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