org.apache.cxf.common.util.StringUtils Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cxf.common.util;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.function.Predicate;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public final class StringUtils {
private static final Predicate NOT_EMPTY = (String s) -> !s.isEmpty();
private StringUtils() {
}
public static boolean isEmpty(String str) {
if (str != null) {
int len = str.length();
for (int x = 0; x < len; ++x) {
if (str.charAt(x) > ' ') {
return false;
}
}
}
return true;
}
public static Predicate notEmpty() {
return NOT_EMPTY;
}
public static boolean isEmpty(List list) {
if (list == null || list.isEmpty()) {
return true;
}
return list.size() == 1 && isEmpty(list.get(0));
}
public static String diff(String str1, String str2) {
int index = str1.lastIndexOf(str2);
if (index > -1) {
return str1.substring(str2.length());
}
return str1;
}
public static String getFirstFound(String contents, String regex) {
if (isEmpty(regex) || isEmpty(contents)) {
return null;
}
Pattern pattern = Pattern.compile(regex, Pattern.UNICODE_CASE);
Matcher matcher = pattern.matcher(contents);
if (matcher.find()) {
if (matcher.groupCount() > 0) {
return matcher.group(1);
} else {
return matcher.group();
}
}
return null;
}
public static String addDefaultPortIfMissing(String urlString) {
return addDefaultPortIfMissing(urlString, "80");
}
public static String addDefaultPortIfMissing(String urlString, String defaultPort) {
try {
if (new URL(urlString).getPort() != -1) {
return urlString;
}
} catch (MalformedURLException e) {
return urlString;
}
String regex = "http://([^/]+)";
String found = StringUtils.getFirstFound(urlString, regex);
if (!StringUtils.isEmpty(found)) {
String replacer = "http://" + found + ':' + defaultPort;
return urlString.replaceFirst(regex, replacer);
}
return urlString;
}
/**
* Return input string with first character in upper case.
* @param name input string.
* @return capitalized form.
*/
public static String capitalize(String name) {
if (name == null || name.isEmpty()) {
return name;
}
char[] chars = name.toCharArray();
chars[0] = Character.toUpperCase(chars[0]);
return new String(chars);
}
public static String uncapitalize(String str) {
if (str == null || str.isEmpty()) {
return str;
}
return new StringBuilder(str.length())
.append(Character.toLowerCase(str.charAt(0)))
.append(str.substring(1))
.toString();
}
public static byte[] toBytesUTF8(String str) {
return toBytes(str, StandardCharsets.UTF_8.name());
}
public static byte[] toBytesASCII(String str) {
return toBytes(str, "US-ASCII");
}
public static byte[] toBytes(String str, String enc) {
try {
return str.getBytes(enc);
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException(ex);
}
}
public static String toHexString(byte[] bytes) {
StringBuilder hexString = new StringBuilder();
for (int i = 0; i < bytes.length; i++) {
hexString.append(Integer.toHexString(0xFF & bytes[i]));
}
return hexString.toString();
}
}