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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
/**
* Proxy Invocation handler used to represent SCA component references.
*/
class InvocationHandler implements java.lang.reflect.InvocationHandler {
final long lambda;
InvocationHandler(final long lambda) {
this.lambda = lambda;
}
/**
* Create a proxy for an interface and the lambda function representing
* an SCA component reference.
*/
static Object valueOf(final Class<?> iface, final long lambda) {
return Proxy.newProxyInstance(iface.getClassLoader(), new Class[]{iface}, new InvocationHandler(lambda));
}
/**
* Proxy invocation of a C++ function.
*/
public native Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable;
/**
* Return the stack trace of an exception.
*/
static String stackTrace(final Throwable e) {
final StringWriter sw = new StringWriter();
final PrintWriter pw = new PrintWriter(sw);
e.printStackTrace(pw);
return sw.toString();
}
}
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