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    /*
 *
 * The CIP4 Software License, Version 1.0
 *
 *
 * Copyright (c) 2001-2019 The International Cooperation for the Integration of Processes in Prepress, Press and Postpress (CIP4). All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the
 * distribution.
 *
 * 3. The end-user documentation included with the redistribution, if any, must include the following acknowledgment: "This product includes software developed by the The International Cooperation for
 * the Integration of Processes in Prepress, Press and Postpress (www.cip4.org)" Alternately, this acknowledgment may appear in the software itself, if and wherever such third-party acknowledgments
 * normally appear.
 *
 * 4. The names "CIP4" and "The International Cooperation for the Integration of Processes in Prepress, Press and Postpress" must not be used to endorse or promote products derived from this software
 * without prior written permission. For written permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "CIP4", nor may "CIP4" appear in their name, without prior written permission of the CIP4 organization
 *
 * Usage of this software in commercial products is subject to restrictions. For details please consult [email protected].
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE INTERNATIONAL COOPERATION FOR THE INTEGRATION OF PROCESSES IN PREPRESS, PRESS AND POSTPRESS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE. ====================================================================
 *
 * This software consists of voluntary contributions made by many individuals on behalf of the The International Cooperation for the Integration of Processes in Prepress, Press and Postpress and was
 * originally based on software copyright (c) 1999-2001, Heidelberger Druckmaschinen AG copyright (c) 1999-2001, Agfa-Gevaert N.V.
 *
 * For more information on The International Cooperation for the Integration of Processes in Prepress, Press and Postpress , please see .
 *
 *
 */
package org.cip4.jdflib.util;

import java.io.IOException;
import java.io.StringReader;
import java.util.Iterator;
import java.util.Vector;

import org.cip4.jdflib.cformat.ScanfFormat;
import org.cip4.jdflib.cformat.ScanfMatchException;
import org.cip4.jdflib.cformat.ScanfReader;
import org.cip4.jdflib.core.VString;

/**
 * @author prosirai
 *
 */
public class SScanf extends ScanfReader implements Iterator
{
	private static final String RARE = "__comma__@@-eher selten";
	private final VString vFmt;
	private int pos = 0;

	/**
	 * creates a scanf reader for a given string and format and returns the approriate object
	 *
	 * valid format identifiers %f - returns Double %i - returns Integer %d - returns Integer %x - returns Integer %o - returns Integer %c - returns String %s - returns String
	 *
	 * @param theString the String to scan
	 * @param format the formatting String to apply according to c++ sscanf rools
	 */
	public SScanf(final String theString, final String format)
	{
		super(new StringReader(theString));
		final String newFMT = StringUtil.replaceString(format, "%%", RARE);
		vFmt = StringUtil.tokenize(newFMT, "%", false);
		int siz = vFmt.size();
		// make sure we have exactly 1 element per "real" %
		String firstChar = "%";
		if (siz > 1 && !format.startsWith("%"))
		{
			vFmt.set(1, vFmt.get(0) + "%" + vFmt.get(1));
			vFmt.remove(0);
			siz--;
			firstChar = "";
		}
		for (int i = 0; i < siz; i++)
		{
			String fmtString = vFmt.get(i);
			fmtString = StringUtil.replaceString(fmtString, RARE, "%%");
			vFmt.set(i, firstChar + fmtString);
			firstChar = "%";
		}

	}

	/**
	 * scan a string using C++ sscanf functionality
	 *
	 * @return
	 *
	 */
	public Vector sscanf()
	{
		final Vector v = new Vector<>();
		while (hasNext())
			v.add(next());
		return v;
	}

	/**
	 *
	 * @see org.cip4.jdflib.cformat.ScanfReader#scanDouble(org.cip4.jdflib.cformat .ScanfFormat)
	 */
	@Override
	public double scanDouble(final ScanfFormat fmt) throws IOException, ScanfMatchException, IllegalArgumentException
	{
		if ("dxoi".indexOf(fmt.type) >= 0) // also gracefully handle int as
			// double
			return scanLong(fmt);
		return super.scanDouble(fmt);
	}

	/**
	 *
	 *
	 * @see org.cip4.jdflib.cformat.ScanfReader#scanString(org.cip4.jdflib.cformat .ScanfFormat)
	 */
	@Override
	public String scanString(final ScanfFormat fmt) throws IOException, IllegalArgumentException
	{
		if ("di".indexOf(fmt.type) >= 0) // also gracefully handle int as double
			return Long.toString(scanLong(fmt), 10);
		if ("o".indexOf(fmt.type) >= 0) // also gracefully handle int as double
			return Long.toString(scanLong(fmt), 8);
		if ("x".indexOf(fmt.type) >= 0) // also gracefully handle int as double
			return Long.toString(scanLong(fmt), 16);
		if ("f".indexOf(fmt.type) >= 0) // also gracefully handle int as double
			return Double.toString(scanDouble(fmt));
		if ("c".indexOf(fmt.type) >= 0) // also gracefully handle int as double
			return new String(scanChars(fmt));
		return super.scanString(fmt);
	}

	/**
	 *
	 * @see java.util.Iterator#hasNext()
	 */
	@Override
	public boolean hasNext()
	{
		return pos < vFmt.size();
	}

	/**
	 * returns the next Object (@see the constructor), null if the string has been completely parsed or an invalid format is scanned
	 */
	@Override
	public Object next()
	{
		if (!hasNext())
			return null;
		final String fmtString = vFmt.get(pos++);
		final ScanfFormat fmt = new ScanfFormat(fmtString);
		try
		{
			if ("dxoi".indexOf(fmt.type) >= 0)
				return Integer.valueOf(scanInt(fmt));
			if ("f".indexOf(fmt.type) >= 0)
				return Double.valueOf(scanDouble(fmt));
			return scanString(fmt);
		}
		catch (final IllegalArgumentException x)
		{
			pos = 999999;
			return null;
		}
		catch (final IOException x)
		{
			pos = 999999;
			return null;
		}

	}

	/**
	 * NOT IMPLEMENTED - the iterator is only forward
	 *
	 * @see java.util.Iterator#remove()
	 */
	@Override
	public void remove()
	{
		throw new IllegalArgumentException("remove not implemented!");

	}

	/**
	 * convenience static function - see the constructor for details
	 *
	 * @param theString
	 * @param format
	 * @return Vector of scanned objects - see constructor for details
	 */
	public static Vector sscanf(final String theString, final String format)
	{
		final SScanf sScanf = new SScanf(theString, format);

		final Vector v = sScanf.sscanf();
		try
		{
			sScanf.close();
		}
		catch (final IOException e)
		{
			//
		}
		return v;
	}
}
    
    
    
    

    




    
    
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