com.github.sviperll.Strings Maven / Gradle / Ivy

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/*
 * Copyright (c) 2013, Victor Nazarov 
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Victor Nazarov nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL  BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.github.sviperll;

public class Strings {
    /**
     * Same as escape, but encloses string in double-quotes.
     * Ex. "abc\ndef" is converted into "\"abc\\ndef\""
     */
    public static String quote(String s) {
        StringBuilder sb = new StringBuilder();
        sb.append('"');
        sb.append(escape(s));
        sb.append('"');
        return sb.toString();
    }
    /**
     * Escapes special characters in string.
     * Ex. "abc\ndef" is converted into "abc\\ndef"
     */
    public static String escape(String s) {
        StringBuilder sb = new StringBuilder();
        for (char c: s.toCharArray()) {
            if (c == '"')
                sb.append("\\\"");
            else if (c == '\n')
                sb.append("\\\n");
            else if (c == '\r')
                sb.append("\\\r");
            else
                sb.append(c);
        }
        return sb.toString();
    }

    public static String join(String[] strings, String separator) {
        StringBuilder sb = new StringBuilder();
        sb.append(strings[0]);
        for (int i = 1; i < strings.length; i++) {
            sb.append(separator);
            sb.append(strings[i]);
        }
        return sb.toString();
    }

    public static String join(String[] strings) {
        StringBuilder sb = new StringBuilder();
        for (String s: strings) {
            sb.append(s);
        }
        return sb.toString();
    }

    private Strings() {
    }
}