org.integratedmodelling.thinklab.common.utils.StringUtils.java Source code

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Here is the source code for org.integratedmodelling.thinklab.common.utils.StringUtils.java

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/**
 * Copyright 2011 The ARIES Consortium (http://www.ariesonline.org) and
 * www.integratedmodelling.org. 
    
   This file is part of Thinklab.
    
   Thinklab is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published
   by the Free Software Foundation, either version 3 of the License,
   or (at your option) any later version.
    
   Thinklab 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
   General Public License for more details.
    
   You should have received a copy of the GNU General Public License
   along with Thinklab.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.integratedmodelling.thinklab.common.utils;

import java.util.ArrayList;
import java.util.Collection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StringUtils extends org.apache.commons.lang.StringUtils {

    /**
     * Remove all leading and trailing whitespace; pack whitespace in between to
     * single space; leave a blank line if there are at least two newlines in the
     * original whitespace. Good for formatting indented and bullshitted text like
     * what you put in XML files into something more suitable for text processing or
     * wiki translation.
     * 
     * @param s
     * @return
     */
    static public String pack(String s) {

        if (s == null)
            return "";

        StringBuffer ret = new StringBuffer(s.length());

        s = s.trim();

        for (int i = 0; i < s.length(); i++) {

            int nlines = 0;
            int wp = 0;
            while (Character.isWhitespace(s.charAt(i))) {
                if (s.charAt(i) == '\n')
                    nlines++;
                i++;
                wp++;
            }
            if (wp > 0)
                ret.append(nlines > 1 ? "\n\n" : " ");
            ret.append(s.charAt(i));
        }

        return ret.toString();
    }

    /**
     * Divide up a string into tokens, correctly handling double quotes.
     * 
     * @param s
     * @return
     */
    static public Collection<String> tokenize(String s) {

        ArrayList<String> ret = new ArrayList<String>();
        String regex = "\"([^\"]*)\"|(\\S+)";
        Matcher m = Pattern.compile(regex).matcher(s);
        while (m.find()) {
            if (m.group(1) != null) {
                ret.add(m.group(1));
            } else {
                ret.add(m.group(2));
            }
        }
        return ret;
    }
}