/*
* 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.block;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockEncoding;
import com.facebook.presto.spi.block.BlockEncodingSerde;
import io.airlift.slice.Slice;
import io.airlift.slice.SliceInput;
import io.airlift.slice.SliceOutput;
import java.lang.invoke.MethodHandle;
import static com.facebook.presto.util.Reflection.methodHandle;
public final class BlockSerdeUtil
{
public static final MethodHandle READ_BLOCK = methodHandle(BlockSerdeUtil.class, "readBlock", BlockEncodingSerde.class, Slice.class);
private BlockSerdeUtil()
{
}
public static Block readBlock(BlockEncodingSerde blockEncodingSerde, Slice slice)
{
return readBlock(blockEncodingSerde, slice.getInput());
}
public static Block readBlock(BlockEncodingSerde blockEncodingSerde, SliceInput input)
{
BlockEncoding blockEncoding = blockEncodingSerde.readBlockEncoding(input);
return blockEncoding.readBlock(input);
}
public static void writeBlock(BlockEncodingSerde blockEncodingSerde, SliceOutput output, Block block)
{
BlockEncoding encoding = block.getEncoding();
blockEncodingSerde.writeBlockEncoding(output, encoding);
encoding.writeBlock(output, block);
}
// This class is only used in LiteralInterpreter for magic literal. Most likely, you shouldn't use it from anywhere else.
public static void writeBlock(SliceOutput output, Block block)
{
BlockEncoding encoding = block.getEncoding();
BlockEncodingManager.writeBlockEncodingInternal(output, encoding);
encoding.writeBlock(output, block);
}
}