50 lines
1.6 KiB
Java
50 lines
1.6 KiB
Java
/*
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* Copyright (C) 2019 Google Inc.
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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 com.google.copybara;
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import com.google.common.base.Preconditions;
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import com.google.common.collect.ImmutableBiMap;
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import com.google.common.collect.ImmutableMap;
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import com.google.copybara.transform.ReversibleFunction;
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import com.google.devtools.build.lib.syntax.Location;
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public class MapMapper implements ReversibleFunction<String, String> {
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private final ImmutableMap<String, String> map;
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private final Location location;
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MapMapper(ImmutableMap<String, String> map, Location location) {
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this.map = Preconditions.checkNotNull(map);
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this.location = location;
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}
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@Override
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public ReversibleFunction<String, String> reverseMapping() throws NonReversibleValidationException {
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try {
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return new MapMapper(ImmutableBiMap.copyOf(map).inverse(), location);
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} catch (IllegalArgumentException e) {
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throw new NonReversibleValidationException(location,
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"Non-reversible map: " + map + ": " + e.getMessage());
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}
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}
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@Override
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public String apply(String s) {
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String v = map.get(s);
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return v == null ? s : v;
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}
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}
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