Java ArrayIndex类代码示例

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
/**
 * 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 NativeArray 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();
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
/**
 * 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 NativeArray 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();
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
/**
 * 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 NativeArray 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 double 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();
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
/**
 * 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 NativeArray 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 double i) throws Throwable {
            if ((boolean)filterInvoker.invokeExact(callbackfn, thisArg, val, i, self)) {
                result.defineOwnProperty(ArrayIndex.getArrayIndex(to++), val);
            }
            return true;
        }
    }.apply();
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
@Override
public void populateRange(final MethodEmitter method, final Type objectType, final int objectSlot, final int start, final int end) {
    method.load(objectType, objectSlot);
    // Set values.
    for (int i = start; i < end; i++) {
        final MapTuple<T> tuple = tuples.get(i);
        //we only load when we have both symbols and values (which can be == the symbol)
        //if we didn't load, we need an array property
        if (tuple.symbol != null && tuple.value != null) {
            final int index = getArrayIndex(tuple.key);
            method.dup();
            if (!isValidArrayIndex(index)) {
                putField(method, tuple.key, tuple.symbol.getFieldIndex(), tuple);
            } else {
                putSlot(method, ArrayIndex.toLongIndex(index), tuple);
            }

            //this is a nop of tuple.key isn't e.g. "apply" or another special name
            method.invalidateSpecialName(tuple.key);
        }
    }
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
@SuppressWarnings("unused")
private static Object get(final Object self, final Object key) {
    final CharSequence cs = JSType.toCharSequence(self);
    final Object primitiveKey = JSType.toPrimitive(key, String.class);
    final int index = ArrayIndex.getArrayIndex(primitiveKey);
    if (index >= 0 && index < cs.length()) {
        return String.valueOf(cs.charAt(index));
    }
    return ((ScriptObject) Global.toObject(self)).get(primitiveKey);
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
@Override
public Object getOwnPropertyDescriptor(final String key) {
    final int index = ArrayIndex.getArrayIndex(key);
    if (index >= 0 && index < value.length()) {
        final Global global = Global.instance();
        return global.newDataDescriptor(String.valueOf(value.charAt(index)), false, true, false);
    }

    return super.getOwnPropertyDescriptor(key);
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
/**
 * ECMA 15.4.5.1 [[DefineOwnProperty]] ( P, Desc, Throw ) as specialized in
 * ECMA 10.6 for Arguments object.
 */
@Override
public boolean defineOwnProperty(final String key, final Object propertyDesc, final boolean reject) {
    final int index = ArrayIndex.getArrayIndex(key);
    if (index >= 0) {
        final boolean isMapped = isMapped(index);
        final Object oldValue = isMapped ? getArray().getObject(index) : null;

        if (!super.defineOwnProperty(key, propertyDesc, false)) {
            if (reject) {
                throw typeError("cant.redefine.property",  key, ScriptRuntime.safeToString(this));
            }
            return false;
        }

        if (isMapped) {
            // When mapped argument is redefined, if new descriptor is accessor property
            // or data-non-writable property, we have to "unmap" (unlink).
            final PropertyDescriptor desc = toPropertyDescriptor(Global.instance(), propertyDesc);
            if (desc.type() == PropertyDescriptor.ACCESSOR) {
                setDeleted(index, oldValue);
            } else if (desc.has(PropertyDescriptor.WRITABLE) && !desc.isWritable()) {
                // delete and set value from new descriptor if it has one, otherwise use old value
                setDeleted(index, desc.has(PropertyDescriptor.VALUE) ? desc.getValue() : oldValue);
            } else if (desc.has(PropertyDescriptor.VALUE)) {
                setArray(getArray().set(index, desc.getValue(), false));
            }
        }

