com.facebook.drift.codec.internal.builtin.ListThriftCodec Maven / Gradle / Ivy

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Annotation based encoder and decoder for Thrift

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/*
 * Copyright (C) 2012 Facebook, Inc.
 *
 * 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.drift.codec.internal.builtin;

import com.facebook.drift.codec.ThriftCodec;
import com.facebook.drift.codec.internal.ProtocolReader;
import com.facebook.drift.codec.internal.ProtocolWriter;
import com.facebook.drift.codec.metadata.ThriftType;
import com.facebook.drift.protocol.TProtocolReader;
import com.facebook.drift.protocol.TProtocolWriter;

import javax.annotation.concurrent.Immutable;

import java.util.List;

import static java.util.Objects.requireNonNull;

@Immutable
public class ListThriftCodec
        implements ThriftCodec>
{
    private final ThriftCodec elementCodec;
    private final ThriftType type;

    public ListThriftCodec(ThriftType type, ThriftCodec elementCodec)
    {
        this.type = requireNonNull(type, "type is null");
        this.elementCodec = requireNonNull(elementCodec, "elementCodec is null");
    }

    @Override
    public ThriftType getType()
    {
        return type;
    }

    @Override
    public List read(TProtocolReader protocol)
            throws Exception
    {
        requireNonNull(protocol, "protocol is null");
        return new ProtocolReader(protocol).readList(elementCodec);
    }

    @Override
    public void write(List value, TProtocolWriter protocol)
            throws Exception
    {
        requireNonNull(value, "value is null");
        requireNonNull(protocol, "protocol is null");
        new ProtocolWriter(protocol).writeList(elementCodec, value);
    }
}