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package org.apache.commons.codec.language.bm; |
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import java.io.InputStream; |
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import java.util.Collections; |
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import java.util.EnumMap; |
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import java.util.HashSet; |
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import java.util.Map; |
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import java.util.NoSuchElementException; |
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import java.util.Scanner; |
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import java.util.Set; |
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public class Languages { |
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61 | 71578 | public static abstract class LanguageSet { |
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public static LanguageSet from(final Set<String> langs) { |
64 | 119978 | return langs.isEmpty() ? NO_LANGUAGES : new SomeLanguages(langs); |
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} |
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public abstract boolean contains(String language); |
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public abstract String getAny(); |
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public abstract boolean isEmpty(); |
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public abstract boolean isSingleton(); |
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public abstract LanguageSet restrictTo(LanguageSet other); |
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} |
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81 | 71576 | public static final class SomeLanguages extends LanguageSet { |
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private final Set<String> languages; |
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84 | 71576 | private SomeLanguages(final Set<String> languages) { |
85 | 71576 | this.languages = Collections.unmodifiableSet(languages); |
86 | 71576 | } |
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@Override |
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public boolean contains(final String language) { |
90 | 16 | return this.languages.contains(language); |
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} |
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@Override |
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public String getAny() { |
95 | 372 | return this.languages.iterator().next(); |
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} |
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public Set<String> getLanguages() { |
99 | 0 | return this.languages; |
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} |
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@Override |
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public boolean isEmpty() { |
104 | 126053 | return this.languages.isEmpty(); |
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} |
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@Override |
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public boolean isSingleton() { |
109 | 134236 | return this.languages.size() == 1; |
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} |
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@Override |
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public LanguageSet restrictTo(final LanguageSet other) { |
114 | 173742 | if (other == NO_LANGUAGES) { |
115 | 0 | return other; |
116 | 173742 | } else if (other == ANY_LANGUAGE) { |
117 | 119505 | return this; |
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} else { |
119 | 54237 | final SomeLanguages sl = (SomeLanguages) other; |
120 | 54237 | if (sl.languages.containsAll(languages)) { |
121 | 2042 | return this; |
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} else { |
123 | 52195 | final Set<String> ls = new HashSet<String>(this.languages); |
124 | 52195 | ls.retainAll(sl.languages); |
125 | 52195 | return from(ls); |
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} |
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} |
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} |
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@Override |
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public String toString() { |
132 | 16 | return "Languages(" + languages.toString() + ")"; |
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} |
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} |
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public static final String ANY = "any"; |
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139 | 1 | private static final Map<NameType, Languages> LANGUAGES = new EnumMap<NameType, Languages>(NameType.class); |
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static { |
142 | 4 | for (final NameType s : NameType.values()) { |
143 | 3 | LANGUAGES.put(s, getInstance(langResourceName(s))); |
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} |
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} |
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public static Languages getInstance(final NameType nameType) { |
148 | 13 | return LANGUAGES.get(nameType); |
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} |
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public static Languages getInstance(final String languagesResourceName) { |
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153 | 4 | final Set<String> ls = new HashSet<String>(); |
154 | 4 | final InputStream langIS = Languages.class.getClassLoader().getResourceAsStream(languagesResourceName); |
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156 | 4 | if (langIS == null) { |
157 | 1 | throw new IllegalArgumentException("Unable to resolve required resource: " + languagesResourceName); |
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} |
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160 | 3 | final Scanner lsScanner = new Scanner(langIS, ResourceConstants.ENCODING); |
161 | 3 | boolean inExtendedComment = false; |
162 | 90 | while (lsScanner.hasNextLine()) { |
163 | 87 | final String line = lsScanner.nextLine().trim(); |
164 | 87 | if (inExtendedComment) { |
165 | 45 | if (line.endsWith(ResourceConstants.EXT_CMT_END)) { |
166 | 3 | inExtendedComment = false; |
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} |
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} else { |
169 | 42 | if (line.startsWith(ResourceConstants.EXT_CMT_START)) { |
170 | 3 | inExtendedComment = true; |
171 | 39 | } else if (line.length() > 0) { |
172 | 36 | ls.add(line); |
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} |
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} |
175 | 87 | } |
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177 | 3 | return new Languages(Collections.unmodifiableSet(ls)); |
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} |
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private static String langResourceName(final NameType nameType) { |
181 | 3 | return String.format("org/apache/commons/codec/language/bm/%s_languages.txt", nameType.getName()); |
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} |
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private final Set<String> languages; |
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189 | 1 | public static final LanguageSet NO_LANGUAGES = new LanguageSet() { |
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@Override |
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public boolean contains(final String language) { |
192 | 0 | return false; |
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} |
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@Override |
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public String getAny() { |
197 | 0 | throw new NoSuchElementException("Can't fetch any language from the empty language set."); |
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} |
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@Override |
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public boolean isEmpty() { |
202 | 48350 | return true; |
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} |
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@Override |
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public boolean isSingleton() { |
207 | 0 | return false; |
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} |
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@Override |
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public LanguageSet restrictTo(final LanguageSet other) { |
212 | 0 | return this; |
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} |
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@Override |
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public String toString() { |
217 | 0 | return "NO_LANGUAGES"; |
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} |
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}; |
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224 | 1 | public static final LanguageSet ANY_LANGUAGE = new LanguageSet() { |
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@Override |
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public boolean contains(final String language) { |
227 | 2 | return true; |
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} |
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@Override |
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public String getAny() { |
232 | 0 | throw new NoSuchElementException("Can't fetch any language from the any language set."); |
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} |
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@Override |
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public boolean isEmpty() { |
237 | 1434 | return false; |
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} |
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@Override |
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public boolean isSingleton() { |
242 | 100 | return false; |
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} |
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@Override |
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public LanguageSet restrictTo(final LanguageSet other) { |
247 | 2095 | return other; |
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} |
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@Override |
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public String toString() { |
252 | 2 | return "ANY_LANGUAGE"; |
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} |
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}; |
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256 | 3 | private Languages(final Set<String> languages) { |
257 | 3 | this.languages = languages; |
258 | 3 | } |
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public Set<String> getLanguages() { |
261 | 67171 | return this.languages; |
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} |
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} |