// warning ! stolen code ahead ! (http://code.google.com/p/jsr292-cookbook)
public static CallSite myBSM(Lookup lookup, String name, MethodType type, Class<?> staticType)
throws ReflectiveOperationException {
MethodHandle target = lookup.findStatic(staticType, name, type);
HashMap<String, HashMap<Object, Object>> cacheTable = cacheTables.get(staticType);
String selector = name + type.toMethodDescriptorString();
HashMap<Object, Object> cache = cacheTable.get(selector);
if (cache == null) {
cache = new HashMap<Object, Object>();
cacheTable.put(selector, cache);
}
MethodHandle identity = MethodHandles.identity(type.returnType());
identity = identity.asType(identity.type().changeParameterType(0, Object.class));
identity = MethodHandles.dropArguments(identity, 1, type.parameterType(0));
MethodHandle update = UPDATE.bindTo(cache);
update = update.asType(type.insertParameterTypes(0, type.returnType()));
MethodHandle fallback = MethodHandles.foldArguments(update, target);
fallback = MethodHandles.dropArguments(fallback, 0, Object.class);
MethodHandle combiner = MethodHandles.guardWithTest(NOT_NULL, identity, fallback);
MethodHandle cacheQuerier = MAP_GET.bindTo(cache);
cacheQuerier = cacheQuerier.asType(MethodType.methodType(Object.class, type.parameterType(0)));
MethodHandle memoize = MethodHandles.foldArguments(combiner, cacheQuerier);
return new ConstantCallSite(memoize);
}
public InvokeSite(MethodType type, String name, CallType callType) {
super(type);
this.methodName = name;
this.callType = callType;
Signature startSig;
if (callType == CallType.SUPER) {
// super calls receive current class argument, so offsets and signature are different
startSig = JRubyCallSite.STANDARD_SUPER_SIG;
argOffset = 4;
} else {
startSig = JRubyCallSite.STANDARD_SITE_SIG;
argOffset = 3;
}
int arity;
if (type.parameterType(type.parameterCount() - 1) == Block.class) {
arity = type.parameterCount() - (argOffset + 1);
if (arity == 1 && type.parameterType(argOffset) == IRubyObject[].class) {
arity = -1;
startSig = startSig.appendArg("args", IRubyObject[].class);
} else {
for (int i = 0; i < arity; i++) {
startSig = startSig.appendArg("arg" + i, IRubyObject.class);
}
}
startSig = startSig.appendArg("block", Block.class);
fullSignature = signature = startSig;
} else {
arity = type.parameterCount() - argOffset;
if (arity == 1 && type.parameterType(argOffset) == IRubyObject[].class) {
arity = -1;
startSig = startSig.appendArg("args", IRubyObject[].class);
} else {
for (int i = 0; i < arity; i++) {
startSig = startSig.appendArg("arg" + i, IRubyObject.class);
}
}
signature = startSig;
fullSignature = startSig.appendArg("block", Block.class);
}
this.arity = arity;
this.fallback = prepareBinder().invokeVirtualQuiet(Bootstrap.LOOKUP, "invoke");
}
public CatchExceptionTest(
TestCase testCase, final boolean isVararg, final int argsCount, final int catchDrops) {
this.testCase = testCase;
this.dropped = catchDrops;
if (Helper.IS_VERBOSE) {
System.out.printf(
"CatchException::CatchException(%s, isVararg=%b " + "argsCount=%d catchDrops=%d)%n",
testCase, isVararg, argsCount, catchDrops);
}
MethodHandle thrower = testCase.thrower;
int throwerLen = thrower.type().parameterCount();
List<Class<?>> classes;
int extra = Math.max(0, argsCount - throwerLen);
classes = getThrowerParams(isVararg, extra);
this.argsCount = throwerLen + classes.size();
thrower = Helper.addTrailingArgs(thrower, this.argsCount, classes);
if (isVararg && argsCount > throwerLen) {
MethodType mt = thrower.type();
Class<?> lastParam = mt.parameterType(mt.parameterCount() - 1);
thrower = thrower.asVarargsCollector(lastParam);
}
this.thrower = thrower;
this.dropped = Math.min(this.argsCount, catchDrops);
catcher = testCase.getCatcher(getCatcherParams());
nargs = Math.max(2, this.argsCount);
}
/*non-public*/
boolean isConvertibleTo(MethodType newType) {
if (!canConvert(returnType(), newType.returnType())) return false;
int argc = parameterCount();
if (argc != newType.parameterCount()) return false;
for (int i = 0; i < argc; i++) {
if (!canConvert(newType.parameterType(i), parameterType(i))) return false;
}
return true;
}
@Override
public CompletableFuture<?> execute(
Call call,
TransactionManager transactionManager,
Metadata metadata,
AccessControl accessControl,
QueryStateMachine stateMachine) {
if (!stateMachine.isAutoCommit()) {
throw new PrestoException(
NOT_SUPPORTED, "Procedures cannot be called within a transaction (use autocommit mode)");
}
Session session = stateMachine.getSession();
QualifiedObjectName procedureName = createQualifiedObjectName(session, call, call.getName());
