39 lines
1.5 KiB
Java
39 lines
1.5 KiB
Java
// Copyright 2014 The Bazel Authors. All rights reserved.
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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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package com.google.devtools.common.options;
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import javax.annotation.Nullable;
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/**
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* A read-only interface for options parser results, which only allows to query the options of
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* a specific class, but not e.g. the residue any other information pertaining to the command line.
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*/
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public interface OptionsClassProvider {
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public static final OptionsClassProvider EMPTY = new OptionsClassProvider() {
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@Override @Nullable
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public <O extends OptionsBase> O getOptions(Class<O> optionsClass) {
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return null;
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}
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};
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/**
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* Returns the options instance for the given {@code optionsClass}, that is,
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* the parsed options, or null if it is not among those available.
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*
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* <p>The returned options should be treated by library code as immutable and
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* a provider is permitted to return the same options instance multiple times.
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*/
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@Nullable <O extends OptionsBase> O getOptions(Class<O> optionsClass);
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}
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