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	/*
	* Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	* This source code is provided to illustrate the usage of a given feature
	* or technique and has been deliberately simplified. Additional steps
	* required for a production-quality application, such as security checks,
	* input validation and proper error handling, might not be present in
	* this sample code.
	*/

	package com.sun.tools.example.debug.tty;

	import java.util.*;
	import java.text.MessageFormat;
	/**
	* Internationalization (i18n) convenience methods for jdb.
	*
	* All program output should flow through these methods, and this is
	* the only class that should be printing directly or otherwise
	* accessing System.[out,err].
	*
	* @bug 4348376
	* @author Tim Bell
	*/
	public class MessageOutput {
	/**
	* The resource bundle containing localizable message content.
	* This is loaded by TTY.main() at start-up
	*/
	static ResourceBundle textResources;

	/** Our message formatter. Allocated once, used many times */
	private static MessageFormat messageFormat;

	/**
	* Fatal shutdown notification. This is sent to System.err
	* instead of System.out
	*/
	static void fatalError(String messageKey) {
	System.err.println();
	System.err.println(format("Fatal error"));
	System.err.println(format(messageKey));
	Env.shutdown();
	}

	/**
	* "Format" a string by doing a simple key lookup.
	*/
	static String format(String key) {
	return (textResources.getString(key));
	}

	/**
	* Fetch and format a message with one string argument.
	* This is the most common usage.
	*/
	static String format(String key, String argument) {
	return format(key, new Object [] {argument});
	}

	/**
	* Fetch a string by key lookup and format in the arguments.
	*/
	static synchronized String format(String key, Object [] arguments) {
	if (messageFormat == null) {
	messageFormat = new MessageFormat (textResources.getString(key));
	} else {
	messageFormat.applyPattern (textResources.getString(key));
	}
	return (messageFormat.format (arguments));
	}

	/**
	* Print directly to System.out.
	* Every rule has a few exceptions.
	* The exceptions to "must use the MessageOutput formatters" are:
	* VMConnection.dumpStream()
	* TTY.monitorCommand()
	* TTY.TTY() (for the '!!' command only)
	* Commands.java (multiple locations)
	* These are the only sites that should be calling this
	* method.
	*/
	static void printDirectln(String line) {
	System.out.println(line);
	}
	static void printDirect(String line) {
	System.out.print(line);
	}
	static void printDirect(char c) {
	System.out.print(c);
	}

	/**
	* Print a newline.
	* Use this instead of '\n'
	*/
	static void println() {
	System.out.println();
	}

	/**
	* Format and print a simple string.
	*/
	static void print(String key) {
	System.out.print(format(key));
	}
	/**
	* Format and print a simple string.
	*/
	static void println(String key) {
	System.out.println(format(key));
	}


	/**
	* Fetch, format and print a message with one string argument.
	* This is the most common usage.
	*/
	static void print(String key, String argument) {
	System.out.print(format(key, argument));
	}
	static void println(String key, String argument) {
	System.out.println(format(key, argument));
	}

	/**
	* Fetch, format and print a message with an arbitrary
	* number of message arguments.
	*/
	static void println(String key, Object [] arguments) {
	System.out.println(format(key, arguments));
	}

	/**
	* Print a newline, followed by the string.
	*/
	static void lnprint(String key) {
	System.out.println();
	System.out.print(textResources.getString(key));
	}

	static void lnprint(String key, String argument) {
	System.out.println();
	System.out.print(format(key, argument));
	}

	static void lnprint(String key, Object [] arguments) {
	System.out.println();
	System.out.print(format(key, arguments));
	}

	/**
	* Print an exception message with a stack trace.
	*/
	static void printException(String key, Exception e) {
	if (key != null) {
	try {
	println(key);
	} catch (MissingResourceException mex) {
	printDirectln(key);
	}
	}
	System.out.flush();
	e.printStackTrace();
	}

	static void printPrompt() {
	ThreadInfo threadInfo = ThreadInfo.getCurrentThreadInfo();
	if (threadInfo == null) {
	System.out.print
	(MessageOutput.format("jdb prompt with no current thread"));
	} else {
	System.out.print
	(MessageOutput.format("jdb prompt thread name and current stack frame",
	new Object [] {
	threadInfo.getThread().name(),
	new Integer (threadInfo.getCurrentFrameIndex() + 1)}));
	}
	System.out.flush();
	}
	}

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