| /* |
| * Copyright (c) 2010, 2013, 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 static jdk.nashorn.internal.runtime.ECMAErrors.rangeError; |
| import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; |
| import static jdk.nashorn.internal.runtime.PropertyDescriptor.VALUE; |
| import static jdk.nashorn.internal.runtime.PropertyDescriptor.WRITABLE; |
| import static jdk.nashorn.internal.runtime.arrays.ArrayLikeIterator.arrayLikeIterator; |
| import static jdk.nashorn.internal.runtime.arrays.ArrayLikeIterator.reverseArrayLikeIterator; |
| import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.isValidArrayIndex; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| |
| import jdk.nashorn.api.scripting.JSObject; |
| 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.Setter; |
| import jdk.nashorn.internal.objects.annotations.SpecializedConstructor; |
| import jdk.nashorn.internal.objects.annotations.Where; |
| import jdk.nashorn.internal.runtime.JSType; |
| import jdk.nashorn.internal.runtime.PropertyDescriptor; |
| import jdk.nashorn.internal.runtime.PropertyMap; |
| import jdk.nashorn.internal.runtime.ScriptFunction; |
| import jdk.nashorn.internal.runtime.ScriptObject; |
| import jdk.nashorn.internal.runtime.ScriptRuntime; |
| import jdk.nashorn.internal.runtime.Undefined; |
| import jdk.nashorn.internal.runtime.arrays.ArrayData; |
| import jdk.nashorn.internal.runtime.arrays.ArrayIndex; |
| import jdk.nashorn.internal.runtime.arrays.ArrayLikeIterator; |
| import jdk.nashorn.internal.runtime.arrays.IteratorAction; |
| import jdk.nashorn.internal.runtime.linker.Bootstrap; |
| import jdk.nashorn.internal.runtime.linker.InvokeByName; |
| |
| /** |
| * Runtime representation of a JavaScript array. NativeArray only holds numeric |
| * keyed values. All other values are stored in spill. |
| */ |
| @ScriptClass("Array") |
| public final class NativeArray extends ScriptObject { |
| private static final Object JOIN = new Object(); |
| private static final Object EVERY_CALLBACK_INVOKER = new Object(); |
| private static final Object SOME_CALLBACK_INVOKER = new Object(); |
| private static final Object FOREACH_CALLBACK_INVOKER = new Object(); |
| private static final Object MAP_CALLBACK_INVOKER = new Object(); |
| private static final Object FILTER_CALLBACK_INVOKER = new Object(); |
| private static final Object REDUCE_CALLBACK_INVOKER = new Object(); |
| private static final Object CALL_CMP = new Object(); |
| private static final Object TO_LOCALE_STRING = new Object(); |
| |
| private static InvokeByName getJOIN() { |
| return Global.instance().getInvokeByName(JOIN, |
| new Callable<InvokeByName>() { |
| @Override |
| public InvokeByName call() { |
| return new InvokeByName("join", ScriptObject.class); |
| } |
| }); |
| } |
| |
| private static MethodHandle createIteratorCallbackInvoker(final Object key, final Class<?> rtype) { |
| return Global.instance().getDynamicInvoker(key, |
| new Callable<MethodHandle>() { |
| @Override |
| public MethodHandle call() { |
| return Bootstrap.createDynamicInvoker("dyn:call", rtype, Object.class, Object.class, Object.class, |
| long.class, Object.class); |
| } |
| }); |
| } |
| |
| private static MethodHandle getEVERY_CALLBACK_INVOKER() { |
| return createIteratorCallbackInvoker(EVERY_CALLBACK_INVOKER, boolean.class); |
| } |
| |
| private static MethodHandle getSOME_CALLBACK_INVOKER() { |
| return createIteratorCallbackInvoker(SOME_CALLBACK_INVOKER, boolean.class); |
| } |
| |
| private static MethodHandle getFOREACH_CALLBACK_INVOKER() { |
| return createIteratorCallbackInvoker(FOREACH_CALLBACK_INVOKER, void.class); |
| } |
| |
| private static MethodHandle getMAP_CALLBACK_INVOKER() { |
| return createIteratorCallbackInvoker(MAP_CALLBACK_INVOKER, Object.class); |
| } |
| |
| private static MethodHandle getFILTER_CALLBACK_INVOKER() { |
| return createIteratorCallbackInvoker(FILTER_CALLBACK_INVOKER, boolean.class); |
| } |
| |
| private static MethodHandle getREDUCE_CALLBACK_INVOKER() { |
| return Global.instance().getDynamicInvoker(REDUCE_CALLBACK_INVOKER, |
| new Callable<MethodHandle>() { |
| @Override |
| public MethodHandle call() { |
| return Bootstrap.createDynamicInvoker("dyn:call", Object.class, Object.class, |
| Undefined.class, Object.class, Object.class, long.class, Object.class); |
| } |
| }); |
| } |
| |
| private static MethodHandle getCALL_CMP() { |
| return Global.instance().getDynamicInvoker(CALL_CMP, |
| new Callable<MethodHandle>() { |
| @Override |
| public MethodHandle call() { |
| return Bootstrap.createDynamicInvoker("dyn:call", double.class, |
| ScriptFunction.class, Object.class, Object.class, Object.class); |
| } |
| }); |
| } |
| |
| private static InvokeByName getTO_LOCALE_STRING() { |
| return Global.instance().getInvokeByName(TO_LOCALE_STRING, |
| new Callable<InvokeByName>() { |
| @Override |
| public InvokeByName call() { |
| return new InvokeByName("toLocaleString", ScriptObject.class, String.class); |
| } |
| }); |
| } |
| |
| // initialized by nasgen |
| private static PropertyMap $nasgenmap$; |
| |
| /* |
| * Constructors. |
| */ |
| NativeArray() { |
| this(ArrayData.initialArray()); |
| } |
| |
| NativeArray(final long length) { |
| // TODO assert valid index in long before casting |
| this(ArrayData.allocate((int) length)); |
| } |
| |
| NativeArray(final int[] array) { |
| this(ArrayData.allocate(array)); |
| } |
| |
| NativeArray(final long[] array) { |
| this(ArrayData.allocate(array)); |
| } |
| |
| NativeArray(final double[] array) { |
| this(ArrayData.allocate(array)); |
| } |
| |
| NativeArray(final Object[] array) { |
