/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.enterprise.agent.promptcmd;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import mazz.i18n.Msg;
import org.rhq.enterprise.agent.AgentMain;
import org.rhq.enterprise.agent.StringUtil;
import org.rhq.enterprise.agent.i18n.AgentI18NFactory;
import org.rhq.enterprise.agent.i18n.AgentI18NResourceKeys;
/**
* Displays help on a prompt command.
*
* @author John Mazzitelli
*/
public class HelpPromptCommand implements AgentPromptCommand {
private static final Msg MSG = AgentI18NFactory.getMsg();
/**
* @see AgentPromptCommand#getPromptCommandString()
*/
public String getPromptCommandString() {
return MSG.getMsg(AgentI18NResourceKeys.HELP);
}
/**
* @see AgentPromptCommand#execute(AgentMain, String[])
*/
public boolean execute(AgentMain agent, String[] args) {
if (args.length <= 1) {
Map<String, String> command_and_help = new HashMap<String, String>();
for (Iterator<String> iter = agent.getPromptCommands().keySet().iterator(); iter.hasNext();) {
String command_name = iter.next();
String help = getHelpForCommand(agent, command_name, false);
command_and_help.put(command_name, help);
}
agent.getOut().println(StringUtil.justifyKeyValueStrings(command_and_help));
} else {
if (args.length == 2) {
String command_name = args[1];
String help = getHelpForCommand(agent, command_name, true);
agent.getOut().println(help);
} else {
agent.getOut().println(MSG.getMsg(AgentI18NResourceKeys.HELP_SYNTAX_LABEL, getSyntax()));
}
}
return true;
}
/**
* Gets the help text for the given command.
*
* @param agent agent
* @param prompt_command_name the prompt command name
* @param detailed if <code>true</code>, gets the detailed help; <code>false</code> gets the short help
* summary
*
* @return the help text for the command
*/
private String getHelpForCommand(AgentMain agent, String prompt_command_name, boolean detailed) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
PrintStream ps = new PrintStream(out);
try {
Class clazz = agent.getPromptCommands().get(prompt_command_name);
AgentPromptCommand cmd_instance = (AgentPromptCommand) clazz.newInstance();
if (detailed) {
ps.println(MSG.getMsg(AgentI18NResourceKeys.HELP_SYNTAX_LABEL, cmd_instance.getSyntax()));
ps.println();
ps.println(cmd_instance.getDetailedHelp());
} else {
ps.print(cmd_instance.getHelp());
}
} catch (Exception e) {
ps.print(MSG.getMsg(AgentI18NResourceKeys.HELP_UNKNOWN, prompt_command_name));
}
return out.toString();
}
/**
* @see AgentPromptCommand#getSyntax()
*/
public String getSyntax() {
return MSG.getMsg(AgentI18NResourceKeys.HELP_SYNTAX);
}
/**
* @see AgentPromptCommand#getHelp()
*/
public String getHelp() {
return MSG.getMsg(AgentI18NResourceKeys.HELP_HELP);
}
/**
* @see AgentPromptCommand#getDetailedHelp()
*/
public String getDetailedHelp() {
return MSG.getMsg(AgentI18NResourceKeys.HELP_DETAILED_HELP);
}
}