/*
*
* Copyright (c) 2013 - 2017 Lijun Liao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
*
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the XiPKI software without
* disclosing the source code of your own applications.
*
* For more information, please contact Lijun Liao at this
* address: lijun.liao@gmail.com
*/
package org.xipki.commons.common.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;
/**
* @author Lijun Liao
* @since 2.0.0
*/
public class StringUtil {
private StringUtil() {
}
public static List<String> split(final String str, final String delim) {
if (str == null) {
return null;
}
if (str.isEmpty()) {
return Collections.emptyList();
}
StringTokenizer st = new StringTokenizer(str, delim);
List<String> ret = new ArrayList<String>(st.countTokens());
while (st.hasMoreTokens()) {
ret.add(st.nextToken());
}
return ret;
}
public static boolean isBlank(final String str) {
return str == null || str.isEmpty();
}
public static boolean isNotBlank(final String str) {
return str != null && !str.isEmpty();
}
public static Set<String> splitAsSet(final String str, final String delim) {
if (str == null) {
return null;
}
if (str.isEmpty()) {
return Collections.emptySet();
}
StringTokenizer st = new StringTokenizer(str, delim);
Set<String> ret = new HashSet<String>(st.countTokens());
while (st.hasMoreTokens()) {
ret.add(st.nextToken());
}
return ret;
}
public static String collectionAsString(final Collection<String> set, final String delim) {
if (set == null) {
return null;
}
StringBuilder sb = new StringBuilder();
for (String m : set) {
sb.append(m).append(delim);
}
int len = sb.length();
if (len > 0) {
sb.delete(len - delim.length(), len);
}
return sb.toString();
}
public static boolean startsWithIgnoreCase(final String str, final String prefix) {
if (str.length() < prefix.length()) {
return false;
}
return prefix.equalsIgnoreCase(str.substring(0, prefix.length()));
}
public static boolean isNumber(final String str) {
return isNumber(str, 10);
}
public static boolean isNumber(final String str, final int radix) {
ParamUtil.requireNonNull("str", str);
try {
Integer.parseInt(str, radix);
return true;
} catch (NumberFormatException ex) {
return false;
}
}
public static String formatText(final String text, final int minLen) {
ParamUtil.requireNonNull("text", text);
int len = text.length();
if (len >= minLen) {
return text;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < minLen - len; i++) {
sb.append(" ");
}
sb.append(text);
return sb.toString();
}
public static String formatAccount(final long account, final boolean withPrefix) {
int minLen = withPrefix ? 12 : 0;
return formatAccount(account, minLen);
}
public static String formatAccount(final long account, final int minLen) {
String accountS = Long.toString(account);
final int n = accountS.length();
if (n > 3) {
StringBuilder sb = new StringBuilder(n + 3);
int firstBlockLen = n % 3;
if (firstBlockLen != 0) {
sb.append(accountS.substring(0, firstBlockLen));
sb.append(',');
}
for (int i = 0;; i++) {
int offset = firstBlockLen + i * 3;
if (offset >= n) {
break;
}
sb.append(accountS.substring(offset, offset + 3));
if (offset + 3 < n) {
sb.append(',');
}
}
accountS = sb.toString();
}
return formatText(accountS, minLen);
}
public static String formatTime(final long seconds, final boolean withPrefix) {
int minLen = withPrefix ? 12 : 0;
return formatTime(seconds, minLen);
}
private static String formatTime(final long seconds, final int minLen) {
long minutes = seconds / 60;
StringBuilder sb = new StringBuilder();
long hour = minutes / 60;
// hours
if (hour > 0) {
sb.append(hour).append(':');
}
long modMinute = minutes % 60;
// minutes
if (modMinute < 10) {
sb.append('0');
}
sb.append(modMinute).append(':');
long modSec = seconds % 60;
// seconds
if (modSec < 10) {
sb.append('0');
}
sb.append(modSec);
return formatText(sb.toString(), minLen);
}
public static char[] merge(char[][] parts) {
int sum = 0;
for (int i = 0; i < parts.length; i++) {
sum += parts[i].length;
}
char[] ret = new char[sum];
int destPos = 0;
for (int i = 0; i < parts.length; i++) {
char[] part = parts[i];
System.arraycopy(part, 0, ret, destPos, part.length);
destPos += part.length;
}
return ret;
}
}