/*
* 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.operator.aggregation;
import com.facebook.presto.bytecode.DynamicClassLoader;
import com.facebook.presto.metadata.BoundVariables;
import com.facebook.presto.metadata.FunctionRegistry;
import com.facebook.presto.metadata.SqlAggregationFunction;
import com.facebook.presto.operator.aggregation.state.BlockState;
import com.facebook.presto.operator.aggregation.state.BlockStateSerializer;
import com.facebook.presto.operator.aggregation.state.NullableBooleanState;
import com.facebook.presto.operator.aggregation.state.NullableDoubleState;
import com.facebook.presto.operator.aggregation.state.NullableLongState;
import com.facebook.presto.operator.aggregation.state.SliceState;
import com.facebook.presto.operator.aggregation.state.StateCompiler;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.function.AccumulatorState;
import com.facebook.presto.spi.function.AccumulatorStateFactory;
import com.facebook.presto.spi.function.AccumulatorStateSerializer;
import com.facebook.presto.spi.function.OperatorType;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.spi.type.TypeManager;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableList;
import io.airlift.slice.Slice;
import java.lang.invoke.MethodHandle;
import java.util.List;
import static com.facebook.presto.metadata.Signature.internalOperator;
import static com.facebook.presto.metadata.Signature.orderableTypeParameter;
import static com.facebook.presto.operator.aggregation.AggregationMetadata.ParameterMetadata;
import static com.facebook.presto.operator.aggregation.AggregationMetadata.ParameterMetadata.ParameterType.INPUT_CHANNEL;
import static com.facebook.presto.operator.aggregation.AggregationMetadata.ParameterMetadata.ParameterType.STATE;
import static com.facebook.presto.operator.aggregation.AggregationUtils.generateAggregationName;
import static com.facebook.presto.spi.StandardErrorCode.GENERIC_INTERNAL_ERROR;
import static com.facebook.presto.spi.type.BooleanType.BOOLEAN;
import static com.facebook.presto.spi.type.TypeSignature.parseTypeSignature;
import static com.facebook.presto.util.Reflection.methodHandle;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static java.util.Objects.requireNonNull;
public abstract class AbstractMinMaxAggregationFunction
extends SqlAggregationFunction
{
private static final MethodHandle LONG_INPUT_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "input", MethodHandle.class, NullableLongState.class, long.class);
private static final MethodHandle DOUBLE_INPUT_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "input", MethodHandle.class, NullableDoubleState.class, double.class);
private static final MethodHandle SLICE_INPUT_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "input", MethodHandle.class, SliceState.class, Slice.class);
private static final MethodHandle BOOLEAN_INPUT_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "input", MethodHandle.class, NullableBooleanState.class, boolean.class);
private static final MethodHandle BLOCK_INPUT_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "input", MethodHandle.class, BlockState.class, Block.class);
private static final MethodHandle LONG_OUTPUT_FUNCTION = methodHandle(NullableLongState.class, "write", Type.class, NullableLongState.class, BlockBuilder.class);
private static final MethodHandle DOUBLE_OUTPUT_FUNCTION = methodHandle(NullableDoubleState.class, "write", Type.class, NullableDoubleState.class, BlockBuilder.class);
private static final MethodHandle SLICE_OUTPUT_FUNCTION = methodHandle(SliceState.class, "write", Type.class, SliceState.class, BlockBuilder.class);
private static final MethodHandle BOOLEAN_OUTPUT_FUNCTION = methodHandle(NullableBooleanState.class, "write", Type.class, NullableBooleanState.class, BlockBuilder.class);
private static final MethodHandle BLOCK_OUTPUT_FUNCTION = methodHandle(BlockState.class, "write", Type.class, BlockState.class, BlockBuilder.class);
