io.github.jdocker.common.vertx.JacksonCodec.java Source code

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Here is the source code for io.github.jdocker.common.vertx.JacksonCodec.java

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/*
 * 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 io.github.jdocker.common.vertx;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.eventbus.MessageCodec;

import java.io.IOException;
import java.io.StringWriter;
import java.nio.charset.Charset;
import java.util.IllegalFormatException;

/**
 * Created by atsticks on 02.02.16.
 */
public class JacksonCodec implements MessageCodec {

    private ObjectMapper mapper = new ObjectMapper();

    @Override
    public void encodeToWire(Buffer buffer, Object o) {
        ObjectWriter writer = mapper.writer();
        StringWriter w = new StringWriter();
        try {
            writer.withRootName(o.getClass().getSimpleName()).writeValue(w, o);
            buffer.appendBytes(w.toString().getBytes());
        } catch (IOException e) {
            throw new IllegalStateException("Cannot serialize into json: " + o, e);
        }

    }

    @Override
    public Object decodeFromWire(int pos, Buffer buffer) {
        ObjectReader reader = mapper.reader();
        try {
            return reader.readValue(buffer.toString(Charset.forName("UTF-8")));
        } catch (IOException e) {
            throw new IllegalStateException("Cannot decode json", e);
        }
    }

    @Override
    public Object transform(Object o) {
        return o;
    }

    @Override
    public String name() {
        return "jackson";
    }

    @Override
    public byte systemCodecID() {
        return -1;
    }
}