Procedure procedure = metadata.getProcedureRegistry().resolve(procedureName);
// map declared argument names to positions
Map<String, Integer> positions = new HashMap<>();
for (int i = 0; i < procedure.getArguments().size(); i++) {
positions.put(procedure.getArguments().get(i).getName(), i);
}
// per specification, do not allow mixing argument types
Predicate<CallArgument> hasName = argument -> argument.getName().isPresent();
boolean anyNamed = call.getArguments().stream().anyMatch(hasName);
boolean allNamed = call.getArguments().stream().allMatch(hasName);
if (anyNamed && !allNamed) {
throw new SemanticException(
INVALID_PROCEDURE_ARGUMENTS, call, "Named and positional arguments cannot be mixed");
}
// get the argument names in call order
Map<String, CallArgument> names = new LinkedHashMap<>();
for (int i = 0; i < call.getArguments().size(); i++) {
CallArgument argument = call.getArguments().get(i);
if (argument.getName().isPresent()) {
String name = argument.getName().get();
if (names.put(name, argument) != null) {
throw new SemanticException(
INVALID_PROCEDURE_ARGUMENTS, argument, "Duplicate procedure argument: %s", name);
}
if (!positions.containsKey(name)) {
throw new SemanticException(
INVALID_PROCEDURE_ARGUMENTS, argument, "Unknown argument name: %s", name);
}
} else if (i < procedure.getArguments().size()) {
names.put(procedure.getArguments().get(i).getName(), argument);
} else {
throw new SemanticException(
INVALID_PROCEDURE_ARGUMENTS, call, "Too many arguments for procedure");
}
}
// verify argument count
if (names.size() < positions.size()) {
throw new SemanticException(
INVALID_PROCEDURE_ARGUMENTS, call, "Too few arguments for procedure");
}
// get argument values
Object[] values = new Object[procedure.getArguments().size()];
for (Entry<String, CallArgument> entry : names.entrySet()) {
CallArgument callArgument = entry.getValue();
int index = positions.get(entry.getKey());
Argument argument = procedure.getArguments().get(index);
Expression expression = callArgument.getValue();
Type type = argument.getType();
Object value = evaluateConstantExpression(expression, type, metadata, session);
values[index] = toTypeObjectValue(session, type, value);
}
// validate arguments
MethodType methodType = procedure.getMethodHandle().type();
for (int i = 0; i < procedure.getArguments().size(); i++) {
if ((values[i] == null) && methodType.parameterType(i).isPrimitive()) {
String name = procedure.getArguments().get(i).getName();
throw new PrestoException(
INVALID_PROCEDURE_ARGUMENT, "Procedure argument cannot be null: " + name);
}
}
// insert session argument
List<Object> arguments = new ArrayList<>();
Iterator<Object> valuesIterator = asList(values).iterator();
for (Class<?> type : methodType.parameterList()) {
if (ConnectorSession.class.isAssignableFrom(type)) {
arguments.add(session.toConnectorSession(procedureName.getCatalogName()));
} else {
arguments.add(valuesIterator.next());
}
}
try {
procedure.getMethodHandle().invokeWithArguments(arguments);
} catch (Throwable t) {
if (t instanceof InterruptedException) {
Thread.currentThread().interrupt();
}
propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(PROCEDURE_CALL_FAILED, t);
}
return completedFuture(null);
}
/**
* Reports the number of JVM stack slots which carry all parameters including and after the given
* position, which must be in the range of 0 to {@code parameterCount} inclusive. Successive
* parameters are more shallowly stacked, and parameters are indexed in the bytecodes according to
* their trailing edge. Thus, to obtain the depth in the outgoing call stack of parameter {@code
* N}, obtain the {@code parameterSlotDepth} of its trailing edge at position {@code N+1}.
*
* <p>Parameters of type {@code long} and {@code double} occupy two stack slots (for historical
* reasons) and all others occupy one. Therefore, the number returned is the number of arguments
* <em>including</em> and <em>after</em> the given parameter, <em>plus</em> the number of long or
* double arguments at or after after the argument for the given parameter.
*
* <p>This method is included for the benfit of applications that must generate bytecodes that
* process method handles and invokedynamic.
*
* @param num an index (zero-based, inclusive) within the parameter types
* @return the index of the (shallowest) JVM stack slot transmitting the given parameter
* @throws IllegalArgumentException if {@code num} is negative or greater than {@code
* parameterCount()}
*/
/*non-public*/ int parameterSlotDepth(int num) {
if (num < 0 || num > ptypes.length) parameterType(num); // force a range check
return form.parameterToArgSlot(num - 1);
}