sviolet.slate.common.util.common.LambdaBuildable Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of slate-common Show documentation
Comprehensive Java library for spring framework (Java8+)
There is a newer version: 22.1.0
/*
 * Copyright (C) 2015-2019 S.Violet
 *
 * 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.
 *
 * Project GitHub: https://github.com/shepherdviolet/slate
 * Email: [email protected]
 */

package sviolet.slate.common.util.common;

import java.util.*;
import java.util.function.Consumer;
import java.util.function.Supplier;

/**
 * [JAVA8+]用Lambda表达式创建Map/Set/Object/List
 *
 * @since 1.8
 */
public interface LambdaBuildable {

    /**
     * 创建HashMap
     *
     *      *         Map map = buildHashMap(i -> {
     *             i.put("a", "b");
     *             i.put("c", "d");
     *         });
     * 
     *
     * @since 1.8
     */
    default  Map buildHashMap(Consumer> supplier) {
        Map map = new HashMap<>(16);
        if (supplier == null) {
            return map;
        }
        supplier.accept(map);
        return map;
    }

    /**
     * 创建LinkedHashMap
     *
     *      *         Map map = buildLinkedHashMap(i -> {
     *             i.put("a", "b");
     *             i.put("c", "d");
     *         });
     * 
     *
     * @since 1.8
     */
    default  Map buildLinkedHashMap(Consumer> supplier) {
        Map map = new LinkedHashMap<>(16);
        if (supplier == null) {
            return map;
        }
        supplier.accept(map);
        return map;
    }

    /**
     * 创建HashSet
     *
     *      *         Set set = buildHashSet(i -> {
     *             i.add("a");
     *             i.add("c");
     *         });
     * 
     *
     * @since 1.8
     */
    default  Set buildHashSet(Consumer> supplier) {
        Set set = new HashSet<>(16);
        if (supplier == null) {
            return set;
        }
        supplier.accept(set);
        return set;
    }

    /**
     * 创建Object
     *
     *      *         Bean bean = buildObject(() -> {
     *             Bean obj = new Bean();
     *             obj.setName("123");
     *             obj.setId("456");
     *             return obj;
     *         });
     * 
     *
     * @since 1.8
     */
    default  T buildObject(Supplier supplier) {
        return supplier.get();
    }

    /**
     * 创建ArrayList, 一般情况下用Arrays.asList
     *
     *      *     Arrays.asList(
     *          item1,
     *          item2
     *     );
     * 
     *
     *      *         List list = buildArrayList(i -> {
     *            i.add("a");
     *            i.add("b");
     *         });
     * 
     *
     * @since 1.8
     */
    default  List buildArrayList(Consumer> supplier) {
        List list = new ArrayList<>();
        if (supplier == null) {
            return list;
        }
        supplier.accept(list);
        return list;
    }

    /**
     * 创建LinkedList, 一般情况下用Arrays.asList
     *
     *      *         List list = buildLinkedList(i -> {
     *            i.add("a");
     *            i.add("b");
     *         });
     * 
     *
     * @since 1.8
     */
    default  List buildLinkedList(Consumer> supplier) {
        List list = new LinkedList<>();
        if (supplier == null) {
            return list;
        }
        supplier.accept(list);
        return list;
    }

}