org.mozilla.javascript.NativeArray.getLengthProperty()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 JavaScript  
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本文整理了Java中org.mozilla.javascript.NativeArray.getLengthProperty()方法的一些代码示例，展示了NativeArray.getLengthProperty()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。NativeArray.getLengthProperty()方法的具体详情如下：
包路径：org.mozilla.javascript.NativeArray
类名称：NativeArray
方法名：getLengthProperty

NativeArray.getLengthProperty介绍

暂无

代码示例

代码示例来源：origin: rhino/js

public static Object[] getArrayElements(Scriptable object)
{
  Context cx = Context.getContext();
  long longLen = NativeArray.getLengthProperty(cx, object);
  if (longLen > Integer.MAX_VALUE) {
    // arrays beyond  MAX_INT is not in Java in any case
    throw new IllegalArgumentException();
  }
  int len = (int) longLen;
  if (len == 0) {
    return ScriptRuntime.emptyArgs;
  } else {
    Object[] result = new Object[len];
    for (int i=0; i < len; i++) {
      Object elem = ScriptableObject.getProperty(object, i);
      result[i] = (elem == Scriptable.NOT_FOUND) ? Undefined.instance
                            : elem;
    }
    return result;
  }
}

代码示例来源：origin: geogebra/geogebra

public static Object[] getArrayElements(Scriptable object)
{
  Context cx = Context.getContext();
  long longLen = NativeArray.getLengthProperty(cx, object);
  if (longLen > Integer.MAX_VALUE) {
    // arrays beyond  MAX_INT is not in Java in any case
    throw new IllegalArgumentException();
  }
  int len = (int) longLen;
  if (len == 0) {
    return ScriptRuntime.emptyArgs;
  } else {
    Object[] result = new Object[len];
    for (int i=0; i < len; i++) {
      Object elem = ScriptableObject.getProperty(object, i);
      result[i] = (elem == Scriptable.NOT_FOUND) ? Undefined.instance
                            : elem;
    }
    return result;
  }
}

代码示例来源：origin: ro.isdc.wro4j/rhino

public static Object[] getArrayElements(Scriptable object)
{
  Context cx = Context.getContext();
  long longLen = NativeArray.getLengthProperty(cx, object);
  if (longLen > Integer.MAX_VALUE) {
    // arrays beyond  MAX_INT is not in Java in any case
    throw new IllegalArgumentException();
  }
  int len = (int) longLen;
  if (len == 0) {
    return ScriptRuntime.emptyArgs;
  } else {
    Object[] result = new Object[len];
    for (int i=0; i < len; i++) {
      Object elem = ScriptableObject.getProperty(object, i);
      result[i] = (elem == Scriptable.NOT_FOUND) ? Undefined.instance
                            : elem;
    }
    return result;
  }
}

代码示例来源：origin: com.sun.phobos/phobos-rhino

public static Object[] getArrayElements(Scriptable object)
{
  Context cx = Context.getContext();
  long longLen = NativeArray.getLengthProperty(cx, object);
  if (longLen > Integer.MAX_VALUE) {
    // arrays beyond  MAX_INT is not in Java in any case
    throw new IllegalArgumentException();
  }
  int len = (int) longLen;
  if (len == 0) {
    return ScriptRuntime.emptyArgs;
  } else {
    Object[] result = new Object[len];
    for (int i=0; i < len; i++) {
      Object elem = ScriptableObject.getProperty(object, i);
      result[i] = (elem == Scriptable.NOT_FOUND) ? Undefined.instance
                            : elem;
    }
    return result;
  }
}

代码示例来源：origin: com.github.tntim96/rhino

public static Object[] getArrayElements(Scriptable object)
{
  Context cx = Context.getContext();
  long longLen = NativeArray.getLengthProperty(cx, object);
  if (longLen > Integer.MAX_VALUE) {
    // arrays beyond  MAX_INT is not in Java in any case
    throw new IllegalArgumentException();
  }
  int len = (int) longLen;
  if (len == 0) {
    return ScriptRuntime.emptyArgs;
  } else {
    Object[] result = new Object[len];
    for (int i=0; i < len; i++) {
      Object elem = ScriptableObject.getProperty(object, i);
      result[i] = (elem == Scriptable.NOT_FOUND) ? Undefined.instance
                            : elem;
    }
    return result;
  }
}

