Java ScriptObject.set方法代码示例

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * ECMA 15.4.4.7 Array.prototype.push (args...)
 *
 * @param self self reference
 * @param args arguments to push
 * @return array length 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) && sobj.getArray().length() + args.length <= JSType.MAX_UINT) {
            final ArrayData newData = sobj.getArray().push(true, args);
            sobj.setArray(newData);
            return newData.length();
        }

        long len = JSType.toUint32(sobj.getLength());
        for (final Object element : args) {
            sobj.set(len++, element, CALLSITE_STRICT);
        }
        sobj.set("length", len, CALLSITE_STRICT);

        return len;
    } catch (final ClassCastException | NullPointerException e) {
        throw typeError(Context.getGlobal(), e, "not.an.object", ScriptRuntime.safeToString(self));
    }
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * ECMA 15.4.4.7 Array.prototype.push (args...)
 *
 * @param self self reference
 * @param args arguments to push
 * @return array length 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) && sobj.getArray().length() + args.length <= JSType.MAX_UINT) {
            final ArrayData newData = sobj.getArray().push(true, args);
            sobj.setArray(newData);
            return JSType.toNarrowestNumber(newData.length());
        }

        long len = JSType.toUint32(sobj.getLength());
        for (final Object element : args) {
            sobj.set(len++, element, CALLSITE_STRICT);
        }
        sobj.set("length", len, CALLSITE_STRICT);

        return JSType.toNarrowestNumber(len);
    } catch (final ClassCastException | NullPointerException e) {
        throw typeError(Context.getGlobal(), e, "not.an.object", ScriptRuntime.safeToString(self));
    }
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
private void initErrorObjects() {
    // Error objects
    this.builtinError = initConstructor("Error", ScriptFunction.class);
    final ScriptObject errorProto = getErrorPrototype();

    // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
    final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
    final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
    errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
    final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
    final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
    errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
    final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
    final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
    errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
    final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
    final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
    errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);

    // ECMA 15.11.4.2 Error.prototype.name
    // Error.prototype.name = "Error";
    errorProto.set(NativeError.NAME, "Error", 0);
    // ECMA 15.11.4.3 Error.prototype.message
    // Error.prototype.message = "";
    errorProto.set(NativeError.MESSAGE, "", 0);

    tagBuiltinProperties("Error", builtinError);

    this.builtinEvalError = initErrorSubtype("EvalError", errorProto);
    this.builtinRangeError = initErrorSubtype("RangeError", errorProto);
    this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
    this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
    this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
    this.builtinURIError = initErrorSubtype("URIError", errorProto);
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
    final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
    final ScriptObject prototype = ScriptFunction.getPrototype(cons);
    prototype.set(NativeError.NAME, name, 0);
    prototype.set(NativeError.MESSAGE, "", 0);
    prototype.setInitialProto(errorProto);
    tagBuiltinProperties(name, cons);
    return cons;
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
    for (final Field f : scriptEnv.getClass().getFields()) {
        try {
            options.set(f.getName(), f.get(scriptEnv), 0);
        } catch (final IllegalArgumentException | IllegalAccessException exp) {
            throw new RuntimeException(exp);
        }
    }
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * 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, CALLSITE_STRICT);
            return ScriptRuntime.UNDEFINED;
        }

        final long   index   = len - 1;
        final Object element = sobj.get(index);

        sobj.delete(index, true);
        sobj.set("length", index, CALLSITE_STRICT);

        return element;
    } catch (final ClassCastException | NullPointerException e) {
        throw typeError("not.an.object", ScriptRuntime.safeToString(self));
    }
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * 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, CALLSITE_STRICT);
                sobj.set(upper, lowerValue, CALLSITE_STRICT);
            } else if (!lowerExists && upperExists) {
                sobj.set(lower, upperValue, CALLSITE_STRICT);
                sobj.delete(upper, true);
            } else if (lowerExists && !upperExists) {
                sobj.delete(lower, true);
                sobj.set(upper, lowerValue, CALLSITE_STRICT);
            }
        }
        return sobj;
    } catch (final ClassCastException | NullPointerException e) {
        throw typeError("not.an.object", ScriptRuntime.safeToString(self));
    }
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
private void initErrorObjects() {
    // Error objects
    this.builtinError = initConstructor("Error", ScriptFunction.class);
    final ScriptObject errorProto = getErrorPrototype();

    // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
    final ScriptFunction getStack = ScriptFunction.createBuiltin("getStack", NativeError.GET_STACK);
    final ScriptFunction setStack = ScriptFunction.createBuiltin("setStack", NativeError.SET_STACK);
    errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
    final ScriptFunction getLineNumber = ScriptFunction.createBuiltin("getLineNumber", NativeError.GET_LINENUMBER);
    final ScriptFunction setLineNumber = ScriptFunction.createBuiltin("setLineNumber", NativeError.SET_LINENUMBER);
    errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
    final ScriptFunction getColumnNumber = ScriptFunction.createBuiltin("getColumnNumber", NativeError.GET_COLUMNNUMBER);
    final ScriptFunction setColumnNumber = ScriptFunction.createBuiltin("setColumnNumber", NativeError.SET_COLUMNNUMBER);
    errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
    final ScriptFunction getFileName = ScriptFunction.createBuiltin("getFileName", NativeError.GET_FILENAME);
    final ScriptFunction setFileName = ScriptFunction.createBuiltin("setFileName", NativeError.SET_FILENAME);
    errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);

    // ECMA 15.11.4.2 Error.prototype.name
    // Error.prototype.name = "Error";
    errorProto.set(NativeError.NAME, "Error", 0);
    // ECMA 15.11.4.3 Error.prototype.message
    // Error.prototype.message = "";
    errorProto.set(NativeError.MESSAGE, "", 0);

    tagBuiltinProperties("Error", builtinError);

    this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
    this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
    this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
private boolean defineLength(final long oldLen, final PropertyDescriptor oldLenDesc, final PropertyDescriptor desc, final boolean reject) {
    // 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
    long o = oldLen;
    while (newLen < o) {
        o--;
        final boolean deleteSucceeded = delete(o, false);
        if (!deleteSucceeded) {
            newLenDesc.setValue(o + 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, 0);
        return super.defineOwnProperty("length", newDesc, false);
    }

    return true;
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * 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;
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * 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 newLength;
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
private boolean defineLength(final long oldLen, final PropertyDescriptor oldLenDesc, final PropertyDescriptor desc, final boolean reject) {
    // 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());

    // Step 3e - note that we need to convert to int or double as long is not considered a JS number type anymore
    newLenDesc.setValue(JSType.toNarrowestNumber(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
    long o = oldLen;
    while (newLen < o) {
        o--;
        final boolean deleteSucceeded = delete(o, false);
        if (!deleteSucceeded) {
            newLenDesc.setValue(o + 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, 0);
        return super.defineOwnProperty("length", newDesc, false);
    }

    return true;
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * 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);
}