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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.jasper.compiler;

import java.text.MessageFormat;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.apache.jasper.util.ExceptionUtils;

/**
 * Class responsible for converting error codes to corresponding localized
 * error messages.
 *
 * @author Jan Luehe
 */
public class Localizer {

    private static ResourceBundle bundle = null;
    
    static {
        try {
        bundle = ResourceBundle.getBundle(
            "org.apache.jasper.resources.LocalStrings");
        } catch (Throwable t) {
            ExceptionUtils.handleThrowable(t);
            t.printStackTrace();
        }
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode) {
        String errMsg = errCode;
        try {
            errMsg = bundle.getString(errCode);
        } catch (MissingResourceException e) {
        }
        return errMsg;
    }

    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg Argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg) {
        return getMessage(errCode, new Object[] {arg});
    }

    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg1 First argument for parametric replacement
     * @param arg2 Second argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2) {
        return getMessage(errCode, new Object[] {arg1, arg2});
    }
    
    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg1 First argument for parametric replacement
     * @param arg2 Second argument for parametric replacement
     * @param arg3 Third argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2,
                                    String arg3) {
        return getMessage(errCode, new Object[] {arg1, arg2, arg3});
    }

    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg1 First argument for parametric replacement
     * @param arg2 Second argument for parametric replacement
     * @param arg3 Third argument for parametric replacement
     * @param arg4 Fourth argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2,
                                    String arg3, String arg4) {
        return getMessage(errCode, new Object[] {arg1, arg2, arg3, arg4});
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param args Arguments for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, Object[] args) {
        String errMsg = errCode;
        try {
            errMsg = bundle.getString(errCode);
            if (args != null) {
                MessageFormat formatter = new MessageFormat(errMsg);
                errMsg = formatter.format(args);
            }
        } catch (MissingResourceException e) {
        }
        
        return errMsg;
    }
}




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