/*
* Intake, a command processing library
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) Intake team and contributors
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.intake.parametric.argument;
import com.sk89q.intake.parametric.MissingParameterException;
import com.sk89q.intake.context.CommandContext;
import com.sk89q.intake.parametric.ParameterException;
import com.sk89q.intake.util.StringUtils;
/**
* A virtual scope that does not actually read from the underlying
* {@link CommandContext}.
*/
public class StringArgumentStack implements ArgumentStack {
private final boolean nonNullBoolean;
private final CommandContext context;
private final String[] arguments;
private int index = 0;
/**
* Create a new instance using the given context.
*
* @param context the context
* @param arguments a list of arguments
* @param nonNullBoolean true to have {@link #nextBoolean()} return false instead of null
*/
public StringArgumentStack(
CommandContext context, String[] arguments, boolean nonNullBoolean) {
this.context = context;
this.arguments = arguments;
this.nonNullBoolean = nonNullBoolean;
}
/**
* Create a new instance using the given context.
*
* @param context the context
* @param arguments an argument string to be parsed
* @param nonNullBoolean true to have {@link #nextBoolean()} return false instead of null
*/
public StringArgumentStack(
CommandContext context, String arguments, boolean nonNullBoolean) {
this.context = context;
this.arguments = CommandContext.split(arguments);
this.nonNullBoolean = nonNullBoolean;
}
@Override
public String next() throws ParameterException {
try {
return arguments[index++];
} catch (ArrayIndexOutOfBoundsException e) {
throw new MissingParameterException();
}
}
@Override
public Integer nextInt() throws ParameterException {
try {
return Integer.parseInt(next());
} catch (NumberFormatException e) {
throw new ParameterException(
"Expected a number, got '" + context.getString(index - 1) + "'");
}
}
@Override
public Double nextDouble() throws ParameterException {
try {
return Double.parseDouble(next());
} catch (NumberFormatException e) {
throw new ParameterException(
"Expected a number, got '" + context.getString(index - 1) + "'");
}
}
@Override
public Boolean nextBoolean() throws ParameterException {
try {
return next().equalsIgnoreCase("true");
} catch (IndexOutOfBoundsException e) {
if (nonNullBoolean) { // Special case
return false;
}
throw new MissingParameterException();
}
}
@Override
public String remaining() throws ParameterException {
try {
String value = StringUtils.joinString(arguments, " ", index);
markConsumed();
return value;
} catch (IndexOutOfBoundsException e) {
throw new MissingParameterException();
}
}
@Override
public void markConsumed() {
index = arguments.length;
}
@Override
public CommandContext getContext() {
return context;
}
}