代码示例来源：origin: io.apigee/rhino

public static Object[] getArrayElements(Scriptable object)
{
  Context cx = Context.getContext();
  long longLen = NativeArray.getLengthProperty(cx, object);
  if (longLen > Integer.MAX_VALUE) {
    // arrays beyond  MAX_INT is not in Java in any case
    throw new IllegalArgumentException();
  }
  int len = (int) longLen;
  if (len == 0) {
    return ScriptRuntime.emptyArgs;
  } else {
    Object[] result = new Object[len];
    for (int i=0; i < len; i++) {
      Object elem = ScriptableObject.getProperty(object, i);
      result[i] = (elem == Scriptable.NOT_FOUND) ? Undefined.instance
                            : elem;
    }
    return result;
  }
}

代码示例来源：origin: com.sun.phobos/phobos-rhino

private static Object js_pop(Context cx, Scriptable thisObj,
               Object[] args)
{
  Object result;
  long length = getLengthProperty(cx, thisObj);
  if (length > 0) {
    length--;
    // Get the to-be-deleted property's value.
    result = getElem(cx, thisObj, length);
    // We don't need to delete the last property, because
    // setLength does that for us.
  } else {
    result = Undefined.instance;
  }
  // necessary to match js even when length < 0; js pop will give a
  // length property to any target it is called on.
  setLengthProperty(cx, thisObj, length);
  return result;
}

代码示例来源：origin: rhino/js

private static Object js_pop(Context cx, Scriptable thisObj,
               Object[] args)
{
  Object result;
  if (thisObj instanceof NativeArray) {
    NativeArray na = (NativeArray) thisObj;
    if (na.denseOnly && na.length > 0) {
      na.length--;
      result = na.dense[(int)na.length];
      na.dense[(int)na.length] = NOT_FOUND;
      return result;
    }
  }
  long length = getLengthProperty(cx, thisObj);
  if (length > 0) {
    length--;
    // Get the to-be-deleted property's value.
    result = getElem(cx, thisObj, length);
    // We don't need to delete the last property, because
    // setLength does that for us.
  } else {
    result = Undefined.instance;
  }
  // necessary to match js even when length < 0; js pop will give a
  // length property to any target it is called on.
  setLengthProperty(cx, thisObj, length);
  return result;
}

代码示例来源：origin: com.sun.phobos/phobos-rhino

/**
 * Non-ECMA methods.
 */
private static Object js_push(Context cx, Scriptable thisObj,
               Object[] args)
{
  long length = getLengthProperty(cx, thisObj);
  for (int i = 0; i < args.length; i++) {
    setElem(cx, thisObj, length + i, args[i]);
  }
  length += args.length;
  Object lengthObj = setLengthProperty(cx, thisObj, length);
  /*
   * If JS1.2, follow Perl4 by returning the last thing pushed.
   * Otherwise, return the new array length.
   */
  if (cx.getLanguageVersion() == Context.VERSION_1_2)
    // if JS1.2 && no arguments, return undefined.
    return args.length == 0
      ? Undefined.instance
      : args[args.length - 1];
  else
    return lengthObj;
}

代码示例来源：origin: geogebra/geogebra

private static Object js_pop(Context cx, Scriptable thisObj,
               Object[] args)
{
  Object result;
  if (thisObj instanceof NativeArray) {
    NativeArray na = (NativeArray) thisObj;
    if (na.denseOnly && na.length > 0) {
      na.length--;
      result = na.dense[(int)na.length];
      na.dense[(int)na.length] = NOT_FOUND;
      return result;
    }
  }
  long length = getLengthProperty(cx, thisObj);
  if (length > 0) {
    length--;
    // Get the to-be-deleted property's value.
    result = getElem(cx, thisObj, length);
    // We need to delete the last property, because 'thisObj' may not
    // have setLength which does that for us.
    deleteElem(thisObj, length);
  } else {
    result = Undefined.instance;
  }
  // necessary to match js even when length < 0; js pop will give a
  // length property to any target it is called on.
  setLengthProperty(cx, thisObj, length);
  return result;
}

