/*
* 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.type;
import com.facebook.presto.spi.function.IsNull;
import com.facebook.presto.spi.function.LiteralParameters;
import com.facebook.presto.spi.function.ScalarFunction;
import com.facebook.presto.spi.function.ScalarOperator;
import com.facebook.presto.spi.function.SqlType;
import com.facebook.presto.spi.type.StandardTypes;
import io.airlift.slice.Slice;
import io.airlift.slice.Slices;
import static com.facebook.presto.spi.function.OperatorType.BETWEEN;
import static com.facebook.presto.spi.function.OperatorType.CAST;
import static com.facebook.presto.spi.function.OperatorType.EQUAL;
import static com.facebook.presto.spi.function.OperatorType.GREATER_THAN;
import static com.facebook.presto.spi.function.OperatorType.GREATER_THAN_OR_EQUAL;
import static com.facebook.presto.spi.function.OperatorType.HASH_CODE;
import static com.facebook.presto.spi.function.OperatorType.IS_DISTINCT_FROM;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN_OR_EQUAL;
import static com.facebook.presto.spi.function.OperatorType.NOT_EQUAL;
import static java.lang.Float.floatToRawIntBits;
import static java.nio.charset.StandardCharsets.US_ASCII;
public final class BooleanOperators
{
private static final Slice TRUE = Slices.copiedBuffer("true", US_ASCII);
private static final Slice FALSE = Slices.copiedBuffer("false", US_ASCII);
private BooleanOperators()
{
}
@ScalarOperator(EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean equal(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
{
return left == right;
}
@ScalarOperator(NOT_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean notEqual(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
{
return left != right;
}
@ScalarOperator(LESS_THAN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThan(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
{
return !left && right;
}
@ScalarOperator(LESS_THAN_OR_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThanOrEqual(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
{
return !left || right;
}
@ScalarOperator(GREATER_THAN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean greaterThan(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
{
return left && !right;
}
@ScalarOperator(GREATER_THAN_OR_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean greaterThanOrEqual(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
{
return left || !right;
}
@ScalarOperator(BETWEEN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean between(@SqlType(StandardTypes.BOOLEAN) boolean value, @SqlType(StandardTypes.BOOLEAN) boolean min, @SqlType(StandardTypes.BOOLEAN) boolean max)
{
return (value && max) || (!value && !min);
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.DOUBLE)
public static double castToDouble(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? 1 : 0;
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.REAL)
public static long castToReal(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? floatToRawIntBits(1.0f) : floatToRawIntBits(0.0f);
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.BIGINT)
public static long castToBigint(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? 1 : 0;
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.INTEGER)
public static long castToInteger(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? 1 : 0;
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.SMALLINT)
public static long castToSmallint(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? 1 : 0;
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.TINYINT)
public static long castToTinyint(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? 1 : 0;
}
@ScalarOperator(CAST)
@LiteralParameters("x")
@SqlType("varchar(x)")
public static Slice castToVarchar(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? TRUE : FALSE;
}
@ScalarOperator(HASH_CODE)
@SqlType(StandardTypes.BIGINT)
public static long hashCode(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return value ? 1231 : 1237;
}
@SqlType(StandardTypes.BOOLEAN)
@ScalarFunction(hidden = true) // TODO: this should not be callable from SQL
public static boolean not(@SqlType(StandardTypes.BOOLEAN) boolean value)
{
return !value;
}
@ScalarOperator(IS_DISTINCT_FROM)
@SqlType(StandardTypes.BOOLEAN)
public static boolean isDistinctFrom(
@SqlType(StandardTypes.BOOLEAN) boolean left,
@IsNull boolean leftNull,
@SqlType(StandardTypes.BOOLEAN) boolean right,
@IsNull boolean rightNull)
{
if (leftNull != rightNull) {
return true;
}
if (leftNull) {
return false;
}
return notEqual(left, right);
}
}