Java Code Examples for jdk.nashorn.internal.runtime.ScriptObject#has()

/**
 * Nashorn extension: Error.prototype.stack
 * "stack" property is a string typed value containing JavaScript stack frames.
 * Each frame information is separated bv "\n" character.
 *
 * @param self  self reference
 *
 * @return      value of "stack" property
 */
public static Object getStack(final Object self) {
    final ScriptObject sobj = Global.checkObject(self);
    if (sobj.has(STACK)) {
        return sobj.get(STACK);
    }

    final Object exception = ECMAException.getException(sobj);
    if (exception instanceof Throwable) {
        final Object value = getScriptStackString(sobj, (Throwable)exception);
        if (sobj.hasOwnProperty(STACK)) {
            sobj.put(STACK, value, false);
        } else {
            sobj.addOwnProperty(STACK, Attribute.NOT_ENUMERABLE, value);
        }

        return value;
    }

    return UNDEFINED;
}
 

@Override
public PropertyDescriptor fillFrom(final ScriptObject sobj) {
    if (sobj.has(CONFIGURABLE)) {
        this.configurable = JSType.toBoolean(sobj.get(CONFIGURABLE));
    } else {
        delete(CONFIGURABLE, false);
    }

    if (sobj.has(ENUMERABLE)) {
        this.enumerable = JSType.toBoolean(sobj.get(ENUMERABLE));
    } else {
        delete(ENUMERABLE, false);
    }

    return this;
}
 

@Override
public PropertyDescriptor fillFrom(final ScriptObject sobj) {
    if (sobj.has(CONFIGURABLE)) {
        this.configurable = JSType.toBoolean(sobj.get(CONFIGURABLE));
    } else {
        delete(CONFIGURABLE, false);
    }

    if (sobj.has(ENUMERABLE)) {
        this.enumerable = JSType.toBoolean(sobj.get(ENUMERABLE));
    } else {
        delete(ENUMERABLE, false);
    }

    return this;
}
 

/**
 * Nashorn extension: Error.prototype.stack
 * "stack" property is a string typed value containing JavaScript stack frames.
 * Each frame information is separated bv "\n" character.
 *
 * @param self  self reference
 *
 * @return      value of "stack" property
 */
public static Object getStack(final Object self) {
    final ScriptObject sobj = Global.checkObject(self);
    if (sobj.has(STACK)) {
        return sobj.get(STACK);
    }

    final Object exception = ECMAException.getException(sobj);
    if (exception instanceof Throwable) {
        final Object value = getScriptStackString(sobj, (Throwable)exception);
        if (sobj.hasOwnProperty(STACK)) {
            sobj.put(STACK, value, false);
        } else {
            sobj.addOwnProperty(STACK, Attribute.NOT_ENUMERABLE, value);
        }

        return value;
    }

    return UNDEFINED;
}
 

/**
 * 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 double 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;
}
 

/**
 * Nashorn extension: Error.captureStackTrace. Capture stack trace at the point of call into the Error object provided.
 *
 * @param self self reference
 * @param errorObj the error object
 * @return undefined
 */
@Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
public static Object captureStackTrace(final Object self, final Object errorObj) {
    final ScriptObject sobj = Global.checkObject(errorObj);
    initException(sobj);
    sobj.delete(STACK, false);
    if (! sobj.has("stack")) {
        final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", GET_STACK);
        final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", SET_STACK);
        sobj.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
    }
    return UNDEFINED;
}
 

/**
 * Nashorn extension: Error.captureStackTrace. Capture stack trace at the point of call into the Error object provided.
 *
 * @param self self reference
 * @param errorObj the error object
 * @return undefined
 */
@Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
public static Object captureStackTrace(final Object self, final Object errorObj) {
    final ScriptObject sobj = Global.checkObject(errorObj);
    initException(sobj);
    sobj.delete(STACK, false);
    if (! sobj.has("stack")) {
        final ScriptFunction getStack = ScriptFunction.createBuiltin("getStack", GET_STACK);
        final ScriptFunction setStack = ScriptFunction.createBuiltin("setStack", SET_STACK);
        sobj.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
    }
    return UNDEFINED;
}
 

