/*
|
* CDDL HEADER START
|
*
|
* The contents of this file are subject to the terms of the
|
* Common Development and Distribution License, Version 1.0 only
|
* (the "License"). You may not use this file except in compliance
|
* with the License.
|
*
|
* You can obtain a copy of the license at
|
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
|
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
|
* See the License for the specific language governing permissions
|
* and limitations under the License.
|
*
|
* When distributing Covered Code, include this CDDL HEADER in each
|
* file and include the License file at
|
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
|
* add the following below this CDDL HEADER, with the fields enclosed
|
* by brackets "[]" replaced with your own identifying information:
|
* Portions Copyright [yyyy] [name of copyright owner]
|
*
|
* CDDL HEADER END
|
*
|
*
|
* Copyright 2008-2009 Sun Microsystems, Inc.
|
*/
|
package com.sun.opends.sdk.tools;
|
|
|
|
import static com.sun.opends.sdk.messages.Messages.*;
|
import static com.sun.opends.sdk.tools.Utils.*;
|
|
import java.io.*;
|
import java.util.logging.Level;
|
import java.util.logging.Logger;
|
|
import com.sun.opends.sdk.util.Message;
|
|
|
|
/**
|
* This class provides an abstract base class which can be used as the
|
* basis of a console-based application.
|
*/
|
abstract class ConsoleApplication
|
{
|
private static final class NullOutputStream extends OutputStream
|
{
|
/**
|
* The singleton instance for this class.
|
*/
|
private static final NullOutputStream instance = new NullOutputStream();
|
|
/**
|
* The singleton print stream tied to the null output stream.
|
*/
|
private static final PrintStream printStream = new PrintStream(
|
instance);
|
|
|
|
/**
|
* Retrieves a print stream using this null output stream.
|
*
|
* @return A print stream using this null output stream.
|
*/
|
static PrintStream printStream()
|
{
|
return printStream;
|
}
|
|
|
|
/**
|
* Creates a new instance of this null output stream.
|
*/
|
private NullOutputStream()
|
{
|
// No implementation is required.
|
}
|
|
|
|
/**
|
* Closes the output stream. This has no effect.
|
*/
|
public void close()
|
{
|
// No implementation is required.
|
}
|
|
|
|
/**
|
* Flushes the output stream. This has no effect.
|
*/
|
public void flush()
|
{
|
// No implementation is required.
|
}
|
|
|
|
/**
|
* Writes the provided data to this output stream. This has no
|
* effect.
|
*
|
* @param b
|
* The byte array containing the data to be written.
|
*/
|
public void write(byte[] b)
|
{
|
// No implementation is required.
|
}
|
|
|
|
/**
|
* Writes the provided data to this output stream. This has no
|
* effect.
|
*
|
* @param b
|
* The byte array containing the data to be written.
|
* @param off
|
* The offset at which the real data begins.
|
* @param len
|
* The number of bytes to be written.
|
*/
|
public void write(byte[] b, int off, int len)
|
{
|
// No implementation is required.
|
}
|
|
|
|
/**
|
* Writes the provided byte to this output stream. This has no
|
* effect.
|
*
|
* @param b
|
* The byte to be written.
|
*/
|
public void write(int b)
|
{
|
// No implementation is required.
|
}
|
}
|
|
|
|
/**
|
* A null reader.
|
*/
|
private static final class NullReader extends Reader
|
{
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public void close() throws IOException
|
{
|
// Do nothing.
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public int read(char[] cbuf, int off, int len) throws IOException
|
{
|
return -1;
|
}
|
}
|
|
|
|
// The error stream which this application should use.
|
private final PrintStream err;
|
|
// The input stream reader which this application should use.
|
private final BufferedReader reader;
|
|
private final InputStream in;
|
|
// The output stream which this application should use.
|
private final PrintStream out;
|
|
|
|
/**
|
* Creates a new console application instance.
|
*
|
* @param in
|
* The application input stream.
|
* @param out
|
* The application output stream.
|
* @param err
|
* The application error stream.