| this(ArrayData.allocate(array.length)); |
| |
| ArrayData arrayData = this.getArray(); |
| arrayData.ensure(array.length - 1); |
| |
| for (int index = 0; index < array.length; index++) { |
| final Object value = array[index]; |
| |
| if (value == ScriptRuntime.EMPTY) { |
| arrayData = arrayData.delete(index); |
| } else { |
| arrayData = arrayData.set(index, value, false); |
| } |
| } |
| |
| this.setArray(arrayData); |
| } |
| |
| NativeArray(final ArrayData arrayData) { |
| this(arrayData, Global.instance()); |
| } |
| |
| NativeArray(final ArrayData arrayData, final Global global) { |
| super(global.getArrayPrototype(), $nasgenmap$); |
| this.setArray(arrayData); |
| this.setIsArray(); |
| } |
| |
| @Override |
| public String getClassName() { |
| return "Array"; |
| } |
| |
| @Override |
| public Object getLength() { |
| return getArray().length() & JSType.MAX_UINT; |
| } |
| |
| /** |
| * ECMA 15.4.5.1 [[DefineOwnProperty]] ( P, Desc, Throw ) |
| */ |
| @Override |
| public boolean defineOwnProperty(final String key, final Object propertyDesc, final boolean reject) { |
| final PropertyDescriptor desc = toPropertyDescriptor(Global.instance(), propertyDesc); |
| |
| // never be undefined as "length" is always defined and can't be deleted for arrays |
| // Step 1 |
| final PropertyDescriptor oldLenDesc = (PropertyDescriptor) super.getOwnPropertyDescriptor("length"); |
| |
| // Step 2 |
| // get old length and convert to long |
| long oldLen = NativeArray.validLength(oldLenDesc.getValue(), true); |
| |
| // Step 3 |
| if ("length".equals(key)) { |
| // check for length being made non-writable |
| if (desc.has(WRITABLE) && !desc.isWritable()) { |
| setIsLengthNotWritable(); |
| } |
| |
| // Step 3a |
| if (!desc.has(VALUE)) { |
| return super.defineOwnProperty("length", desc, reject); |
| } |
| |
| // Step 3b |
| final PropertyDescriptor newLenDesc = desc; |
| |
| // Step 3c and 3d - get new length and convert to long |
| final long newLen = NativeArray.validLength(newLenDesc.getValue(), true); |
| |
| // Step 3e |
| newLenDesc.setValue(newLen); |
| |
| // Step 3f |
| // increasing array length - just need to set new length value (and attributes if any) and return |
| if (newLen >= oldLen) { |
| return super.defineOwnProperty("length", newLenDesc, reject); |
| } |
| |
| // Step 3g |
| if (!oldLenDesc.isWritable()) { |
| if (reject) { |
| throw typeError("property.not.writable", "length", ScriptRuntime.safeToString(this)); |
| } |
| return false; |
| } |
| |
| // Step 3h and 3i |
| final boolean newWritable = (!newLenDesc.has(WRITABLE) || newLenDesc.isWritable()); |
| if (!newWritable) { |
| newLenDesc.setWritable(true); |
| } |
| |
| // Step 3j and 3k |
| final boolean succeeded = super.defineOwnProperty("length", newLenDesc, reject); |
| if (!succeeded) { |
| return false; |
| } |
| |
| // Step 3l |
| // make sure that length is set till the point we can delete the old elements |
| while (newLen < oldLen) { |
| oldLen--; |
| final boolean deleteSucceeded = delete(oldLen, false); |
| if (!deleteSucceeded) { |
| newLenDesc.setValue(oldLen + 1); |
| if (!newWritable) { |
| newLenDesc.setWritable(false); |
| } |
| super.defineOwnProperty("length", newLenDesc, false); |
| if (reject) { |
| throw typeError("property.not.writable", "length", ScriptRuntime.safeToString(this)); |
| } |
| return false; |
| } |
| } |
| |
| // Step 3m |
| if (!newWritable) { |
| // make 'length' property not writable |
| final ScriptObject newDesc = Global.newEmptyInstance(); |
| newDesc.set(WRITABLE, false, false); |
| return super.defineOwnProperty("length", newDesc, false); |
| } |
| |
| return true; |
| } |
| |
| // Step 4a |
| final int index = ArrayIndex.getArrayIndex(key); |
| if (ArrayIndex.isValidArrayIndex(index)) { |
| final long longIndex = ArrayIndex.toLongIndex(index); |
| // Step 4b |
| // setting an element beyond current length, but 'length' is not writable |
| if (longIndex >= oldLen && !oldLenDesc.isWritable()) { |
| if (reject) { |
| throw typeError("property.not.writable", Long.toString(longIndex), ScriptRuntime.safeToString(this)); |
| } |
| return false; |
| } |
| |
| // Step 4c |
| // set the new array element |
| final boolean succeeded = super.defineOwnProperty(key, desc, false); |
| |
| // Step 4d |
| if (!succeeded) { |
| if (reject) { |
| throw typeError("cant.redefine.property", key, ScriptRuntime.safeToString(this)); |
| } |
| return false; |
| } |
| |
| // Step 4e -- adjust new length based on new element index that is set |
| if (longIndex >= oldLen) { |
| oldLenDesc.setValue(longIndex + 1); |
| super.defineOwnProperty("length", oldLenDesc, false); |
| } |
| |
| // Step 4f |
| return true; |
| } |
| |
| // not an index property |
| return super.defineOwnProperty(key, desc, reject); |
| } |
| |
| /** |
| * Spec. mentions use of [[DefineOwnProperty]] for indexed properties in |
| * certain places (eg. Array.prototype.map, filter). We can not use ScriptObject.set |
| * method in such cases. This is because set method uses inherited setters (if any) |
| * from any object in proto chain such as Array.prototype, Object.prototype. |
| * This method directly sets a particular element value in the current object. |
| * |
| * @param index key for property |
| * @param value value to define |
| */ |
| @Override |
| public final void defineOwnProperty(final int index, final Object value) { |
| assert isValidArrayIndex(index) : "invalid array index"; |
| final long longIndex = ArrayIndex.toLongIndex(index); |
| if (longIndex >= getArray().length()) { |
| // make array big enough to hold.. |
