de.xaniox.heavyspleef.addon.access.CommandManagerAccess.java Source code

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Here is the source code for de.xaniox.heavyspleef.addon.access.CommandManagerAccess.java

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/*
 * This file is part of HeavySpleef.
 * Copyright (c) 2014-2016 Matthias Werning
 *
 * 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, 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package de.xaniox.heavyspleef.addon.access;

import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import de.xaniox.heavyspleef.addon.AddOn;
import de.xaniox.heavyspleef.commands.base.CommandManager;
import org.apache.commons.lang.Validate;

import java.util.Map;
import java.util.Set;

public class CommandManagerAccess {

    private Map<AddOn, Set<Class<?>>> registeredAddOnCommands;
    private CommandManager delegate;

    public CommandManagerAccess(CommandManager delegate) {
        this.delegate = delegate;
        this.registeredAddOnCommands = Maps.newHashMap();
    }

    public void registerSpleefCommand(Class<?> clazz, AddOn addOn) {
        Validate.isTrue(!isClassRegistered(clazz),
                "Command class " + clazz.getName() + " has already been registered");

        Set<Class<?>> classes = registeredAddOnCommands.get(addOn);
        if (classes == null) {
            classes = Sets.newHashSet();
            registeredAddOnCommands.put(addOn, classes);
        }

        classes.add(clazz);
        delegate.registerSpleefCommands(clazz);
    }

    public void unregisterSpleefCommand(Class<?> clazz) {
        for (Set<Class<?>> set : registeredAddOnCommands.values()) {
            if (set.contains(clazz)) {
                set.remove(clazz);
                delegate.unregisterSpleefCommand(clazz);
                return;
            }
        }

        throw new IllegalArgumentException("Command class " + clazz.getName() + " is not registered");
    }

    public void unregisterSpleefCommands(AddOn addOn) {
        Set<Class<?>> set = registeredAddOnCommands.get(addOn);
        if (set == null) {
            return;
        }

        for (Class<?> clazz : set) {
            delegate.unregisterSpleefCommand(clazz);
        }

        registeredAddOnCommands.remove(addOn);
    }

    private boolean isClassRegistered(Class<?> clazz) {
        for (Set<Class<?>> set : registeredAddOnCommands.values()) {
            if (set.contains(clazz)) {
                return true;
            }
        }

        return false;
    }

}