Example usage for java.lang.invoke MethodHandle invokeWithArguments

Introduction

In this page you can find the example usage for java.lang.invoke MethodHandle invokeWithArguments.

Prototype

public Object invokeWithArguments(java.util.List<?> arguments) throws Throwable 

Source Link

Document

Performs a variable arity invocation, passing the arguments in the given list to the method handle, as if via an inexact #invoke invoke from a call site which mentions only the type Object , and whose actual argument count is the length of the argument list.

Usage

From source file:org.diorite.config.impl.proxy.ConfigInvocationHandler.java

@Nullable
private Object invoke(Config proxy, Method method, Object[] args) throws Throwable {
    Function<Object[], Object> function = this.basicMethods.get(method);
    if (function != null) {
        return function.apply(args);
    }//from   www.  j av a 2s  .c  o  m
    // check for dispatcher:
    ConfigPropertyActionInstance actionFor = this.template.getActionFor(new MethodSignature(method));
    if (actionFor != null) {
        MethodInvoker methodInvoker = new MethodInvoker(method);
        ConfigPropertyTemplate<?> templateFor = this.template.getTemplateFor(actionFor);
        if (templateFor != null) {
            ConfigPropertyValueImpl<Object> propertyValue = this.getOrCreatePredefinedValue(templateFor);
            if (methodInvoker.getReturnType() == void.class) {
                this.registerVoidMethod(method, arg -> actionFor.perform(methodInvoker, propertyValue, arg));
                actionFor.perform(methodInvoker, propertyValue, args);
                return null;
            } else {
                this.registerMethod(method, arg -> actionFor.perform(methodInvoker, propertyValue, arg));
                return actionFor.perform(methodInvoker, propertyValue, args);
            }
        }
    }

    // check for default implementation
    try {
        MethodHandle methodHandle = DioriteReflectionUtils.createLookup(method.getDeclaringClass(), -1)
                .unreflectSpecial(method, method.getDeclaringClass()).bindTo(proxy);
        Object r = methodHandle.invokeWithArguments(args);
        this.registerMethod(method, (arg) -> {
            try {
                return methodHandle.invokeWithArguments(arg);
            } catch (Throwable throwable) {
                throw new RuntimeException(throwable);
            }
        });
        return r;
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        throw new RuntimeException(
                "Config class " + this.template.getConfigType() + " executed unknown method: " + method, e);
    }
}

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From source file:org.granitemc.granite.utils.Mappings.java

public static Object invoke(Object object, MethodHandle handle, Object... args) {
    try {//from w  w  w.  j  a v  a2 s .c  o m
        return handle.invokeWithArguments(ArrayUtils.add(args, 0, object));
    } catch (Throwable throwable) {
        throwable.printStackTrace();
    }
    return null;
}

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