/*
* 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.tuple;
import com.facebook.presto.tuple.TupleInfo.Builder;
import io.airlift.slice.Slice;
import io.airlift.slice.Slices;
import static com.facebook.presto.tuple.TupleInfo.SINGLE_BOOLEAN;
import static com.facebook.presto.tuple.TupleInfo.SINGLE_DOUBLE;
import static com.facebook.presto.tuple.TupleInfo.SINGLE_LONG;
import static com.facebook.presto.tuple.TupleInfo.SINGLE_VARBINARY;
import static com.google.common.base.Charsets.UTF_8;
public class Tuples
{
public static final Tuple NULL_BOOLEAN_TUPLE = nullTuple(SINGLE_BOOLEAN);
public static final Tuple NULL_STRING_TUPLE = nullTuple(SINGLE_VARBINARY);
public static final Tuple NULL_LONG_TUPLE = nullTuple(SINGLE_LONG);
public static final Tuple NULL_DOUBLE_TUPLE = nullTuple(SINGLE_DOUBLE);
public static Tuple nullTuple(TupleInfo tupleInfo)
{
Builder builder = tupleInfo.builder();
for (int i = 0; i < tupleInfo.getFieldCount(); i++) {
builder.appendNull();
}
return builder.build();
}
public static Tuple createTuple(boolean value)
{
return SINGLE_BOOLEAN.builder()
.append(value)
.build();
}
public static Tuple createTuple(long value)
{
return SINGLE_LONG.builder()
.append(value)
.build();
}
public static Tuple createTuple(double value)
{
return SINGLE_DOUBLE.builder()
.append(value)
.build();
}
public static Tuple createTuple(String value)
{
return createTuple(Slices.wrappedBuffer(value.getBytes(UTF_8)));
}
public static Tuple createTuple(Slice value)
{
return SINGLE_VARBINARY.builder()
.append(value)
.build();
}
}