StringUtils.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2006-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) 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.
 *
 * OpenNMS(R) 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 OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
 *     http://www.opennms.org/
 *     http://www.opennms.com/
 *******************************************************************************/

package org.opennms.core.utils;

import java.io.File;
import java.util.ArrayList;
import java.util.StringTokenizer;

import javax.swing.filechooser.FileSystemView;

/**
 * <p>StringUtils class.</p>
 *
 * @author ranger
 * @version $Id: $
 */
public abstract class StringUtils {

    /**
     * Convenience method for creating arrays of strings suitable for use as
     * command-line parameters when executing an external process.
     *
     * <p>
     * The default {@link Runtime#exec Runtime.exec}method will split a single
     * string based on spaces, but it does not respect spaces within quotation
     * marks, and it will leave the quotation marks in the resulting substrings.
     * This method solves those problems by replacing all in-quote spaces with
     * the given delimiter, removes the quotes, and then splits the resulting
     * string by the remaining out-of-quote spaces. It then goes through each
     * substring and replaces the delimiters with spaces.
     * </p>
     *
     * <p>
     * <em>Caveat:</em> This method does not respect escaped quotes! It will
     * simply remove them and leave the stray escape characters.
     * </p>
     *
     * @param s
     *            the string to split
     * @param delim
     *            a char that does not already exist in <code>s</code>
     * @return An array of strings split by spaces outside of quotes.
     * @throws java.lang.IllegalArgumentException
     *             If <code>s</code> is null or if <code>delim</code>
     *             already exists in <code>s</code>.
     */
    public static String[] createCommandArray(String s, char delim) {
        if (s == null) {
            throw new IllegalArgumentException("Cannot take null parameters.");
        }
    
        if (s.indexOf(delim) != -1) {
            throw new IllegalArgumentException("String parameter cannot already contain delimiter character: " + delim);
        }
    
        char[] chars = s.toCharArray();
        boolean inquote = false;
        StringBuffer buffer = new StringBuffer();
    
        // append each char to a StringBuffer, but
        // leave out quote chars and replace spaces
        // inside quotes with the delim char
        for (int i = 0; i < chars.length; i++) {
            if (chars[i] == '"') {
                inquote = (inquote) ? false : true;
            } else if (inquote && chars[i] == ' ') {
                buffer.append(delim);
            } else {
                buffer.append(chars[i]);
            }
        }
    
        s = buffer.toString();
    
        // split the new string by the whitespaces that were not in quotes
        ArrayList<String> arrayList = new ArrayList<String>();
        StringTokenizer tokenizer = new StringTokenizer(s);
    
        while (tokenizer.hasMoreTokens()) {
            arrayList.add(tokenizer.nextElement().toString());
        }
    
        // put the strings in the arraylist into a string[]
        String[] list = arrayList.toArray(new String[arrayList.size()]);
    
        // change all the delim characters back to spaces
        for (int i = 0; i < list.length; i++) {
            list[i] = list[i].replace(delim, ' ');
        }
    
        return list;
    }

    /**
     * <p>truncate</p>
     *
     * @param name a {@link java.lang.String} object.
     * @param length a int.
     * @return a {@link java.lang.String} object.
     */
    public static String truncate(String name, int length) {
        if (name.length() <= length) return name;
        return name.substring(0, length);
    }

    public static boolean isLocalWindowsPath(final String path) {
    	if (File.separatorChar != '\\') return false;
    	if (path.length() < 3) return false;

    	final char colon = path.charAt(1);
    	final char slash = path.charAt(2);
    	
    	if (colon != ':') return false;
    	if (slash != '\\' && slash != '/') return false;

    	final File file = new File(path.substring(0, 3));
    	System.err.println("file = " + file);
		if (FileSystemView.getFileSystemView().isFileSystemRoot(file)) return true;

    	return false;
    }
}