private static final MethodHandle LONG_COMBINE_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "combine", MethodHandle.class, NullableLongState.class, NullableLongState.class);
private static final MethodHandle DOUBLE_COMBINE_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "combine", MethodHandle.class, NullableDoubleState.class, NullableDoubleState.class);
private static final MethodHandle SLICE_COMBINE_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "combine", MethodHandle.class, SliceState.class, SliceState.class);
private static final MethodHandle BOOLEAN_COMBINE_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "combine", MethodHandle.class, NullableBooleanState.class, NullableBooleanState.class);
private static final MethodHandle BLOCK_COMBINE_FUNCTION = methodHandle(AbstractMinMaxAggregationFunction.class, "combine", MethodHandle.class, BlockState.class, BlockState.class);
private final OperatorType operatorType;
protected AbstractMinMaxAggregationFunction(String name, OperatorType operatorType)
{
super(name,
ImmutableList.of(orderableTypeParameter("E")),
ImmutableList.of(),
parseTypeSignature("E"),
ImmutableList.of(parseTypeSignature("E")));
requireNonNull(operatorType);
this.operatorType = operatorType;
}
@Override
public InternalAggregationFunction specialize(BoundVariables boundVariables, int arity, TypeManager typeManager, FunctionRegistry functionRegistry)
{
Type type = boundVariables.getTypeVariable("E");
MethodHandle compareMethodHandle = functionRegistry.getScalarFunctionImplementation(internalOperator(operatorType, BOOLEAN, ImmutableList.of(type, type))).getMethodHandle();
return generateAggregation(type, compareMethodHandle);
}
protected InternalAggregationFunction generateAggregation(Type type, MethodHandle compareMethodHandle)
{
DynamicClassLoader classLoader = new DynamicClassLoader(AbstractMinMaxAggregationFunction.class.getClassLoader());
List<Type> inputTypes = ImmutableList.of(type);
MethodHandle inputFunction;
MethodHandle combineFunction;
MethodHandle outputFunction;
Class<? extends AccumulatorState> stateInterface;
AccumulatorStateSerializer<?> stateSerializer;
if (type.getJavaType() == long.class) {
stateInterface = NullableLongState.class;
stateSerializer = StateCompiler.generateStateSerializer(stateInterface, classLoader);
inputFunction = LONG_INPUT_FUNCTION;
combineFunction = LONG_COMBINE_FUNCTION;
outputFunction = LONG_OUTPUT_FUNCTION;
}
else if (type.getJavaType() == double.class) {
stateInterface = NullableDoubleState.class;
stateSerializer = StateCompiler.generateStateSerializer(stateInterface, classLoader);
inputFunction = DOUBLE_INPUT_FUNCTION;
combineFunction = DOUBLE_COMBINE_FUNCTION;
outputFunction = DOUBLE_OUTPUT_FUNCTION;
}
else if (type.getJavaType() == Slice.class) {
stateInterface = SliceState.class;
stateSerializer = StateCompiler.generateStateSerializer(stateInterface, classLoader);
inputFunction = SLICE_INPUT_FUNCTION;
combineFunction = SLICE_COMBINE_FUNCTION;
outputFunction = SLICE_OUTPUT_FUNCTION;
}
else if (type.getJavaType() == boolean.class) {
stateInterface = NullableBooleanState.class;
stateSerializer = StateCompiler.generateStateSerializer(stateInterface, classLoader);
inputFunction = BOOLEAN_INPUT_FUNCTION;
combineFunction = BOOLEAN_COMBINE_FUNCTION;
outputFunction = BOOLEAN_OUTPUT_FUNCTION;
}
else {
stateInterface = BlockState.class;
stateSerializer = new BlockStateSerializer(type);
inputFunction = BLOCK_INPUT_FUNCTION;
combineFunction = BLOCK_COMBINE_FUNCTION;
outputFunction = BLOCK_OUTPUT_FUNCTION;
}
inputFunction = inputFunction.bindTo(compareMethodHandle);
combineFunction = combineFunction.bindTo(compareMethodHandle);
outputFunction = outputFunction.bindTo(type);
AccumulatorStateFactory<?> stateFactory = StateCompiler.generateStateFactory(stateInterface, classLoader);
Type intermediateType = stateSerializer.getSerializedType();
AggregationMetadata metadata = new AggregationMetadata(
