translator.java

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/*
 * Copyright (c) 2000 Lyrisoft Solutions, Inc.
 * Used by permission
 */
package com.lyrisoft.util.i18n;

import java.util.Properties;

public class Translator {
    private static Properties _messages;

    public Translator() {
        this(new Properties());
    }

    public Translator(Properties p) {
        if (_messages == null) {
            _messages = p;
        }
    }

    public String getMessage(String key) {
        String s = _messages.getProperty(key);
        if (s == null) {
            throw new RuntimeException("No such key: " + key);
        }
        return s;
    }

    public String getMessage(String key, String arg1) {
        String[] args = { arg1 };
        return getMessage(key, args);
    }

    public String getMessage(String key, String arg1, String arg2) {
        String[] args = { arg1, arg2 };
        return getMessage(key, args);
    }

    public String getMessage(String key, String arg1, String arg2, String arg3) {
        String[] args = { arg1, arg2, arg3 };
        return getMessage(key, args);
    }

    public String getMessage(String key, String[] args) {
        String s = getMessage(key);
        StringBuffer sb = new StringBuffer();
        char[] raw = s.toCharArray();
        for (int i=0; i < raw.length; i++) {
            char c = raw[i];
//            System.err.println(i + ": " + c);
            if (c == '{') {
                int j=i;
                for (; j < raw.length; j++) {
                    if (raw[j] == '}') {
                        break;
                    }
                }
                int idx = extractInt(raw, i, j);
                sb.append(args[idx]);
                i = j;
            } else {
                sb.append(c);
            }
        }
        return sb.toString();
    }

    int extractInt(char[] buf, int start, int end) {
        start++;
//        System.err.println("extractInt: " + start + ", " + end);
        return Integer.parseInt(new String(buf, start, end-start));
    }
}