How to use com.eclipsesource.v8

@Override
public V8ArrayBuffer twin() {
  v8.checkThread();
  checkReleased();
  return (V8ArrayBuffer) super.twin();
}

/**
 * Returns the type of element at this given index.
 *
 * @param index The index at which to lookup the type of.
 *
 * @return The type of the element at the index.
 */
public int getType(final int index) {
  v8.checkThread();
  checkReleased();
  return v8.getType(v8.getV8RuntimePtr(), getHandle(), index);
}

/**
 * Gets the type of the array. Returns a 'type' if all the elements in the array
 * have the same type, otherwise UNDEFINED is returned.
 *
 * @return The type of all the elements of the array, or UNDEFINED if they
 * are not all the same type.
 */
public int getType() {
  v8.checkThread();
  checkReleased();
  return v8.getArrayType(v8.getV8RuntimePtr(), getHandle());
}

@Override
public String toString() {
  if (isReleased() || v8.isReleased()) {
    return "[Object released]";
  }
  v8.checkThread();
  return v8.toString(v8.getV8RuntimePtr(), getHandle());
}

/**
 * Returns the length of this array.
 *
 * @return The length of the array.
 */
public int length() {
  v8.checkThread();
  checkReleased();
  return v8.arrayGetSize(v8.getV8RuntimePtr(), getHandle());
}

@Override
public int hashCode() {
  v8.checkThread();
  checkReleased();
  return v8.identityHash(v8.getV8RuntimePtr(), getHandle());
}

@Override
protected void initialize(final long runtimePtr, final Object data) {
  v8.checkThread();
  if (data == null) {
    super.initialize(runtimePtr, data);
    return;
  }
  V8ArrayData arrayData = (V8ArrayData) data;
  checkArrayProperties(arrayData);
  long handle = createTypedArray(runtimePtr, arrayData);
  released = false;
  addObjectReference(handle);
}

/**
 * Releases the NodeJS runtime.
 */
public void release() {
  v8.checkThread();
  if (!require.isReleased()) {
    require.close();
  }
  if (!v8.isReleased()) {
    v8.close();
  }
}

/**
 * If {@link V8Value#setWeak()} has been called on this Object, this method
 * will return true. Otherwise it will return false.
 *
 * @return Returns true if this object has been set 'Weak', return false otherwise.
 */
public boolean isWeak() {
  v8.checkThread();
  v8.checkReleased();
  return v8.isWeak(v8.getV8RuntimePtr(), getHandle());
}

/**
 * Returns all the keys associated with this JavaScript Object.
 * Keys associated with the objects prototype are not returned.
 *
 * @return The keys associated with this JavaScript Object.
 */
public String[] getKeys() {
  v8.checkThread();
  checkReleased();
  return v8.getKeys(v8.getV8RuntimePtr(), objectHandle);
}

protected V8(final String globalAlias) {
  super(null);
  released = false;
  v8RuntimePtr = _createIsolate(globalAlias);
  locker = new V8Locker(this);
  checkThread();
  objectHandle = _getGlobalObject(v8RuntimePtr);
}

/**
 * Gets the value at a given index as a Java Object. Primitives are boxed.
 *
 * @param index The index to get the value at.
 *
 * @return The value at the given index.
 */
public Object get(final int index) {
  v8.checkThread();
  checkReleased();
  return v8.arrayGet(v8.getV8RuntimePtr(), V8_OBJECT, objectHandle, index);
}

private void setupDebugObject(final V8 runtime) {
  V8Object outerDebug = runtime.getObject(DEBUG_OBJECT_NAME);
  try {
    debugObject = outerDebug.getObject(V8_DEBUG_OBJECT);
  } finally {
    outerDebug.close();
  }
}

protected V8Object(final V8 v8, final Object data) {
  super(v8);
  if (v8 != null) {
    this.v8.checkThread();
    initialize(this.v8.getV8RuntimePtr(), data);
  }
}

@Override
public String toString() {
  if (released || v8.isReleased()) {
    return "[Array released]";
  }
  return super.toString();
}

@Override
protected V8Value createTwin() {
  v8.checkThread();
  checkReleased();
  return new V8TypedArray(v8);
}

protected void addObjectReference(final long objectHandle) throws Error {
  this.objectHandle = objectHandle;
  try {
    v8.addObjRef(this);
  } catch (Error e) {
    release();
    throw e;
  } catch (RuntimeException e) {
    release();
    throw e;
  }
}

@Override
protected void initialize(final long runtimePtr, final Object data) {
  long handle = v8.initNewV8Array(runtimePtr);
  released = false;
  addObjectReference(handle);
}

protected void initialize(final long runtimePtr, final Object data) {
  long objectHandle = v8.initNewV8Object(runtimePtr);
  released = false;
  addObjectReference(objectHandle);
}

@Override
public String toString() {
  if (released || v8.isReleased()) {
    return "[Function released]";
  }
  return super.toString();
}