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core functionalities of asta4d framework, including template and snippt implemention

There is a newer version: 1.2-M2

package com.astamuse.asta4d.util.i18n;

import java.util.Locale;

import com.astamuse.asta4d.util.i18n.pattern.JDKResourceBundleMessagePatternRetriever;
import com.astamuse.asta4d.util.i18n.pattern.MessagePatternRetriever;

/**
 * The sub class of this class should not return null in all the getMessage
 * methods. Returns empty string or key instead.
 * 
 * 
 * @author e-ryu
 * 
 */
public abstract class I18nMessageHelper {

    private MessagePatternRetriever messagePatternRetriever;

    public I18nMessageHelper() {
        this(new JDKResourceBundleMessagePatternRetriever());
    }

    public I18nMessageHelper(MessagePatternRetriever messagePatternRetriever) {
        this.messagePatternRetriever = messagePatternRetriever;
    }

    public MessagePatternRetriever getMessagePatternRetriever() {
        return messagePatternRetriever;
    }

    public void setMessagePatternRetriever(MessagePatternRetriever messagePatternRetriever) {
        this.messagePatternRetriever = messagePatternRetriever;
    }

    /**
     * retrieve message by given key
     * 
     * @param key
     * @return retrieved message, empty string or the given key if message not
     *         found(cannot be null)
     */
    public abstract String getMessage(String key);

    /**
     * retrieve message by given locale and key
     * 
     * @param locale
     * @param key
     * @return retrieved message, empty string or the given key if message not
     *         found(cannot be null)
     */
    public abstract String getMessage(Locale locale, String key);

    /**
     * retrieve message by given key
     * 
     * @param key
     * @param defaultPattern
     * @return retrieved message, return defaultPattern#toString() if message
     *         not found
     */
    public abstract String getMessageWithDefault(String key, Object defaultPattern);

    /**
     * retrieve message by given locale and key
     * 
     * @param locale
     * @param key
     * @param defaultPattern
     * @return retrieved message, return defaultPattern#toString() if message
     *         not found
     */
    public abstract String getMessageWithDefault(Locale locale, String key, Object defaultPattern);
}