1 /* 2 * Copyright (C) 2013 DroidDriver committers 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 io.appium.droiddriver.util; 18 19 /** 20 * Static helper methods for manipulating strings. 21 */ 22 public class Strings { 23 public static String charSequenceToString(CharSequence input) { 24 return input == null ? null : input.toString(); 25 } 26 27 public static ToStringHelper toStringHelper(Object self) { 28 return new ToStringHelper(self.getClass().getSimpleName()); 29 } 30 31 public static final class ToStringHelper { 32 private final StringBuilder builder; 33 private boolean needsSeparator = false; 34 35 /** 36 * Use {@link #toStringHelper(Object)} to create an instance. 37 */ 38 private ToStringHelper(String className) { 39 this.builder = new StringBuilder(32).append(className).append('{'); 40 } 41 42 public ToStringHelper addValue(Object value) { 43 maybeAppendSeparator().append(value); 44 return this; 45 } 46 47 public ToStringHelper add(String name, Object value) { 48 maybeAppendSeparator().append(name).append('=').append(value); 49 return this; 50 } 51 52 @Override 53 public String toString() { 54 return builder.append('}').toString(); 55 } 56 57 private StringBuilder maybeAppendSeparator() { 58 if (needsSeparator) { 59 return builder.append(", "); 60 } else { 61 needsSeparator = true; 62 return builder; 63 } 64 } 65 } 66 } 67
