/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package io.mycat.util;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
/**
* @author mycat
*/
public class SplitUtil {
private static final String[] EMPTY_STRING_ARRAY = new String[0];
/**
* 解析字符串<br>
* 比如:c1='$',c2='-' 输入字符串：mysql_db$0-2<br>
* 输出array:mysql_db[0],mysql_db[1],mysql_db[2]
*/
public static String[] split2(String src, char c1, char c2) {
if (src == null) {
return null;
}
int length = src.length();
if (length == 0) {
return EMPTY_STRING_ARRAY;
}
List<String> list = new LinkedList<String>();
String[] p = split(src, c1, true);
if (p.length > 1) {
String[] scope = split(p[1], c2, true);
int min = Integer.parseInt(scope[0]);
int max = Integer.parseInt(scope[scope.length - 1]);
for (int x = min; x <= max; x++) {
list.add(new StringBuilder(p[0]).append('[').append(x).append(']').toString());
}
} else {
list.add(p[0]);
}
return list.toArray(new String[list.size()]);
}
public static String[] split(String src) {
return split(src, null, -1);
}
public static String[] split(String src, char separatorChar) {
if (src == null) {
return null;
}
int length = src.length();
if (length == 0) {
return EMPTY_STRING_ARRAY;
}
List<String> list = new LinkedList<String>();
int i = 0;
int start = 0;
boolean match = false;
while (i < length) {
if (src.charAt(i) == separatorChar) {
if (match) {
list.add(src.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
if (match) {
list.add(src.substring(start, i));
}
return list.toArray(new String[list.size()]);
}
public static String[] split(String src, char separatorChar, boolean trim) {
if (src == null) {
return null;
}
int length = src.length();
if (length == 0) {
return EMPTY_STRING_ARRAY;
}
List<String> list = new LinkedList<String>();
int i = 0;
int start = 0;
boolean match = false;
while (i < length) {
if (src.charAt(i) == separatorChar) {
if (match) {
if (trim) {
list.add(src.substring(start, i).trim());
} else {
list.add(src.substring(start, i));
}
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
if (match) {
if (trim) {
list.add(src.substring(start, i).trim());
} else {
list.add(src.substring(start, i));
}
}
return list.toArray(new String[list.size()]);
}
public static String[] split(String str, String separatorChars) {
return split(str, separatorChars, -1);
}
public static String[] split(String src, String separatorChars, int max) {
if (src == null) {
return null;
}
int length = src.length();
if (length == 0) {
return EMPTY_STRING_ARRAY;
}
List<String> list = new LinkedList<String>();
int sizePlus1 = 1;
int i = 0;
int start = 0;
boolean match = false;
if (separatorChars == null) {// null表示使用空白作为分隔符
while (i < length) {
if (Character.isWhitespace(src.charAt(i))) {
if (match) {
if (sizePlus1++ == max) {
i = length;
}
list.add(src.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
} else if (separatorChars.length() == 1) {// 优化分隔符长度为1的情形
char sep = separatorChars.charAt(0);
while (i < length) {
if (src.charAt(i) == sep) {
if (match) {
if (sizePlus1++ == max) {
i = length;
}
list.add(src.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
} else {// 一般情形
while (i < length) {
if (separatorChars.indexOf(src.charAt(i)) >= 0) {
if (match) {
if (sizePlus1++ == max) {
i = length;
}
list.add(src.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
}
if (match) {
list.add(src.substring(start, i));
}
return list.toArray(new String[list.size()]);
}
/**
* 解析字符串，比如: <br>
* 1. c1='$',c2='-',c3='[',c4=']' 输入字符串：mysql_db$0-2<br>
* 输出mysql_db[0],mysql_db[1],mysql_db[2]<br>
* 2. c1='$',c2='-',c3='#',c4='0' 输入字符串：mysql_db$0-2<br>
* 输出mysql_db#0,mysql_db#1,mysql_db#2<br>
* 3. c1='$',c2='-',c3='0',c4='0' 输入字符串：mysql_db$0-2<br>
* 输出mysql_db0,mysql_db1,mysql_db2<br>
*/
public static String[] split(String src, char c1, char c2, char c3, char c4) {
if (src == null) {
return null;
}
int length = src.length();
if (length == 0) {
return EMPTY_STRING_ARRAY;
}
List<String> list = new LinkedList<String>();
if (src.indexOf(c1) == -1) {
list.add(src.trim());
} else {
String[] s = split(src, c1, true);
String[] scope = split(s[1], c2, true);
int min = Integer.parseInt(scope[0]);
int max = Integer.parseInt(scope[scope.length - 1]);
if (c3 == '0') {
for (int x = min; x <= max; x++) {
list.add(new StringBuilder(s[0]).append(x).toString());
}
} else if (c4 == '0') {
for (int x = min; x <= max; x++) {
list.add(new StringBuilder(s[0]).append(c3).append(x).toString());
}
} else {
for (int x = min; x <= max; x++) {
list.add(new StringBuilder(s[0]).append(c3).append(x).append(c4).toString());
}
}
}
return list.toArray(new String[list.size()]);
}
public static String[] split(String src, char fi, char se, char th) {
return split(src, fi, se, th, '0', '0');
}
public static String[] split(String src, char fi, char se, char th, char left, char right) {
List<String> list = new LinkedList<String>();
String[] pools = split(src, fi, true);
for (int i = 0; i < pools.length; i++) {
if (pools[i].indexOf(se) == -1) {
list.add(pools[i]);
continue;
}
String[] s = split(pools[i], se, th, left, right);
for (int j = 0; j < s.length; j++) {
list.add(s[j]);
}
}
return list.toArray(new String[list.size()]);
}
public static String[] splitByByteSize(String string, int size) {
if (size < 2)
{
return new String[]{string};
}
byte[] bytes = string.getBytes();
if (bytes.length <= size)
return new String[] { string };
// 分成的条数不确定(整除的情况下也许会多出一条),所以先用list再转化为array
List list = new ArrayList();
int offset = 0;// 偏移量,也就是截取的字符串的首字节的位置
int length = 0;// 截取的字符串的长度,可能是size,可能是size-1
int position = 0;// 可能的截取点,根据具体情况判断是不是在此截取
while (position < bytes.length) {
position = offset + size;
if (position > bytes.length) {
// 最后一条
String s = new String(bytes, offset, bytes.length - offset);
list.add(s);
break;
}
if (bytes[position - 1] > 0
|| (bytes[position - 1] < 0 && bytes[position - 2] < 0))
// 截断点是字母,或者是汉字
length = size;
else
// 截断点在汉字中间
length = size - 1;
String s = new String(bytes, offset, length);
list.add(s);
offset += length;
}
String[] array = new String[list.size()];
for (int i = 0; i < array.length; i++)
array[i] = (String) list.get(i);
return array;
}
}