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package org.zodiac.template.base.impl;

import java.util.List;
import java.util.Locale;

import org.zodiac.sdk.toolkit.util.LocaleUtil;

/**
 * 根据当前locale，查找最匹配的本地化模板。
 * 
 * 例如：对于模板test.vm，假如当前locale为zh_CN，则依次尝试查找：
 * 
 * 
 * test_zh_CN.vm
 * test_zh.vm
 * test.vm
 * 
 */
public class SearchLocalizedTemplatesStrategy implements TemplateSearchingStrategy {
    public Object getKey(String templateName) {
        return getCurrentLocale();
    }

    public boolean findTemplate(TemplateMatcher matcher) {
        List localizedTemplateNames =
            LocaleUtil.calculateBundleNames(matcher.getTemplateNameWithoutExtension(), getCurrentLocale(), true);

        for (String name : localizedTemplateNames) {
            matcher.setTemplateNameWithoutExtension(name);

            if (matcher.findTemplate()) {
                return true;
            }
        }

        return false;
    }

    private Locale getCurrentLocale() {
        return LocaleUtil.getContext().getLocale();
    }
}