/*
* 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 com.facebook.presto.byteCode.expression;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableList;
import org.testng.annotations.Test;
import java.lang.invoke.CallSite;
import java.lang.invoke.ConstantCallSite;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Method;
import static com.facebook.presto.byteCode.expression.ByteCodeExpressionAssertions.assertByteCodeExpression;
import static com.facebook.presto.byteCode.expression.ByteCodeExpressions.constantString;
import static com.facebook.presto.byteCode.expression.ByteCodeExpressions.invokeDynamic;
public class TestInvokeDynamicByteCodeExpression
{
@Test
public void testInvokeStaticMethod()
throws Exception
{
assertByteCodeExpression(
invokeDynamic(TEST_BOOTSTRAP_METHOD, ImmutableList.of("bar"), "foo", String.class, constantString("baz")),
"foo-bar-baz",
"[bootstrap(\"bar\")]=>foo(\"baz\")");
}
public static final Method TEST_BOOTSTRAP_METHOD;
static {
try {
TEST_BOOTSTRAP_METHOD = TestInvokeDynamicByteCodeExpression.class.getMethod("bootstrap", MethodHandles.Lookup.class, String.class, MethodType.class, String.class);
}
catch (NoSuchMethodException e) {
throw Throwables.propagate(e);
}
}
public static CallSite bootstrap(MethodHandles.Lookup callerLookup, String name, MethodType type, String prefix)
throws Exception
{
MethodHandle methodHandle = callerLookup.findVirtual(String.class, "concat", MethodType.methodType(String.class, String.class));
methodHandle = methodHandle.bindTo(name + "-" + prefix + "-");
return new ConstantCallSite(methodHandle);
}
}