|
*/
|
ConsoleApplication(InputStream in, OutputStream out, OutputStream err)
|
{
|
this.in = in;
|
if (in != null)
|
{
|
this.reader = new BufferedReader(new InputStreamReader(in));
|
}
|
else
|
{
|
this.reader = new BufferedReader(new NullReader());
|
}
|
|
if (out != null)
|
{
|
this.out = new PrintStream(out);
|
}
|
else
|
{
|
this.out = NullOutputStream.printStream();
|
}
|
|
if (err != null)
|
{
|
this.err = new PrintStream(err);
|
}
|
else
|
{
|
this.err = NullOutputStream.printStream();
|
}
|
}
|
|
|
|
/**
|
* Gets the application error stream.
|
*
|
* @return Returns the application error stream.
|
*/
|
final PrintStream getErrorStream()
|
{
|
return err;
|
}
|
|
|
|
/**
|
* Gets the application input stream reader.
|
*
|
* @return Returns the application input stream.
|
*/
|
final BufferedReader getInputReader()
|
{
|
return reader;
|
}
|
|
|
|
/**
|
* Gets the application input stream.
|
*
|
* @return Returns the application input stream.
|
*/
|
final InputStream getInputStream()
|
{
|
return in;
|
}
|
|
|
|
/**
|
* Gets the application output stream.
|
*
|
* @return Returns the application output stream.
|
*/
|
final PrintStream getOutputStream()
|
{
|
return out;
|
}
|
|
|
|
/**
|
* Indicates whether or not the user has requested advanced mode.
|
*
|
* @return Returns <code>true</code> if the user has requested
|
* advanced mode.
|
*/
|
abstract boolean isAdvancedMode();
|
|
|
|
/**
|
* Indicates whether or not the user has requested interactive
|
* behavior.
|
*
|
* @return Returns <code>true</code> if the user has requested
|
* interactive behavior.
|
*/
|
abstract boolean isInteractive();
|
|
|
|
/**
|
* Indicates whether or not this console application is running in its
|
* menu-driven mode. This can be used to dictate whether output should
|
* go to the error stream or not. In addition, it may also dictate
|
* whether or not sub-menus should display a cancel option as well as
|
* a quit option.
|
*
|
* @return Returns <code>true</code> if this console application is
|
* running in its menu-driven mode.
|
*/
|
abstract boolean isMenuDrivenMode();
|
|
|
|
/**
|
* Indicates whether or not the user has requested quiet output.
|
*
|
* @return Returns <code>true</code> if the user has requested quiet
|
* output.
|
*/
|
abstract boolean isQuiet();
|
|
|
|
/**
|
* Indicates whether or not the user has requested script-friendly
|
* output.
|
*
|
* @return Returns <code>true</code> if the user has requested
|
* script-friendly output.
|
*/
|
abstract boolean isScriptFriendly();
|
|
|
|
/**
|
* Indicates whether or not the user has requested verbose output.
|
*
|
* @return Returns <code>true</code> if the user has requested verbose
|
* output.
|
*/
|
abstract boolean isVerbose();
|
|
|
|
/**
|
* Interactively prompts the user to press return to continue. This
|
* method should be called in situations where a user needs to be
|
* given a chance to read some documentation before continuing
|
* (continuing may cause the documentation to be scrolled out of
|
* view).
|
*/
|
final void pressReturnToContinue()
|
{
|
Message msg = INFO_MENU_PROMPT_RETURN_TO_CONTINUE.get();
|
try
|
{
|
readLineOfInput(msg);
|
}
|
catch (CLIException e)
|
{
|
// Ignore the exception - applications don't care.
|
}
|
}
|
|
|
|
/**
|
* Displays a blank line to the error stream.
|
*/
|
final void println()
|
{
|
err.println();
|
}
|
|
|
|
/**
|
* Displays a message to the error stream.
|
*
|
* @param msg
|
* The message.
|
*/
|
final void println(Message msg)
|
{
|
err.println(wrapText(msg, MAX_LINE_WIDTH));
|
}
|
|
|
|
/**
|
* Displays a message to the error stream.
|
*
|
* @param msg
|
* The message.
|
*/
|
final void print(Message msg)
|
{
|
err.print(wrapText(msg, MAX_LINE_WIDTH));
|
}
|
|
|
|
/**
|
* Displays a blank line to the output stream if we are not in quiet
|
* mode.
