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/*
* Copyright 2011 gitblit.com.
*
* 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.gitblit.utils;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.List;
public class StringUtils {
public static boolean isEmpty(String value) {
return value == null || value.trim().length() == 0;
}
public static String breakLinesForHtml(String string) {
return string.replace("\r\n", "<br/>").replace("\r", "<br/>").replace("\n", "<br/>");
}
public static String escapeForHtml(String inStr, boolean changeSpace) {
StringBuffer retStr = new StringBuffer();
int i = 0;
while (i < inStr.length()) {
if (inStr.charAt(i) == '&') {
retStr.append("&");
} else if (inStr.charAt(i) == '<') {
retStr.append("<");
} else if (inStr.charAt(i) == '>') {
retStr.append(">");
} else if (inStr.charAt(i) == '\"') {
retStr.append(""");
} else if (changeSpace && inStr.charAt(i) == ' ') {
retStr.append(" ");
} else if (changeSpace && inStr.charAt(i) == '\t') {
retStr.append(" ");
} else {
retStr.append(inStr.charAt(i));
}
i++;
}
return retStr.toString();
}
public static String flattenStrings(List<String> values) {
return flattenStrings(values, " ");
}
public static String flattenStrings(List<String> values, String separator) {
StringBuilder sb = new StringBuilder();
for (String value : values) {
sb.append(value).append(separator);
}
return sb.toString().trim();
}
public static String trimString(String value, int max) {
if (value.length() <= max) {
return value;
}
return value.substring(0, max - 3) + "...";
}
public static String trimShortLog(String string) {
return trimString(string, 60);
}
public static String leftPad(String input, int length, char pad) {
if (input.length() < length) {
StringBuilder sb = new StringBuilder();
for (int i = 0, len = length - input.length(); i < len; i++) {
sb.append(pad);
}
sb.append(input);
return sb.toString();
}
return input;
}
public static String rightPad(String input, int length, char pad) {
if (input.length() < length) {
StringBuilder sb = new StringBuilder();
sb.append(input);
for (int i = 0, len = length - input.length(); i < len; i++) {
sb.append(pad);
}
return sb.toString();
}
return input;
}
public static String getSHA1(String text) {
try {
byte[] bytes = text.getBytes("iso-8859-1");
return getSHA1(bytes);
} catch (UnsupportedEncodingException u) {
throw new RuntimeException(u);
}
}
public static String getSHA1(byte[] bytes) {
try {
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(bytes, 0, bytes.length);
byte[] sha1hash = md.digest();
StringBuilder sb = new StringBuilder(sha1hash.length * 2);
for (int i = 0; i < sha1hash.length; i++) {
if (((int) sha1hash[i] & 0xff) < 0x10) {
sb.append('0');
}
sb.append(Long.toString((int) sha1hash[i] & 0xff, 16));
}
return sb.toString();
} catch (NoSuchAlgorithmException t) {
throw new RuntimeException(t);
}
}
public static String getRootPath(String path) {
if (path.indexOf('/') > -1) {
return path.substring(0, path.lastIndexOf('/'));
}
return "";
}
public static String getRelativePath(String basePath, String fullPath) {
String relativePath = fullPath.substring(basePath.length()).replace('\\', '/');
if (relativePath.charAt(0) == '/') {
relativePath = relativePath.substring(1);
}
return relativePath;
}
}
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