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Parser of RSQL / FIQL (query language for RESTful APIs) written in JavaCC.

There is a newer version: 2.1.0

/*
 * The MIT License
 *
 * Copyright 2013-2014 Czech Technical University in Prague.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package cz.jirutka.rsql.parser.ast;

import java.util.List;

abstract class StringUtils {

    public static String join(List list, String glue) {

        StringBuilder line = new StringBuilder();
        for (Object s : list) {
            line.append(s).append(glue);
        }
        return list.size() == 0 ? "" : line.substring(0, line.length() - glue.length());
    }

    public static boolean isBlank(String str) {
        return str == null || str.trim().isEmpty();
    }

    public static boolean isNotBlank(String str) {
        return ! isBlank(str);
    }
}