/*
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* Copyright 2011 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.utils;
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import java.io.UnsupportedEncodingException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.List;
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public class StringUtils {
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public static boolean isEmpty(String value) {
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return value == null || value.trim().length() == 0;
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}
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public static String breakLinesForHtml(String string) {
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return string.replace("\r\n", "<br/>").replace("\r", "<br/>").replace("\n", "<br/>");
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}
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public static String escapeForHtml(String inStr, boolean changeSpace) {
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StringBuffer retStr = new StringBuffer();
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int i = 0;
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while (i < inStr.length()) {
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if (inStr.charAt(i) == '&') {
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retStr.append("&");
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} else if (inStr.charAt(i) == '<') {
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retStr.append("<");
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} else if (inStr.charAt(i) == '>') {
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retStr.append(">");
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} else if (inStr.charAt(i) == '\"') {
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retStr.append(""");
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} else if (changeSpace && inStr.charAt(i) == ' ') {
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retStr.append(" ");
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} else if (changeSpace && inStr.charAt(i) == '\t') {
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retStr.append(" ");
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} else {
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retStr.append(inStr.charAt(i));
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}
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i++;
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}
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return retStr.toString();
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}
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public static String flattenStrings(List<String> values) {
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return flattenStrings(values, " ");
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}
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public static String flattenStrings(List<String> values, String separator) {
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StringBuilder sb = new StringBuilder();
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for (String value : values) {
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sb.append(value).append(separator);
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}
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return sb.toString().trim();
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}
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public static String trimString(String value, int max) {
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if (value.length() <= max) {
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return value;
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}
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return value.substring(0, max - 3) + "...";
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}
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public static String trimShortLog(String string) {
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return trimString(string, 60);
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}
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public static String leftPad(String input, int length, char pad) {
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if (input.length() < length) {
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StringBuilder sb = new StringBuilder();
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for (int i = 0, len = length - input.length(); i < len; i++) {
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sb.append(pad);
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}
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sb.append(input);
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return sb.toString();
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}
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return input;
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}
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public static String rightPad(String input, int length, char pad) {
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if (input.length() < length) {
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StringBuilder sb = new StringBuilder();
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sb.append(input);
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for (int i = 0, len = length - input.length(); i < len; i++) {
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sb.append(pad);
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}
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return sb.toString();
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}
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return input;
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}
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public static String getSHA1(String text) {
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try {
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byte[] bytes = text.getBytes("iso-8859-1");
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return getSHA1(bytes);
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} catch (UnsupportedEncodingException u) {
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throw new RuntimeException(u);
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}
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}
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public static String getSHA1(byte[] bytes) {
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try {
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MessageDigest md = MessageDigest.getInstance("SHA-1");
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md.update(bytes, 0, bytes.length);
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byte[] sha1hash = md.digest();
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StringBuilder sb = new StringBuilder(sha1hash.length * 2);
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for (int i = 0; i < sha1hash.length; i++) {
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if (((int) sha1hash[i] & 0xff) < 0x10) {
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sb.append('0');
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}
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sb.append(Long.toString((int) sha1hash[i] & 0xff, 16));
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}
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return sb.toString();
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} catch (NoSuchAlgorithmException t) {
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throw new RuntimeException(t);
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}
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}
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public static String getRootPath(String path) {
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if (path.indexOf('/') > -1) {
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return path.substring(0, path.indexOf('/'));
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}
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return "";
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}
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}
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