| setArray(getArray().ensure(longIndex)); |
| } |
| setArray(getArray().set(index, value, false)); |
| } |
| |
| /** |
| * Return the array contents upcasted as an ObjectArray, regardless of |
| * representation |
| * |
| * @return an object array |
| */ |
| public Object[] asObjectArray() { |
| return getArray().asObjectArray(); |
| } |
| |
| /** |
| * ECMA 15.4.3.2 Array.isArray ( arg ) |
| * |
| * @param self self reference |
| * @param arg argument - object to check |
| * @return true if argument is an array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR) |
| public static Object isArray(final Object self, final Object arg) { |
| return isArray(arg) || (arg instanceof JSObject && ((JSObject)arg).isArray()); |
| } |
| |
| /** |
| * Length getter |
| * @param self self reference |
| * @return the length of the object |
| */ |
| @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE) |
| public static Object length(final Object self) { |
| if (isArray(self)) { |
| return ((ScriptObject) self).getArray().length() & JSType.MAX_UINT; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Length setter |
| * @param self self reference |
| * @param length new length property |
| */ |
| @Setter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE) |
| public static void length(final Object self, final Object length) { |
| if (isArray(self)) { |
| ((ScriptObject) self).setLength(validLength(length, true)); |
| } |
| } |
| |
| /** |
| * Prototype length getter |
| * @param self self reference |
| * @return the length of the object |
| */ |
| @Getter(name = "length", where = Where.PROTOTYPE, attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE) |
| public static Object getProtoLength(final Object self) { |
| return length(self); // Same as instance getter but we can't make nasgen use the same method for prototype |
| } |
| |
| /** |
| * Prototype length setter |
| * @param self self reference |
| * @param length new length property |
| */ |
| @Setter(name = "length", where = Where.PROTOTYPE, attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE) |
| public static void setProtoLength(final Object self, final Object length) { |
| length(self, length); // Same as instance setter but we can't make nasgen use the same method for prototype |
| } |
| |
| static long validLength(final Object length, final boolean reject) { |
| final double doubleLength = JSType.toNumber(length); |
| if (!Double.isNaN(doubleLength) && JSType.isRepresentableAsLong(doubleLength)) { |
| final long len = (long) doubleLength; |
| if (len >= 0 && len <= JSType.MAX_UINT) { |
| return len; |
| } |
| } |
| if (reject) { |
| throw rangeError("inappropriate.array.length", ScriptRuntime.safeToString(length)); |
| } |
| return -1; |
| } |
| |
| /** |
| * ECMA 15.4.4.2 Array.prototype.toString ( ) |
| * |
| * @param self self reference |
| * @return string representation of array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object toString(final Object self) { |
| final Object obj = Global.toObject(self); |
| if (obj instanceof ScriptObject) { |
| final InvokeByName joinInvoker = getJOIN(); |
| final ScriptObject sobj = (ScriptObject)obj; |
| try { |
| final Object join = joinInvoker.getGetter().invokeExact(sobj); |
| if (Bootstrap.isCallable(join)) { |
| return joinInvoker.getInvoker().invokeExact(join, sobj); |
| } |
| } catch (final RuntimeException | Error e) { |
| throw e; |
| } catch (final Throwable t) { |
| throw new RuntimeException(t); |
| } |
| } |
| |
| // FIXME: should lookup Object.prototype.toString and call that? |
| return ScriptRuntime.builtinObjectToString(self); |
| } |
| |
| /** |
| * ECMA 15.4.4.3 Array.prototype.toLocaleString ( ) |
| * |
| * @param self self reference |
| * @return locale specific string representation for array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object toLocaleString(final Object self) { |
| final StringBuilder sb = new StringBuilder(); |
| final Iterator<Object> iter = arrayLikeIterator(self, true); |
| |
| while (iter.hasNext()) { |
| final Object obj = iter.next(); |
| |
| if (obj != null && obj != ScriptRuntime.UNDEFINED) { |
| final Object val = JSType.toScriptObject(obj); |
| |
| try { |
| if (val instanceof ScriptObject) { |
| final InvokeByName localeInvoker = getTO_LOCALE_STRING(); |
| final ScriptObject sobj = (ScriptObject)val; |
| final Object toLocaleString = localeInvoker.getGetter().invokeExact(sobj); |
| |
| if (Bootstrap.isCallable(toLocaleString)) { |
| sb.append((String)localeInvoker.getInvoker().invokeExact(toLocaleString, sobj)); |
| } else { |
| throw typeError("not.a.function", "toLocaleString"); |
| } |
| } |
| } catch (final Error|RuntimeException t) { |
| throw t; |
| } catch (final Throwable t) { |
| throw new RuntimeException(t); |
| } |
| } |
| |
| if (iter.hasNext()) { |
| sb.append(","); |
| } |
| } |
| |
| return sb.toString(); |
| } |
| |
| /** |
| * ECMA 15.4.2.2 new Array (len) |
| * |
| * @param newObj was the new operator used to instantiate this array |
| * @param self self reference |
| * @param args arguments (length) |
| * @return the new NativeArray |
| */ |
| @Constructor(arity = 1) |
| public static Object construct(final boolean newObj, final Object self, final Object... args) { |
| switch (args.length) { |
| case 0: |
| return new NativeArray(0); |
| case 1: |
| final Object len = args[0]; |
| if (len instanceof Number) { |
| long length; |
| if (len instanceof Integer || len instanceof Long) { |
| length = ((Number) len).longValue(); |
| if (length >= 0 && length < JSType.MAX_UINT) { |
| return new NativeArray(length); |
