Build biweekly inline

app/src/main/java/biweekly/Messages.java

@@ -0,0 +1,100 @@
+package biweekly;
+
+import java.text.MessageFormat;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+
+/*
+ Copyright (c) 2013-2023, Michael Angstadt
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met: 
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer. 
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution. 
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Singleton for accessing the i18n resource bundle.
+ * @author Michael Angstadt
+ */
+public enum Messages {
+	INSTANCE;
+
+	private final transient ResourceBundle messages;
+
+	Messages() {
+		messages = ResourceBundle.getBundle("biweekly/messages");
+	}
+
+	/**
+	 * Gets a validation warning message.
+	 * @param code the message code
+	 * @param args the message arguments
+	 * @return the message
+	 */
+	public String getValidationWarning(int code, Object... args) {
+		return getMessage("validate." + code, args);
+	}
+
+	/**
+	 * Gets a parser warning message.
+	 * @param code the message code
+	 * @param args the message arguments
+	 * @return the message
+	 */
+	public String getParseMessage(int code, Object... args) {
+		return getMessage("parse." + code, args);
+	}
+
+	/**
+	 * Gets an exception message.
+	 * @param code the message code
+	 * @param args the message arguments
+	 * @return the message or null if not found
+	 */
+	public String getExceptionMessage(int code, Object... args) {
+		return getMessage("exception." + code, args);
+	}
+
+	/**
+	 * Builds an {@link IllegalArgumentException} from an exception message.
+	 * @param code the message code
+	 * @param args the message arguments
+	 * @return the exception or null if the message was not found
+	 */
+	public IllegalArgumentException getIllegalArgumentException(int code, Object... args) {
+		String message = getExceptionMessage(code, args);
+		return (message == null) ? null : new IllegalArgumentException(message);
+	}
+
+	/**
+	 * Gets a message.
+	 * @param key the message key
+	 * @param args the message arguments
+	 * @return the message or null if not found
+	 */
+	public String getMessage(String key, Object... args) {
+		try {
+			String message = messages.getString(key);
+			return MessageFormat.format(message, args);
+		} catch (MissingResourceException e) {
+			return null;
+		}
+	}
+}