        return true;
    }

    return super.defineOwnProperty(key, propertyDesc, reject);
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
/**
 * 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;
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
private static void setPropertyValue(final ScriptObject sobj, final String name, final Object value) {
    final int index = ArrayIndex.getArrayIndex(name);
    if (ArrayIndex.isValidArrayIndex(index)) {
        // array index key
        sobj.defineOwnProperty(index, value);
    } else if (sobj.getMap().findProperty(name) != null) {
        // pre-existing non-inherited property, call set
        sobj.set(name, value, 0);
    } else {
        // add new property
        sobj.addOwnProperty(name, Property.WRITABLE_ENUMERABLE_CONFIGURABLE, value);
    }
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
private void doesNotHave(final int index, final int value, final int callSiteFlags) {
    final long oldLength = getArray().length();
    final long longIndex = ArrayIndex.toLongIndex(index);
    if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
        final boolean strict = isStrictFlag(callSiteFlags);
        setArray(getArray().set(index, value, strict));
        doesNotHaveEnsureDelete(longIndex, oldLength, strict);
    }
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
private boolean hasArrayProperty(final int index) {
    boolean hasArrayKeys = false;

    for (ScriptObject self = this; self != null; self = self.getProto()) {
        if (self.getArray().has(index)) {
            return true;
        }
        hasArrayKeys = hasArrayKeys || self.getMap().containsArrayKeys();
    }

    return hasArrayKeys && hasProperty(ArrayIndex.toKey(index), true);
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
private static ArrayData addArrayElement(final ArrayData arrayData, final int index, final Object value) {
    final long oldLength = arrayData.length();
    final long longIndex = ArrayIndex.toLongIndex(index);
    ArrayData newArrayData = arrayData;
    if (longIndex >= oldLength) {
        newArrayData = newArrayData.ensure(longIndex);
        if (longIndex > oldLength) {
            newArrayData = newArrayData.delete(oldLength, longIndex - 1);
        }
    }
    return newArrayData.set(index, value, false);
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
@Override
public Object getOwnPropertyDescriptor(final Object key) {
    final int index = ArrayIndex.getArrayIndex(key);
    if (index >= 0 && index < value.length()) {
        final Global global = Global.instance();
        return global.newDataDescriptor(String.valueOf(value.charAt(index)), false, true, false);
    }

    return super.getOwnPropertyDescriptor(key);
}
 

import jdk.nashorn.internal.runtime.arrays.ArrayIndex; //导入依赖的package包/类
/**
 * ECMA 15.4.5.1 [[DefineOwnProperty]] ( P, Desc, Throw ) as specialized in
 * ECMA 10.6 for Arguments object.
 */
@Override
public boolean defineOwnProperty(final Object key, final Object propertyDesc, final boolean reject) {
    final int index = ArrayIndex.getArrayIndex(key);
    if (index >= 0) {
        final boolean isMapped = isMapped(index);
        final Object oldValue = isMapped ? getArray().getObject(index) : null;

        if (!super.defineOwnProperty(key, propertyDesc, false)) {
            if (reject) {
                throw typeError("cant.redefine.property",  key.toString(), ScriptRuntime.safeToString(this));
            }
            return false;
        }

        if (isMapped) {
            // When mapped argument is redefined, if new descriptor is accessor property
            // or data-non-writable property, we have to "unmap" (unlink).
            final PropertyDescriptor desc = toPropertyDescriptor(Global.instance(), propertyDesc);
            if (desc.type() == PropertyDescriptor.ACCESSOR) {
                setDeleted(index, oldValue);
            } else if (desc.has(PropertyDescriptor.WRITABLE) && !desc.isWritable()) {
                // delete and set value from new descriptor if it has one, otherwise use old value
                setDeleted(index, desc.has(PropertyDescriptor.VALUE) ? desc.getValue() : oldValue);
            } else if (desc.has(PropertyDescriptor.VALUE)) {
                setArray(getArray().set(index, desc.getValue(), false));
            }
        }

        return true;
    }

    return super.defineOwnProperty(key, propertyDesc, reject);
}