| } |
| } |
| |
| length = JSType.toUint32(len); |
| |
| /* |
| * If the argument len is a Number and ToUint32(len) is equal to |
| * len, then the length property of the newly constructed object |
| * is set to ToUint32(len). If the argument len is a Number and |
| * ToUint32(len) is not equal to len, a RangeError exception is |
| * thrown. |
| */ |
| final double numberLength = ((Number) len).doubleValue(); |
| if (length != numberLength) { |
| throw rangeError("inappropriate.array.length", JSType.toString(numberLength)); |
| } |
| |
| return new NativeArray(length); |
| } |
| /* |
| * If the argument len is not a Number, then the length property of |
| * the newly constructed object is set to 1 and the 0 property of |
| * the newly constructed object is set to len |
| */ |
| return new NativeArray(new Object[]{args[0]}); |
| //fallthru |
| default: |
| return new NativeArray(args); |
| } |
| } |
| |
| /** |
| * ECMA 15.4.2.2 new Array (len) |
| * |
| * Specialized constructor for zero arguments - empty array |
| * |
| * @param newObj was the new operator used to instantiate this array |
| * @param self self reference |
| * @return the new NativeArray |
| */ |
| @SpecializedConstructor |
| public static Object construct(final boolean newObj, final Object self) { |
| return new NativeArray(0); |
| } |
| |
| /** |
| * ECMA 15.4.2.2 new Array (len) |
| * |
| * Specialized constructor for one integer argument (length) |
| * |
| * @param newObj was the new operator used to instantiate this array |
| * @param self self reference |
| * @param length array length |
| * @return the new NativeArray |
| */ |
| @SpecializedConstructor |
| public static Object construct(final boolean newObj, final Object self, final int length) { |
| if (length >= 0) { |
| return new NativeArray(length); |
| } |
| |
| return construct(newObj, self, new Object[]{length}); |
| } |
| |
| /** |
| * ECMA 15.4.2.2 new Array (len) |
| * |
| * Specialized constructor for one long argument (length) |
| * |
| * @param newObj was the new operator used to instantiate this array |
| * @param self self reference |
| * @param length array length |
| * @return the new NativeArray |
| */ |
| @SpecializedConstructor |
| public static Object construct(final boolean newObj, final Object self, final long length) { |
| if (length >= 0L && length <= JSType.MAX_UINT) { |
| return new NativeArray(length); |
| } |
| |
| return construct(newObj, self, new Object[]{length}); |
| } |
| |
| /** |
| * ECMA 15.4.2.2 new Array (len) |
| * |
| * Specialized constructor for one double argument (length) |
| * |
| * @param newObj was the new operator used to instantiate this array |
| * @param self self reference |
| * @param length array length |
| * @return the new NativeArray |
| */ |
| @SpecializedConstructor |
| public static Object construct(final boolean newObj, final Object self, final double length) { |
| final long uint32length = JSType.toUint32(length); |
| |
| if (uint32length == length) { |
| return new NativeArray(uint32length); |
| } |
| |
| return construct(newObj, self, new Object[]{length}); |
| } |
| |
| /** |
| * ECMA 15.4.4.4 Array.prototype.concat ( [ item1 [ , item2 [ , ... ] ] ] ) |
| * |
| * @param self self reference |
| * @param args arguments to concat |
| * @return resulting NativeArray |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object concat(final Object self, final Object... args) { |
| final ArrayList<Object> list = new ArrayList<>(); |
| concatToList(list, Global.toObject(self)); |
| |
| for (final Object obj : args) { |
| concatToList(list, obj); |
| } |
| |
| return new NativeArray(list.toArray()); |
| } |
| |
| @SuppressWarnings("null") |
| private static void concatToList(final ArrayList<Object> list, final Object obj) { |
| final boolean isScriptArray = isArray(obj); |
| final boolean isScriptObject = isScriptArray || obj instanceof ScriptObject; |
| if (isScriptArray || obj instanceof Iterable || (obj != null && obj.getClass().isArray())) { |
| final Iterator<Object> iter = arrayLikeIterator(obj, true); |
| if (iter.hasNext()) { |
| for (int i = 0; iter.hasNext(); ++i) { |
| final Object value = iter.next(); |
| if (value == ScriptRuntime.UNDEFINED && isScriptObject && !((ScriptObject)obj).has(i)) { |
| // TODO: eventually rewrite arrayLikeIterator to use a three-state enum for handling |
| // UNDEFINED instead of an "includeUndefined" boolean with states SKIP, INCLUDE, |
| // RETURN_EMPTY. Until then, this is how we'll make sure that empty elements don't make it |
| // into the concatenated array. |
| list.add(ScriptRuntime.EMPTY); |
| } else { |
| list.add(value); |
| } |
| } |
| } else if (!isScriptArray) { |
| list.add(obj); // add empty object, but not an empty array |
| } |
| } else { |
| // single element, add it |
| list.add(obj); |
| } |
| } |
| |
| /** |
| * ECMA 15.4.4.5 Array.prototype.join (separator) |
| * |
| * @param self self reference |
| * @param separator element separator |
| * @return string representation after join |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object join(final Object self, final Object separator) { |
| final StringBuilder sb = new StringBuilder(); |
| final Iterator<Object> iter = arrayLikeIterator(self, true); |
| final String sep = separator == ScriptRuntime.UNDEFINED ? "," : JSType.toString(separator); |
| |
| while (iter.hasNext()) { |
| final Object obj = iter.next(); |
| |
| if (obj != null && obj != ScriptRuntime.UNDEFINED) { |
| sb.append(JSType.toString(obj)); |
| } |
| |
| if (iter.hasNext()) { |
| sb.append(sep); |
| } |
| } |
| |
