/*
* Copyright 2012-2014 Institut National des Sciences Appliquées de Lyon (INSA-Lyon)
*
* Licensed 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 fr.insalyon.citi.golo.runtime;
import org.testng.annotations.Test;
import java.lang.invoke.CallSite;
import java.lang.invoke.MethodHandle;
import static java.lang.invoke.MethodHandles.lookup;
import static java.lang.invoke.MethodType.genericMethodType;
import static java.lang.invoke.MethodType.methodType;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
public class ClosureCallSupportTest {
static Object objectToString(Object foo) {
return foo.toString();
}
static Object objectToStringDecorated(Object foo) {
return "[" + foo.toString() + "]";
}
static Object concat(Object... args) {
String result = "";
for (Object arg : args) {
result = result + arg;
}
return result;
}
@Test
public void check_bootstrap() throws Throwable {
MethodHandle handle = lookup().findStatic(ClosureCallSupportTest.class, "objectToString", genericMethodType(1));
CallSite callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class));
MethodHandle invoker = callSite.dynamicInvoker();
assertThat((String) invoker.invokeWithArguments(handle, 123), is("123"));
assertThat((String) invoker.invokeWithArguments(handle, 123), is("123"));
handle = lookup().findStatic(ClosureCallSupportTest.class, "objectToStringDecorated", genericMethodType(1));
assertThat((String) invoker.invokeWithArguments(handle, 123), is("[123]"));
assertThat((String) invoker.invokeWithArguments(handle, 123), is("[123]"));
}
@Test
public void check_bootstrap_varargs() throws Throwable {
MethodHandle handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
CallSite callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class, Object.class));
MethodHandle invoker = callSite.dynamicInvoker();
assertThat((String) invoker.invokeWithArguments(handle, 1, 2), is("12"));
handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class));
invoker = callSite.dynamicInvoker();
assertThat((String) invoker.invokeWithArguments(handle, 1), is("1"));
handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class));
invoker = callSite.dynamicInvoker();
assertThat((String) invoker.invokeWithArguments(handle), is(""));
handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class));
invoker = callSite.dynamicInvoker();
assertThat((String) invoker.invokeWithArguments(handle, new Object[]{1,2}), is("12"));
}
}