mirror of https://github.com/apache/cloudstack.git
New String Util
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Alex Huang
parent
c0ccabb5a3
commit
28982486e7
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@ -23,10 +23,10 @@ import java.util.List;
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// StringUtils exists in Apache Commons Lang, but rather than import the entire JAR to our system, for now
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// just implement the method needed
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public class StringUtils {
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private static final char[] hexChar = {
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private static final char[] hexChar = {
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'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
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};
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public static String join(Iterable<? extends Object> iterable, String delim) {
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StringBuilder sb = new StringBuilder();
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if (iterable != null) {
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@ -42,90 +42,104 @@ public class StringUtils {
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}
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return sb.toString();
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}
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/**
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* @param tags
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* @return List of tags
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*/
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/**
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* @param tags
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* @return List of tags
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*/
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public static List<String> csvTagsToList(String tags) {
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List<String> tagsList = new ArrayList<String>();
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if (tags != null) {
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List<String> tagsList = new ArrayList<String>();
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if (tags != null) {
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String[] tokens = tags.split(",");
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for (int i = 0; i < tokens.length; i++) {
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tagsList.add(tokens[i].trim());
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}
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}
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return tagsList;
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return tagsList;
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}
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/**
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* Converts a List of tags to a comma separated list
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* @param tags
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* @return String containing a comma separated list of tags
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*/
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* Converts a List of tags to a comma separated list
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* @param tags
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* @return String containing a comma separated list of tags
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*/
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public static String listToCsvTags(List<String> tagsList) {
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String tags = "";
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if (tagsList.size() > 0) {
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for (int i = 0; i < tagsList.size(); i++) {
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tags += tagsList.get(i);
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if (i != tagsList.size() - 1) {
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tags += ",";
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}
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}
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}
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return tags;
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String tags = "";
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if (tagsList.size() > 0) {
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for (int i = 0; i < tagsList.size(); i++) {
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tags += tagsList.get(i);
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if (i != tagsList.size() - 1) {
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tags += ",";
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}
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}
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}
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return tags;
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}
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public static String getExceptionStackInfo(Throwable e) {
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StringBuffer sb = new StringBuffer();
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sb.append(e.toString()).append("\n");
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StackTraceElement[] elemnents = e.getStackTrace();
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for(StackTraceElement element : elemnents) {
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sb.append(element.getClassName()).append(".");
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sb.append(element.getMethodName()).append("(");
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sb.append(element.getFileName()).append(":");
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sb.append(element.getLineNumber()).append(")");
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sb.append("\n");
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}
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return sb.toString();
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StringBuffer sb = new StringBuffer();
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sb.append(e.toString()).append("\n");
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StackTraceElement[] elemnents = e.getStackTrace();
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for(StackTraceElement element : elemnents) {
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sb.append(element.getClassName()).append(".");
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sb.append(element.getMethodName()).append("(");
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sb.append(element.getFileName()).append(":");
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sb.append(element.getLineNumber()).append(")");
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sb.append("\n");
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}
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return sb.toString();
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}
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public static String unicodeEscape(String s) {
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < s.length(); i++) {
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char c = s.charAt(i);
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if ((c >> 7) > 0) {
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sb.append("\\u");
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sb.append(hexChar[(c >> 12) & 0xF]); // append the hex character for the left-most 4-bits
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sb.append(hexChar[(c >> 8) & 0xF]); // hex for the second group of 4-bits from the left
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sb.append(hexChar[(c >> 4) & 0xF]); // hex for the third group
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sb.append(hexChar[c & 0xF]); // hex for the last group, e.g., the right most 4-bits
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}
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else {
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sb.append(c);
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}
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}
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return sb.toString();
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < s.length(); i++) {
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char c = s.charAt(i);
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if ((c >> 7) > 0) {
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sb.append("\\u");
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sb.append(hexChar[(c >> 12) & 0xF]); // append the hex character for the left-most 4-bits
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sb.append(hexChar[(c >> 8) & 0xF]); // hex for the second group of 4-bits from the left
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sb.append(hexChar[(c >> 4) & 0xF]); // hex for the third group
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sb.append(hexChar[c & 0xF]); // hex for the last group, e.g., the right most 4-bits
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}
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else {
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sb.append(c);
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}
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}
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return sb.toString();
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}
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public static String getMaskedPasswordForDisplay(String password) {
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if(password == null || password.isEmpty())
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return "*";
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StringBuffer sb = new StringBuffer();
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sb.append(password.charAt(0));
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for(int i = 1; i < password.length(); i++)
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sb.append("*");
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return sb.toString();
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if(password == null || password.isEmpty())
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return "*";
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StringBuffer sb = new StringBuffer();
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sb.append(password.charAt(0));
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for(int i = 1; i < password.length(); i++)
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sb.append("*");
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return sb.toString();
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}
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public static int formatForOutput(String text, int start, int columns, char separator) {
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if (start >= text.length()) {
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return -1;
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}
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int end = start + columns;
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if (end > text.length()) {
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end = text.length();
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}
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String searchable = text.substring(start, end);
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int found = searchable.lastIndexOf(separator);
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return found > 0 ? found : end - start;
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}
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}
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