package org.solmix.commons.util;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.solmix.commons.Constants;
public final class StringUtils
{
// private static final Logger logger = LoggerFactory.getLogger(StringUtils.class);
public static final String[] EMPTY_STRING_ARRAY = new String[0];
private static final Pattern KVP_PATTERN = Pattern.compile("([_.a-zA-Z0-9][-_.a-zA-Z0-9]*)[=](.*)"); // key
// value
// pair
// pattern.
private static final Pattern INT_PATTERN = Pattern.compile("^\\d+$");
public static boolean isBlank(String str) {
if (str == null || str.length() == 0)
return true;
return false;
}
/**
* is empty string.
*
* @param str source string.
* @return is empty.
*/
public static boolean isEmpty(String str) {
if (str == null || str.length() == 0)
return true;
return false;
}
/**
* is not empty string.
*
* @param str source string.
* @return is not empty.
*/
public static boolean isNotEmpty(String str) {
return str != null && str.length() > 0;
}
/**
*
* @param s1
* @param s2
* @return equals
*/
public static boolean isEquals(String s1, String s2) {
if (s1 == null && s2 == null)
return true;
if (s1 == null || s2 == null)
return false;
return s1.equals(s2);
}
/**
* is integer string.
*
* @param str
* @return is integer
*/
public static boolean isInteger(String str) {
if (str == null || str.length() == 0)
return false;
return INT_PATTERN.matcher(str).matches();
}
public static int parseInteger(String str) {
if (!isInteger(str))
return 0;
return Integer.parseInt(str);
}
/**
* Returns true if s is a legal Java identifier.
* <p>
* <a href="http://www.exampledepot.com/egs/java.lang/IsJavaId.html">more
* info.</a>
*/
public static boolean isJavaIdentifier(String s) {
if (s.length() == 0 || !Character.isJavaIdentifierStart(s.charAt(0))) {
return false;
}
for (int i = 1; i < s.length(); i++) {
if (!Character.isJavaIdentifierPart(s.charAt(i))) {
return false;
}
}
return true;
}
public static boolean isContains(String values, String value) {
if (values == null || values.length() == 0) {
return false;
}
return isContains(Constants.COMMA_SPLIT_PATTERN.split(values), value);
}
/**
*
* @param values
* @param value
* @return contains
*/
public static boolean isContains(String[] values, String value) {
if (value != null && value.length() > 0 && values != null
&& values.length > 0) {
for (String v : values) {
if (value.equals(v)) {
return true;
}
}
}
return false;
}
public static boolean isNumeric(String str) {
if (str == null) {
return false;
}
int sz = str.length();
for (int i = 0; i < sz; i++) {
if (Character.isDigit(str.charAt(i)) == false) {
return false;
}
}
return true;
}
/**
* translat.
*
* @param src source string.
* @param from src char table.
* @param to target char table.
* @return String.
*/
public static String translat(String src, String from, String to) {
if (isEmpty(src))
return src;
StringBuilder sb = null;
int ix;
char c;
for (int i = 0, len = src.length(); i < len; i++) {
c = src.charAt(i);
ix = from.indexOf(c);
if (ix == -1) {
if (sb != null)
sb.append(c);
} else {
if (sb == null) {
sb = new StringBuilder(len);
sb.append(src, 0, i);
}
if (ix < to.length())
sb.append(to.charAt(ix));
}
}
return sb == null ? src : sb.toString();
}
/**
* split.
*
* @param ch char.
* @return string array.
*/
public static String[] split(String str, char ch) {
List<String> list = null;
char c;
int ix = 0, len = str.length();
for (int i = 0; i < len; i++) {
c = str.charAt(i);
if (c == ch) {
if (list == null)
list = new ArrayList<String>();
list.add(str.substring(ix, i));
ix = i + 1;
}
}
if (ix > 0)
list.add(str.substring(ix));
return list == null ? EMPTY_STRING_ARRAY
: (String[]) list.toArray(EMPTY_STRING_ARRAY);
}
public static final String[] split(String string, String delimiter) {
int index = string.indexOf(delimiter);
if (index == -1) {
return new String[] { string };
}
int length = delimiter.length();
ArrayList<String> split = new ArrayList<String>();
while (index != -1) {
split.add(string.substring(0, index));
string = string.substring(index + length);
index = string.indexOf(delimiter);
}
if (!string.equals("")) {
split.add(string);
}
return split.toArray(new String[split.size()]);
}
/**
* join string.