代码示例来源：origin: com.sun.phobos/phobos-rhino

/**
 * See ECMA 15.4.4.4
 */
private static Scriptable js_reverse(Context cx, Scriptable thisObj,
                   Object[] args)
{
  long len = getLengthProperty(cx, thisObj);
  long half = len / 2;
  for(long i=0; i < half; i++) {
    long j = len - i - 1;
    Object temp1 = getElem(cx, thisObj, i);
    Object temp2 = getElem(cx, thisObj, j);
    setElem(cx, thisObj, i, temp2);
    setElem(cx, thisObj, j, temp1);
  }
  return thisObj;
}

代码示例来源：origin: rhino/js

/**
 * See ECMA 15.4.4.4
 */
private static Scriptable js_reverse(Context cx, Scriptable thisObj,
                   Object[] args)
{
  if (thisObj instanceof NativeArray) {
    NativeArray na = (NativeArray) thisObj;
    if (na.denseOnly) {
      for (int i=0, j=((int)na.length)-1; i < j; i++,j--) {
        Object temp = na.dense[i];
        na.dense[i] = na.dense[j];
        na.dense[j] = temp;
      }
      return thisObj;
    }
  }
  long len = getLengthProperty(cx, thisObj);
  long half = len / 2;
  for(long i=0; i < half; i++) {
    long j = len - i - 1;
    Object temp1 = getElem(cx, thisObj, i);
    Object temp2 = getElem(cx, thisObj, j);
    setElem(cx, thisObj, i, temp2);
    setElem(cx, thisObj, j, temp1);
  }
  return thisObj;
}

代码示例来源：origin: geogebra/geogebra

/**
 * See ECMA 15.4.4.4
 */
private static Scriptable js_reverse(Context cx, Scriptable thisObj,
                   Object[] args)
{
  if (thisObj instanceof NativeArray) {
    NativeArray na = (NativeArray) thisObj;
    if (na.denseOnly) {
      for (int i=0, j=((int)na.length)-1; i < j; i++,j--) {
        Object temp = na.dense[i];
        na.dense[i] = na.dense[j];
        na.dense[j] = temp;
      }
      return thisObj;
    }
  }
  long len = getLengthProperty(cx, thisObj);
  long half = len / 2;
  for(long i=0; i < half; i++) {
    long j = len - i - 1;
    Object temp1 = getRawElem(thisObj, i);
    Object temp2 = getRawElem(thisObj, j);
    setRawElem(cx, thisObj, i, temp2);
    setRawElem(cx, thisObj, j, temp1);
  }
  return thisObj;
}

代码示例来源：origin: com.sun.phobos/phobos-rhino

private static Object js_unshift(Context cx, Scriptable thisObj,
                 Object[] args)
{
  long length = getLengthProperty(cx, thisObj);
  int argc = args.length;
  if (args.length > 0) {
    /*  Slide up the array to make room for args at the bottom */
    if (length > 0) {
      for (long last = length - 1; last >= 0; last--) {
        Object temp = getElem(cx, thisObj, last);
        setElem(cx, thisObj, last + argc, temp);
      }
    }
    /* Copy from argv to the bottom of the array. */
    for (int i = 0; i < args.length; i++) {
      setElem(cx, thisObj, i, args[i]);
    }
    /* Follow Perl by returning the new array length. */
    length += args.length;
    return setLengthProperty(cx, thisObj, length);
  }
  return ScriptRuntime.wrapNumber(length);
}

代码示例来源：origin: io.apigee/rhino

long length = getLengthProperty(cx, thisObj);
for (int i = 0; i < args.length; i++) {
  setElem(cx, thisObj, length + i, args[i]);

