package com.facebook.presto.operator.scalar;
/*
* 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.
*/
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.function.OperatorDependency;
import com.facebook.presto.spi.function.ScalarOperator;
import com.facebook.presto.spi.function.SqlType;
import com.facebook.presto.spi.function.TypeParameter;
import com.facebook.presto.spi.function.TypeParameterSpecialization;
import com.facebook.presto.spi.type.StandardTypes;
import com.facebook.presto.spi.type.Type;
import com.google.common.base.Throwables;
import java.lang.invoke.MethodHandle;
import static com.facebook.presto.spi.StandardErrorCode.GENERIC_INTERNAL_ERROR;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN;
import static com.facebook.presto.spi.type.TypeUtils.readNativeValue;
import static com.facebook.presto.type.ArrayType.ARRAY_NULL_ELEMENT_MSG;
import static com.facebook.presto.type.TypeUtils.checkElementNotNull;
@ScalarOperator(LESS_THAN)
public final class ArrayLessThanOperator
{
private ArrayLessThanOperator() {}
@TypeParameter("E")
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThan(
@OperatorDependency(operator = LESS_THAN, returnType = StandardTypes.BOOLEAN, argumentTypes = {"E", "E"}) MethodHandle lessThanFunction,
@TypeParameter("E") Type type,
@SqlType("array(E)") Block leftArray,
@SqlType("array(E)") Block rightArray)
{
int len = Math.min(leftArray.getPositionCount(), rightArray.getPositionCount());
int index = 0;
while (index < len) {
checkElementNotNull(leftArray.isNull(index), ARRAY_NULL_ELEMENT_MSG);
checkElementNotNull(rightArray.isNull(index), ARRAY_NULL_ELEMENT_MSG);
Object leftElement = readNativeValue(type, leftArray, index);
Object rightElement = readNativeValue(type, rightArray, index);
try {
if ((boolean) lessThanFunction.invoke(leftElement, rightElement)) {
return true;
}
if ((boolean) lessThanFunction.invoke(rightElement, leftElement)) {
return false;
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
index++;
}
return leftArray.getPositionCount() < rightArray.getPositionCount();
}
@TypeParameter("E")
@TypeParameterSpecialization(name = "E", nativeContainerType = long.class)
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThanLong(
@OperatorDependency(operator = LESS_THAN, returnType = StandardTypes.BOOLEAN, argumentTypes = {"E", "E"}) MethodHandle lessThanFunction,
@TypeParameter("E") Type type,
@SqlType("array(E)") Block leftArray,
@SqlType("array(E)") Block rightArray)
{
int len = Math.min(leftArray.getPositionCount(), rightArray.getPositionCount());
int index = 0;
while (index < len) {
checkElementNotNull(leftArray.isNull(index), ARRAY_NULL_ELEMENT_MSG);
checkElementNotNull(rightArray.isNull(index), ARRAY_NULL_ELEMENT_MSG);
long leftElement = type.getLong(leftArray, index);
long rightElement = type.getLong(rightArray, index);
try {
if ((boolean) lessThanFunction.invokeExact(leftElement, rightElement)) {
return true;
}
if ((boolean) lessThanFunction.invokeExact(rightElement, leftElement)) {
return false;
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
index++;
}
return leftArray.getPositionCount() < rightArray.getPositionCount();
}
}