io.trino.operator.SyntheticAddress Maven / Gradle / Ivy
/*
* 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 io.trino.operator;
/**
* Methods for creating and decoding synthetic addresses.
* A synthetic address is a physical position within an array of Slices. The address is encoded
* as a long with the high 32 bits containing the index of the slice in the array and the low 32
* bits containing an offset within the slice.
*/
public final class SyntheticAddress
{
private SyntheticAddress() {}
public static long encodeSyntheticAddress(int sliceIndex, int sliceOffset)
{
return (((long) sliceIndex) << 32) | sliceOffset;
}
public static int decodeSliceIndex(long sliceAddress)
{
return ((int) (sliceAddress >> 32));
}
public static int decodePosition(long sliceAddress)
{
// low order bits contain the raw offset, so a simple cast here will suffice
return (int) sliceAddress;
}
}