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package bjc.utils.cli;
/**
* Generic command implementation.
*
* @author ben
*
*/
public class GenericCommand implements ICommand {
/*
* The behavior for invoking the command.
*/
private ICommandHandler handler;
/*
* The help for the command.
*/
private ICommandHelp help;
/**
* Create a new generic command.
*
* @param handler
* The handler to use for the command.
* @param description
* The description of the command. May be null, in which
* case a default is provided.
* @param help
* The detailed help message for the command. May be
* null, in which case the description is repeated for
* the detailed help.
*/
public GenericCommand(ICommandHandler handler, String description, String help) {
if(handler == null) throw new NullPointerException("Command handler must not be null");
this.handler = handler;
if(description == null) {
this.help = new NullHelp();
} else {
this.help = new GenericHelp(description, help);
}
}
@Override
public ICommand aliased() {
return new DelegatingCommand(this);
}
@Override
public ICommandHandler getHandler() {
return handler;
}
@Override
public ICommandHelp getHelp() {
return help;
}
@Override
public boolean isAlias() {
return false;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("GenericCommand [");
if(help != null) {
builder.append("help=");
builder.append(help);
}
builder.append("]");
return builder.toString();
}
}
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