/*
* 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
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*/
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.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.objects.NativeMap.convertKey;
import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
/**
* This implements the ECMA6 Set object.
*/
@ScriptClass("Set")
public class NativeSet extends ScriptObject {
// our set/map implementation
private final LinkedMap map = new LinkedMap();
// Invoker for the forEach callback
private final static Object FOREACH_INVOKER_KEY = new Object();
// initialized by nasgen
private static PropertyMap $nasgenmap$;
private NativeSet(final ScriptObject proto, final PropertyMap map) {
super(proto, map);
}
/**
* ECMA6 23.1 Set constructor
*
* @param isNew whether the new operator used
* @param self self reference
* @param arg optional iterable argument
* @return a new Set object
*/
@Constructor(arity = 0)
public static Object construct(final boolean isNew, final Object self, final Object arg){
if (!isNew) {
throw typeError("constructor.requires.new", "Set");
}
final Global global = Global.instance();
final NativeSet set = new NativeSet(global.getSetPrototype(), $nasgenmap$);
populateSet(set.getJavaMap(), arg, global);
return set;
}
/**
* ECMA6 23.2.3.1 Set.prototype.add ( value )
*
* @param self the self reference
* @param value the value to add
* @return this Set object
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static Object add(final Object self, final Object value) {
getNativeSet(self).map.set(convertKey(value), null);
return self;
}
/**
* ECMA6 23.2.3.7 Set.prototype.has ( value )
*
* @param self the self reference
* @param value the value
* @return true if value is contained
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static boolean has(final Object self, final Object value) {
return getNativeSet(self).map.has(convertKey(value));
}
/**
* ECMA6 23.2.3.2 Set.prototype.clear ( )
*
* @param self the self reference
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static void clear(final Object self) {
getNativeSet(self).map.clear();
}
/**
* ECMA6 23.2.3.4 Set.prototype.delete ( value )
*
* @param self the self reference
* @param value the value
* @return true if value was deleted
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static boolean delete(final Object self, final Object value) {
return getNativeSet(self).map.delete(convertKey(value));
}
/**
* ECMA6 23.2.3.9 get Set.prototype.size
*
* @param self the self reference
* @return the number of contained values
*/
@Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.IS_ACCESSOR, where = Where.PROTOTYPE)
public static int size(final Object self) {
return getNativeSet(self).map.size();
}
/**
* ECMA6 23.2.3.5 Set.prototype.entries ( )
*
* @param self the self reference
* @return an iterator over the Set object's entries
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static Object entries(final Object self) {
return new SetIterator(getNativeSet(self), AbstractIterator.IterationKind.KEY_VALUE, Global.instance());
}
/**
* ECMA6 23.2.3.8 Set.prototype.keys ( )
*
* @param self the self reference
* @return an iterator over the Set object's values
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static Object keys(final Object self) {
return new SetIterator(getNativeSet(self), AbstractIterator.IterationKind.KEY, Global.instance());
}
/**
* ECMA6 23.2.3.10 Set.prototype.values ( )
*
* @param self the self reference
* @return an iterator over the Set object's values
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static Object values(final Object self) {
return new SetIterator(getNativeSet(self), AbstractIterator.IterationKind.VALUE, Global.instance());
}
/**
* ECMA6 23.2.3.11 Set.prototype [ @@iterator ] ( )
*
* @param self the self reference
* @return an iterator over the Set object's values
*/
@Function(attributes = Attribute.NOT_ENUMERABLE, name = "@@iterator")
public static Object getIterator(final Object self) {
return new SetIterator(getNativeSet(self), AbstractIterator.IterationKind.VALUE, Global.instance());
}
/**
* ECMA6 23.2.3.6 Set.prototype.forEach ( callbackfn [ , thisArg ] )
*
* @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 NativeSet set = getNativeSet(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 = set.getJavaMap().getIterator();
for (;;) {
final LinkedMap.Node node = iterator.next();
if (node == null) {
break;
}
try {
final Object result = invoker.invokeExact(callbackFn, thisArg, node.getKey(), node.getKey(), self);
} catch (final RuntimeException | Error e) {
throw e;
} catch (final Throwable t) {
throw new RuntimeException(t);
}
}
}
@Override
public String getClassName() {
return "Set";
}
static void populateSet(final LinkedMap map, final Object arg, final Global global) {
if (arg != null && arg != Undefined.getUndefined()) {
AbstractIterator.iterate(arg, global, value -> map.set(convertKey(value), null));
}
}
LinkedMap getJavaMap() {
return map;
}
private static NativeSet getNativeSet(final Object self) {
if (self instanceof NativeSet) {
return (NativeSet) self;
} else {
throw typeError("not.a.set", ScriptRuntime.safeToString(self));
}
}
}