ee.ellytr.command.util.Collections.java Source code

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Here is the source code for ee.ellytr.command.util.Collections.java

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/*
 * This file is part of EllyCommand.
 *
 * EllyCommand 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.
 *
 * EllyCommand 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 EllyCommand.  If not, see <http://www.gnu.org/licenses/>.
 */
package ee.ellytr.command.util;

import com.google.common.collect.Lists;
import ee.ellytr.command.EllyCommand;
import lombok.NonNull;

import java.util.List;

public class Collections {

    public static <T> List<T> getIntersection(List<T> list1, List<T> list2) {
        List<T> intersection = Lists.newArrayList(list1);
        intersection.retainAll(list2);
        return intersection;
    }

    public static EllyCommand getCommand(List<EllyCommand> commands, String name) {
        for (EllyCommand command : commands) {
            for (String alias : command.getAliases()) {
                if (alias.equalsIgnoreCase(name)) {
                    return command;
                }
            }
        }
        return null;
    }

    public static String[] removeFirstNode(@NonNull String[] array) {
        int length = array.length;

        if (length == 0) {
            return new String[0];
        }

        String[] to = new String[length - 1];
        for (int i = 1; i < length; i++) {
            to[i - 1] = array[i];
        }
        return to;
    }

    public static String[] removeLastNode(@NonNull String[] array) {
        int length = array.length;

        if (length == 0) {
            return new String[0];
        }

        length--;
        String[] to = new String[length];
        for (int i = 0; i < length; i++) {
            to[i] = array[i];
        }
        return to;
    }

}