jp.terasoluna.fw.web.codelist.AbstractMultilingualCodeListLoader.java Source code

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Here is the source code for jp.terasoluna.fw.web.codelist.AbstractMultilingualCodeListLoader.java

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/*
 * Copyright (c) 2007 NTT DATA Corporation
 *
 * 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 jp.terasoluna.fw.web.codelist;

import java.util.List;
import java.util.Locale;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * ??{@link jp.terasoluna.fw.web.codelist.CodeListLoader}
 * ?NX?B
 *
 * <p>
 * NX??R?[hXg??P?[
 * R?[hXg}bv`??B
 * ?A}bv?P?[w
 * R?[hXg?\bh?B
 * <br> 
 * R?[hXg???ANXp?TuNX?B
 * 
 * @see DBCodeListLoader
 * @see MappedCodeListLoader
 * 
 */
public abstract class AbstractMultilingualCodeListLoader implements CodeListLoader {

    /**
     * ?ONX?B
     */
    private Log log = LogFactory.getLog(AbstractMultilingualCodeListLoader.class);

    /**
     * ??R?[hXg?}bv
     * @see jp.terasoluna.fw.web.codelist.CodeBean
     */
    protected Map<Locale, List<CodeBean>> localeMap = null;

    /**
     * ?P?[w??ftHg?P?[?B R?[hXg
     * ?P?[w???A ?P?[??B
     * ftHgT?[o?[JVMR?[h?P?[gp?B
     */
    protected Locale defaultLocale = new Locale(Locale.getDefault().getLanguage());

    /**
     * ftHg?P?[??B
     * 
     * @param defaultLocale ftHg?P?[
     */
    public void setDefaultLocale(Locale defaultLocale) {
        this.defaultLocale = defaultLocale;
    }

    /** 
     * R?[hXg?B
     *
     * R?[hXg {@link CodeBean} z?B<br>
     * ?R?[hXgAvP?[V??B
     * ?\bhI?[o?[Ch???A?WbN
     * R?[hXge?WeKv?B
     *
     * @return R?[hXg
     */
    public CodeBean[] getCodeBeans() {
        return createCodeBeans(defaultLocale);
    }

    /**
     * ?P?[wR?[hXg?B
     * <p>
     * R?[hXg {@link CodeBean} z?B<br>
     * ?w?P?[R?[hXg???A
     * ftHg?P?[R?[hXg?B
     * 
     * ?R?[hXgAvP?[V??B
     * ?\bhI?[o?[Ch???A?WbN
     * R?[hXge?WeKv?B
     *
     * @param locale ?P?[
     * @return R?[hXg
     */
    public CodeBean[] getCodeBeans(Locale locale) {

        if (log.isDebugEnabled()) {
            log.debug("getCodeBeans(" + locale + ") called.");
        }

        CodeBean[] result = createCodeBeans(locale);

        // R?[hXg???AftHg?P?[???
        if (locale != null && result.length == 0) {
            result = createCodeBeans(defaultLocale);
        }
        return result;
    }

    /**
     * ?P?[R?[hXg???B
     * <p>
     * ?w?P?[R?[hXg????A
     * ??P?[R?[hXg???B
     * 
     * @param locale ?P?[
     * @return R?[hXg
     */
    protected CodeBean[] createCodeBeans(Locale locale) {

        if (log.isDebugEnabled()) {
            log.debug("createCodeBeans(" + locale + ") called.");
        }

        if (localeMap == null) {
            if (log.isDebugEnabled()) {
                log.debug("field codeListsMap is null.");
            }
            // codeListsMap?z?B
            return new CodeBean[0];
        }

        if (locale == null) {
            if (log.isDebugEnabled()) {
                log.debug("arg locale is null. replace locale default : " + defaultLocale);
            }
            if (defaultLocale == null) {
                throw new IllegalStateException("Default locale is null.");
            }
            locale = defaultLocale;
        }

        List<CodeBean> codeLists = localeMap.get(locale);

        // R?[hXg???A??P?[???
        if (codeLists == null) {
            if (locale.getVariant().length() > 0) {
                return createCodeBeans(new Locale(locale.getLanguage(), locale.getCountry()));
            } else if (locale.getCountry().length() > 0) {
                return createCodeBeans(new Locale(locale.getLanguage()));
            }

            // codeLists?z?B
            return new CodeBean[0];
        }

        CodeBean[] cb = new CodeBean[codeLists.size()];
        for (int i = 0; i < codeLists.size(); i++) {
            cb[i] = new CodeBean();
            cb[i].setId(codeLists.get(i).getId());
            cb[i].setName(codeLists.get(i).getName());
        }
        return cb;
    }

    /**
     * R?[h?A?R?[h?AoAgR?[h?P?[???B
     * <p>
     * R?[hnull??ftHg?P?[p?B
     * 
     * @param language R?[h
     * @param country ?R?[h
     * @param variant oAgR?[h
     * @return ?P?[
     */
    protected Locale createLocale(String language, String country, String variant) {

        // R?[h????AftHg?P?[p
        if (language == null || language.length() == 0) {
            return defaultLocale;
        }
        // ?R?[h????AR?[h???P?[p
        if (country == null || country.length() == 0) {
            return new Locale(language);
        }
        // oAgR?[h????A
        // R?[h?A?R?[h???P?[p
        if (variant == null || variant.length() == 0) {
            return new Locale(language, country);
        }
        return new Locale(language, country, variant);
    }

}