1 package com.android.mail.utils;
2 
3 import android.support.v4.text.BidiFormatter;
4 
5 /**
6  * A small utility class for working with strings.
7  */
8 public class StringUtils {
9 
10     /**
11      * Returns a string containing the tokens joined by delimiters.
12      * Additionally, each token is first passed through {@link BidiFormatter#unicodeWrap(String)}
13      * before appending to the string.
14      */
joinAndBidiFormat(String delimiter, Iterable<String> tokens)15     public static String joinAndBidiFormat(String delimiter, Iterable<String> tokens) {
16         return joinAndBidiFormat(delimiter, tokens, BidiFormatter.getInstance());
17     }
18 
19     /**
20      * Returns a string containing the tokens joined by delimiters.
21      * Additionally, each token is first passed through {@link BidiFormatter#unicodeWrap(String)}
22      * before appending to the string.
23      */
joinAndBidiFormat( String delimiter, Iterable<String> tokens, BidiFormatter bidiFormatter)24     public static String joinAndBidiFormat(
25             String delimiter, Iterable<String> tokens, BidiFormatter bidiFormatter) {
26         final StringBuilder sb = new StringBuilder();
27         boolean firstTime = true;
28         for (String token : tokens) {
29             if (firstTime) {
30                 firstTime = false;
31             } else {
32                 sb.append(delimiter);
33             }
34             sb.append(bidiFormatter.unicodeWrap(token));
35         }
36         return sb.toString();
37     }
38 }
39