Example usage for java.util Locale filter

Introduction

In this page you can find the example usage for java.util Locale filter.

Prototype

public static List<Locale> filter(List<LanguageRange> priorityList, Collection<Locale> locales) 

Source Link

Document

Returns a list of matching Locale instances using the filtering mechanism defined in RFC 4647.

Usage

From source file:com.michellemay.mappings.MappingsFactory.java

private Mapping createCustomMapping(MappingConfig mappingConfig) {
    if (StringUtils.isBlank(mappingConfig.name)) {
        throw new IllegalArgumentException("Blank mapping name!");
    }//w w  w. j av  a  2 s  .com

    Map<String, Locale> curMap = new TreeMap<String, Locale>(
            mappingConfig.casesensitive ? null : String.CASE_INSENSITIVE_ORDER);

    // Inherit all mappings from bases
    if (mappingConfig.extend != null) {
        for (String baseMappingName : mappingConfig.extend) {
            if (StringUtils.isBlank(baseMappingName) || !mappings.containsKey(baseMappingName)) {
                throw new IllegalStateException("Base mapping name '" + baseMappingName + "' does not exists!");
            }
            Mapping baseMapping = mappings.get(baseMappingName);
            baseMapping.getMapping().forEach(curMap::putIfAbsent);
        }
    }

    // Filter out unwanted languages
    if (StringUtils.isNotBlank(mappingConfig.filter)) {
        List<Locale.LanguageRange> priorityList = Locale.LanguageRange.parse(mappingConfig.filter);
        List<Locale> toKeep = Locale.filter(priorityList, curMap.values());
        curMap.entrySet().removeIf(e -> !toKeep.contains(e.getValue()));
    }

    // Add new values
    if (mappingConfig.add != null) {
        mappingConfig.add.forEach((lang, values) -> {
            Locale langLocale = LocaleUtils.toLocale(lang);
            String[] displayValues = values.split(",");
            for (String value : displayValues) {
                String cleanedValue = value.trim();
                if (!cleanedValue.isEmpty()) {
                    curMap.putIfAbsent(cleanedValue, langLocale);
                }
            }
        });
    }

    // Override values
    if (mappingConfig.override != null) {
        mappingConfig.override.forEach((lang, values) -> {
            Locale langLocale = LocaleUtils.toLocale(lang);

            // Remove all existing mappings
            String langTag = langLocale.toLanguageTag();
            curMap.entrySet().removeIf(e -> e.getValue().toLanguageTag().equals(langTag));

            // Add new mappings.
            String[] displayValues = values.split(",");
            for (String value : displayValues) {
                String cleanedValue = value.trim();
                if (!cleanedValue.isEmpty()) {
                    curMap.put(cleanedValue, langLocale);
                }
            }
        });
    }

    return new CustomMapping(mappingConfig.name.trim()).withCaseSensitive(mappingConfig.casesensitive)
            .withMapping(curMap);
}

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