com.hierynomus.utils.Strings Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of smbj Show documentation

SMB2 protocol library for communication with Windows servers

There is a newer version: 0.13.0

/*
 * Copyright (C)2016 - SMBJ Contributors
 *
 * Licensed 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 com.hierynomus.utils;

import com.hierynomus.protocol.commons.Charsets;

import java.util.ArrayList;
import java.util.List;

public class Strings {

    /**
     * Split a string on a character.
     *
     * @param string The string to split.
     * @param c The character to split on.
     * @return The splitted parts of the string.
     */
    public static List split(String string, char c) {
        List parts = new ArrayList<>();
        int off = 0;
        int next;
        while ((next = string.indexOf(c, off)) != -1) {
            parts.add(string.substring(off, next));
            off = next + 1;
        }
        parts.add(string.substring(off));
        return parts;
    }

    /**
     * Join a string on a character.
     *
     * @param strings The strings to join.
     * @param c The character to join on.
     * @return The joined parts of the string.
     */
    public static String join(List strings, char c) {
        StringBuilder joiner = new StringBuilder();
        for (int i = 0; i < strings.size(); i++) {
            if (i > 0) {
                joiner.append(c);
            }
            joiner.append(strings.get(i));
        }
        return joiner.toString();
    }

    /**
     * Return a byte[] of the String including a final null terminator
     * @param s
     * @return
     */
    public static byte[] nullTerminatedBytes(String s) {
        byte[] b = new byte[s.length() + 1];
        System.arraycopy(s.getBytes(Charsets.US_ASCII), 0, b, 0, s.length());
        return b;
    }

    /**
     * Check whether the passed String is not null and not empty (after trim)
     * @param s The string to check
     * @return true iff the string is not blank
     */
    public static boolean isNotBlank(String s) {
        return s != null && !s.trim().isEmpty();
    }

}