org.apache.commons.cli.Util.java Source code

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Here is the source code for org.apache.commons.cli.Util.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.cli;

/**
 * Contains useful helper methods for classes within this package.
 *
 * @author John Keyes (john at integralsource.com)
 * @version $Revision: 680644 $, $Date: 2008-07-29 01:13:48 -0700 (Tue, 29 Jul 2008) $
 */
class Util {
    /**
     * Remove the hyphens from the begining of <code>str</code> and
     * return the new String.
     *
     * @param str The string from which the hyphens should be removed.
     *
     * @return the new String.
     */
    static String stripLeadingHyphens(String str) {
        if (str == null) {
            return null;
        }
        if (str.startsWith("--")) {
            return str.substring(2, str.length());
        } else if (str.startsWith("-")) {
            return str.substring(1, str.length());
        }

        return str;
    }

    /**
     * Remove the leading and trailing quotes from <code>str</code>.
     * E.g. if str is '"one two"', then 'one two' is returned.
     *
     * @param str The string from which the leading and trailing quotes
     * should be removed.
     *
     * @return The string without the leading and trailing quotes.
     */
    static String stripLeadingAndTrailingQuotes(String str) {
        if (str.startsWith("\"")) {
            str = str.substring(1, str.length());
        }
        if (str.endsWith("\"")) {
            str = str.substring(0, str.length() - 1);
        }
        return str;
    }
}