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Merge pull request JamesZBL#9 from JamesZBL/develop
合并 develop 到 master
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‎iterator/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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MIT License
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Copyright (c) 2017 James
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>java_design_patterns</artifactId>
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<groupId>com.github.JamesZBL</groupId>
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<version>1.11.9-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>iterator</artifactId>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-core</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎iterator/src/main/java/Application.java‎

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/**
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* MIT License
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* <p>
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* Copyright (c) 2017 James
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* <p>
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* <p>
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* <p>
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Iterator
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*/
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public class Application {
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private static final Logger LOGGER = LoggerFactory.getLogger(Application.class);
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public static void main(String[] args) {
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// 查找小说
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ItemIterator iterator = new BookShelfIterator(ItemType.FICTION, new BookShelf());
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LOGGER.info("正在查找小说类图书");
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while (iterator.hasNext()) {
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Item nextItem = iterator.next();
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LOGGER.info("找到了符合条件的图书，书名为：{}", nextItem.toString());
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}
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// 查找IT
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ItemIterator iterator2 = new BookShelfIterator(ItemType.IT, new BookShelf());
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LOGGER.info("正在查找IT类图书");
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while (iterator2.hasNext()) {
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Item nextItem = iterator2.next();
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LOGGER.info("找到了符合条件的图书，书名为：{}", nextItem.toString());
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}
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// 查找漫画
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ItemIterator iterator3 = new BookShelfIterator(ItemType.CARTOON, new BookShelf());
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LOGGER.info("正在查找漫画类图书");
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while (iterator3.hasNext()) {
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Item nextItem = iterator3.next();
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LOGGER.info("找到了符合条件的图书，书名为：{}", nextItem.toString());
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}
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}
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}

‎iterator/src/main/java/BookShelf.java‎

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/**
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* MIT License
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* <p>
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* Copyright (c) 2017 James
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* <p>
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* <p>
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* <p>
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 书架
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*/
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public class BookShelf {
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private List<Item> items;
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public BookShelf() {
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items = new ArrayList<>();
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items.add(new Item(ItemType.FICTION, "西游记"));
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items.add(new Item(ItemType.FICTION, "水浒传"));
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items.add(new Item(ItemType.FICTION, "三国演义"));
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items.add(new Item(ItemType.FICTION, "红楼梦"));
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items.add(new Item(ItemType.CARTOON, "阿衰"));
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items.add(new Item(ItemType.CARTOON, "七龙珠"));
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items.add(new Item(ItemType.CARTOON, "火影忍者"));
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items.add(new Item(ItemType.IT, "设计模式-可复用面向对象软件的基础"));
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items.add(new Item(ItemType.IT, "重构-改善既有代码的设计"));
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items.add(new Item(ItemType.IT, "Effective Java"));
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items.add(new Item(ItemType.IT, "Java编程思想"));
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}
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public List<Item> getItemList() {
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List<Item> list = new ArrayList<>();
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list.addAll(items);
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return list;
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}
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}

‎iterator/src/main/java/BookShelfIterator.java‎

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/**
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* MIT License
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* <p>
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* Copyright (c) 2017 James
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* <p>
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* <p>
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* <p>
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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import java.util.List;
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/**
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* 图书的迭代器
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*/
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public class BookShelfIterator implements ItemIterator {
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private ItemType type;
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private BookShelf shelf;
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private int idx;
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public BookShelfIterator(ItemType type, BookShelf shelf) {
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this.type = type;
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this.shelf = shelf;
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this.idx = -1;
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}
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@Override
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public boolean hasNext() {
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return -1 != getNexIdx();
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}
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@Override
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public Item next() {
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idx = getNexIdx();
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if (-1 != idx) {
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return shelf.getItemList().get(idx);
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}
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return null;
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}
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private int getNexIdx() {
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List<Item> list = shelf.getItemList();
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int tempIdx = idx;
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boolean found = false;
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while (!found) {
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tempIdx++;
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if (tempIdx >= list.size()) {
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tempIdx = -1;
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break;
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}
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if (list.get(tempIdx).getType().equals(type)) {
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break;
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}
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}
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return tempIdx;
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}
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}

‎iterator/src/main/java/Item.java‎

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/**
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* MIT License
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* <p>
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* Copyright (c) 2017 James
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* <p>
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* <p>
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* <p>
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/**
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* 元素
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*/
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public class Item {
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private ItemType type;
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private String name;
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public Item(ItemType type, String name) {
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this.type = type;
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this.name = name;
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}
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public final void setType(ItemType type) {
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this.type = type;
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}
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public ItemType getType() {
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return type;
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}
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@Override
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public String toString() {
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return name;
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}
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}

‎iterator/src/main/java/ItemIterator.java‎

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/**
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* MIT License
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* <p>
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* Copyright (c) 2017 James
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* <p>
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* <p>
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* <p>
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/**
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* 迭代器接口
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*/
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public interface ItemIterator {
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boolean hasNext();
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Item next();
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}

‎iterator/src/main/java/ItemType.java‎

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/**
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* MIT License
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* <p>
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* Copyright (c) 2017 James
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* <p>
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10+
* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* <p>
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* <p>
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/**
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* 元素类型
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*/
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public enum ItemType {
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IT, FICTION, CARTOON
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}

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