/*
* Copyright 1999-2012 Alibaba Group.
*
* 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.alibaba.cobar.manager.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.springframework.web.util.HtmlUtils;
/**
* (created at 2010-7-26)
*
* @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
* @author haiqing.zhuhq 2011-9-15
*/
public class CobarStringUtil {
private static final int DEFAULT_INDEX = -1;
public static String toSqlEscapedString(Object obj) {
if (obj == null) return "NULL";
String raw = obj.toString();
StringBuilder sb = new StringBuilder("\'");
for (int i = 0; i < raw.length(); ++i) {
char c = raw.charAt(i);
if ('\\' == c) {
sb.append("\\\\");
} else if ('\'' == c) {
sb.append("\\\'");
} else {
sb.append(c);
}
}
sb.append('\'');
return sb.toString();
}
public static String toSqlEscapedObject(Object obj) {
if (obj == null) return "NULL";
if (obj instanceof String) {
return toSqlEscapedString(obj);
} else {
return String.valueOf(obj);
}
}
/**
* @return negative number if there is no common start from left side, or
* any of the string is empty
*/
private static int indexOfLastEqualCharacter(String str1, String str2) {
if (StringUtils.isEmpty(str1) || StringUtils.isEmpty(str2)) return -1;
String shortOne = (str1.length() < str2.length()) ? str1 : str2;
String longOne = (str2 == shortOne) ? str1 : str2;
final int shortSize = shortOne.length();
for (int i = 0; i < shortSize; ++i) {
char cs = shortOne.charAt(i);
char cl = longOne.charAt(i);
if (cs != cl) return i - 1;
}
return shortOne.length() - 1;
}
public static String mergeListedStringWithJoin(String[] input, String sep) {
List<String> rst = mergeListedString(input);
return StringUtils.join(rst, ",");
}
/**
* e.g. {"mysql_1","mysql_2","mysql_3","mysql_5"} will return
* {"mysql_$1-3","mysql_5"}<br/>
* only merge last number
*/
public static List<String> mergeListedString(String[] input) {
if (input == null || input.length < 1) return Collections.emptyList();
if (input.length == 1) {
List<String> rst = new ArrayList<String>(1);
rst.add(input[0]);
return rst;
}
List<String> list = new ArrayList<String>(input.length);
for (String str : input)
list.add(str);
Collections.sort(list, new Comparator<String>() {
@Override
public int compare(String o1, String o2) {
if (StringUtils.equals(o1, o2)) return 0;
if (o1.length() == o2.length()) return o1.compareTo(o2);
return o1.length() < o2.length() ? -1 : 1;
}
});
List<String> rst = new ArrayList<String>();
String prefix = null;
Integer from = null;
Integer to = null;
String last = list.get(0);
for (int i = 1; i < list.size(); ++i) {
String cur = list.get(i);
if (StringUtils.equals(last, cur)) continue;
int commonInd = indexOfLastEqualCharacter(last, cur);
boolean isCon = false;
if (commonInd >= 0) {
String suffixLast = last.substring(1 + commonInd);
String suffixCur = cur.substring(1 + commonInd);
try {
int il = Integer.parseInt(suffixLast);
int ic = Integer.parseInt(suffixCur);
if (ic - il == 1) isCon = true;
} catch (Exception e) {
}
}
if (isCon) {
if (prefix == null) prefix = last.substring(0, commonInd + 1);
if (from == null) from = Integer.parseInt(last.substring(commonInd + 1));
to = Integer.parseInt(cur.substring(commonInd + 1));
} else if (prefix != null) {
rst.add(new StringBuilder(prefix).append('$').append(from).append('-').append(to).toString());
prefix = null;
from = to = null;
} else {
rst.add(last);
}
last = cur;
}
if (prefix != null) {
rst.add(new StringBuilder(prefix).append('$').append(from).append('-').append(to).toString());
prefix = null;
from = to = null;
} else {
rst.add(last);
}
return rst;
}
public static String htmlEscapedString(String str) {
if (null != str) {
return HtmlUtils.htmlEscape(str);
}
return null;
}
/**
* <pre>
* ???????????????��?? ??src = "offer_group[4]", l='[', r=']'???
* ?????Piar<String,Integer>("offer", 4);
* ??src = "offer_group", l='[', r=']'???
* ????Pair<String, Integer>("offer",-1);
* </pre>
*/
public static final Pair<String, Integer> splitIndex(String src, char l, char r) {
if (src == null) return null;
int length = src.length();
if (length == 0) return new Pair<String, Integer>("", DEFAULT_INDEX);
if (src.charAt(length - 1) != r) return new Pair<String, Integer>(src, DEFAULT_INDEX);
int offset = src.lastIndexOf(l);
if (offset == -1) return new Pair<String, Integer>(src, DEFAULT_INDEX);
int index = DEFAULT_INDEX;
try {
index = Integer.parseInt(src.substring(offset + 1, length - 1));
} catch (NumberFormatException e) {
return new Pair<String, Integer>(src, DEFAULT_INDEX);
}
return new Pair<String, Integer>(src.substring(0, offset), index);
}
}