Java Collection to String commaSeparatedString(List list, boolean quoteStrings)

Description

Creates a comma-separated String from the given List of String objects.

License

Open Source License

Declaration

public static String commaSeparatedString(List list,
        boolean quoteStrings) 

Method Source Code

//package com.java2s;
/*//from w w w. ja  v  a  2s . c  om
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2012 Eric Lafortune (eric@graphics.cornell.edu)
 *
 * This program 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 2 of the License, or (at your option)
 * any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

import java.util.*;

public class Main {
    /**
     * Creates a comma-separated String from the given List of String objects.
     */
    public static String commaSeparatedString(List list,
            boolean quoteStrings) {
        if (list == null) {
            return null;
        }

        StringBuffer buffer = new StringBuffer();

        for (int index = 0; index < list.size(); index++) {
            if (index > 0) {
                buffer.append(',');
            }

            String string = (String) list.get(index);

            if (quoteStrings) {
                string = quotedString(string);
            }

            buffer.append(string);
        }

        return buffer.toString();
    }

    /**
     * Returns a quoted version of the given string, if necessary.
     */
    private static String quotedString(String string) {
        return string.length() == 0 || string.indexOf(' ') >= 0
                || string.indexOf('@') >= 0 || string.indexOf('{') >= 0
                || string.indexOf('}') >= 0 || string.indexOf('(') >= 0
                || string.indexOf(')') >= 0 || string.indexOf(':') >= 0
                || string.indexOf(';') >= 0 || string.indexOf(',') >= 0 ? ("'"
                + string + "'")
                : (string);
    }
}

Related

1. collectionToStringArray(List values)
2. collectionToStringList(Collection c)
3. collectionToStringList(Collection c)
4. collectionToStringList(Collection list, String delimiter)
5. commaSeparatedList(Collection objects)
6. convertCollectionToCommaDelimitedString(Collection collection)
7. convertCollectionToString( Collection strings, String separator)
8. convertCollectionToString(Collection coll, String delimiter)
9. convertEnumsToString(Collection> enums)