|
*/
|
final void printlnProgress()
|
{
|
if (!isQuiet())
|
{
|
out.println();
|
}
|
}
|
|
|
|
/**
|
* Displays a message to the output stream if we are not in quiet
|
* mode.
|
*
|
* @param msg
|
* The message.
|
*/
|
final void printProgress(Message msg)
|
{
|
if (!isQuiet())
|
{
|
out.print(msg);
|
}
|
}
|
|
|
|
/**
|
* Displays a message to the error stream indented by the specified
|
* number of columns.
|
*
|
* @param msg
|
* The message.
|
* @param indent
|
* The number of columns to indent.
|
*/
|
final void println(Message msg, int indent)
|
{
|
err.println(wrapText(msg, MAX_LINE_WIDTH, indent));
|
}
|
|
|
|
/**
|
* Displays a message to the error stream if verbose mode is enabled.
|
*
|
* @param msg
|
* The verbose message.
|
*/
|
final void printVerboseMessage(Message msg)
|
{
|
if (isVerbose() || isInteractive())
|
{
|
err.println(wrapText(msg, MAX_LINE_WIDTH));
|
}
|
}
|
|
|
|
/**
|
* Interactively retrieves a line of input from the console.
|
*
|
* @param prompt
|
* The prompt.
|
* @return Returns the line of input, or <code>null</code> if the end
|
* of input has been reached.
|
* @throws CLIException
|
* If the line of input could not be retrieved for some
|
* reason.
|
*/
|
final String readLineOfInput(Message prompt) throws CLIException
|
{
|
if (prompt != null)
|
{
|
err.print(wrapText(prompt, MAX_LINE_WIDTH));
|
err.print(" ");
|
}
|
try
|
{
|
String s = reader.readLine();
|
if (s == null)
|
{
|
throw CLIException.adaptInputException(new EOFException(
|
"End of input"));
|
}
|
else
|
{
|
return s;
|
}
|
}
|
catch (IOException e)
|
{
|
throw CLIException.adaptInputException(e);
|
}
|
}
|
|
|
|
/**
|
* Commodity method that interactively prompts (on error output) the
|
* user to provide a string value. Any non-empty string will be
|
* allowed (the empty string will indicate that the default should be
|
* used, if there is one).
|
*
|
* @param prompt
|
* The prompt to present to the user.
|
* @param defaultValue
|
* The default value to assume if the user presses ENTER
|
* without typing anything, or <CODE>null</CODE> if there
|
* should not be a default and the user must explicitly
|
* provide a value.
|
* @throws CLIException
|
* If the line of input could not be retrieved for some
|
* reason.
|
* @return The string value read from the user.
|
*/
|
final String readInput(Message prompt, String defaultValue)
|
throws CLIException
|
{
|
while (true)
|
{
|
if (defaultValue != null)
|
{
|
prompt = INFO_PROMPT_SINGLE_DEFAULT.get(prompt.toString(),
|
defaultValue);
|
}
|
String response = readLineOfInput(prompt);
|
|
if ("".equals(response))
|
{
|
if (defaultValue == null)
|
{
|
print(INFO_ERROR_EMPTY_RESPONSE.get());
|
}
|
else
|
{
|
return defaultValue;
|
}
|
}
|
else
|
{
|
return response;
|
}
|
}
|
}
|
|
|
|
/**
|
* Commodity method that interactively prompts (on error output) the
|
* user to provide a string value. Any non-empty string will be
|
* allowed (the empty string will indicate that the default should be
|
* used, if there is one). If an error occurs a message will be logged
|
* to the provided logger.
|
*
|
* @param prompt
|
* The prompt to present to the user.
|
* @param defaultValue
|
* The default value to assume if the user presses ENTER
|
* without typing anything, or <CODE>null</CODE> if there
|
* should not be a default and the user must explicitly
|
* provide a value.
|
* @param logger
|
* the Logger to be used to log the error message.
|
* @return The string value read from the user.
|
*/
|
final String readInput(Message prompt, String defaultValue,
|
Logger logger)
|
{
|
String s = defaultValue;
|
try
|
{
|
s = readInput(prompt, defaultValue);
|
}
|
catch (CLIException ce)
|
{
|
logger.log(Level.WARNING, "Error reading input: " + ce, ce);
|
}
|
return s;
|
}
|
|
}
|
