JsonCommandPacket.java

/**
 * This file is part of Waarp Project.
 * 
 * Copyright 2009, Frederic Bregier, and individual contributors by the @author tags. See the
 * COPYRIGHT.txt in the distribution for a full listing of individual contributors.
 * 
 * All Waarp Project is free software: you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 * 
 * Waarp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with Waarp . If not, see
 * <http://www.gnu.org/licenses/>.
 */
package org.waarp.openr66.protocol.localhandler.packet;

import java.io.IOException;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import org.waarp.openr66.protocol.exception.OpenR66ProtocolPacketException;
import org.waarp.openr66.protocol.localhandler.LocalChannelReference;
import org.waarp.openr66.protocol.localhandler.packet.json.JsonPacket;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;

/**
 * Json Command Message class for packet
 * 
 * 2 strings and one byte: request,result,send
 * 
 * @author frederic bregier
 */
public class JsonCommandPacket extends AbstractLocalPacket {
    private final String request;

    private String result;

    private final byte send;

    /**
     * @param headerLength
     * @param middleLength
     * @param endLength
     * @param buf
     * @return the new ValidPacket from buffer
     */
    public static JsonCommandPacket createFromBuffer(int headerLength,
            int middleLength, int endLength, ByteBuf buf) {
        final byte[] bheader = new byte[headerLength - 1];
        final byte[] bmiddle = new byte[middleLength];
        final byte bend;
        if (headerLength - 1 > 0) {
            buf.readBytes(bheader);
        }
        if (middleLength > 0) {
            buf.readBytes(bmiddle);
        }
        bend = buf.readByte();
        return new JsonCommandPacket(new String(bheader),
                new String(bmiddle), bend);
    }

    /**
     * @param srequest
     * @param sresult
     * @param end
     */
    public JsonCommandPacket(String srequest, String sresult, byte end) {
        request = srequest;
        result = sresult;
        send = end;
    }

    /**
     * @param jrequest
     * @param end
     */
    public JsonCommandPacket(JsonPacket jrequest, byte end) {
        request = jrequest.toString();
        result = null;
        send = end;
    }

    /**
     * @param jrequest
     * @param sresult
     * @param end
     */
    public JsonCommandPacket(JsonPacket jrequest, String sresult, byte end) {
        request = jrequest.toString();
        result = sresult;
        send = end;
    }

    @Override
    public void createEnd(LocalChannelReference lcr) throws OpenR66ProtocolPacketException {
        end = Unpooled.buffer(1);
        end.writeByte(send);
    }

    @Override
    public void createHeader(LocalChannelReference lcr) throws OpenR66ProtocolPacketException {
        if (request != null) {
            header = Unpooled.wrappedBuffer(request.getBytes());
        }
    }

    @Override
    public void createMiddle(LocalChannelReference lcr) throws OpenR66ProtocolPacketException {
        if (result != null) {
            middle = Unpooled.wrappedBuffer(result.getBytes());
        }
    }

    @Override
    public String toString() {
        return "JsonCommandPacket: " + request + ":" + result + ":" + send;
    }

    @Override
    public byte getType() {
        return LocalPacketFactory.JSONREQUESTPACKET;
    }

    /**
     * @return the JsonPacket from request
     */
    public JsonPacket getJsonRequest() {
        try {
            return JsonPacket.createFromBuffer(request);
        } catch (JsonParseException e) {
            return null;
        } catch (JsonMappingException e) {
            return null;
        } catch (IOException e) {
            return null;
        }
    }

    /**
     * 
     * @param result
     */
    public void setResult(String result) {
        this.result = result;
        middle = null;
    }

    /**
     * @return the request
     */
    public String getRequest() {
        return request;
    }

    /**
     * @return the result
     */
    public String getResult() {
        return result;
    }

    /**
     * @return the type
     */
    public byte getTypeValid() {
        return send;
    }

}