*
* @param array String array.
* @return String.
*/
public static String join(String[] array) {
if (array.length == 0)
return "";
StringBuilder sb = new StringBuilder();
for (String s : array)
sb.append(s);
return sb.toString();
}
/**
* join string like javascript.
*
* @param array String array.
* @param split split
* @return String.
*/
public static String join(String[] array, char split) {
if (array.length == 0)
return "";
StringBuilder sb = new StringBuilder();
for (int i = 0; i < array.length; i++) {
if (i > 0)
sb.append(split);
sb.append(array[i]);
}
return sb.toString();
}
/**
* join string like javascript.
*
* @param array String array.
* @param split split
* @return String.
*/
public static String join(String[] array, String split) {
if (array.length == 0)
return "";
StringBuilder sb = new StringBuilder();
for (int i = 0; i < array.length; i++) {
if (i > 0)
sb.append(split);
sb.append(array[i]);
}
return sb.toString();
}
public static String join(Collection<String> coll, String split) {
if (coll.isEmpty())
return "";
StringBuilder sb = new StringBuilder();
boolean isFirst = true;
for (String s : coll) {
if (isFirst)
isFirst = false;
else
sb.append(split);
sb.append(s);
}
return sb.toString();
}
/**
* parse key-value pair.
*
* @param str string.
* @param itemSeparator item separator.
* @return key-value map;
*/
private static Map<String, String> parseKeyValuePair(String str,
String itemSeparator) {
String[] tmp = str.split(itemSeparator);
Map<String, String> map = new HashMap<String, String>(tmp.length);
for (int i = 0; i < tmp.length; i++) {
Matcher matcher = KVP_PATTERN.matcher(tmp[i]);
if (matcher.matches() == false)
continue;
map.put(matcher.group(1), matcher.group(2));
}
return map;
}
public static String getQueryStringValue(String qs, String key) {
Map<String, String> map = StringUtils.parseQueryString(qs);
return map.get(key);
}
/**
* parse query string to Parameters.
*
* @param qs query string.
* @return Parameters instance.
*/
public static Map<String, String> parseQueryString(String qs) {
if (qs == null || qs.length() == 0)
return new HashMap<String, String>();
return parseKeyValuePair(qs, "\\&");
}
public static String getServiceKey(Map<String, String> ps) {
StringBuilder buf = new StringBuilder();
String group = ps.get(Constants.GROUP_KEY);
if (group != null && group.length() > 0) {
buf.append(group).append("/");
}
buf.append(ps.get(Constants.INTERFACE_KEY));
String version = ps.get(Constants.VERSION_KEY);
if (version != null && version.length() > 0) {
buf.append(":").append(version);
}
return buf.toString();
}
public static String toQueryString(Map<String, String> ps) {
StringBuilder buf = new StringBuilder();
if (ps != null && ps.size() > 0) {
for (Map.Entry<String, String> entry : new TreeMap<String, String>(
ps).entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
if (key != null && key.length() > 0 && value != null
&& value.length() > 0) {
if (buf.length() > 0) {
buf.append("&");
}
buf.append(key);
buf.append("=");
buf.append(value);
}
}
}
return buf.toString();
}
public static String camelToSplitName(String camelName, String split) {
if (camelName == null || camelName.length() == 0) {
return camelName;
}
StringBuilder buf = null;
for (int i = 0; i < camelName.length(); i++) {
char ch = camelName.charAt(i);
if (ch >= 'A' && ch <= 'Z') {
if (buf == null) {
buf = new StringBuilder();
if (i > 0) {
buf.append(camelName.substring(0, i));
}
}
if (i > 0) {
buf.append(split);
}
buf.append(Character.toLowerCase(ch));
} else if (buf != null) {
buf.append(ch);
}
}
return buf == null ? camelName : buf.toString();
}
public static String toString(Throwable e) {
StringWriter w = new StringWriter();
PrintWriter p = new PrintWriter(w);
p.print(e.getClass().getName());
if (e.getMessage() != null) {
p.print(": " + e.getMessage());
}
p.println();
try {
e.printStackTrace(p);
return w.toString();
} finally {
p.close();
}
}
private StringUtils()
{
}
}