65 lines
2.0 KiB
Java
65 lines
2.0 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.dialer.util;
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import android.support.annotation.Nullable;
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import android.text.TextUtils;
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/** Static utility methods for Strings. */
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public class MoreStrings {
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/**
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* Returns the given string if it is non-null; the empty string otherwise.
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*
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* @param string the string to test and possibly return
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* @return {@code string} itself if it is non-null; {@code ""} if it is null
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*/
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public static String nullToEmpty(@Nullable String string) {
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return (string == null) ? "" : string;
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}
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/**
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* Returns the given string if it is nonempty; {@code null} otherwise.
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*
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* @param string the string to test and possibly return
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* @return {@code string} itself if it is nonempty; {@code null} if it is empty or null
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*/
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@Nullable
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public static String emptyToNull(@Nullable String string) {
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return TextUtils.isEmpty(string) ? null : string;
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}
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public static String toSafeString(String value) {
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if (value == null) {
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return null;
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}
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// Do exactly same thing as Uri#toSafeString() does, which will enable us to compare
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// sanitized phone numbers.
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final StringBuilder builder = new StringBuilder();
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for (int i = 0; i < value.length(); i++) {
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final char c = value.charAt(i);
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if (c == '-' || c == '@' || c == '.') {
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builder.append(c);
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} else {
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builder.append('x');
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}
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}
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return builder.toString();
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}
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}
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