com.facebook.presto.serde.TupleInfoSerde.java Source code

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Here is the source code for com.facebook.presto.serde.TupleInfoSerde.java

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/*
 * 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.serde;

import com.facebook.presto.tuple.TupleInfo;
import com.google.common.collect.ImmutableList;
import io.airlift.slice.SliceInput;
import io.airlift.slice.SliceOutput;

import static com.google.common.base.Preconditions.checkNotNull;

public final class TupleInfoSerde {
    private TupleInfoSerde() {
    }

    public static void writeTupleInfo(SliceOutput sliceOutput, TupleInfo tupleInfo) {
        checkNotNull(tupleInfo, "tupleInfo is null");
        checkNotNull(sliceOutput, "sliceOutput is null");

        sliceOutput.writeByte(tupleInfo.getFieldCount());

        for (TupleInfo.Type type : tupleInfo.getTypes()) {
            sliceOutput.writeByte(type.ordinal());
        }
    }

    public static TupleInfo readTupleInfo(SliceInput sliceInput) {
        checkNotNull(sliceInput, "sliceInput is null");

        int fieldCount = sliceInput.readUnsignedByte();
        ImmutableList.Builder<TupleInfo.Type> builder = ImmutableList.builder();
        for (int i = 0; i < fieldCount; i++) {
            builder.add(TupleInfo.Type.values()[sliceInput.readUnsignedByte()]);
        }
        return new TupleInfo(builder.build());
    }
}