| return sb.toString(); |
| } |
| |
| /** |
| * ECMA 15.4.4.6 Array.prototype.pop () |
| * |
| * @param self self reference |
| * @return array after pop |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object pop(final Object self) { |
| try { |
| final ScriptObject sobj = (ScriptObject)self; |
| |
| if (bulkable(sobj)) { |
| return sobj.getArray().pop(); |
| } |
| |
| final long len = JSType.toUint32(sobj.getLength()); |
| |
| if (len == 0) { |
| sobj.set("length", 0, true); |
| return ScriptRuntime.UNDEFINED; |
| } |
| |
| final long index = len - 1; |
| final Object element = sobj.get(index); |
| |
| sobj.delete(index, true); |
| sobj.set("length", index, true); |
| |
| return element; |
| } catch (final ClassCastException | NullPointerException e) { |
| throw typeError("not.an.object", ScriptRuntime.safeToString(self)); |
| } |
| } |
| |
| /** |
| * ECMA 15.4.4.7 Array.prototype.push (args...) |
| * |
| * @param self self reference |
| * @param args arguments to push |
| * @return array after pushes |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object push(final Object self, final Object... args) { |
| try { |
| final ScriptObject sobj = (ScriptObject)self; |
| |
| if (bulkable(sobj)) { |
| if (sobj.getArray().length() + args.length <= JSType.MAX_UINT) { |
| final ArrayData newData = sobj.getArray().push(true, args); |
| sobj.setArray(newData); |
| return newData.length(); |
| } |
| //fallthru |
| } |
| |
| long len = JSType.toUint32(sobj.getLength()); |
| for (final Object element : args) { |
| sobj.set(len++, element, true); |
| } |
| sobj.set("length", len, true); |
| |
| return len; |
| } catch (final ClassCastException | NullPointerException e) { |
| throw typeError("not.an.object", ScriptRuntime.safeToString(self)); |
| } |
| } |
| |
| /** |
| * ECMA 15.4.4.8 Array.prototype.reverse () |
| * |
| * @param self self reference |
| * @return reversed array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object reverse(final Object self) { |
| try { |
| final ScriptObject sobj = (ScriptObject)self; |
| final long len = JSType.toUint32(sobj.getLength()); |
| final long middle = len / 2; |
| |
| for (long lower = 0; lower != middle; lower++) { |
| final long upper = len - lower - 1; |
| final Object lowerValue = sobj.get(lower); |
| final Object upperValue = sobj.get(upper); |
| final boolean lowerExists = sobj.has(lower); |
| final boolean upperExists = sobj.has(upper); |
| |
| if (lowerExists && upperExists) { |
| sobj.set(lower, upperValue, true); |
| sobj.set(upper, lowerValue, true); |
| } else if (!lowerExists && upperExists) { |
| sobj.set(lower, upperValue, true); |
| sobj.delete(upper, true); |
| } else if (lowerExists && !upperExists) { |
| sobj.delete(lower, true); |
| sobj.set(upper, lowerValue, true); |
| } |
| } |
| return sobj; |
| } catch (final ClassCastException | NullPointerException e) { |
| throw typeError("not.an.object", ScriptRuntime.safeToString(self)); |
| } |
| } |
| |
| /** |
| * ECMA 15.4.4.9 Array.prototype.shift () |
| * |
| * @param self self reference |
| * @return shifted array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object shift(final Object self) { |
| final Object obj = Global.toObject(self); |
| |
| Object first = ScriptRuntime.UNDEFINED; |
| |
| if (!(obj instanceof ScriptObject)) { |
| return first; |
| } |
| |
| final ScriptObject sobj = (ScriptObject) obj; |
| |
| long len = JSType.toUint32(sobj.getLength()); |
| |
| if (len > 0) { |
| first = sobj.get(0); |
| |
| if (bulkable(sobj)) { |
| sobj.getArray().shiftLeft(1); |
| } else { |
| boolean hasPrevious = true; |
| for (long k = 1; k < len; k++) { |
| boolean hasCurrent = sobj.has(k); |
| if (hasCurrent) { |
| sobj.set(k - 1, sobj.get(k), true); |
| } else if (hasPrevious) { |
| sobj.delete(k - 1, true); |
| } |
| hasPrevious = hasCurrent; |
| } |
| } |
| sobj.delete(--len, true); |
| } else { |
| len = 0; |
| } |
| |
| sobj.set("length", len, true); |
| |
| return first; |
| } |
| |
| /** |
| * ECMA 15.4.4.10 Array.prototype.slice ( start [ , end ] ) |
| * |
| * @param self self reference |
| * @param start start of slice (inclusive) |
| * @param end end of slice (optional, exclusive) |
| * @return sliced array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object slice(final Object self, final Object start, final Object end) { |
| final Object obj = Global.toObject(self); |
| if (!(obj instanceof ScriptObject)) { |
| return ScriptRuntime.UNDEFINED; |
| } |
| |
| final ScriptObject sobj = (ScriptObject)obj; |
| final long len = JSType.toUint32(sobj.getLength()); |
| final long relativeStart = JSType.toLong(start); |
| final long relativeEnd = (end == ScriptRuntime.UNDEFINED) ? len : JSType.toLong(end); |
| |
| long k = relativeStart < 0 ? Math.max(len + relativeStart, 0) : Math.min(relativeStart, len); |
| final long finale = relativeEnd < 0 ? Math.max(len + relativeEnd, 0) : Math.min(relativeEnd, len); |
| |
| if (k >= finale) { |
| return new NativeArray(0); |
| } |
| |
| if (bulkable(sobj)) { |
| return new NativeArray(sobj.getArray().slice(k, finale)); |
| } |
| |
| // Construct array with proper length to have a deleted filter on undefined elements |
| final NativeArray copy = new NativeArray(finale - k); |
| for (long n = 0; k < finale; n++, k++) { |
| if (sobj.has(k)) { |
| copy.defineOwnProperty(ArrayIndex.getArrayIndex(n), sobj.get(k)); |
| } |
| } |
| |
| return copy; |
| } |
| |
| private static ScriptFunction compareFunction(final Object comparefn) { |
| if (comparefn == ScriptRuntime.UNDEFINED) { |
| return null; |
| } |
| |
| if (! (comparefn instanceof ScriptFunction)) { |
