Lists.java

/*
 * Copyright 2018 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.soup.commons.util;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class Lists {
    public static class Builder<E> {

        private List<E> result;

        public Builder() {
            result = new ArrayList<>();
        }

        public Lists.Builder<E> add(E e) {
            result.add(e);
            return this;
        }

        public Lists.Builder<E> addAll(List<E> elements) {
            result.addAll(elements);
            return this;
        }

        public Lists.Builder<E> addAll(Collection<E> elements) {
            result.addAll(elements);
            return this;
        }

        public List<E> build() {
            return result;
        }
    }
}