org.chtijbug.drools.platform.entity.coder.JSONCoder.java Source code

Introduction

Here is the source code for org.chtijbug.drools.platform.entity.coder.JSONCoder.java

Source

/*
 * Copyright 2014 Pymma Software
 *
 * 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 org.chtijbug.drools.platform.entity.coder;

import com.fasterxml.jackson.databind.ObjectMapper;

import javax.websocket.*;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

public abstract class JSONCoder<T> implements Encoder.TextStream<T>, Decoder.TextStream<T> {

    private Class<T> _type;

    // When configured my read in that ObjectMapper is not thread safe  
    //  
    private ThreadLocal<ObjectMapper> _mapper = new ThreadLocal<ObjectMapper>() {

        @Override
        protected ObjectMapper initialValue() {
            return new ObjectMapper();
        }
    };

    @Override
    public void init(EndpointConfig endpointConfig) {

        ParameterizedType $thisClass = (ParameterizedType) this.getClass().getGenericSuperclass();
        Type $T = $thisClass.getActualTypeArguments()[0];
        if ($T instanceof Class) {
            _type = (Class<T>) $T;
        } else if ($T instanceof ParameterizedType) {
            _type = (Class<T>) ((ParameterizedType) $T).getRawType();
        }
    }

    @Override
    public void encode(T object, Writer writer) throws EncodeException, IOException {
        _mapper.get().writeValue(writer, object);
    }

    @Override
    public T decode(Reader reader) throws DecodeException, IOException {
        return _mapper.get().readValue(reader, _type);
    }

    @Override
    public void destroy() {

    }

    protected void set_type(Class<T> _type) {
        this._type = _type;
    }

}