| throw typeError("not.a.function", ScriptRuntime.safeToString(comparefn)); |
| } |
| |
| return (ScriptFunction)comparefn; |
| } |
| |
| private static Object[] sort(final Object[] array, final Object comparefn) { |
| final ScriptFunction cmp = compareFunction(comparefn); |
| |
| final List<Object> list = Arrays.asList(array); |
| final Object cmpThis = cmp == null || cmp.isStrict() ? ScriptRuntime.UNDEFINED : Global.instance(); |
| |
| Collections.sort(list, new Comparator<Object>() { |
| private final MethodHandle call_cmp = getCALL_CMP(); |
| @Override |
| public int compare(final Object x, final Object y) { |
| if (x == ScriptRuntime.UNDEFINED && y == ScriptRuntime.UNDEFINED) { |
| return 0; |
| } else if (x == ScriptRuntime.UNDEFINED) { |
| return 1; |
| } else if (y == ScriptRuntime.UNDEFINED) { |
| return -1; |
| } |
| |
| if (cmp != null) { |
| try { |
| return (int)Math.signum((double)call_cmp.invokeExact(cmp, cmpThis, x, y)); |
| } catch (final RuntimeException | Error e) { |
| throw e; |
| } catch (final Throwable t) { |
| throw new RuntimeException(t); |
| } |
| } |
| |
| return JSType.toString(x).compareTo(JSType.toString(y)); |
| } |
| }); |
| |
| return list.toArray(new Object[array.length]); |
| } |
| |
| /** |
| * ECMA 15.4.4.11 Array.prototype.sort ( comparefn ) |
| * |
| * @param self self reference |
| * @param comparefn element comparison function |
| * @return sorted array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object sort(final Object self, final Object comparefn) { |
| try { |
| final ScriptObject sobj = (ScriptObject) self; |
| final long len = JSType.toUint32(sobj.getLength()); |
| ArrayData array = sobj.getArray(); |
| |
| if (len > 1) { |
| // Get only non-missing elements. Missing elements go at the end |
| // of the sorted array. So, just don't copy these to sort input. |
| final ArrayList<Object> src = new ArrayList<>(); |
| for (long i = 0; i < len; i = array.nextIndex(i)) { |
| if (array.has((int) i)) { |
| src.add(array.getObject((int) i)); |
| } |
| } |
| |
| final Object[] sorted = sort(src.toArray(), comparefn); |
| |
| for (int i = 0; i < sorted.length; i++) { |
| array = array.set(i, sorted[i], true); |
| } |
| |
| // delete missing elements - which are at the end of sorted array |
| if (sorted.length != len) { |
| array = array.delete(sorted.length, len - 1); |
| } |
| |
| sobj.setArray(array); |
| } |
| |
| return sobj; |
| } catch (final ClassCastException | NullPointerException e) { |
| throw typeError("not.an.object", ScriptRuntime.safeToString(self)); |
| } |
| } |
| |
| /** |
| * ECMA 15.4.4.12 Array.prototype.splice ( start, deleteCount [ item1 [ , item2 [ , ... ] ] ] ) |
| * |
| * @param self self reference |
| * @param args arguments |
| * @return result of splice |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 2) |
| public static Object splice(final Object self, final Object... args) { |
| final Object obj = Global.toObject(self); |
| |
| if (!(obj instanceof ScriptObject)) { |
| return ScriptRuntime.UNDEFINED; |
| } |
| |
| final Object start = (args.length > 0) ? args[0] : ScriptRuntime.UNDEFINED; |
| final Object deleteCount = (args.length > 1) ? args[1] : ScriptRuntime.UNDEFINED; |
| |
| Object[] items; |
| |
| if (args.length > 2) { |
| items = new Object[args.length - 2]; |
| System.arraycopy(args, 2, items, 0, items.length); |
| } else { |
| items = ScriptRuntime.EMPTY_ARRAY; |
| } |
| |
| final ScriptObject sobj = (ScriptObject)obj; |
| final long len = JSType.toUint32(sobj.getLength()); |
| final long relativeStart = JSType.toLong(start); |
| |
| final long actualStart = relativeStart < 0 ? Math.max(len + relativeStart, 0) : Math.min(relativeStart, len); |
| final long actualDeleteCount = Math.min(Math.max(JSType.toLong(deleteCount), 0), len - actualStart); |
| |
| NativeArray returnValue; |
| |
| if (actualStart <= Integer.MAX_VALUE && actualDeleteCount <= Integer.MAX_VALUE && bulkable(sobj)) { |
| try { |
| returnValue = new NativeArray(sobj.getArray().fastSplice((int)actualStart, (int)actualDeleteCount, items.length)); |
| |
| // Since this is a dense bulkable array we can use faster defineOwnProperty to copy new elements |
| int k = (int) actualStart; |
| for (int i = 0; i < items.length; i++, k++) { |
| sobj.defineOwnProperty(k, items[i]); |
| } |
| } catch (UnsupportedOperationException uoe) { |
| returnValue = slowSplice(sobj, actualStart, actualDeleteCount, items, len); |
| } |
| } else { |
| returnValue = slowSplice(sobj, actualStart, actualDeleteCount, items, len); |
| } |
| |
| return returnValue; |
| } |
| |
| private static NativeArray slowSplice(final ScriptObject sobj, final long start, final long deleteCount, final Object[] items, final long len) { |
| |
| final NativeArray array = new NativeArray(deleteCount); |
| |
| for (long k = 0; k < deleteCount; k++) { |
| final long from = start + k; |
| |
| if (sobj.has(from)) { |
| array.defineOwnProperty(ArrayIndex.getArrayIndex(k), sobj.get(from)); |
| } |
| } |
| |
| if (items.length < deleteCount) { |
| for (long k = start; k < (len - deleteCount); k++) { |
| final long from = k + deleteCount; |
| final long to = k + items.length; |
| |
| if (sobj.has(from)) { |
| sobj.set(to, sobj.get(from), true); |
| } else { |
| sobj.delete(to, true); |
| } |
| } |
| |
| for (long k = len; k > (len - deleteCount + items.length); k--) { |
| sobj.delete(k - 1, true); |
| } |
| } else if (items.length > deleteCount) { |
| for (long k = len - deleteCount; k > start; k--) { |
| final long from = k + deleteCount - 1; |
| final long to = k + items.length - 1; |
