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c0f8da0c6e
This was a surprisingly involved change. Some of the difficulties included java.util.Optional purposely not being Serializable (so I had to move a few Optionals in mapreduce classes to @Nullable) and having to add the Truth Java8 extension library for assertion support. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=171863777
56 lines
2.2 KiB
Java
56 lines
2.2 KiB
Java
// Copyright 2017 The Nomulus 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 google.registry.tldconfig.idn;
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import static google.registry.tldconfig.idn.IdnTableEnum.EXTENDED_LATIN;
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import static google.registry.tldconfig.idn.IdnTableEnum.JA;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.ImmutableMap;
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import google.registry.util.Idn;
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import google.registry.util.NonFinalForTesting;
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import java.util.Optional;
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/** Validates whether a given IDN label can be provisioned for a particular TLD. */
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public final class IdnLabelValidator {
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/** Most TLDs will use this generic list of IDN tables. */
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private static final ImmutableList<IdnTableEnum> DEFAULT_IDN_TABLES =
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ImmutableList.of(EXTENDED_LATIN, JA);
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/** Some TLDs have their own IDN tables, configured here. */
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@NonFinalForTesting
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private static ImmutableMap<String, ImmutableList<IdnTableEnum>> idnTableListsPerTld =
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ImmutableMap.of("xn--q9jyb4c", ImmutableList.of(EXTENDED_LATIN, JA));
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/**
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* Returns name of first matching {@link IdnTable} if domain label is valid for the given TLD.
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*
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* <p>A label is valid if it is considered valid by at least one configured IDN table for that
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* TLD. If no match is found, an absent value is returned.
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*/
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public static Optional<String> findValidIdnTableForTld(String label, String tld) {
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String unicodeString = Idn.toUnicode(label);
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for (IdnTableEnum idnTable
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: Optional.ofNullable(idnTableListsPerTld.get(tld)).orElse(DEFAULT_IDN_TABLES)) {
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if (idnTable.getTable().isValidLabel(unicodeString)) {
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return Optional.of(idnTable.getTable().getName());
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}
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}
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return Optional.empty();
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}
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private IdnLabelValidator() {}
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}
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