Java example source code file (NativeArray.java)
The NativeArray.java Java example source code/*
* 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 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 $nasgenmap$;
static PropertyMap getInitialMap() {
return $nasgenmap$;
}
/*
* 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(), global.getArrayMap());
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);
}
/**
* 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;
}
}
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