代码示例来源：origin: geogebra/geogebra

private Scriptable js_slice(Context cx, Scriptable thisObj,
              Object[] args)
{
  Scriptable scope = getTopLevelScope(this);
  Scriptable result = cx.newArray(scope, 0);
  long length = getLengthProperty(cx, thisObj);
  long begin, end;
  if (args.length == 0) {
    begin = 0;
    end = length;
  } else {
    begin = toSliceIndex(ScriptRuntime.toInteger(args[0]), length);
    if (args.length == 1 || args[1] == Undefined.instance) {
      end = length;
    } else {
      end = toSliceIndex(ScriptRuntime.toInteger(args[1]), length);
    }
  }
  for (long slot = begin; slot < end; slot++) {
    Object temp = getRawElem(thisObj, slot);
    if (temp != NOT_FOUND) {
      defineElem(cx, result, slot - begin, temp);
    }
  }
  setLengthProperty(cx, result, Math.max(0, end - begin));
  return result;
}

代码示例来源：origin: com.github.tntim96/rhino

private Scriptable js_slice(Context cx, Scriptable thisObj,
              Object[] args)
{
  Scriptable scope = getTopLevelScope(this);
  Scriptable result = cx.newArray(scope, 0);
  long length = getLengthProperty(cx, thisObj);
  long begin, end;
  if (args.length == 0) {
    begin = 0;
    end = length;
  } else {
    begin = toSliceIndex(ScriptRuntime.toInteger(args[0]), length);
    if (args.length == 1) {
      end = length;
    } else {
      end = toSliceIndex(ScriptRuntime.toInteger(args[1]), length);
    }
  }
  for (long slot = begin; slot < end; slot++) {
    Object temp = getRawElem(thisObj, slot);
    if (temp != NOT_FOUND) {
      setElem(cx, result, slot - begin, temp);
    }
  }
  setLengthProperty(cx, result, Math.max(0, end - begin));
  return result;
}

代码示例来源：origin: ro.isdc.wro4j/rhino

private Scriptable js_slice(Context cx, Scriptable thisObj,
              Object[] args)
{
  Scriptable scope = getTopLevelScope(this);
  Scriptable result = cx.newArray(scope, 0);
  long length = getLengthProperty(cx, thisObj);
  long begin, end;
  if (args.length == 0) {
    begin = 0;
    end = length;
  } else {
    begin = toSliceIndex(ScriptRuntime.toInteger(args[0]), length);
    if (args.length == 1) {
      end = length;
    } else {
      end = toSliceIndex(ScriptRuntime.toInteger(args[1]), length);
    }
  }
  for (long slot = begin; slot < end; slot++) {
    Object temp = getRawElem(thisObj, slot);
    if (temp != NOT_FOUND) {
      setElem(cx, result, slot - begin, temp);
    }
  }
  setLengthProperty(cx, result, Math.max(0, end - begin));
  return result;
}

代码示例来源：origin: rhino/js

private Scriptable js_slice(Context cx, Scriptable thisObj,
              Object[] args)
{
  Scriptable scope = getTopLevelScope(this);
  Scriptable result = ScriptRuntime.newObject(cx, scope, "Array", null);
  long length = getLengthProperty(cx, thisObj);
  long begin, end;
  if (args.length == 0) {
    begin = 0;
    end = length;
  } else {
    begin = toSliceIndex(ScriptRuntime.toInteger(args[0]), length);
    if (args.length == 1) {
      end = length;
    } else {
      end = toSliceIndex(ScriptRuntime.toInteger(args[1]), length);
    }
  }
  for (long slot = begin; slot < end; slot++) {
    Object temp = getElem(cx, thisObj, slot);
    setElem(cx, result, slot - begin, temp);
  }
  return result;
}

代码示例来源：origin: com.sun.phobos/phobos-rhino

private Scriptable js_slice(Context cx, Scriptable thisObj,
              Object[] args)
{
  Scriptable scope = getTopLevelScope(this);
  Scriptable result = ScriptRuntime.newObject(cx, scope, "Array", null);
  long length = getLengthProperty(cx, thisObj);
  long begin, end;
  if (args.length == 0) {
    begin = 0;
    end = length;
  } else {
    begin = toSliceIndex(ScriptRuntime.toInteger(args[0]), length);
    if (args.length == 1) {
      end = length;
    } else {
      end = toSliceIndex(ScriptRuntime.toInteger(args[1]), length);
    }
  }
  for (long slot = begin; slot < end; slot++) {
    Object temp = getElem(cx, thisObj, slot);
    setElem(cx, result, slot - begin, temp);
  }
  return result;
}

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