001package ezvcard;
002
003import java.text.MessageFormat;
004import java.util.MissingResourceException;
005import java.util.ResourceBundle;
006
007/*
008 Copyright (c) 2012-2023, Michael Angstadt
009 All rights reserved.
010
011 Redistribution and use in source and binary forms, with or without
012 modification, are permitted provided that the following conditions are met: 
013
014 1. Redistributions of source code must retain the above copyright notice, this
015 list of conditions and the following disclaimer. 
016 2. Redistributions in binary form must reproduce the above copyright notice,
017 this list of conditions and the following disclaimer in the documentation
018 and/or other materials provided with the distribution. 
019
020 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
021 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
022 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
023 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
024 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
025 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
026 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
027 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
028 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
029 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
030 */
031
032/**
033 * Singleton for accessing the i18n resource bundle.
034 * @author Michael Angstadt
035 */
036public enum Messages {
037        INSTANCE;
038
039        private final ResourceBundle messages;
040
041        Messages() {
042                messages = ResourceBundle.getBundle("ezvcard/messages");
043        }
044
045        /**
046         * Gets a validation warning message.
047         * @param code the message code
048         * @param args the message arguments
049         * @return the message or null if not found
050         */
051        public String getValidationWarning(int code, Object... args) {
052                return getMessage("validate." + code, args);
053        }
054
055        /**
056         * Gets a parser warning message.
057         * @param code the message code
058         * @param args the message arguments
059         * @return the message or null if not found
060         */
061        public String getParseMessage(int code, Object... args) {
062                return getMessage("parse." + code, args);
063        }
064
065        /**
066         * Gets an exception message.
067         * @param code the message code
068         * @param args the message arguments
069         * @return the message or null if not found
070         */
071        public String getExceptionMessage(int code, Object... args) {
072                String message = getMessage("exception." + code, args);
073                return (message == null) ? null : getMessage("exception.0", code, message);
074        }
075
076        /**
077         * Builds an {@link IllegalArgumentException} from an exception message.
078         * @param code the message code
079         * @param args the message arguments
080         * @return the exception or null if the message was not found
081         */
082        public IllegalArgumentException getIllegalArgumentException(int code, Object... args) {
083                String message = getExceptionMessage(code, args);
084                return (message == null) ? null : new IllegalArgumentException(message);
085        }
086
087        /**
088         * Gets a message.
089         * @param key the message key
090         * @param args the message arguments
091         * @return the message or null if not found
092         */
093        public String getMessage(String key, Object... args) {
094                try {
095                        String message = messages.getString(key);
096                        return MessageFormat.format(message, args);
097                } catch (MissingResourceException e) {
098                        return null;
099                }
100        }
101}