/*
* 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.spi.PrestoException;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.function.Description;
import com.facebook.presto.spi.function.OperatorDependency;
import com.facebook.presto.spi.function.ScalarFunction;
import com.facebook.presto.spi.function.SqlNullable;
import com.facebook.presto.spi.function.SqlType;
import com.facebook.presto.spi.function.TypeParameter;
import com.facebook.presto.spi.type.StandardTypes;
import com.facebook.presto.spi.type.Type;
import com.google.common.base.Throwables;
import io.airlift.slice.Slice;
import java.lang.invoke.MethodHandle;
import static com.facebook.presto.spi.StandardErrorCode.GENERIC_INTERNAL_ERROR;
import static com.facebook.presto.spi.function.OperatorType.EQUAL;
@Description("Returns the position of the first occurrence of the given value in array (or 0 if not found)")
@ScalarFunction("array_position")
public final class ArrayPositionFunction
{
private ArrayPositionFunction() {}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(@TypeParameter("T") Type type,
@OperatorDependency(operator = EQUAL, returnType = StandardTypes.BOOLEAN, argumentTypes = {"T", "T"}) MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") boolean element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
boolean arrayValue = type.getBoolean(array, i);
try {
if ((boolean) equalMethodHandle.invokeExact(arrayValue, element)) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
}
return 0;
}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(@TypeParameter("T") Type type,
@OperatorDependency(operator = EQUAL, returnType = StandardTypes.BOOLEAN, argumentTypes = {"T", "T"}) MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") long element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
long arrayValue = type.getLong(array, i);
try {
if ((boolean) equalMethodHandle.invokeExact(arrayValue, element)) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
}
return 0;
}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(@TypeParameter("T") Type type,
@OperatorDependency(operator = EQUAL, returnType = StandardTypes.BOOLEAN, argumentTypes = {"T", "T"}) MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") double element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
double arrayValue = type.getDouble(array, i);
try {
if ((boolean) equalMethodHandle.invokeExact(arrayValue, element)) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
}
return 0;
}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(@TypeParameter("T") Type type,
@OperatorDependency(operator = EQUAL, returnType = StandardTypes.BOOLEAN, argumentTypes = {"T", "T"}) MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") Slice element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
Slice arrayValue = type.getSlice(array, i);
try {
if ((boolean) equalMethodHandle.invokeExact(arrayValue, element)) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
}
return 0;
}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(@TypeParameter("T") Type type,
@OperatorDependency(operator = EQUAL, returnType = StandardTypes.BOOLEAN, argumentTypes = {"T", "T"}) MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") Block element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
Object arrayValue = type.getObject(array, i);
try {
if ((boolean) equalMethodHandle.invoke(arrayValue, element)) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
Throwables.propagateIfInstanceOf(t, Error.class);
Throwables.propagateIfInstanceOf(t, PrestoException.class);
throw new PrestoException(GENERIC_INTERNAL_ERROR, t);
}
}
}
return 0;
}
@SqlType(StandardTypes.BIGINT)
@SqlNullable
public static Long arrayPosition(@SqlType("array(unknown)") Block array, @SqlNullable @SqlType("unknown") Void element)
{
return null;
}
}