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Java JSON Tools core library. It is independent of third party libraries. It is meant to minimize transitive dependencies. Applications of the JSON tools which relate to other libraries will be in separate optional pacakges.
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package com.sdicons.json.serializer.marshall;

/*
    JSONTools - Java JSON Tools
    Copyright (C) 2006 S.D.I.-Consulting BVBA
    http://www.sdi-consulting.com
    mailto://[email protected]

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

import com.sdicons.json.serializer.marshall.MarshallException;
import com.sdicons.json.serializer.marshall.MarshallValue;

public class MarshallValueImpl
implements MarshallValue
{

    private boolean resultBoolean;
    private byte resultByte;
    private short resultShort;
    private char resultChar;
    private int resultInt;
    private long resultLong;
    private float resultFloat;
    private double resultDouble;
    private Object resultReference;

    private int resultType;

    private MarshallValueImpl()
    {
        resultBoolean = false;
        resultByte = 0;
        resultShort = 0;
        resultChar = ' ';
        resultInt = 0;
        resultLong = 0;
        resultFloat = 0;
        resultDouble = 0.0;
        resultReference = null;
    }

    public MarshallValueImpl(boolean aBool)
    {
        this();
        resultType = BOOLEAN;
        resultBoolean = aBool;
    }

    public MarshallValueImpl(byte aByte)
    {
        this();
        resultType = BYTE;
        resultByte = aByte;
    }

    public MarshallValueImpl(char aChar)
    {
        this();
        resultType = CHAR;
        resultChar = aChar;
    }

    public MarshallValueImpl(double aDouble)
    {
        this();
        resultType = DOUBLE;
        resultDouble = aDouble;
    }

    public MarshallValueImpl(float aFloat)
    {
        this();
        resultType = FLOAT;
        resultFloat = aFloat;
    }

    public MarshallValueImpl(int aInt)
    {
        this();
        resultType = INT;
        resultInt = aInt;
    }

    public MarshallValueImpl(long aLong)
    {
        this();
        resultType = LONG;
        resultLong = aLong;
    }

    public MarshallValueImpl(short aShort)
    {
        this();
        resultType = SHORT;
        resultShort = aShort;
    }

    public MarshallValueImpl(Object aReference)
    {
        this();
        resultType = REFERENCE;
        resultReference = aReference;
    }

    public int getType()
    {
        return resultType;
    }

    public boolean getBoolean()
    throws MarshallException
    {
        if(resultType == BOOLEAN)
        {
            return resultBoolean;
        }
        else
        {
            final String lMsg = "No boolean result available.";
            throw new MarshallException(lMsg);
        }
    }

    public byte getByte()
    throws MarshallException
    {
        if(resultType == BYTE)
        {
            return resultByte;
        }
        else
        {
            final String lMsg = "No byte result available.";
            throw new MarshallException(lMsg);
        }
    }

    public short getShort()
    throws MarshallException
    {
        if(resultType == SHORT)
        {
            return resultShort;
        }
        else
        {
            final String lMsg = "No short result available.";
            throw new MarshallException(lMsg);
        }
    }

    public char getChar()
    throws MarshallException
    {
        if(resultType == CHAR)
        {
            return resultChar;
        }
        else
        {
            final String lMsg = "No char result available.";
            throw new MarshallException(lMsg);
        }
    }

    public int getInt()
    throws MarshallException
    {
        if(resultType == INT)
        {
            return resultInt;
        }
        else
        {
            String lMsg = "No int result available.";
            throw new MarshallException(lMsg);
        }
    }

    public long getLong()
    throws MarshallException
    {
        if(resultType == LONG)
        {
            return resultLong;
        }
        else
        {
            final String lMsg = "No long result available.";
            throw new MarshallException(lMsg);
        }
    }

    public float getFloat()
    throws MarshallException
    {
        if(resultType == FLOAT)
        {
            return resultFloat;
        }
        else
        {
            final String lMsg = "No float result available.";
            throw new MarshallException(lMsg);
        }
    }

    public double getDouble()
    throws MarshallException
    {
        if(resultType == DOUBLE)
        {
            return resultDouble;
        }
        else
        {
            final String lMsg = "No double result available.";
            throw new MarshallException(lMsg);
        }
    }

    public Object getReference()
    throws MarshallException
    {
        if(resultType == REFERENCE)
        {
            return resultReference;
        }
        else
        {
            final String lMsg = "No reference result available.";
            throw new MarshallException(lMsg);
        }
    }
}