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jpivot-wcf code used by the ART reporting tool

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/*
 * ====================================================================
 * This software is subject to the terms of the Common Public License
 * Agreement, available at the following URL:
 *   http://www.opensource.org/licenses/cpl.html .
 * Copyright (C) 2003-2004 TONBELLER AG.
 * All Rights Reserved.
 * You must accept the terms of that agreement to use this software.
 * ====================================================================
 *
 * 
 */
package net.sf.wcfart.wcf.format;

import java.util.List;

import org.apache.log4j.Logger;
import org.apache.regexp.RE;
import org.apache.regexp.RESyntaxException;

import net.sf.wcfart.wcf.utils.SoftException;


/**
 * validates string input via regular expression
 */
public class RegexHandler extends FormatHandlerSupport {
	private static Logger logger = Logger.getLogger(RegexHandler.class);
  /**
   * returns the unchanged string value of o.
   */
  public String format(Object o, String userPattern) {
    return String.valueOf(o);
  }

  /**
   * throws a FormatException if s does not match the regex
   * @throws FormatException
   */
  public Object parse(String s, String userPattern) throws FormatException {
    try {
      String regex = super.findPattern(userPattern);
      RE re = new RE(regex);
      if (!re.match(s)) {
        throw new FormatException(getErrorMessage(s));
      }
      return s;
    } catch (RESyntaxException e) {
			logger.error("exception caught", e);
      throw new SoftException(e);
    }
  }

  public boolean canHandle(Object value) {
    return false;
  }

  public Object toNativeArray(List