| /* |
| * Copyright (C) 2013 DroidDriver committers |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.android.droiddriver.util; |
| |
| /** |
| * Static helper methods for manipulating strings. |
| */ |
| public class Strings { |
| public static String charSequenceToString(CharSequence input) { |
| return input == null ? null : input.toString(); |
| } |
| |
| public static ToStringHelper toStringHelper(Object self) { |
| return new ToStringHelper(self.getClass().getSimpleName()); |
| } |
| |
| public static final class ToStringHelper { |
| private final StringBuilder builder; |
| private boolean needsSeparator = false; |
| |
| /** |
| * Use {@link #toStringHelper(Object)} to create an instance. |
| */ |
| private ToStringHelper(String className) { |
| this.builder = new StringBuilder(32).append(className).append('{'); |
| } |
| |
| public ToStringHelper addValue(Object value) { |
| maybeAppendSeparator().append(value); |
| return this; |
| } |
| |
| public ToStringHelper add(String name, Object value) { |
| maybeAppendSeparator().append(name).append('=').append(value); |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return builder.append('}').toString(); |
| } |
| |
| private StringBuilder maybeAppendSeparator() { |
| if (needsSeparator) { |
| return builder.append(", "); |
| } else { |
| needsSeparator = true; |
| return builder; |
| } |
| } |
| } |
| } |