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 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