| |
| if (sobj.has(from)) { |
| final Object fromValue = sobj.get(from); |
| sobj.set(to, fromValue, true); |
| } else { |
| sobj.delete(to, true); |
| } |
| } |
| } |
| |
| long k = start; |
| for (int i = 0; i < items.length; i++, k++) { |
| sobj.set(k, items[i], true); |
| } |
| |
| final long newLength = len - deleteCount + items.length; |
| sobj.set("length", newLength, true); |
| |
| return array; |
| } |
| |
| /** |
| * ECMA 15.4.4.13 Array.prototype.unshift ( [ item1 [ , item2 [ , ... ] ] ] ) |
| * |
| * @param self self reference |
| * @param items items for unshift |
| * @return unshifted array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object unshift(final Object self, final Object... items) { |
| final Object obj = Global.toObject(self); |
| |
| if (!(obj instanceof ScriptObject)) { |
| return ScriptRuntime.UNDEFINED; |
| } |
| |
| final ScriptObject sobj = (ScriptObject)obj; |
| final long len = JSType.toUint32(sobj.getLength()); |
| |
| if (items == null) { |
| return ScriptRuntime.UNDEFINED; |
| } |
| |
| if (bulkable(sobj)) { |
| sobj.getArray().shiftRight(items.length); |
| |
| for (int j = 0; j < items.length; j++) { |
| sobj.setArray(sobj.getArray().set(j, items[j], true)); |
| } |
| } else { |
| for (long k = len; k > 0; k--) { |
| final long from = k - 1; |
| final long to = k + items.length - 1; |
| |
| if (sobj.has(from)) { |
| final Object fromValue = sobj.get(from); |
| sobj.set(to, fromValue, true); |
| } else { |
| sobj.delete(to, true); |
| } |
| } |
| |
| for (int j = 0; j < items.length; j++) { |
| sobj.set(j, items[j], true); |
| } |
| } |
| |
| final long newLength = len + items.length; |
| sobj.set("length", newLength, true); |
| |
| return newLength; |
| } |
| |
| /** |
| * ECMA 15.4.4.14 Array.prototype.indexOf ( searchElement [ , fromIndex ] ) |
| * |
| * @param self self reference |
| * @param searchElement element to search for |
| * @param fromIndex start index of search |
| * @return index of element, or -1 if not found |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object indexOf(final Object self, final Object searchElement, final Object fromIndex) { |
| try { |
| final ScriptObject sobj = (ScriptObject)Global.toObject(self); |
| final long len = JSType.toUint32(sobj.getLength()); |
| if (len == 0) { |
| return -1; |
| } |
| |
| final long n = JSType.toLong(fromIndex); |
| if (n >= len) { |
| return -1; |
| } |
| |
| |
| for (long k = Math.max(0, (n < 0) ? (len - Math.abs(n)) : n); k < len; k++) { |
| if (sobj.has(k)) { |
| if (ScriptRuntime.EQ_STRICT(sobj.get(k), searchElement)) { |
| return k; |
| } |
| } |
| } |
| } catch (final ClassCastException | NullPointerException e) { |
| //fallthru |
| } |
| |
| return -1; |
| } |
| |
| /** |
| * ECMA 15.4.4.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] ) |
| * |
| * @param self self reference |
| * @param args arguments: element to search for and optional from index |
| * @return index of element, or -1 if not found |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object lastIndexOf(final Object self, final Object... args) { |
| try { |
| final ScriptObject sobj = (ScriptObject)Global.toObject(self); |
| final long len = JSType.toUint32(sobj.getLength()); |
| |
| if (len == 0) { |
| return -1; |
| } |
| |
| final Object searchElement = (args.length > 0) ? args[0] : ScriptRuntime.UNDEFINED; |
| final long n = (args.length > 1) ? JSType.toLong(args[1]) : (len - 1); |
| |
| for (long k = (n < 0) ? (len - Math.abs(n)) : Math.min(n, len - 1); k >= 0; k--) { |
| if (sobj.has(k)) { |
| if (ScriptRuntime.EQ_STRICT(sobj.get(k), searchElement)) { |
| return k; |
| } |
| } |
| } |
| } catch (final ClassCastException | NullPointerException e) { |
| throw typeError("not.an.object", ScriptRuntime.safeToString(self)); |
| } |
| |
| return -1; |
| } |
| |
| /** |
| * ECMA 15.4.4.16 Array.prototype.every ( callbackfn [ , thisArg ] ) |
| * |
| * @param self self reference |
| * @param callbackfn callback function per element |
| * @param thisArg this argument |
| * @return true if callback function return true for every element in the array, false otherwise |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object every(final Object self, final Object callbackfn, final Object thisArg) { |
| return applyEvery(Global.toObject(self), callbackfn, thisArg); |
| } |
| |
| private static boolean applyEvery(final Object self, final Object callbackfn, final Object thisArg) { |
| return new IteratorAction<Boolean>(Global.toObject(self), callbackfn, thisArg, true) { |
| private final MethodHandle everyInvoker = getEVERY_CALLBACK_INVOKER(); |
| |
| @Override |
| protected boolean forEach(final Object val, final long i) throws Throwable { |
| return (result = (boolean)everyInvoker.invokeExact(callbackfn, thisArg, val, i, self)); |
| } |
| }.apply(); |
| } |
| |
| /** |
| * ECMA 15.4.4.17 Array.prototype.some ( callbackfn [ , thisArg ] ) |
| * |
| * @param self self reference |
| * @param callbackfn callback function per element |
| * @param thisArg this argument |
| * @return true if callback function returned true for any element in the array, false otherwise |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object some(final Object self, final Object callbackfn, final Object thisArg) { |
| return new IteratorAction<Boolean>(Global.toObject(self), callbackfn, thisArg, false) { |
| private final MethodHandle someInvoker = getSOME_CALLBACK_INVOKER(); |
| |
| @Override |
| protected boolean forEach(final Object val, final long i) throws Throwable { |
| return !(result = (boolean)someInvoker.invokeExact(callbackfn, thisArg, val, i, self)); |
