/*
* 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.scalar;
import com.facebook.presto.annotation.UsedByGeneratedCode;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.type.Type;
import io.airlift.slice.Slice;
import java.lang.invoke.MethodHandle;
import static com.facebook.presto.spi.StandardErrorCode.GENERIC_INTERNAL_ERROR;
import static com.google.common.base.Throwables.propagateIfInstanceOf;
public final class ArrayMinMaxUtils
{
private ArrayMinMaxUtils() {}
@UsedByGeneratedCode
public static Long longArrayMinMax(MethodHandle compareMethodHandle, Type elementType, Block block)
{
try {
if (block.getPositionCount() == 0) {
return null;
}
long selectedValue = elementType.getLong(block, 0);
for (int i = 0; i < block.getPositionCount(); i++) {
if (block.isNull(i)) {
return null;
}
long value = elementType.getLong(block, i);
if ((boolean) compareMethodHandle.invokeExact(value, selectedValue)) {
selectedValue = value;
}
}
return selectedValue;
}
catch (Throwable t) {
propagateIfInstanceOf(t, Error.class);
propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
@UsedByGeneratedCode
public static Boolean booleanArrayMinMax(MethodHandle compareMethodHandle, Type elementType, Block block)
{
try {
if (block.getPositionCount() == 0) {
return null;
}
boolean selectedValue = elementType.getBoolean(block, 0);
for (int i = 0; i < block.getPositionCount(); i++) {
if (block.isNull(i)) {
return null;
}
boolean value = elementType.getBoolean(block, i);
if ((boolean) compareMethodHandle.invokeExact(value, selectedValue)) {
selectedValue = value;
}
}
return selectedValue;
}
catch (Throwable t) {
propagateIfInstanceOf(t, Error.class);
propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
@UsedByGeneratedCode
public static Double doubleArrayMinMax(MethodHandle compareMethodHandle, Type elementType, Block block)
{
try {
if (block.getPositionCount() == 0) {
return null;
}
double selectedValue = elementType.getDouble(block, 0);
for (int i = 0; i < block.getPositionCount(); i++) {
if (block.isNull(i)) {
return null;
}
double value = elementType.getDouble(block, i);
if ((boolean) compareMethodHandle.invokeExact(value, selectedValue)) {
selectedValue = value;
}
}
return selectedValue;
}
catch (Throwable t) {
propagateIfInstanceOf(t, Error.class);
propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
@UsedByGeneratedCode
public static Slice sliceArrayMinMax(MethodHandle compareMethodHandle, Type elementType, Block block)
{
try {
if (block.getPositionCount() == 0) {
return null;
}
Slice selectedValue = elementType.getSlice(block, 0);
for (int i = 0; i < block.getPositionCount(); i++) {
if (block.isNull(i)) {
return null;
}
Slice value = elementType.getSlice(block, i);
if ((boolean) compareMethodHandle.invokeExact(value, selectedValue)) {
selectedValue = value;
}
}
return selectedValue;
}
catch (Throwable t) {
propagateIfInstanceOf(t, Error.class);
propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
}