1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.dialer.util;
18 
19 /**
20  * Static utility methods for Strings.
21  */
22 public class MoreStrings {
23 
toSafeString(String value)24     public static String toSafeString(String value) {
25         if (value == null) {
26             return null;
27         }
28 
29         // Do exactly same thing as Uri#toSafeString() does, which will enable us to compare
30         // sanitized phone numbers.
31         final StringBuilder builder = new StringBuilder();
32         for (int i = 0; i < value.length(); i++) {
33             final char c = value.charAt(i);
34             if (c == '-' || c == '@' || c == '.') {
35                 builder.append(c);
36             } else {
37                 builder.append('x');
38             }
39         }
40         return builder.toString();
41     }
42 
43 }
44