use of com.facebook.presto.bytecode.Access.STATIC in project presto by prestodb.
the class ConcatFunction method generateConcat.
private static Class<?> generateConcat(int arity) {
ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), CompilerUtils.makeClassName("Concat" + arity + "ScalarFunction"), type(Object.class));
// Generate constructor
definition.declareDefaultConstructor(a(PRIVATE));
// Generate concat()
List<Parameter> parameters = IntStream.range(0, arity).mapToObj(i -> arg("arg" + i, Slice.class)).collect(toImmutableList());
MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), "concat", type(Slice.class), parameters);
Scope scope = method.getScope();
BytecodeBlock body = method.getBody();
Variable length = scope.declareVariable(int.class, "length");
body.append(length.set(constantInt(0)));
for (int i = 0; i < arity; ++i) {
body.append(length.set(generateCheckedAdd(length, parameters.get(i).invoke("length", int.class))));
}
Variable result = scope.declareVariable(Slice.class, "result");
body.append(result.set(invokeStatic(Slices.class, "allocate", Slice.class, length)));
Variable position = scope.declareVariable(int.class, "position");
body.append(position.set(constantInt(0)));
for (int i = 0; i < arity; ++i) {
body.append(result.invoke("setBytes", void.class, position, parameters.get(i)));
body.append(position.set(add(position, parameters.get(i).invoke("length", int.class))));
}
body.getVariable(result).retObject();
return defineClass(definition, Object.class, ImmutableMap.of(), new DynamicClassLoader(ConcatFunction.class.getClassLoader()));
}
use of com.facebook.presto.bytecode.Access.STATIC in project presto by prestodb.
the class AbstractGreatestLeast method generate.
private Class<?> generate(List<Class<?>> javaTypes, Type type, MethodHandle compareMethod) {
String javaTypeName = javaTypes.stream().map(Class::getSimpleName).collect(joining());
ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), CompilerUtils.makeClassName(javaTypeName + "$" + getSignature().getName()), type(Object.class));
definition.declareDefaultConstructor(a(PRIVATE));
List<Parameter> parameters = IntStream.range(0, javaTypes.size()).mapToObj(i -> arg("arg" + i, javaTypes.get(i))).collect(toImmutableList());
MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), getSignature().getName(), type(javaTypes.get(0)), parameters);
Scope scope = method.getScope();
BytecodeBlock body = method.getBody();
CallSiteBinder binder = new CallSiteBinder();
if (type.getTypeSignature().getBase().equals(StandardTypes.DOUBLE)) {
for (Parameter parameter : parameters) {
body.append(parameter);
body.append(invoke(binder.bind(CHECK_NOT_NAN.bindTo(getSignature().getName())), "checkNotNaN"));
}
}
Variable value = scope.declareVariable(javaTypes.get(0), "value");
body.append(value.set(parameters.get(0)));
for (int i = 1; i < javaTypes.size(); i++) {
body.append(new IfStatement().condition(new BytecodeBlock().append(parameters.get(i)).append(value).append(invoke(binder.bind(compareMethod), "compare"))).ifTrue(value.set(parameters.get(i))));
}
body.append(value.ret());
return defineClass(definition, Object.class, binder.getBindings(), new DynamicClassLoader(getClass().getClassLoader()));
}
Aggregations