com.vityuk.ginger.provider.plural.DefaultPluralFormSelectorResolver.java Source code

Introduction

Here is the source code for com.vityuk.ginger.provider.plural.DefaultPluralFormSelectorResolver.java

Source

/*
 * Copyright 2013 Andriy Vityuk
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.vityuk.ginger.provider.plural;

import com.google.common.base.Throwables;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.util.concurrent.UncheckedExecutionException;

/**
 * Default {@link PluralFormSelectorResolver} implementation which looks up {@link PluralRule}
 * using {@code languageCode} and using it resolves selector for specified {@code count}.
 *
 * @author Andriy Vityuk
 */
public class DefaultPluralFormSelectorResolver implements PluralFormSelectorResolver {
    private final PluralRuleProvider pluralRuleProvider = new PluralRuleProvider();

    private final LoadingCache<String, PluralRule> pluralRuleCache;

    public DefaultPluralFormSelectorResolver() {
        this.pluralRuleCache = CacheBuilder.newBuilder().build(new CacheLoader<String, PluralRule>() {
            @Override
            public PluralRule load(String languageCode) throws Exception {
                return pluralRuleProvider.getPluralRule(languageCode);
            }
        });
    }

    @Override
    public String resolve(String languageCode, int count) {
        return resolvePluralRule(languageCode).select(count);
    }

    private PluralRule resolvePluralRule(String languageCode) {
        try {
            return pluralRuleCache.getUnchecked(languageCode);
        } catch (UncheckedExecutionException e) {
            throw Throwables.propagate(e.getCause());
        }
    }
}