CLDR-17106 add more fixed candidate items #3681
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package org.unicode.cldr.web; | ||
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| import com.google.common.collect.ImmutableList; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.List; | ||
| import java.util.regex.Pattern; | ||
| import org.unicode.cldr.util.PatternCache; | ||
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| abstract class FixedCandidateProvider | ||
| implements java.util.function.Function<String, Collection<String>> { | ||
| /** | ||
| * @returns a list of values (or null if not applicable) of any 'fixed' candidates for this | ||
| * XPath | ||
| */ | ||
| public abstract Collection<String> apply(String xpath); | ||
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| /** helper function to convert an Enum to an array of strings */ | ||
| static final <T extends Enum<T>> Collection<String> enumValueStrings(T forValues[]) { | ||
| final List<String> l = new ArrayList<String>(forValues.length); | ||
| for (final T t : forValues) { | ||
| l.add(t.toString()); | ||
| } | ||
| return ImmutableList.copyOf(l); | ||
| } | ||
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| /** Candidate provider using a Pattern Cache */ | ||
| abstract static class PatternCacheCandidateProvider extends FixedCandidateProvider { | ||
| final Pattern pattern; | ||
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| public PatternCacheCandidateProvider(String patternString) { | ||
| pattern = PatternCache.get(patternString); | ||
| } | ||
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| public Collection<String> apply(String xpath) { | ||
| if (pattern.matcher(xpath).matches()) { | ||
| return getCandidates(); | ||
| } else { | ||
| return null; // not applicable | ||
| } | ||
| } | ||
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| protected abstract Collection<String> getCandidates(); | ||
| } | ||
| /** Candidate provider for a single string (not regex) */ | ||
| abstract static class StringCandidateProvider extends FixedCandidateProvider { | ||
| final String pattern; | ||
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| public StringCandidateProvider(String xpath) { | ||
| pattern = xpath; | ||
| } | ||
|
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| public Collection<String> apply(String xpath) { | ||
| if (pattern.equals(xpath)) { | ||
| return getCandidates(); | ||
| } else { | ||
| return null; // not applicable | ||
| } | ||
| } | ||
|
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| protected abstract Collection<String> getCandidates(); | ||
| } | ||
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| /** create a provider that matches an fixed XPath and returns a set of values */ | ||
| public static <T extends Enum<T>> FixedCandidateProvider forEnumWithFixedXpath( | ||
| String xpath, T[] values) { | ||
| return new EnumStringCandidateProvider( | ||
| xpath, FixedCandidateProvider.enumValueStrings(values)); | ||
| } | ||
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| private static class EnumStringCandidateProvider extends StringCandidateProvider { | ||
| private final Collection<String> values; | ||
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| @Override | ||
| protected Collection<String> getCandidates() { | ||
| return values; | ||
| } | ||
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| EnumStringCandidateProvider(final String xpath, final Collection<String> values) { | ||
| super(xpath); | ||
| this.values = values; | ||
| } | ||
| } | ||
| } |
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these are not locale dependent, so kept in a separate static list.