Examples with DirectMethodHandleDesc java.lang.constant.DirectMethodHandleDesc used on opensource projects

Example 1 with DirectMethodHandleDesc

use of java.lang.constant.DirectMethodHandleDesc in project openj9 by eclipse.

the class Test_DynamicCallSiteDesc method testDynamicCallSiteDescResolveCallSiteDesc.

/*
	 * Test Java 12 API DynamicCallSiteDesc.resolveCallSiteDesc()
	 */
@Test(groups = { "level.sanity" })
public void testDynamicCallSiteDescResolveCallSiteDesc() throws Throwable {
    /* setup */
    ClassDesc bsmOwnerDesc = Test_DynamicCallSiteDesc.class.describeConstable().orElseThrow();
    ClassDesc bsmRetTypeDesc = ConstantCallSite.class.describeConstable().orElseThrow();
    MethodTypeDesc handleType = MethodType.methodType(void.class).describeConstable().orElseThrow();
    /* describe and resolve callsite */
    DirectMethodHandleDesc bsm = ConstantDescs.ofCallsiteBootstrap(bsmOwnerDesc, "bsm", bsmRetTypeDesc);
    DynamicCallSiteDesc desc = DynamicCallSiteDesc.of(bsm, fieldName, handleType);
    CallSite resolvedSite = desc.resolveCallSiteDesc(MethodHandles.lookup());
    /* verify that the callsite contains the expected MethodHandle */
    logger.debug("testDynamicCallSiteDescResolveCallSiteDesc: resolved CallSite type is: " + resolvedSite.type().toMethodDescriptorString());
    Assert.assertTrue(fieldName.equals((String) resolvedSite.getTarget().invokeExact()));
}