/*
* 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.fluent;
import com.sk89q.intake.CommandCallable;
import com.sk89q.intake.dispatcher.Dispatcher;
import com.sk89q.intake.dispatcher.SimpleDispatcher;
import com.sk89q.intake.parametric.ParametricBuilder;
/**
* A collection of commands.
*/
public class DispatcherNode {
private final CommandGraph graph;
private final DispatcherNode parent;
private final SimpleDispatcher dispatcher;
/**
* Create a new instance.
*
* @param graph the root fluent graph object
* @param parent the parent node, or null
* @param dispatcher the dispatcher for this node
*/
DispatcherNode(CommandGraph graph, DispatcherNode parent, SimpleDispatcher dispatcher) {
this.graph = graph;
this.parent = parent;
this.dispatcher = dispatcher;
}
/**
* Set the description.
*
* <p>This can only be used on {@link DispatcherNode}s returned by
* {@link #group(String...)}.</p>
*
* @param description the description
* @return this object
*/
public DispatcherNode describeAs(String description) {
dispatcher.getDescription().setDescription(description);
return this;
}
/**
* Register a command with this dispatcher.
*
* @param callable the executor
* @param alias the list of aliases, where the first alias is the primary one
*/
public void register(CommandCallable callable, String... alias) {
dispatcher.registerCommand(callable, alias);
}
/**
* Build and register a command with this dispatcher using the
* {@link ParametricBuilder} assigned on the root {@link CommandGraph}.
*
* @param object the object provided to the {@link ParametricBuilder}
* @return this object
* @see ParametricBuilder#registerMethodsAsCommands(Dispatcher, Object)
*/
public DispatcherNode registerMethods(Object object) {
ParametricBuilder builder = graph.getBuilder();
if (builder == null) {
throw new RuntimeException("No ParametricBuilder set");
}
builder.registerMethodsAsCommands(getDispatcher(), object);
return this;
}
/**
* Create a new command that will contain sub-commands.
*
* <p>The object returned by this method can be used to add sub-commands. To
* return to this "parent" context, use {@link DispatcherNode#graph()}.</p>
*
* @param alias the list of aliases, where the first alias is the primary one
* @return an object to place sub-commands
*/
public DispatcherNode group(String... alias) {
SimpleDispatcher command = new SimpleDispatcher();
getDispatcher().registerCommand(command, alias);
return new DispatcherNode(graph, this, command);
}
/**
* Return the parent node.
*
* @return the parent node
* @throws RuntimeException if there is no parent node.
*/
public DispatcherNode parent() {
if (parent != null) {
return parent;
}
throw new RuntimeException("This node does not have a parent");
}
/**
* Get the root command graph.
*
* @return the root command graph
*/
public CommandGraph graph() {
return graph;
}
/**
* Get the underlying dispatcher of this object.
*
* @return the dispatcher
*/
public Dispatcher getDispatcher() {
return dispatcher;
}
}