remoting-core/remoting-impl/src/main/java/org/apache/rocketmq/remoting/impl/protocol/serializer/JsonSerializer.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.rocketmq.remoting.impl.protocol.serializer;

import com.alibaba.fastjson.JSON;
import java.lang.reflect.Type;
import java.nio.ByteBuffer;
import org.apache.rocketmq.remoting.api.serializable.Serializer;
import org.apache.rocketmq.remoting.common.TypePresentation;
import org.apache.rocketmq.remoting.impl.command.CodecHelper;

public class JsonSerializer implements Serializer {
    public static final String SERIALIZER_NAME = JsonSerializer.class.getSimpleName();
    public static final byte SERIALIZER_TYPE = 'J';

    public JsonSerializer() {
    }

    @Override
    public String name() {
        return SERIALIZER_NAME;
    }

    @Override
    public byte type() {
        return SERIALIZER_TYPE;
    }

    @Override
    public <T> T decode(final byte[] content, final Class<T> c) {
        if (content != null) {
            try {
                final String jsonString = new String(content, CodecHelper.REMOTING_CHARSET);
                return JSON.parseObject(jsonString, c);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        return null;
    }

    @Override
    public <T> T decode(final byte[] content, final TypePresentation<T> typePresentation) {
        return decode(content, typePresentation.getType());
    }

    @Override
    public <T> T decode(byte[] content, Type type) {
        if (content != null) {
            try {
                final String jsonString = new String(content, CodecHelper.REMOTING_CHARSET);
                return JSON.parseObject(jsonString, type);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        return null;
    }

    @Override
    public ByteBuffer encode(final Object object) {
        if (object != null) {
            String jsonString = JSON.toJSONString(object);
            byte[] bytes = jsonString.getBytes(CodecHelper.REMOTING_CHARSET);
            try {
                return ByteBuffer.wrap(bytes, 0, bytes.length);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        return null;
    }
}