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/*
* (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
*
* 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.palantir.atlasdb.keyvalue.cassandra.thrift;
import com.palantir.atlasdb.encoding.PtBytes;
import com.palantir.atlasdb.keyvalue.cassandra.CassandraKeyValueServices;
import java.nio.ByteBuffer;
import org.apache.cassandra.thrift.SlicePredicate;
import org.apache.cassandra.thrift.SliceRange;
import org.immutables.value.Value;
public final class SlicePredicates {
private SlicePredicates() {}
public static SlicePredicate latestVersionForColumn(byte[] columnName, long maxTimestampExclusive) {
return create(Range.singleColumn(columnName, maxTimestampExclusive), Limit.ONE);
}
public static SlicePredicate rangeTombstoneForColumn(byte[] columnName, long maxTimestampExclusive) {
return create(
Range.of(
Range.startOfColumn(columnName, maxTimestampExclusive),
Range.endOfColumnExcludingSentinels(columnName)),
Limit.NO_LIMIT);
}
public static SlicePredicate rangeTombstoneIncludingSentinelForColumn(
byte[] columnName, long maxTimestampExclusive) {
return create(
Range.of(
Range.startOfColumn(columnName, maxTimestampExclusive),
Range.endOfColumnIncludingSentinels(columnName)),
Limit.NO_LIMIT);
}
public static SlicePredicate create(Range range, Limit limit) {
SliceRange slice = new SliceRange(range.start(), range.end(), false, limit.value());
SlicePredicate predicate = new SlicePredicate();
predicate.setSlice_range(slice);
return predicate;
}
@Value.Immutable
public interface Range {
ByteBuffer UNBOUND_START = ByteBuffer.wrap(PtBytes.EMPTY_BYTE_ARRAY);
ByteBuffer UNBOUND_END = ByteBuffer.wrap(PtBytes.EMPTY_BYTE_ARRAY);
Range ALL = Range.of(UNBOUND_START, UNBOUND_END);
static Range singleColumn(byte[] columnName, long maxTimestampExclusive) {
ByteBuffer start = startOfColumn(columnName, maxTimestampExclusive);
ByteBuffer end = endOfColumnIncludingSentinels(columnName);
return of(start, end);
}
static ByteBuffer startOfColumn(byte[] columnName, long maxTimestampExclusive) {
return CassandraKeyValueServices.makeCompositeBuffer(columnName, maxTimestampExclusive - 1);
}
static ByteBuffer endOfColumnIncludingSentinels(byte[] columnName) {
return CassandraKeyValueServices.makeCompositeBuffer(columnName, -1);
}
static ByteBuffer endOfColumnExcludingSentinels(byte[] columnName) {
return CassandraKeyValueServices.makeCompositeBuffer(columnName, 0);
}
static Range of(ByteBuffer startInclusive, ByteBuffer endInclusive) {
return ImmutableRange.builder()
.start(startInclusive)
.end(endInclusive)
.build();
}
ByteBuffer start();
ByteBuffer end();
}
@Value.Immutable
public interface Limit {
Limit ZERO = Limit.of(0);
Limit ONE = Limit.of(1);
Limit NO_LIMIT = Limit.of(Integer.MAX_VALUE);
static Limit of(int limit) {
return ImmutableLimit.builder().value(limit).build();
}
int value();
}
}