UserProvider.java

/*
 * 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.example.sender;

import com.google.common.collect.ImmutableList;
import com.sk89q.intake.argument.ArgumentException;
import com.sk89q.intake.argument.ArgumentParseException;
import com.sk89q.intake.argument.CommandArgs;
import com.sk89q.intake.parametric.Provider;
import com.sk89q.intake.parametric.ProvisionException;

import javax.annotation.Nullable;
import java.lang.annotation.Annotation;
import java.util.List;
import java.util.Map;

public class UserProvider implements Provider<User> {

    private final Map<String, User> users;

    public UserProvider(Map<String, User> users) {
        this.users = users;
    }

    @Override
    public boolean isProvided() {
        return false;
    }

    @Nullable
    @Override
    public User get(CommandArgs arguments, List<? extends Annotation> modifiers) throws ArgumentException, ProvisionException {
        String name = arguments.next();
        User user = users.get(name);
        if (user == null) {
            throw new ArgumentParseException("Couldn't find a user by the name '" + name + "'");
        }
        return user;
    }

    @Override
    public List<String> getSuggestions(String prefix) {
        return ImmutableList.of();
    }

}