valueparser.java

J2ME MIDP_Example_Applications

// Copyright 2002 Nokia Corporation.
//
// THIS SOURCE CODE IS PROVIDED 'AS IS', WITH NO WARRANTIES WHATSOEVER,
// EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, FITNESS
// FOR ANY PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE
// OR TRADE PRACTICE, RELATING TO THE SOURCE CODE OR ANY WARRANTY OTHERWISE
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// SUPPORT. FURTHERMORE, NOKIA MAKES NO WARRANTY THAT EXERCISE OF THE
// RIGHTS GRANTED HEREUNDER DOES NOT INFRINGE OR MAY NOT CAUSE INFRINGEMENT
// OF ANY PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OWNED OR CONTROLLED
// BY THIRD PARTIES
//
// Furthermore, information provided in this source code is preliminary,
// and may be changed substantially prior to final release. Nokia Corporation
// retains the right to make changes to this source code at
// any time, without notice. This source code is provided for informational
// purposes only.
//
// Nokia and Nokia Connecting People are registered trademarks of Nokia
// Corporation.
// Java and all Java-based marks are trademarks or registered trademarks of
// Sun Microsystems, Inc.
// Other product and company names mentioned herein may be trademarks or
// trade names of their respective owners.
//
// A non-exclusive, non-transferable, worldwide, limited license is hereby
// granted to the Licensee to download, print, reproduce and modify the
// source code. The licensee has the right to market, sell, distribute and
// make available the source code in original or modified form only when
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package whiteboard;


class ValueParser
{
    private final String dataStr;
    private int currentIndex = 0;


    ValueParser(String str)
    {
        dataStr = str;
    }


    String getNextValue()
    {
        StringBuffer buf = new StringBuffer();
        String value = null;

        if (dataStr != null)
        {
            int dataStrLen = dataStr.length();
            while (currentIndex < dataStrLen)
            {
                char ch = dataStr.charAt(currentIndex);
                if (ch == '\\')
                {
                    currentIndex++;
                    ch = dataStr.charAt(currentIndex);
                    if ((ch == '\\') || (ch == '\n'))
                    {
                        buf.append(ch);
                    }
                    else
                    {
                        buf.append('?');
                    }
                }
                else if (ch == '\n')
                {
                    value = buf.toString();
                    currentIndex++;
                    break;
                }
                else
                {
                    buf.append(ch);
                }
                currentIndex++;
            }

            if ((value == null) && (buf.length() > 0))
            {
                // didn't find a newline before end of dataStr
                value = buf.toString();
            }
        }

        return value;
    }


    // This functionality was repeated a lot, so we moved it here
    int getNextIntValue()
        throws NumberFormatException
    {
        String str = getNextValue();
        int value = Integer.parseInt(str);
        return value;
    }
}