generateAggregationName(getSignature().getName(), type.getTypeSignature(), inputTypes.stream().map(Type::getTypeSignature).collect(toImmutableList())),
createParameterMetadata(type),
inputFunction,
combineFunction,
outputFunction,
stateInterface,
stateSerializer,
stateFactory,
type);
GenericAccumulatorFactoryBinder factory = AccumulatorCompiler.generateAccumulatorFactoryBinder(metadata, classLoader);
return new InternalAggregationFunction(getSignature().getName(), inputTypes, intermediateType, type, true, factory);
}
private static List<ParameterMetadata> createParameterMetadata(Type type)
{
return ImmutableList.of(
new ParameterMetadata(STATE),
new ParameterMetadata(INPUT_CHANNEL, type));
}
public static void input(MethodHandle methodHandle, NullableDoubleState state, double value)
{
if (state.isNull()) {
state.setNull(false);
state.setDouble(value);
return;
}
try {
if ((boolean) methodHandle.invokeExact(value, state.getDouble())) {
state.setDouble(value);
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void input(MethodHandle methodHandle, NullableLongState state, long value)
{
if (state.isNull()) {
state.setNull(false);
state.setLong(value);
return;
}
try {
if ((boolean) methodHandle.invokeExact(value, state.getLong())) {
state.setLong(value);
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void input(MethodHandle methodHandle, SliceState state, Slice value)
{
if (state.getSlice() == null) {
state.setSlice(value);
return;
}
try {
if ((boolean) methodHandle.invokeExact(value, state.getSlice())) {
state.setSlice(value);
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void input(MethodHandle methodHandle, NullableBooleanState state, boolean value)
{
if (state.isNull()) {
state.setNull(false);
state.setBoolean(value);
return;
}
try {
if ((boolean) methodHandle.invokeExact(value, state.getBoolean())) {
state.setBoolean(value);
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void input(MethodHandle methodHandle, BlockState state, Block value)
{
if (state.getBlock() == null) {
state.setBlock(value);
return;
}
try {
if ((boolean) methodHandle.invokeExact(value, state.getBlock())) {
state.setBlock(value);
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void combine(MethodHandle methodHandle, NullableLongState state, NullableLongState otherState)
{
if (state.isNull()) {
state.setNull(false);
state.setLong(otherState.getLong());
return;
}
try {
if ((boolean) methodHandle.invokeExact(otherState.getLong(), state.getLong())) {
state.setLong(otherState.getLong());
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void combine(MethodHandle methodHandle, NullableDoubleState state, NullableDoubleState otherState)
{
if (state.isNull()) {
state.setNull(false);
state.setDouble(otherState.getDouble());
return;
}
try {
if ((boolean) methodHandle.invokeExact(otherState.getDouble(), state.getDouble())) {
state.setDouble(otherState.getDouble());
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void combine(MethodHandle methodHandle, NullableBooleanState state, NullableBooleanState otherState)
{
if (state.isNull()) {
state.setNull(false);
state.setBoolean(otherState.getBoolean());
return;
}
try {
if ((boolean) methodHandle.invokeExact(otherState.getBoolean(), state.getBoolean())) {
state.setBoolean(otherState.getBoolean());
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void combine(MethodHandle methodHandle, SliceState state, SliceState otherState)
{
if (state.getSlice() == null) {
state.setSlice(otherState.getSlice());
return;
}
try {
if ((boolean) methodHandle.invokeExact(otherState.getSlice(), state.getSlice())) {
state.setSlice(otherState.getSlice());
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
public static void combine(MethodHandle methodHandle, BlockState state, BlockState otherState)
{
if (state.getBlock() == null) {
state.setBlock(otherState.getBlock());
return;
}
try {
if ((boolean) methodHandle.invokeExact(otherState.getBlock(), state.getBlock())) {
state.setBlock(otherState.getBlock());
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
}