ScriptRuntime.safeToString(callbackFn)); - } - final MethodHandle invoker = Global.instance().getDynamicInvoker(FOREACH_INVOKER_KEY, - () -> Bootstrap.createDynamicCallInvoker(Object.class, Object.class, Object.class, Object.class, Object.class, Object.class)); - - final LinkedMap.LinkedMapIterator iterator = map.getJavaMap().getIterator(); - for (;;) { - final LinkedMap.Node node = iterator.next(); - if (node == null) { - break; - } - - try { - final Object result = invoker.invokeExact(callbackFn, thisArg, node.getValue(), node.getKey(), self); - } catch (final RuntimeException | Error e) { - throw e; - } catch (final Throwable t) { - throw new RuntimeException(t); - } - } - } - - @Override - public String getClassName() { - return "Map"; - } - - static void populateMap(final LinkedMap map, final Object arg, final Global global) { - if (arg != null && arg != Undefined.getUndefined()) { - AbstractIterator.iterate(arg, global, value -> { - if (JSType.isPrimitive(value)) { - throw typeError(global, "not.an.object", ScriptRuntime.safeToString(value)); - } - if (value instanceof ScriptObject) { - final ScriptObject sobj = (ScriptObject) value; - map.set(convertKey(sobj.get(0)), sobj.get(1)); - } - }); - } - } - - /** - * Returns a canonicalized key object by converting numbers to their narrowest representation and - * ConsStrings to strings. Conversion of Double to Integer also takes care of converting -0 to 0 - * as required by step 6 of ECMA6 23.1.3.9. - * - * @param key a key - * @return the canonical key - */ - static Object convertKey(final Object key) { - if (key instanceof ConsString) { - return key.toString(); - } - if (key instanceof Double) { - final Double d = (Double) key; - if (JSType.isRepresentableAsInt(d.doubleValue())) { - return d.intValue(); - } - } - return key; - } - - /** - * Get the underlying Java map. - * @return the Java map - */ - LinkedMap getJavaMap() { - return map; - } - - private static NativeMap getNativeMap(final Object self) { - if (self instanceof NativeMap) { - return (NativeMap)self; - } else { - throw typeError("not.a.map", ScriptRuntime.safeToString(self)); - } - } - -}