/**
 * Nashorn extension: Error.captureStackTrace. Capture stack trace at the point of call into the Error object provided.
 *
 * @param self self reference
 * @param errorObj the error object
 * @return undefined
 */
@Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
public static Object captureStackTrace(final Object self, final Object errorObj) {
    final ScriptObject sobj = Global.checkObject(errorObj);
    initException(sobj);
    sobj.delete(STACK, false);
    if (! sobj.has("stack")) {
        final ScriptFunction getStack = ScriptFunction.createBuiltin("getStack", GET_STACK);
        final ScriptFunction setStack = ScriptFunction.createBuiltin("setStack", SET_STACK);
        sobj.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
    }
    return UNDEFINED;
}
 

/**
 * Get the capacity of the event queue
 * @param self self reference
 * @return capacity of event queue as an integer
 */
@Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
public static Object getEventQueueCapacity(final Object self) {
    final ScriptObject sobj = (ScriptObject)self;
    Integer cap;
    if (sobj.has(EVENT_QUEUE_CAPACITY)) {
        cap = JSType.toInt32(sobj.get(EVENT_QUEUE_CAPACITY));
    } else {
        setEventQueueCapacity(self, cap = RuntimeEvent.RUNTIME_EVENT_QUEUE_SIZE);
    }
    return cap;
}
 

/**
 * 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 double 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 15.4.4.8 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 15.4.4.8 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 15.4.4.13 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, CALLSITE_STRICT);
            } else {
                sobj.delete(to, true);
            }
        }

        for (int j = 0; j < items.length; j++) {
            sobj.set(j, items[j], CALLSITE_STRICT);
        }
    }

    final long newLength = len + items.length;
    sobj.set("length", newLength, CALLSITE_STRICT);

    return JSType.toNarrowestNumber(newLength);
}
 

/**
 * 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++) {
                final boolean hasCurrent = sobj.has(k);
                if (hasCurrent) {
                    sobj.set(k - 1, sobj.get(k), CALLSITE_STRICT);
                } else if (hasPrevious) {
                    sobj.delete(k - 1, true);
                }
                hasPrevious = hasCurrent;
            }
        }
        sobj.delete(--len, true);
    } else {
        len = 0;
    }

    sobj.set("length", len, CALLSITE_STRICT);

    return first;
}
 

/**
 * 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;
}
 

/**
 * Nashorn extension: Error.prototype.columnNumber
 *
 * @param self self reference
 *
 * @return column number from which error was thrown
 */
public static Object getColumnNumber(final Object self) {
    Global.checkObject(self);
    final ScriptObject sobj = (ScriptObject)self;
    return sobj.has(COLUMNNUMBER) ? sobj.get(COLUMNNUMBER) : ECMAException.getColumnNumber((ScriptObject)self);
}
 

/**
 * Nashorn extension: Error.prototype.lineNumber
 *
 * @param self self reference
 *
 * @return line number from which error was thrown
 */
public static Object getLineNumber(final Object self) {
    Global.checkObject(self);
    final ScriptObject sobj = (ScriptObject)self;
    return sobj.has(LINENUMBER) ? sobj.get(LINENUMBER) : ECMAException.getLineNumber(sobj);
}
 

/**
 * Nashorn extension: Error.prototype.columnNumber
 *
 * @param self self reference
 *
 * @return column number from which error was thrown
 */
public static Object getColumnNumber(final Object self) {
    Global.checkObject(self);
    final ScriptObject sobj = (ScriptObject)self;
    return sobj.has(COLUMNNUMBER) ? sobj.get(COLUMNNUMBER) : ECMAException.getColumnNumber((ScriptObject)self);
}
 

/**
 * Nashorn extension: Error.prototype.columnNumber
 *
 * @param self self reference
 *
 * @return column number from which error was thrown
 */
public static Object getColumnNumber(final Object self) {
    Global.checkObject(self);
    final ScriptObject sobj = (ScriptObject)self;
    return sobj.has(COLUMNNUMBER) ? sobj.get(COLUMNNUMBER) : ECMAException.getColumnNumber((ScriptObject)self);
}
 

/**
 * Nashorn extension: Error.prototype.lineNumber
 *
 * @param self self reference
 *
 * @return line number from which error was thrown
 */
public static Object getLineNumber(final Object self) {
    final ScriptObject sobj = Global.checkObject(self);
    return sobj.has(LINENUMBER) ? sobj.get(LINENUMBER) : ECMAException.getLineNumber(sobj);
}