Java String Quote quoteArgument(final String argument)

Description

Puts quotes around the given String if necessary.

License

Open Source License

Parameter

Parameter	Description
argument	the argument to be quoted

Exception

Parameter	Description
IllegalArgumentException	If argument contains both types of quotes

Return

the quoted argument

Declaration

public static String quoteArgument(final String argument) 

Method Source Code

//package com.java2s;
/*/*from ww  w  .  j av a  2s.  c  o  m*/
 *  Copyright (c) 2011-2015 The original author or authors
 *  ------------------------------------------------------
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  and Apache License v2.0 which accompanies this distribution.
 *
 *       The Eclipse Public License is available at
 *       http://www.eclipse.org/legal/epl-v10.html
 *
 *       The Apache License v2.0 is available at
 *       http://www.opensource.org/licenses/apache2.0.php
 *
 *  You may elect to redistribute this code under either of these licenses.
 */

public class Main {
    private static final String SINGLE_QUOTE = "\'";
    private static final String DOUBLE_QUOTE = "\"";

    /**
     * Puts quotes around the given String if necessary.
     * <p>
     * If the argument doesn't include spaces or quotes, return it as is. If it
     * contains double quotes, use single quotes - else surround the argument by
     * double quotes.
     * </p>
     *
     * @param argument the argument to be quoted
     * @return the quoted argument
     * @throws IllegalArgumentException If argument contains both types of quotes
     */
    public static String quoteArgument(final String argument) {

        String cleanedArgument = argument.trim();

        // strip the quotes from both ends
        while (cleanedArgument.startsWith(SINGLE_QUOTE) && cleanedArgument.endsWith(SINGLE_QUOTE)
                || cleanedArgument.startsWith(DOUBLE_QUOTE) && cleanedArgument.endsWith(DOUBLE_QUOTE)) {
            cleanedArgument = cleanedArgument.substring(1, cleanedArgument.length() - 1);
        }

        final StringBuilder buf = new StringBuilder();
        if (cleanedArgument.contains(DOUBLE_QUOTE)) {
            if (cleanedArgument.contains(SINGLE_QUOTE)) {
                throw new IllegalArgumentException("Can't handle single and double quotes in same argument");
            }
            return buf.append(SINGLE_QUOTE).append(cleanedArgument).append(SINGLE_QUOTE).toString();
        } else if (cleanedArgument.contains(SINGLE_QUOTE) || cleanedArgument.contains(" ")) {
            return buf.append(DOUBLE_QUOTE).append(cleanedArgument).append(DOUBLE_QUOTE).toString();
        } else {
            return cleanedArgument;
        }
    }
}

Related

1. quoteAndEscapeFilename(String filename)
2. quoteAndEscapeValue(String serviceQName)
3. quoteArg(final String arg)
4. quoteArg(String arg)
5. quoteArgForCommand(String input)
6. quoteArgument(String arg)
7. quoteAtom(String term)
8. quoteAtom(String term)
9. quoteAttrValue(String s)