Java ScriptRuntime类代码示例

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
private static Object evalImpl(final Context.MultiGlobalCompiledScript mgcs, final ScriptContext ctxt, final Global ctxtGlobal) throws ScriptException {
    final Global oldGlobal = Context.getGlobal();
    final boolean globalChanged = (oldGlobal != ctxtGlobal);
    try {
        if (globalChanged) {
            Context.setGlobal(ctxtGlobal);
        }

        final ScriptFunction script = mgcs.getFunction(ctxtGlobal);
        ctxtGlobal.setScriptContext(ctxt);
        return ScriptObjectMirror.translateUndefined(ScriptObjectMirror.wrap(ScriptRuntime.apply(script, ctxtGlobal), ctxtGlobal));
    } catch (final Exception e) {
        throwAsScriptException(e, ctxtGlobal);
        throw new AssertionError("should not reach here");
    } finally {
        if (globalChanged) {
            Context.setGlobal(oldGlobal);
        }
    }
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
/**
 * ECMA 15.5.4.20 String.prototype.trim ( )
 * @param self self reference
 * @return string trimmed from whitespace
 */
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static String trim(final Object self) {
    final String str = checkObjectToString(self);
    int start = 0;
    int end   = str.length() - 1;

    while (start <= end && ScriptRuntime.isJSWhitespace(str.charAt(start))) {
        start++;
    }
    while (end > start && ScriptRuntime.isJSWhitespace(str.charAt(end))) {
        end--;
    }

    return str.substring(start, end + 1);
}
 

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

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
/**
 * ECMA 15.3.4.4 Function.prototype.call (thisArg [ , arg1 [ , arg2, ... ] ] )
 *
 * @param self self reference
 * @param args arguments for call
 * @return result of call
 */
@Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
public static Object call(final Object self, final Object... args) {
    checkCallable(self);

    final Object thiz = (args.length == 0) ? UNDEFINED : args[0];
    Object[] arguments;

    if (args.length > 1) {
        arguments = new Object[args.length - 1];
        System.arraycopy(args, 1, arguments, 0, arguments.length);
    } else {
        arguments = ScriptRuntime.EMPTY_ARRAY;
    }

    if (self instanceof ScriptFunction) {
        return ScriptRuntime.apply((ScriptFunction)self, thiz, arguments);
    } else if (self instanceof JSObject) {
        return ((JSObject)self).call(thiz, arguments);
    }

    throw new AssertionError("should not reach here");
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
NativeArray(final Object[] array) {
    this(ArrayData.allocate(array.length));

    ArrayData arrayData = this.getArray();
    if (array.length > 0) {
        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);
}
 

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

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
/**
 * 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 String 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();
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的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.ScriptRuntime; //导入依赖的package包/类
/**
 * Test of toString method, of class Runtime.
 */
@Test
public void testToString_Object() {
    assertEquals(JSType.toString(ScriptRuntime.UNDEFINED), "undefined");
    assertEquals(JSType.toString(null), "null");
    assertEquals(JSType.toString(Boolean.TRUE), "true");
    assertEquals(JSType.toString(Boolean.FALSE), "false");
    assertEquals(JSType.toString(""), "");
    assertEquals(JSType.toString("nashorn"), "nashorn");
    assertEquals(JSType.toString(Double.NaN), "NaN");
    assertEquals(JSType.toString(Double.POSITIVE_INFINITY), "Infinity");
    assertEquals(JSType.toString(Double.NEGATIVE_INFINITY), "-Infinity");
    assertEquals(JSType.toString(0.0), "0");
    // FIXME: add more number-to-string test cases
    // FIXME: add case for Object type (JSObject with getDefaultValue)
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
@Override
public Object[] asObjectArray() {
    final int len = (int)Math.min(length(), Integer.MAX_VALUE);
    final int underlyingLength = (int)Math.min(len, underlying.length());
    final Object[] objArray = new Object[len];

    for (int i = 0; i < underlyingLength; i++) {
        objArray[i] = underlying.getObject(i);
    }

    Arrays.fill(objArray, underlyingLength, len, ScriptRuntime.UNDEFINED);

    for (final Map.Entry<Long, Object> entry : sparseMap.entrySet()) {
        final long key = entry.getKey();
        if (key < Integer.MAX_VALUE) {
            objArray[(int)key] = entry.getValue();
        } else {
            break; // ascending key order
        }
    }

    return objArray;
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
@Override
public Object pop() {
    final long len = length();
    final long underlyingLen = underlying.length();
    if (len == 0) {
        return ScriptRuntime.UNDEFINED;
    }
    if (len == underlyingLen) {
        final Object result = underlying.pop();
        setLength(underlying.length());
        return result;
    }
    setLength(len - 1);
    final Long key = len - 1;
    return sparseMap.containsKey(key) ? sparseMap.remove(key) : ScriptRuntime.UNDEFINED;
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
private static GuardedInvocation linkBean(final LinkRequest linkRequest) throws Exception {
    final CallSiteDescriptor desc = linkRequest.getCallSiteDescriptor();
    final Object self = linkRequest.getReceiver();
    switch (NashornCallSiteDescriptor.getStandardOperation(desc)) {
    case NEW:
        if(BeansLinker.isDynamicConstructor(self)) {
            throw typeError("no.constructor.matches.args", ScriptRuntime.safeToString(self));
        }
        if(BeansLinker.isDynamicMethod(self)) {
            throw typeError("method.not.constructor", ScriptRuntime.safeToString(self));
        }
        throw typeError("not.a.function", NashornCallSiteDescriptor.getFunctionErrorMessage(desc, self));
    case CALL:
        if(BeansLinker.isDynamicConstructor(self)) {
            throw typeError("constructor.requires.new", ScriptRuntime.safeToString(self));
        }
        if(BeansLinker.isDynamicMethod(self)) {
            throw typeError("no.method.matches.args", ScriptRuntime.safeToString(self));
        }
        throw typeError("not.a.function", NashornCallSiteDescriptor.getFunctionErrorMessage(desc, self));
    default:
        // Everything else is supposed to have been already handled by Bootstrap.beansLinker
        // delegating to linkNoSuchBeanMember
        throw new AssertionError("unknown call type " + desc);
    }
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
@Override
public Iterator<String> propertyIterator() {
    // Try __getIds__ first, if not found then try __getKeys__
    // In jdk6, we had added "__getIds__" so this is just for compatibility.
    Object func = adaptee.get(__getIds__);
    if (!(func instanceof ScriptFunction)) {
        func = adaptee.get(__getKeys__);
    }

    Object obj;
    if (func instanceof ScriptFunction) {
        obj = ScriptRuntime.apply((ScriptFunction)func, this);
    } else {
        obj = new NativeArray(0);
    }

    final List<String> array = new ArrayList<>();
    for (final Iterator<Object> iter = ArrayLikeIterator.arrayLikeIterator(obj); iter.hasNext(); ) {
        array.add((String)iter.next());
    }

    return array.iterator();
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
NativeArray(final Object[] array) {
    this(ArrayData.allocate(array.length));

    ArrayData arrayData = this.getArray();

    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);
}
 

import jdk.nashorn.internal.runtime.ScriptRuntime; //导入依赖的package包/类
@Override
public String toString() {
    return inGlobal(new Callable<String>() {
        @Override
        public String call() {
            return ScriptRuntime.safeToString(sobj);
        }
    });
}