How to use

prepend

method

in

com.headius.invokebinder.Binder

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, Object value) {
  return new SmartBinder(this, signature().prependArg(name, value.getClass()), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, byte value) {
  return new SmartBinder(this, signature().prependArg(name, byte.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, boolean value) {
  return new SmartBinder(this, signature().prependArg(name, boolean.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, float value) {
  return new SmartBinder(this, signature().prependArg(name, float.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, double value) {
  return new SmartBinder(this, signature().prependArg(name, double.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, char value) {
  return new SmartBinder(this, signature().prependArg(name, char.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, long value) {
  return new SmartBinder(this, signature().prependArg(name, long.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, short value) {
  return new SmartBinder(this, signature().prependArg(name, short.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, int value) {
  return new SmartBinder(this, signature().prependArg(name, int.class), binder.prepend(value));
}

/**
 * Prepend the given argument to the argument list, assigning it the
 * given name.
 *
 * @param name  the name of the new argument
 * @param type  the type to use in the new signature
 * @param value the value of the new argument
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String name, Class<?> type, Object value) {
  return new SmartBinder(this, signature().prependArg(name, type), binder.prepend(type, value));
}

/**
 * Prepend the given arguments to the argument list, assigning them the
 * given name.
 *
 * @param names  the names of the new arguments
 * @param types  the types to use in the new signature
 * @param values the values of the new arguments
 * @return a new SmartBinder with the prepend applied
 */
public SmartBinder prepend(String[] names, Class<?>[] types, Object... values) {
  return new SmartBinder(this, signature().prependArgs(names, types), binder.prepend(types, values));
}

public static CallSite bootstrap(MethodHandles.Lookup lookup, String name, MethodType type, int unwrap) throws Throwable {
  YieldSite site = new YieldSite(type, unwrap == 1 ? true : false);
  MethodHandle handle;
  switch (name) {
    case "yield":
    case "yieldSpecific":
      handle = Binder.from(type)
          .prepend(YieldSite.class, site)
          .invokeVirtual(lookup, name);
      break;
    case "yieldValues":
      handle = Binder.from(type)
          .collect(2, IRubyObject[].class)
          .prepend(YieldSite.class, site)
          .invokeVirtual(lookup, name);
      break;
    default:
      throw new RuntimeException("invalid yield type: " + name);
  }
  site.setTarget(handle);
  return site;
}

public static CallSite bootstrap(MethodHandles.Lookup lookup, String name, MethodType type, int unwrap) throws Throwable {
  YieldSite site = new YieldSite(type, unwrap == 1 ? true : false);
  MethodHandle handle;
  switch (name) {
    case "yield":
    case "yieldSpecific":
      handle = Binder.from(type)
          .prepend(YieldSite.class, site)
          .invokeVirtual(lookup, name);
      break;
    case "yieldValues":
      handle = Binder.from(type)
          .collect(2, IRubyObject[].class)
          .prepend(YieldSite.class, site)
          .invokeVirtual(lookup, name);
      break;
    default:
      throw new RuntimeException("invalid yield type: " + name);
  }
  site.setTarget(handle);
  return site;
}

private static MethodHandle createAttrReaderHandle(InvokeSite site, IRubyObject self, RubyClass cls, VariableAccessor accessor) {
  MethodHandle nativeTarget;
  MethodHandle filter = cls.getClassRuntime().getNullToNilHandle();
  MethodHandle getValue;
  if (accessor instanceof FieldVariableAccessor) {
    MethodHandle getter = ((FieldVariableAccessor)accessor).getGetter();
    getValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(Object.class, self.getClass()))
        .invoke(getter);
  } else {
    getValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(Object.class, Object.class))
        .prepend(accessor)
        .invokeVirtualQuiet(LOOKUP, "get");
  }
  // NOTE: Must not cache the fully-bound handle in the method, since it's specific to this class
  return getValue;
}

private static MethodHandle createAttrReaderHandle(InvokeSite site, IRubyObject self, RubyClass cls, VariableAccessor accessor) {
  MethodHandle nativeTarget;
  MethodHandle filter = cls.getClassRuntime().getNullToNilHandle();
  MethodHandle getValue;
  if (accessor instanceof FieldVariableAccessor) {
    MethodHandle getter = ((FieldVariableAccessor)accessor).getGetter();
    getValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(Object.class, self.getClass()))
        .invoke(getter);
  } else {
    getValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(Object.class, Object.class))
        .prepend(accessor)
        .invokeVirtualQuiet(LOOKUP, "get");
  }
  // NOTE: Must not cache the fully-bound handle in the method, since it's specific to this class
  return getValue;
}

private static MethodHandle createAttrWriterHandle(InvokeSite site, IRubyObject self, RubyClass cls, VariableAccessor accessor) {
  MethodHandle nativeTarget;
  MethodHandle filter = Binder
      .from(IRubyObject.class, Object.class)
      .drop(0)
      .constant(cls.getRuntime().getNil());
  MethodHandle setValue;
  if (accessor instanceof FieldVariableAccessor) {
    MethodHandle setter = ((FieldVariableAccessor)accessor).getSetter();
    setValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(void.class, self.getClass(), Object.class))
        .invoke(setter);
  } else {
    setValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(void.class, Object.class, Object.class))
        .prepend(accessor)
        .invokeVirtualQuiet(LOOKUP, "set");
  }
  return setValue;
}

private static MethodHandle createAttrWriterHandle(InvokeSite site, IRubyObject self, RubyClass cls, VariableAccessor accessor) {
  MethodHandle nativeTarget;
  MethodHandle filter = Binder
      .from(IRubyObject.class, Object.class)
      .drop(0)
      .constant(cls.getRuntime().getNil());
  MethodHandle setValue;
  if (accessor instanceof FieldVariableAccessor) {
    MethodHandle setter = ((FieldVariableAccessor)accessor).getSetter();
    setValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(void.class, self.getClass(), Object.class))
        .invoke(setter);
  } else {
    setValue = Binder.from(site.type())
        .drop(0, 2)
        .filterReturn(filter)
        .cast(methodType(void.class, Object.class, Object.class))
        .prepend(accessor)
        .invokeVirtualQuiet(LOOKUP, "set");
  }
  return setValue;
}