| } |
| }.apply(); |
| } |
| |
| /** |
| * ECMA 15.4.4.18 Array.prototype.forEach ( callbackfn [ , thisArg ] ) |
| * |
| * @param self self reference |
| * @param callbackfn callback function per element |
| * @param thisArg this argument |
| * @return undefined |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object forEach(final Object self, final Object callbackfn, final Object thisArg) { |
| return new IteratorAction<Object>(Global.toObject(self), callbackfn, thisArg, ScriptRuntime.UNDEFINED) { |
| private final MethodHandle forEachInvoker = getFOREACH_CALLBACK_INVOKER(); |
| |
| @Override |
| protected boolean forEach(final Object val, final long i) throws Throwable { |
| forEachInvoker.invokeExact(callbackfn, thisArg, val, i, self); |
| return true; |
| } |
| }.apply(); |
| } |
| |
| /** |
| * ECMA 15.4.4.19 Array.prototype.map ( callbackfn [ , thisArg ] ) |
| * |
| * @param self self reference |
| * @param callbackfn callback function per element |
| * @param thisArg this argument |
| * @return array with elements transformed by map function |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object map(final Object self, final Object callbackfn, final Object thisArg) { |
| return new IteratorAction<NativeArray>(Global.toObject(self), callbackfn, thisArg, null) { |
| private final MethodHandle mapInvoker = getMAP_CALLBACK_INVOKER(); |
| |
| @Override |
| protected boolean forEach(final Object val, final long i) throws Throwable { |
| final Object r = mapInvoker.invokeExact(callbackfn, thisArg, val, i, self); |
| result.defineOwnProperty(ArrayIndex.getArrayIndex(index), r); |
| return true; |
| } |
| |
| @Override |
| public void applyLoopBegin(final ArrayLikeIterator<Object> iter0) { |
| // map return array should be of same length as source array |
| // even if callback reduces source array length |
| result = new NativeArray(iter0.getLength()); |
| } |
| }.apply(); |
| } |
| |
| /** |
| * ECMA 15.4.4.20 Array.prototype.filter ( callbackfn [ , thisArg ] ) |
| * |
| * @param self self reference |
| * @param callbackfn callback function per element |
| * @param thisArg this argument |
| * @return filtered array |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object filter(final Object self, final Object callbackfn, final Object thisArg) { |
| return new IteratorAction<NativeArray>(Global.toObject(self), callbackfn, thisArg, new NativeArray()) { |
| private long to = 0; |
| private final MethodHandle filterInvoker = getFILTER_CALLBACK_INVOKER(); |
| |
| @Override |
| protected boolean forEach(final Object val, final long i) throws Throwable { |
| if ((boolean)filterInvoker.invokeExact(callbackfn, thisArg, val, i, self)) { |
| result.defineOwnProperty(ArrayIndex.getArrayIndex(to++), val); |
| } |
| return true; |
| } |
| }.apply(); |
| } |
| |
| private static Object reduceInner(final ArrayLikeIterator<Object> iter, final Object self, final Object... args) { |
| final Object callbackfn = args.length > 0 ? args[0] : ScriptRuntime.UNDEFINED; |
| final boolean initialValuePresent = args.length > 1; |
| |
| Object initialValue = initialValuePresent ? args[1] : ScriptRuntime.UNDEFINED; |
| |
| if (callbackfn == ScriptRuntime.UNDEFINED) { |
| throw typeError("not.a.function", "undefined"); |
| } |
| |
| if (!initialValuePresent) { |
| if (iter.hasNext()) { |
| initialValue = iter.next(); |
| } else { |
| throw typeError("array.reduce.invalid.init"); |
| } |
| } |
| |
| //if initial value is ScriptRuntime.UNDEFINED - step forward once. |
| return new IteratorAction<Object>(Global.toObject(self), callbackfn, ScriptRuntime.UNDEFINED, initialValue, iter) { |
| private final MethodHandle reduceInvoker = getREDUCE_CALLBACK_INVOKER(); |
| |
| @Override |
| protected boolean forEach(final Object val, final long i) throws Throwable { |
| // TODO: why can't I declare the second arg as Undefined.class? |
| result = reduceInvoker.invokeExact(callbackfn, ScriptRuntime.UNDEFINED, result, val, i, self); |
| return true; |
| } |
| }.apply(); |
| } |
| |
| /** |
| * ECMA 15.4.4.21 Array.prototype.reduce ( callbackfn [ , initialValue ] ) |
| * |
| * @param self self reference |
| * @param args arguments to reduce |
| * @return accumulated result |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object reduce(final Object self, final Object... args) { |
| return reduceInner(arrayLikeIterator(self), self, args); |
| } |
| |
| /** |
| * ECMA 15.4.4.22 Array.prototype.reduceRight ( callbackfn [ , initialValue ] ) |
| * |
| * @param self self reference |
| * @param args arguments to reduce |
| * @return accumulated result |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1) |
| public static Object reduceRight(final Object self, final Object... args) { |
| return reduceInner(reverseArrayLikeIterator(self), self, args); |
| } |
| |
| /** |
| * Determine if Java bulk array operations may be used on the underlying |
| * storage. This is possible only if the object's prototype chain is empty |
| * or each of the prototypes in the chain is empty. |
| * |
| * @param self the object to examine |
| * @return true if optimizable |
| */ |
| private static boolean bulkable(final ScriptObject self) { |
| return self.isArray() && !hasInheritedArrayEntries(self) && !self.isLengthNotWritable(); |
| } |
| |
| private static boolean hasInheritedArrayEntries(final ScriptObject self) { |
| ScriptObject proto = self.getProto(); |
| while (proto != null) { |
| if (proto.hasArrayEntries()) { |
| return true; |
| } |
| proto = proto.getProto(); |
| } |
| |
| return false; |
| } |
| } |
