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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.parser.impl;

/*
    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
*/

public class ParserUtil
{
    public static final String hexToChar(String i, String j, String k, String l)
    {
         return Character.toString((char)Integer.parseInt("" + i + j + k + l, 16));
    }

    public static String render(String value, boolean pretty, String indent)
    {
        final StringBuffer lBuf = new StringBuffer();
        if(pretty) lBuf.append(indent);
        lBuf.append("\"");
        for(int i = 0; i < value.length(); i++)
        {
            final char lChar = value.charAt(i);
            if(lChar == '\n') lBuf.append("\\n");
            else if(lChar == '\r') lBuf.append("\\r");
            else if(lChar == '\t') lBuf.append("\\t");
            else if(lChar == '\b') lBuf.append("\\b");
            else if(lChar == '\f') lBuf.append("\\f");
//            else if(lChar == '/') lBuf.append("\\/");
            else if(lChar == '\"') lBuf.append("\\\"");
            else if(lChar == '\\') lBuf.append("\\\\");
            else lBuf.append(lChar);
        }

        lBuf.append("\"");
        return lBuf.toString();
    }
}