| /* |
| * Copyright (C) 2016 The Dagger Authors. |
| * |
| * 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 dagger.internal.codegen.base; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** A collector for names to be used in the same namespace that should not conflict. */ |
| public final class UniqueNameSet { |
| private final Set<String> uniqueNames = new HashSet<>(); |
| |
| /** |
| * Generates a unique name using {@code base}. If {@code base} has not yet been added, it will be |
| * returned as-is. If your {@code base} is healthy, this will always return {@code base}. |
| */ |
| public String getUniqueName(CharSequence base) { |
| String name = base.toString(); |
| for (int differentiator = 2; !uniqueNames.add(name); differentiator++) { |
| name = base.toString() + differentiator; |
| } |
| return name; |
| } |
| |
| /** |
| * Adds {@code name} without any modification to the name set. Has no effect if {@code name} is |
| * already present in the set. |
| */ |
| public void claim(CharSequence name) { |
| uniqueNames.add(name.toString()); |
| } |
| } |